Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Kazunori Yoshiura Last modified date:2019.08.19

Professor / Division of Maxillofacial Diagnostic and Surgical Sciences / Department of Dental Science / Faculty of Dental Science


Papers
1. Warangkana Weerawanich, Mayumi Shimizu, Yohei Takeshita, Kazutoshi Okamura, Shoko Yoshida, Gainer R. Jasa, Kazunori Yoshiura, Evaluation of cone-beam computed tomography diagnostic image quality using cluster signal-to-noise analysis, Oral Radiology, 10.1007/s11282-018-0325-0, 35, 59-67, 2018.03.
2. Chikui T, Yamashita Y, Kise Y, Saito T, Okamura K, Yoshiura K, Estimation of proton density fat fraction of the salivary gland
, Br J Radiol., 10.1259/bjr.20170671, 91, 1085, 2018.05.
3. Yohei Takeshita, Mayumi Shimizu, Gainer R. Jasa, Warangkana Weerawanich, Kazutoshi Okamura, Shoko Yoshida, Kenji Tokumori, Junichi Asaumi, Kazunori Yoshiura, Prediction of detectability of the mandibular canal by quantitative image quality evaluation using cone beam ct, Dentomaxillofacial Radiology, 10.1259/dmfr.20170369, 47, 4, 2018.01, Objectives: To compare the results of a new quantitative image quality evaluation method that requires no observers with the results of receiver operating characteristic (ROC) analysis in detecting the mandibular canal (MC) in cone beam CT (CBCT) images. Methods: A Teflon (polytetrafluoroethylene) plate phantom with holes of different depths was scanned with two CBCT systems. One CBCT system was equipped with an image intensifier (Experiment 1), and the other was equipped with a flat panel detector (Experiment 2). Holes that were above the threshold gray value (ΔG), calculated using just-noticeable difference (JND), were extracted. The number of extracted holes was used as the index of the image quality, and was compared with the Az values calculated by ROC analysis to detect the MC. Results: The number of extracted holes reflected the influence of different scanning conditions, and showed a strong correlation with the Az values calculated by ROC analysis. Indices of the number of extracted holes corresponding to high Az values for detecting the MC were obtained in both experiments. conclusions: Our image quality evaluation method applying JND to images of a standardized phantom is a quantitative method that could be useful for evaluating the detectability of the MC in CBCT images..
4. Wannakamon Panyarak, Toru Chikui, Yasuo Yamashita, Takeshi Kamitani, Kazunori Yoshiura, Image Quality and ADC Assessment in Turbo Spin-Echo and Echo-Planar Diffusion-Weighted MR Imaging of Tumors of the Head and Neck, Academic Radiology, 10.1016/j.acra.2018.11.016, 2018.01, Rationale and Objectives: We aimed to compare the distortion ratio (DR), signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) between turbo spin-echo (TSE)-diffusion-weighted imaging (DWI) and echo-planar imaging (EPI)-DWI of the orofacial region and prove the usefulness of TSE-DWI for the differential diagnosis of orofacial lesions. Materials and methods: The DR, SNR, and CNR of both sequences were compared in 42 cases. Then, the apparent diffusion coefficient (ADC) of various orofacial lesions obtained by TSE-DWI was investigated in 143 lesions. Results: In the first study, 38 of 42 cases were analyzed. TSE-DWI showed a significantly lower DR (p < 0.05) and higher SNR and CNR than EPI-DWI (p < 0.05), indicating the superiority of TSE-DWI. In the second study, 114 cases (79.3%) were successfully analyzed. When lesions were divided into cysts, benign tumors, squamous cell carcinoma, malignant lymphoma, and other malignant tumors (OT), significant differences were observed in all pairs of lesions (p < 0.05) except squamous cell carcinoma and OT (p = 0.877). The area under the curve for distinguishing benign from malignant tumors was 0.80 with a cutoff ADC of 1.29 × 10-3 mm²/s. Conclusion: TSE-DWI produced better quality images than EPI-DWI. TSE-DWI yields the high possibility of obtaining ADC in the orofacial region, and this value was considered useful for the differential diagnosis of orofacial lesions..
5. Tatsushi Tokuyasu, Tsubasa Maruyama, Takahiro Yamamoto, Kazuhiko Toshimitsu, Kazutoshi Okamura, Kazunori Yoshiura, Development of virtual patient model for maxillofacial palpation training using Meshless method, IEEJ Transactions on Electronics, Information and Systems, 10.1541/ieejeiss.138.899, 138, 7, 899-905, 2018.01, For dental therapy, a dentist often touches a patient face in order to identify the causes of pains such as a tumor and/or cancer. Although the importance of maxillofacial palpation has been recognized, practical training with a dental patient has not been conducted for taking care of the safety of the patient in dental school. The training of therapeutic planning with an advising doctor would be effective to enhance the quality of dental therapy. Then, this study has developed a virtual training system for maxillofacial palpation which can be utilized in dental education. In this study, we first took a multi-slice CT data from a human head mannequin in order to obtain the shape data of a virtual patient model. This study adopted Meshless Method (MLM) to construct the dynamic model of the virtual patient model. In the experimental results using a haptic interface, PHANToM Omni, the parameters of MLM influenced the surface deformation of the virtual patient model. This paper finally discussed the availability of MLM for the virtual training system and clarified the current issues that should be solved to utilize the system in dental education..
