2026-03-10T13:24:22Z https://mdu.repo.nii.ac.jp/oai

oai:mdu.repo.nii.ac.jp:00000077 2023-06-19T08:46:18Z 1:17:20

角化嚢胞性歯原性腫瘍の1例のMagnetic resonance (MR)画像 : MR imaging (MRI)の信号強度について Magnetic resonance (MR) image of case of keratocystic odontogenic tumor : MR imaging signal intensity 内田, 啓一 三木, 学 吉成, 伸夫 田口, 明 角化嚢胞性歯原性腫瘍 MRI 信号強度 application/pdf X-ray computed tomography (CT) and magnetic resonance imaging (MRI) are superior to plain x-ray images in evaluating the 3D morphology, the precise internal structure and the tissue component of the lesions. MRI signal intensity clearly represents the tissue component of the lesions in comparison with x-ray CT. Recently, new generation fat saturation system, IDEAL (Iterative Decomposition of water/fat using Echo Asymmetry and Leastsquares estimation), has been developed. Compared to the previous systems such as the chess or STIR (short T1 inversion recovery), it is likely that IDEAL images may reflect true tissue components of the lesions. We report the IDEAL MRI signal intensity of a case of keratocystic odontogenic tumor (KCOT) that affected the left mandible of 67-year-old male. Characteristic findings were obtained on T1-weighted image and T2-weighted IDEAL water image. The signal intensity of internal tissue component of our case was homogeneously intermediate on T1 weighted image and heterogeneously low to high with a peripheral high signal band on T2-weighted IDEAL water image. IDEAL system may be useful modality for distinguishing KCOT from other similar lesions like ameloblastoma. 松本歯科大学学会 2010-12-31 jpn journal article VoR https://mdu.repo.nii.ac.jp/records/77 AN00232590 0385-1613 松本歯学 36 3 214 219 https://mdu.repo.nii.ac.jp/record/77/files/matsumoto_shigaku_36-03-04.pdf application/pdf 1.5 MB 2012-05-22