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Daisuke Tsurumaru Last modified date:2022.06.02

Assistant Professor / Department of Clinical Radiology, Graduate School of Medical Sciences
Kyushu University Hospital

 Reseacher Profiling Tool Kyushu University Pure
Academic Degree
Doctor of Philosophy
Country of degree conferring institution (Overseas)
Field of Specialization
Outline Activities
Research: Diagnostic radiology of gastrointestinal tract, mainly CT.
Education: Radiology and gastroenterology for medical student and medical intern.
Social activities: Gastric cancer screening program in Fukuoka.
Research Interests
  • Contrast-enhanced CT of gastric cancer
    keyword : CT, gastric cancer
  • CT colonography of colorectal cancers
    keyword : Colorectal cancer, CT colonography
Academic Activities
1. DAISUKE TSURUMARU, MITSUTOSHI MIYASAKA, YUSUKE NISHIMUTA, Asayama Yoshiki, Akihiro Nishie, Satoshi Kawanami, Minako Hirahashi, Eiji Oki, Hiroshi Honda, Differentiation of Early Gastric Cancer with Ulceration and Resectable Advanced Gastric Cancer using Multiphasic Dynamic Multidetector CT, European Radiology, 10.1007/s00330-015-3938-2, 2016.05, OBJECTIVES: Early gastric cancer with ulceration (EGC-U) mimics advanced gastric cancer (AGC), as EGC-Us and ACGs often have similar endoscopic appearance to ulceration. The purpose of this retrospective study was to determine whether multiphasic dynamic multidetector CT (MDCT) can help differentiate EGC-Us from AGCs.
METHODS: Patients with EGC-Us with ulcer stages Ul-III or IV and AGCs with tumour stages T2 to T4a were enrolled. MDCT images were obtained 40 s (arterial phase), 70 s (portal phase) and 240 s (delayed phase) after injection of non-ionic contrast material. Two readers independently measured the attenuation values of the lesions by placing regions of interest. We compared the EGC-Us and AGCs using the mean attenuation values in each phase and peak enhancement phase. We analysed the diagnostic performance of CT for differentiating EGC-Us from AGCs.
RESULTS: Forty cases (16 EGC-Us and 24 AGCs) were analysed. The mean attenuation values of the EGC-Us were significantly lower than those of the AGCs in both the arterial and portal phases (all p < 0.0001 for each reader). The peak enhancement was significantly different between the EGC-Us and AGCs for both readers (Reader 1, p = 0.0131; Reader 2, p = 0.0006).
CONCLUSION: Multiphasic dynamic contrast-enhanced MDCT can help differentiate EGC-Us from AGCs..
1. Daisuke Tsurumaru, Noriyuki Takatsu, Satohiro Kai, Eiji Oki, Kousei Ishigami, CT of gastric cancer: Should the radiologist only point out wall thickening of the stomach?, 第80回日本医学放射線学会総会, 2021.04.
2. Daisuke Tsurumaru, Yusuke Nishimuta, Toshio Muraki, Yoshiki Asayama, Hiroshi Honda, CT Gastrography for Gastric Tumors: What is the Current Role, RSNA 2019, 2018.11.
3. Daisuke Tsurumaru, Yusuke Nishimuta, Toshio Muraki, Yoshiki Asayama, Hiroshi Honda, Prediction of gastric cancer with synchronous hepatic metastasis by enhancement pattern of primary lesion using multiphasic contrast-enhanced computed tomography, European Congress of Radiology 2018, 2018.03, Purpose: To examine contrast-enhanced computed tomography (CECT) features of primary site of gastric cancers with synchronous hepatic metastasis.
Methods and Materials: One hundred eleven consecutive patients with pathologically proven advanced gastric cancers who were evaluated with CECT were enrolled. CT images were obtained 40s (arterial phase), 70s (portal phase) and 240s (delayed phase) after injection of nonionic contrast material. Eleven patients were diagnosed having hepatic metastasis at the time of diagnosis. Two radiologists in consensus determined the “peak enhancement phase” in which the lesion showed the highest attenuation value among the three phases for each case. The readers traced the entire tumor as the region of interest (ROI) of the gastric lesion, and measured the CT attenuation value for each phase. We compared the peak enhancement phase of positive hepatic metastasis group (n=11) and negative hepatic metastasis group (n=100) using Chi-square tests, and compared the CT attenuation values of the two groups in each phase using analysis of variance (ANOVA).
Results: The peak enhancement was significantly different between the two groups (p=0.0007); most of the positive hepatic metastasis cases had peak enhancement in the arterial phase. The CT attenuation values of positive hepatic metastasis cases were significantly lower than those of negative hepatic metastasis cases in the delayed phase.
Conclusion: Hepatic metastasis of gastric cancer may be predictable according to enhancement pattern of primary lesion on multiphasic CECT..
4. DAISUKE TSURUMARU, MITSUTOSHI MIYASAKA, YUSUKE NISHIMUTA, Satoshi Kawanami, Akihiro Nishie, 浅山 良樹, 平橋 美奈子, Hiroshi Honda, Dynamic Contrast-Enhanced CT of Gastric Cancers: Relationship between Enhancement Pattern and Histological Type, European Congress of Radiology, 2015.03.
Membership in Academic Society
  • Japan Gastrointestinal Virtual Reality Association
  • The Japanese Society of Gastrointestinal Cancer Screening
  • Japan Radiological Society
  • Japan Gastroenterological Endoscopy Society
Educational Activities
Educational activities;
Diagnostic radiology and gastroenterology for medical student and intern.