6. Warangkana Weerawanich, Mayumi Shimizu, Yohei Takeshita, Kazutoshi Okamura, Shoko Yoshida, Gainer R. Jasa, Kazunori Yoshiura, Determination of optimum exposure parameters for dentoalveolar structures of the jaws using the CB MercuRay system with cluster signal-to-noise analysis, Oral Radiology, 10.1007/s11282-018-0348-6, 2018.01, Objective: To determine the optimum cone beam computed tomography exposure parameters for specific diagnostic tasks. Methods: A Teflon phantom attached to a half-mandible in a large container was scanned in dental (D), implant (I), and panoramic (P) modes. An identical phantom in a small container was scanned in D mode. Both were scanned at 60, 80, 100, and 120 kV. We evaluated the image quality of five anatomical structures [dentinoenamel junction (1), lamina dura and periodontal ligament space (2), trabecular pattern (3), cortex–spongy bone junction (4), and pulp chamber and root canal (5)] and analyzed the diagnostic image quality with cluster signal-to-noise analysis. We then evaluated correlations between the two image qualities and calculated the threshold of acceptable diagnostic image quality. Optimum exposure parameters were determined from images with acceptable diagnostic image quality. Results: For the small container, the optimum exposure parameters were D mode, 80 kV for (1), (3), and (4) and D mode, 100 kV for (5). For the large container, they were D mode, 120 kV for (1), (3), and (5) and D mode, 100 kV for (4). I mode, 120 kV reached the acceptable level for (4). No images reached the acceptable level for (2). Conclusions: No optimum exposure parameters were identified for the evaluation of the lamina dura and periodontal ligament space. D mode was sufficient for the other structures; however, the tube voltage required for each structure differed. Smaller patients required lower tube voltage. I mode, 120 kV may be used for larger lesions..
7. Toru Chikui, Yasuo Yamashita, Yoshitaka Kise, Tomonori Saito, Kazutoshi Okamura, Kazunori Yoshiura, Estimation of proton density fat fraction of the salivary gland, British Journal of Radiology, 10.1259/bjr.20170671, 91, 1085, 2018.01, Objective: Our first objective was to prove the validity of the six-point Dixon method for estimating the proton density fat fraction (PDFF) of the salivary gland. The second objective was to estimate the salivary gland PDFF using Dixon method to evaluate the pathological conditions. Methods: At first, 12 volunteers underwent two types of sequences: single-voxel magnetic resonance spectroscopy and the Dixon method and the PDFFs obtained by the two methods were compared. Next, a total of 67 individuals [normal, n = 46; Sjögren's syndrome (SS), n = 11; and IgG4-related dacryoadenitis and sialadenitis (IgG4-DS), n = 4, parotitis, n = 6] were enrolled to estimate the parotid gland (PG) and submandibular gland (SMG) PDFF using the Dixon method. Results: This volunteer study demonstrated excellent correlation between two methods (R2 = 0.964, slope = 1.05). In the normal group, the PG-PDFF was correlated with the weight and body mass index (BMI) (ρ = 0.38, p = 0.0085; and ρ = 0.63, p < 0.0001). The SMG-PDFF was also correlated with the weight, BMI, and serum triglyceride (ρ = 0.37, p = 0.0067; ρ = 0.42, p = 0.0022; and ρ = 0.35, p = 0.024). The PG-PDFF of the SS group (48.2 ± 15.1%) was higher than that of any other groups; however, no significant difference was found due to the wide overlap. The SS group (39.0 ± 26.14%) also had significantly higher SMG-PDFF than the normal group (8.9 ± 5.4%), p < 0.0001) and IgG4-DS group (3.8 ± 2.3%), p = 0.020). Conclusion: The Dixon method is a feasible method for estimating the PDFF and demonstrates fat accumulation in SMG in the SS group. Advances in knowledge: The PDFF obtained by the Dixon method is helpful for understanding the salivary gland pathological condition..
