Publications by authors named "Masaki Takemitsu"
Article Synopsis
- - The study examines the need for larger diagnostic catheters (like the JL5) for left coronary angiography (CAG) in patients with a dilated ascending aorta, focusing on aortic parameters that impact this decision.
- - Researchers compared two patient groups based on the catheter used (JL4 vs. JL5) and found that those needing the JL5 had longer procedures, more contrast used, and significant differences in aortic measurements.
- - Results indicated that a maximum ascending aorta area greater than 1111.2 mm is a key predictor for using the JL5 catheter, suggesting that starting with a larger catheter may improve procedures for patients with an ascending aorta diameter over 38 mm.
This study aims to evaluate the effect of pre-reconstruction process for low tube voltage computed tomography (CT) on image quality of filtered back projection (FBP) reconstruction. Small and large quality assurance water phantoms (19 and 33 cm diameter) were scanned on a third-generation dual-source CT with 70 kVp and 120 kVp at various dose levels. Image quality was assessed in terms of the noise power spectrum (NPS) and task-based transfer function (TTF).
View Article and Find Full Text PDFThis study aimed to evaluate the dose reduction potential of adding a tin filter to localizer radiographs (LR) on computed tomography (CT) examinations in both phantom and clinical studies. LRs were performed using combinations of 120 kVp and 20 mA (120/20), 100 kVp with a tin filter, and 50 mA or 20 mA (Sn100/50, Sn100/20). For the phantom experiment, entrance surface doses (ESD) of the LRs were evaluated for each protocol using an anthropomorphic phantom.
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