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Your search keyword '"Takemori, Daichi"' showing total 9 results
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9 results on '"Takemori, Daichi"'

2. Finite Time Span of High-intensity Signal on T1-weighted Magnetic Resonance Imaging Produced by a Human Blood Clot Using a Circulating Vessel Phantom System

Author

Ehara, Shoichi, Matsumoto, Kenji, Kimura, Daisuke, Takemori, Daichi, Yamada, Eiji, Ichida, Takao, and Yoshiyama Minoru

Subjects
Atherosclerotic plaque, Magnetic resonance imaging, Phantom, Thrombosis, Coronary artery
Abstract

Background : Following the introduction of non-contrast T1-weighted imaging (T1WI) in magnetic resonance imaging, using the inversion-recovery gradient-echo sequence, many researchers have shown that high-intensity signals (HISs) in carotid and coronary arterial walls indicate the presence of intraplaque hemorrhage or intracoronary thrombus containing methemoglobin. However, the time span of HISs generated by thrombus remains unknown. The aim of this study was to image a circulating vessel phantom with T1WI to determine if flow disturbance causes artifacts, such as a HIS and to perform serial observations of a human blood clot....

Published
2020

9. Evaluation of Fat Suppression of Diffusion-weighted Imaging Using Section Select Gradient Reversal Technique on 3 T Breast MRI.

Author

Takemori D, Kimura D, Yamada E, and Higashida M

Subjects
Aged, Diffusion Magnetic Resonance Imaging instrumentation, Female, Humans, Image Processing, Computer-Assisted methods, Middle Aged, Software, Breast diagnostic imaging, Diffusion Magnetic Resonance Imaging methods, Radiographic Image Enhancement methods
Abstract

This study evaluates fat suppression of diffusion-weighted imaging (DWI) using section select gradient reversal (SSGR) technique in clinical images on 3 T breast MRI. A total of 20 patients with breast cancer were examined at a Philips Ingenia 3 T MRI. We acquired DWI with SPAIR, SSGR-SPAIR, STIR, and SSGR-STIR. We evaluated contrast between the fat region and lesion, the coefficient of variance (CV) of the fat region and the apparent diffusion coefficient (ADC) of normal breast tissue and lesion. The contrast between the fat region and lesion was improved with SSGR technique. The CV of the fattest region did not have any significant difference in SPAIR technique (p>0.05), but it was significantly decreased in the STIR technique using SSGR technique (p<0.05). Positive correlation was observed in ADC value between SPAIR and other fat suppression techniques (SSGR-SPAIR, STIR, SSGR-STIR). DWI using SSGR technique was suggested to be effective on 3 T breast MRI.

Published
2016
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