8. Warangkana Weerawanich, Mayumi Shimizu, Yohei Takeshita, Kazutoshi Okamura, Shoko Yoshida, Kazunori Yoshiura, Cluster signal-to-noise analysis for evaluation of the information content in an image, Dentomaxillofacial Radiology, 10.1259/dmfr.20170147, 47, 1, 2018.01, Objectives: (1) To develop an observer-free method of analysing image quality related to the observer performance in the detection task and (2) to analyse observer behaviour patterns in the detection of small mass changes in cone-beam CT images. Methods: 13 observers detected holes in a Teflon phantom in cone-beam CT images. Using the same images, we developed a new method, cluster signal-to-noise analysis, to detect the holes by applying various cut-off values using ImageJ and reconstructing cluster signal-tonoise curves. We then evaluated the correlation between cluster signal-to-noise analysis and the observer performance test. We measured the background noise in each image to evaluate the relationship with false positive rates (FPRs) of the observers. Correlations between mean FPRs and intra- and interobserver variations were also evaluated. Moreover, we calculated true positive rates (TPRs) and accuracies from background noise and evaluated their correlations with TPRs from observers. Results: Cluster signal-to-noise curves were derived in cluster signal-to-noise analysis. They yield the detection of signals (true holes) related to noise (false holes). This method correlated highly with the observer performance test (R2 = 0.9296). In noisy images, increasing background noise resulted in higher FPRs and larger intra- and interobserver variations. TPRs and accuracies calculated from background noise had high correlation with actual TPRs from observers; R2 was 0.9244 and 0.9338, respectively. Conclusions: Cluster signal-to-noise analysis can simulate the detection performance of observers and thus replace the observer performance test in the evaluation of image quality. Erroneous decision-making increased with increasing background noise..
9. Warangkana Weerawanich, Mayumi Shimizu, Yohei Takeshita, Kazutoshi Okamura, Shoko Yoshida, Gainer R. Jasa, Kazunori Yoshiura, Evaluation of cone-beam computed tomography diagnostic image quality using cluster signal-to-noise analysis, Oral Radiology, 10.1007/s11282-018-0325-0, 1-9, 2018.03, Objectives: (1) We sought to assess correlation among four representative parameters from a cluster signal-to-noise curve (true-positive rate [TPR] corresponding to background noise, accuracy corresponding to background noise, maximum TPR, and maximum accuracy) and the diagnostic accuracy of the identification of the mandibular canal using data from observers in a previous study, under the same exposure conditions. (2) We sought to clarify the relationship between the hole depths of a phantom and diagnostic accuracy. Methods: CBCT images of a Teflon plate phantom with holes of decreasing depths from 0.7 to 0.1 mm were analyzed using the FindFoci plugin of ImageJ. Subsequently, we constructed cluster signal-to-noise curves by plotting TPRs against false-positive rates. The four parameters were assessed by comparing with the diagnostic accuracy calculated from the observers. To analyze image contrast ranges related to detection of mandibular canals, we determined five ranges of hole depths, to represent different contrast ranges—0.1–0.7, 0.1–0.5, 0.2–0.6, 0.2–0.7 and 0.3–0.7 mm—and compared them with observers’ diagnostic accuracy. Results: Among the four representative parameters, accuracy corresponding to background noise had the highest correlation with the observers’ diagnostic accuracy. Hole depths of 0.3–0.7 and 0.1–0.7 mm had the highest correlation with observers’ diagnostic accuracy in mandibles with distinct and indistinct mandibular canals, respectively. Conclusions: The accuracy corresponding to background noise obtained from the cluster signal-to-noise curve can be used to evaluate the effects of exposure conditions on diagnostic accuracy..
10. Gainer R Jasa, Mayumi Shimizu, Kazutoshi Okamura, 徳森謙二, Takeshita Y, Weerawanich W, 吉浦 一紀, Effects of exposure parameters and slice thickness on detecting clear and unclear mandibular canals using cone beam CT, DENTOMAXILLOFACIAL RADIOLOGY, 10.1259/dmfr.20160315, 46, 4, 2017.05.
11. Yoshitaka Kise, Toru Chikui, Yamashita Y, Kobayashi K, 吉浦 一紀, Clinical usefulness of the mDIXON Quant the method for estimation of the salivary gland fat fraction: comparison with MR spectroscopy, Br J Radiol, 10.1259/bjr.20160704, 90, 2017.07.
12. Hiroko Furuhashi, Toru Chikui, Daisuke Inadomi, Tomoko Shiraishi, 吉浦 一紀, Fundamental tongue motions for trumpet playing: A study using cine Magnetic Resonance Imaging (Cine MRI), Medical Problems of Performing Artists, 10.21091/mppa.2017.4038, 32, 4, 201-208, 32(4):201-208, 2017.12.
