||Takeshi Kamitani, Hidetake Yabuuchi, Yoshihide Kanemaki, Mitsuhiro Tozaki, Tetsuo Sonomura, Waka Mizukoshi, Waka Nakata, Taro Shimono, Misugi Urano, Toshiko Yamano, Fumi Kato, Megumi Kuchiki, Nobuyuki Shiragami, Hisami Yanagita, Eisuke Katsuda, Masako Kataoka, Ken Yamaguchi, Takuro Horikoshi, Tatsuya Gomi, Miwako Nozaki, Motoi Shiotani, Maki Amano, Hirokazu Saigusa, Shunichi Sadaoka, Hisashi Kamiya, Makoto Kubo, Nami Yamashita, Hidetaka Yamamoto, Hiroshi Honda, Effects of menstrual cycle on background parenchymal enhancement and detectability of breast cancer on dynamic contrast-enhanced breast MRI
A multicenter study of an Asian population, European Journal of Radiology, 10.1016/j.ejrad.2018.11.025, 110, 130-135, 2019.01, Purpose: To evaluate the effect of the menstrual cycle on BPE and cancer detectability in an Asian population. Material and methods: 266 premenopausal patients with regular menstrual cycles from 24 centers were included, and 176 of them were diagnosed by pathology as having breast cancer. Thirty-five patients were examined in the menstrual phase (days 1–4), 105 in the proliferative phase (days 5–14), and 126 in the secretory phase (days 15–30). Measurement of the following signal intensities (SIs) were obtained: breast tissue on the unaffected side on a pre-contrast image (SI1) and an early-phase image (SI2); the SIs of breast tissue on the affected side on a pre-contrast image (SI3) and an early-phase image (SI4); and the SIs of breast cancer on a pre-contrast image (SI5) and an early-phase image (SI6). We calculated the BPE ratio, i.e., (SI2– SI1)/SI1 and the cancer/background enhancement ratio (C/B) ratio, i.e., (SI6– SI5) / (SI4– SI3). The BPE was classified as minimal, mild, moderate, or marked, and the cancer detectability was classified as excellent, good, or poor independently by two radiologists. Results: The average C/B ratio was 20.1, 15.7, and 9.1 at the menstrual, proliferative, and secretory phases (p < 0.001). BPE was determined as moderate or marked in 0% and 5.4% at the menstrual phase, 10.3% and 11.0% at the proliferative phase, and 17.5% and 21.7% at the secretory phase by the two observers, respectively (p = 0.01, p = 0.01). The detectability of breast cancer was classified as poor in 0% and 0%, 1.4% and 13.0%, and 8.0% and 22.1% at the menstrual, proliferative, and secretory phases by the two observers, respectively (p = 0.07, p = 0.02). Conclusion: The menstrual phase and the proliferative phase seem to be suitable for breast MRI of Asian women..
||Kamitani Takeshi, Satoshi Kawanami, Asayama Yoshiki, Matsuo Yoshio, Yonezawa Masato, Yuzo Yamasaki, Nagao Michinobu, Yamanouchi T, Yabuuchi Hidetake, Katsumasa Nakamura, Torahiko Nakashima, Honda Hiroshi, Feeding Arteries of Primary Tongue Cancers on Intra-arterial Infusion Chemotherapy, Cardiovasc Intervent Radiol, 10.1007/s00270-015-1159-3, 39, 2, 227-232, 2016.02.
||Kamitani Takeshi, Matsuo Yoshio, Yabuuchi Hidetake, Nobuhiro Fujita, Nagao Michinobu, Satoshi Kawanami, Yonezawa Masato, Yuzo Yamasaki, Tokunaga Kitao Eriko, Makoto Kubo, Hidetaka Yamamoto, Honda Hiroshi, Differentiation between benign phyllodes tumors and fibroadenomas of the breast on MR imaging, Eur J Radiol, 83, 8, 1344-1349, 2014.08.
||Kamitani Takeshi, Matsuo Yoshio, Yabuuchi Hidetake, Nobuhiro Fujita, Nagao Michinobu, Jinnouchi Mikako, Yonezawa Masato, Yuzo Yamasaki, Tokunaga Kitao Eriko, Makoto Kubo, Hidetaka Yamamoto, Takashi Yoshiura, Honda Hiroshi, Correlations between apparent diffusion coefficient values and prognostic factors of breast cancer, Magn Reson Med Sci, 12, 3, 193-199, 2013.09.
||Kamitani Takeshi, Hatakenaka Masamitsu, Yabuuchi Hidetake, Matsuo Yoshio, Nobuhiro Fujita, Jinnouchi Mikako, Nagao Michinobu, Shirahane Kengo, Tokunaga Kitao Eriko, Honda Hiroshi, Detection of axillary node metastasis using diffusion-weighted MRI in breast cancer, Clin Imaging, 37, 1, 56-61, 2013.01.
||Kamitani T, Yabuuchi H, Matsuo Y, Setoguchi T, Sakai S, Okafuji T, Sunami S, Hatakenaka M, Ishii N, Kubo M, Tokunaga E, Yamamoto H, Honda H, Diagnostic performance in differentiation of breast lesion on digital mammograms: comparison among hard-copy film, 3-megapixel LCD monitor, and 5-megapixel LCD monitor., Clin Imaging, 35, 5, 341-5, 2011.09.
||Kamitani T, Yabuuchi H, Soeda H, Matuso Y, Okafuji T, Sakai S, Setoguchi T, Hatakenaka M, Ishii N, Honda H, Detection of breast cancer by soft-copy reading of digital mammograms: comparison between a routine image-processing parameter and high contrast parameters, Acta Radiol , 51, 1, 15-20, 2010.02.
||Kamitani T, Yabuuchi H, Soeda H, Matsuo Y, Okafuji T, Setoguchi T, Sakai S, Hatakenaka M, Ishii N, Honda H, Optimal gradation processing parameter for soft-copy reading of digital mammogram: comparison between the parameter recommended for hard-copy and other parameters, Eur J Radiol, 66, 2, 309-312, 2008.05.
||Kamitani T, Yabuuchi H, Soeda H, Matsuo Y, Okafuji T, Sakai S, Furuya A, Hatakenaka M, Ishii N, Honda H, Detection of masses and microcalcifications of breast cancer on digital mammograms: comparison among hard-copy film, 3-megapixel liquid crystal display (LCD) monitor, and 5-megapixel LCD monitor: an observer performance study, European Radiology, 17, 5, 1365-1371, 2007.05.