13. Yohei Takeshita, Mayumi Shimizu, Kazutoshi Okamura, Shoko Yoshida, Warangkana Weerawanich, Kenji Tokumori, Gainer R. Jasa, Kazunori Yoshiura, A new method to evaluate image quality of CBCT images quantitatively without observers, Dentomaxillofacial Radiology, 10.1259/dmfr.20160331, 46, 3, 2017.03, Objectives: To develop an observer-free method for quantitatively evaluating the image quality of CBCT images by applying just-noticeable difference (JND). Methods: We used two test objects: (1) a Teflon (polytetrafluoroethylene) plate phantom attached to a dry human mandible; and (2) a block phantom consisting of a Teflon step phantom and an aluminium step phantom. These phantoms had holes with different depths. They were immersed in water and scanned with a CB MercuRay (Hitachi Medical Corporation, Tokyo, Japan) at tube voltages of 120 kV, 100 kV, 80 kV and 60 kV. Superimposed images of the phantoms with holes were used for evaluation. The number of detectable holes was used as an index of image quality. In detecting holes quantitatively, the threshold grey value (DG), which differentiated holes from the background, was calculated using a specific threshold (the JND), and we extracted the holes with grey values above DG. The indices obtained by this quantitative method (the extracted hole values) were compared with the observer evaluations (the observed hole values). In addition, the contrast-to-noise ratio (CNR) of the shallowest detectable holes and the deepest undetectable holes were measured to evaluate the contribution of CNR to detectability. Results: The results of this evaluation method corresponded almost exactly with the evaluations made by observers. The extracted hole values reflected the influence of different tube voltages. All extracted holes had an area with a CNR of $1.5. Conclusions: This quantitative method of evaluating CBCT image quality may be more useful and less time-consuming than evaluation by observation..
14. Sitti Fadhillah Oemar Mattaliti, 河津 俊幸, 川野 真太郎, 碇 竜也, 和田 裕子, 吉浦 一紀, Estimation of prognosis of tongue cancer using tumor depth and margin shape obtained from ultrasonography, Oral Radiology, 10.1007/s11282-016-0251-y, 2016.06.
15. 清水 真弓, 岡村 和俊, Yoshitaka Kise, 竹下洋平, 古橋寛子, Warangkana Weerawanich, 森山 雅文, 大山 順子, Sachiko Furukawa, Seiji Nakamura, 吉浦 一紀, Effectiveness of imaging modalities for screening IgG4-related dacryoadenitis and sialadenitis (Mikulicz’s disease) and for differentiating it from Sjögren’s syndrome (SS), with an emphasis on sonography, Arthritis Research & Therapy, 10.1186/s13075-015-0751-x, 17, 223-234, 17:223-234, 2015.08.
16. E Kitamoto, Toru Chikui, Shintaro Kawano, M Ohga, K Kobayashi, Y Matsuo, Takashi Yoshiura, M Obara, Hiroshi Honda, Kazunori Yoshiura, The application of dynamic contrast-enhanced MRI and diffusion-weighted MRI in patients with maxillofacial tumors., Acta Radiologica, 22, 2, 210-216, 2015.02.
17. Tatsushi Tokuyasu, Kazuhiko Toshimitsu, 岡村 和俊, 吉浦 一紀, Virtual palpation simulator for dental education., ICIC Express Letters, 6, 1, 181-185, 6:1, 181-185, 2015.01.
18. Tatsushi Tokuyasu, Kazuhiko Toshimitsu, 岡村 和俊, 吉浦 一紀, Construction of Virtual Patient Model for Maxillofacial Palpation Training System., International Journal of Artificial Life and Robotics, 19, 2, 176-180, 19:2, 176-180, 2014.06.
19. 清水 真弓, D Ogawa, 岡村 和俊, 河津 俊幸, 筑井 徹, 吉浦 一紀, Dentigerous cysts with calcification mimicking odontogenic tumors: differential diagnosis by CT., Oral Radiol, 30, 1, 173-175, 30:173-175, 2014.06.
20. Yuko Nakamura, KENJI TOKUMORI, Takashi Yoshiura, K Kobayashi, Y Nakamura, Hiroshi Honda, Kazunori Yoshiura, TK Got0, Localization of the primary taste cortex by contrasting passive and attentive conditions, Exp Brain Res, 227, 2, 185-197, 227:185-197, 2013.06, It remains unclear how the cerebral cortex of humans
perceives taste temporally, and whether or not such
objective data about the brain show a correlation
with the current widely used conventional methods of
taste–intensity sensory evaluation. The aim of this study
was to investigate the difference in the time–intensity
profile between salty and sweet tastes in the human brain.
The time–intensity profiles of functional MRI (fMRI) data of
the human taste cortex were analyzed using finite impulse
response analysis for a direct interpretation in terms
of the peristimulus time signal. Also, time–intensity
sensory evaluations for tastes were performed under the
same condition as fMRI to confirm the reliability of the
temporal profile in the fMRI data. The time–intensity
profile for the brain activations due to a salty taste changed
more rapidly than those due to a sweet taste in the
human brain cortex and was also similar to the
time–intensity sensory evaluation, confirming the reliability
of the temporal profile of the fMRI data. In conclusion,
the time–intensity profile using finite impulse response
analysis for fMRI data showed that there was a temporal
difference in the neural responses between salty and
sweet tastes over a given period of time. This indicates
that there might be taste-specific temporal profiles of
activations in the human brain..
21. Yukiko Nishioka Kami, Toru Chikui, Tomoko Shiraishi, Kenji Yuasa, Kazunori Yoshiura, A new method for displaying the lingual artery using high-resolution three-dimensional phase-contrast magnetic resonance angiography, Int J Oral Maxillofac Surg, 42, 1494-1498, 42: 1494-1498, 2013.05.
22. Nakamura Y, Goto KT, Tokumori K, Yoshiura T, Kobayashi K, Nakamura Y, Honda H, Ninomiya Y, Yoshiura K, The temporal change in the cortical activations due to salty
and sweet tastes in humans: fMRI and time–intensity sensory
evaluation, NeuroReport, 23, 400-404, 23:400-404, 2012.05, It remains unclear how the cerebral cortex of humans
perceives taste temporally, and whether or not such
objective data about the brain show a correlation
with the current widely used conventional methods of
taste–intensity sensory evaluation. The aim of this study
was to investigate the difference in the time–intensity
profile between salty and sweet tastes in the human brain.
The time–intensity profiles of functional MRI (fMRI) data of
the human taste cortex were analyzed using finite impulse
response analysis for a direct interpretation in terms
of the peristimulus time signal. Also, time–intensity
sensory evaluations for tastes were performed under the
same condition as fMRI to confirm the reliability of the
temporal profile in the fMRI data. The time–intensity
profile for the brain activations due to a salty taste changed
more rapidly than those due to a sweet taste in the
human brain cortex and was also similar to the
time–intensity sensory evaluation, confirming the reliability
of the temporal profile of the fMRI data. In conclusion,
the time–intensity profile using finite impulse response
analysis for fMRI data showed that there was a temporal
difference in the neural responses between salty and
sweet tastes over a given period of time. This indicates
that there might be taste-specific temporal profiles of
activations in the human brain..
23. Toru Chikui, E Kitamoto, Shintaro Kawano, Tsuyoshi Sugiura, M Obara, AW Shimonetti, M Hatakenaka, Y Matsuo, S Koga, M Ohga, Katsumasa Nakamura, Kazunori Yoshiura, Pharamacokinetic analysis based on dynamic contrast-enhanced MRI for evaluating tumor response to preoperative therapy for oral cancer, J Magn Reson Imaging, 36, 3, 589-597, 36(3):589-597, 2012.03.
24. Shiraishi T, Chikui T, Inadomi D, Kagawa T, Yoshiura K, Yuasa K, Evaluation of diffusion parameters and T2 values of the masseter
muscle during jaw opening, clenching, and rest, Acta Radiologica, 53, 1, 81-86, 53:81-86, 2012.01.
25. Kami YN, Chikui T, Okamura K, Kubota Y, Oobu K, Yabuuchi H, Nakayama E, Hashimoto K, Yoshiura K, Imaging findings of neurogenic tumours in the head and neck region, Dentomaxillofac Radiol, 41, 1, 18-23, 41:18-23, 2012.01.
26. Okamura K, Yoshiura K, Tatsumi M, Kawazu, T, Chikui T, Shimizu M, Goto, T, A new method for evaluating perceptible contrast information in digital intraoral radiographic systems, Oral Radiology, 27, 2, 98-101, 27:98-101, 2011.12.
27. 筑井 徹, Shintaro Kawano, 河津 俊幸, Masamitsu Hatakenaka, Koga S, Ohga M, Yoshio Matsuo, Sunami Shunya, Tsuyoshi Sugiura, Shioyama Y, Obara M, 吉浦 一紀, Prediction and monitoring of the response to chemoradiotherapy in oral squamous cell carcinomas using a pharmacokinetic analysis based on the dynamic contrast-enhanced MR imaging findings, Eur Radiol, 21, 8, 1699-1708, 21(8):1699-1708, 2011.03.
28. Tutsumi K, Chikui T, Okamura K, Yoshiura K, Accuracy of Linear Measurement and the Measurement Limits of Thin Objects with Cone Beam Computed Tomography: Effects of Measurement Directions and of Phantom Locations in the Fields of View, J Oral Max Impl, 26, 1, 91-100, 26(1):91-100, 2011.01.
29. Shiraishi T, Chikui T, Yoshiura K, Yuasa K, Evaluation of T2 values and apparent diffusion coefficient of the masseter muscle by clenching, Dentomaxillofacial Radiology, 40, 1, 35-41, 40(1):35-41, 2011.01.
30. Chikui T, Shiraishi T, Tokumori K, Inatomi D, Hatakenaka M, Yuasa K, Yoshiura K, Assessment of the sequential change of the masseter muscle by clenching: a quantitative analysis of T1, T2, and the signal intensity of the balanced steady-state free precession, Acta Radiol, 51, 669-678, 51:669-678, 2010.09.
31. Chikui T, Shiraishi T, Ichihara T, Kawazu T, Hatakenaka M, Kami Y, Yuasa K, Yoshiura K, Effect of clenching on T2 and diffusion parameters of the masseter muscle, Acta Radiologica, 2010(1):58-63, 2010.01.
32. Toru Chikui, Kenji Tokumori, Ryosuke Zeze, Tomoko Shiraishi, Takahiro Ichihara, Masamitsu Hatakenaka, Kazunori Yoshiura, A fast Look-Locker method for T1 mapping of the head and neck region, Oral Radiol , 25:22-29, 2009.12.
33. Toru Chikui, Mayumi Shimizu, Toshiyuki Kawazu, Kazutoshi Okamura, Tomoko Shiraishi, Kazunori Yoshiura, A quantitative analysis of sonographic images of the salivary gland: A comparison between the sonographic findings and the sialographic findings, Ultrasound in Med&Biol , 35(8):1257-1264, 2009.08.
34. Shimizu M, Moriyama M, Okamura K, Kawazu T, Chikui T, Goto KT, Ohyama Y, Nakamura S, Yoshiura K, Sonographic diagnosis for Mikulicz disease, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 108(1):105-113, 2009.07.
35. Shimizu M, Okamura K, Yoshiura K, Ohyama Y, Nakamura S, Sonographic diagnosis of Sjögren syndrome: evaluation of parotid gland vascularity as a diagnostic tool, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 106(10):587-594, 2008.10.
36. Kami NY, Goto KT, Tokumori K, Yoshiura T, Kobayashi K, Nakamura Y, Honda H, Ninomiya Y, Yoshiura K, The development of a novel automated taste stimulus delivery system for fMRI studies on the human cortical segregation of taste, Journal of Neuroscience Methods, 172(1):48-53, 2008.04.
37. Nakayama E, Okamura K, Mitsuyasu T, Kawazu T, Nakamura N, Nakamura S, Yoshiura K, A newly developed interventional sialendoscope for a completely nonsurgical sialolithectomy using intracorporeal electrohydraulic lithotripsy, J Oral Maxillofac Surg, 103(4): 550-559, 2007.04.
38. Tazuko K. Goto, Satoko Nishida, Yuko Nakamura, Kenji Tokumori, Yasuhiko Nakamura, Koji Kobayashi, Yutaka Yoshida and Kazunori Yoshiura, The accuracy of 3-dimensional magnetic resonance 3D vibe images of the mandible: an in vitro comparison of magnetic resonance imaging and computed tomography, Oral Surg. Oral Med. Oral Pathol. Oral Radiol. and Endod, 103(4): 550-559, 2007.04.
39. Shimizu M, Okamura K, Yoshiura K, Ohyama Y, Nakamura S, Kinukawa N, Sonographic diagnostic criteria for screening Sjögren's syndrome, Oral Surg. Oral Med. Oral Pathol. Oral Radiol. and Endod, 102(1): 85-93, 2006.07.
40. Goto KT, Nishida S, Yahagi M, Langenbach GEJ, Nakamura Y, Tokumori K, Sakai S, Yabuuchi H, Yoshiura K, Size and Orientation of Masticatory Muscles in Patients with Mandibular Laterognathim, JDR, 85(6): 552-556, 2006.06.
41. Chikui T, Okamura K, Tokumori K, Nakamura S, Shimizu M, Koga M, Yoshiura K, Quantitative analyses of sonographic images of the parotid gland in patients with Sjögren's syndrome, Ultrasound Med Biol, 32(5): 617-22, 2006.05.
42. Shimizu M, Osa N, Okamura K, Yoshiura K, CT analysis of the Stafne's bone defects of the mandible, Dentomaxillofac. Radiol., 35(2): 95-102, 2006.03.
43. Goto TK, Nishida S, Nakayama E, Nakamura Y, Sakai S, Yabuuchi H, Yoshiura K, Correlation of mandibular deviation with temporomandibular joint MR dimensions, MR disk position, and clinical symptoms, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1016/j.tripleo.2005.05.063, 100, 6, 743-749, 100(6): 743-749, 2005.12.
44. Yoshiura K, Okamura K, Tokumori K, Nakayama E, Chikui T, Goto TK, Shimizu M, Kawazu T, Correlation between diagnostic accuracy and perceptibility, Dentomaxillofac. Radiol., 10.1259/dmfr/13550415, 34, 6, 350-352, 34(6): 350-352, 2005.11.
45. Toru Chikui, Kenji Tokumori, Kazunori Yoshiura, Kazunari Oobu, Seiji Nakamura, Katsumasa Nakamura., Sonographic texture characterization of salivary gland tumors by fractal analyses., Ultrasound Med Biol., 10.1016/j.ultrasmedbio.2005.05.012, 31, 10, 1297-1304, 31(10):1297-304, 2005.10.
46. Nakayama E, K Sugiura, H Ishibashi, K Ohbu, I Kobayashi, K Yoshiura, The clinical and diagnostic imaging findings of osteosarcoma of the jaw, Dentomaxillofac. Radiol., 10.1259/dmfr/71175262, 34, 3, 182-188, 34(3): 182-188, 2005.05.
47. Yoshiura K, Nakayama E, Shimizu M, Goto TK, Chikui T, Kawazu T, Okamura K, Effects of the automatic exposure compensation on the proximal caries diagnosis, Dentomaxillofac. Radiol., 10.1259/dmfr/88681265, 34, 3, 140-144, 34(3): 140-144, 2005.05.
48. Goto TK, Yahagi M, Nakamura Y, Tokumori K, Langenbach GEJ, Yoshiura K, In vivo Cross-sectional Area of Human Jaw Muscles Varies with Section Location and Jaw Position, J Dent Res, 84, 6, 570-575, 84(6): 570-575, 2005.06.
49. Shimizu M, Yoshiura K, Nakayama E, Kanda S, Nakamura S, Ohyama Y, Nakamura N., Multiple sialolithiasis in the parotid gland with Sjogren's syndrome and its sonographic findings -Report of 3 cases, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1016/j.tripleo.2004.04.014, 99, 1, 85-92, 99(1): 85-92, 2005.01.
50. Chikui T, Shimizu M, Goto K T, Nakayama E, Yoshiura K, Kanda S, Oobu K, Nakamura S., Interpretation of the origin of a submandibular mass by CT and MRI imaging, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1016/j.tripleo.2004.02.054, 98, 6, 721-729, 98(6): 721-729, 2004.12.
51. Shi X-Qi, Li G, Yoshiura K, Welander U., Perceptibility curve test for conventional and colour-coded radiographs, Dentomaxillofac Radiol, 33(5): 318-322, 2004.09.
52. Mastoris M, Yoshiura K, Welander U, Tsiklakis K, Papadakis E, Li G., Psychophysical properties of a new F-speed intraoral film, Dentomaxillofac Radiol, 10.1259/dmfr/879596919, 33, 3, 158-163, 33(3): 158-163, 2004.05.
53. Yoshiura K, Welander U, McDavid WD, Li G, Shi X-Q, Nakayama E, Shimizu M, Okamura K, Kanda S., Comparison of the psychophysical properties of various intraoral film and digital systems by means of the perceptibility curve test, Dentomaxillofac Radiol, 10.1259/dmfr/29102849, 33, 2, 98-102, 33(2): 98-102, 2004.03.
54. Nakayama E., Yoshiura K., Ozeki S., Nakayama H., Yamaguchi T., Yoshikawa H., Kanda S., Oishi M., and Shirasuna K., The correlation of histologic features with a panoramic radiography pattern and a computed tomography pattern of bone destruction in carcinoma of the mandibular gingival., Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod., 10.1016/S1079-2104(03)00458-X, 96, 6, 774-782, 96(6): 774-782, 2003.12.
55. Kawazu T., Araki K., Yoshiura K., Nakayama E., and Kanda S., Application of neural networks to the prediction of lymph node metastasis in oral cancer, Oral Radiol, 19(2): 137-142, 2003.12.
56. Li G, Welander U, Yoshiura K, Shi X-Q, McDavid WD., Perceptibility curve test for digital radiographs before and after correction for attenuation and correction for attenuation and visual response, Dentomaxillofac Radiol, 10.1259/dmfr/64530544, 32, 6, 372-378, 32(6): 372-378, 2003.11.
57. Yoshiura K, Welander U, Li G, Shi X-Q, McDavid WD, Kawazu T, Tatsumi M, Okamura K, Kanda S, Analysis of different approaches to constructing perceptibility curves, Oral Radiol, 2003.06.
58. Takashima A, Yoshiura K, Tokumori K, Kawazu T, Kanda S, Quantitative analysis of radiological changes in alveolar bone around connected osseo-integrated dental implants and natural abutment teeth, Oral Radiol, 2003.06.
59. Li G, Yoshiura K, Shi X-Q, Welander U, McDavid WD, Physical properties of a system for direct acquisition of digital intraoral radiographs, Oral Radiol, 2003.06.
60. Yoshiura K, Welander U, McDavid WD, Li G, Shi X-Q, Kawazu T, Tatsumi M, Matsuo T, Kanda S, Perceptibility curves for the Digora system, Dentomaxillofac Radiol, 10.1259/dmfr/25806978, 32, 3, 191-197, 2003.05.
61. Li G, Yoshiura K, Welander U, Sallstrom P, McDavid WD, Visual linearization of the display of digital radiographs, Dentomaxillofac Radiol, 2002.05.
62. Welander U, Yoshiura K, Li G, Sallstrom P, McDavid WD, Correction for attenuation and visual response in digital radiography, Dentomaxillofac Radiol, 2002.05.
63. Li G, Yoshiura K, Welander U, Shi X-Q, McDavid WD, Detection of approximal caries in digital radiographs before and after correction for attenuation and visual response. An in vitro study, Dentomaxillofac Radiol, 2002.05.
64. Yoshiura K, Welander U, Shi X-Q, Li G, Kawazu T, Tatsumi M, Okamura K, McDavid WD, Kanda S, Conventional and predicted Perceptibility Curves for contrast-enhanced direct digital intraoral radiographs, Dentomaxillofacial Radiology, 10.1038/sj.dmfr.4600607, 30, 4, 219-225, 2001.07.
65. Shimizu M, Tokumori K, Okamura K, Chikui T, Yoshiura K, Kanda S, Possibility of sialographic sonography: A Doppler phantom study, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1067/moe.2001.113832, 91, 6, 719-727, 2001.06.
66. Okamura K, Tanaka T, Yoshiura K, Tokumori K, Yuasa K, Kanda S, Integration of a picture archiving and communication system with videocapture and computed radiography in a dental hospital, Dentomaxillofacial Radiology, 10.1038/sj.dmfr.4600599, 30, 3, 172-178, 2001.05.
67. Goto KT, Yoshiura K, Nakayama E, Yuasa K, Tabata O, Nakano T, Kawazu T, Tanaka T, Miwa K, Shimizu M, Chikui T, Okamura K, Kanda S, The combined use of US and MR imaging for the diagnosis of masses in the parotid region, Acta Radiologica, 10.1080/028418501127346305, 42, 1, 88-95, 2001.01.
68. Nakayama E, Yoshiura K, Yuasa K, Kanda S, Saitoh M, Kage W, Ikebe T, Ozeki S, Shinohara M, A study of the association between the prognosis of carcinoma of the mandibular gingiva and the pattern of bone destruction on computed tomography, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600527, 29, 3, 163-169, 2000.05.
69. Shimizu M, Tokumori K, Saitoh M, Miwa K, Yoshiura K, Kanda S, Sonographic analysis of rat submandibular glands in experimentally-induced sialadenitis, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600508, 29, 2, 90-96, 2000.01.
70. Yoshiura K, Stamatakis HC, Welander U, McDavid WD, Shi X-Q, Ban S, Kawazu T, Tatsumi M, Kanda S, Physical evaluation of a system for direct digital intra-oral radiography based on a charge-coupled device, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600457, 28, 5, 277-283, 1999.09.
71. Nakayama E, Yoshiura K, Yuasa K, Tabata O, Araki K, Kanda S, Ozeki S, Shinohara M, Detection of bone invasion by gingival carcinoma of the mandible: a comparison of intraoral and panoramic radiography and computed tomography, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600480, 28, 6, 351-356, 1999.11.
72. Yoshiura K, Stamatakis HC, Welander U, McDavid WD, Shi X-Q, Ban S, Kawazu T, Chikui T, Kanda S, Prediction of Perceptibility Curves of direct digital intraoral radiographic systems, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600450, 28, 4, 224-231, 1999.07.
73. Stamatakis HC, Yoshiura K, Shi X-Q, Welander U, McDavid WD, A Simplified method to obtain Perceptibility Curves for direct dental digital CCD detectors, Dentomaxillofac Radiol, 1999.03.
74. Yoshiura K, Kawazu T, Chikui T, Tatsumi M, Tokumori K, Tanaka T, Kanda S, Assessment of image quality in dental radiography, part 2 Optimum exposure conditions for detection of small mass changes in 6 intraoral radiography systems, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1016/S1079-2104(99)70305-7, 87, 1, 123-129, 1999.01.
75. Yoshiura K, Kawazu T, Chikui T, Tatsumi M, Tokumori K, Tanaka T, Kanda S, Assessment of image quality in dental radiography, part 1 Phantom validity, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1016/S1079-2104(99)70304-5, 87, 1, 115-122, 1999.01.
76. Shimizu M, Ussmueller J, Donath K, Yoshiura K, Ban S, Kanda S, Ozeki S, Shinohara M, Sonographic analysis of recurrent parotitis in children A comparative study with sialographic findings, Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 10.1016/S1079-2104(98)90355-9, 86, 5, 606-615, 1998.11.
77. Yoshiura K, Stamatakis H, Shi X-Q, Welander U, McDavid WD, Kristoffersen J, Tronje G, The perceptibility curve test applied to direct digital dental radiography, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600332, 27, 3, 131-135, 1998.05.
78. Yoshiura, K., Tabata, O., Miwa, K., Tanaka, T., Shimizu, M., Higuchi, Y., Shinohara, M., Kanda, S., Computed tomographic features of calcigying odontogenic cysts, Dentomaxillofac Radiol, 10.1038/sj.dmfr.4600305, 27, 1, 12-16, 1998.01.