Hisashi Usami

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The purpose of this study was to assess the influence of liquid crystal display (LCD) monitors on the detectability of diffuse pulmonary diseases depicted on chest radiographs by comparing them with a high-resolution cathode ray tube (CRT) monitor. A group of 17 radiologists interpreted 87 soft-copy images on LCD monitors with pixel arrays of 1024 × 1280,(More)
To confirm that the dimming luminance change in the CRT monitor will have a detrimental effect on diagnostic performance, we performed the four-alternative forced choice experiments on the CRT monitor with the 11 luminance conditions simulating CRT degraded by long-term usage. Six radiologists and one pulmonary physician performed a detection task for(More)
Mandibular movements in 7 normal dentulous subjects during lateral and protrusive excursions were studied to investigate the effects of the clinical use of articulating paper on mandibular paths. Mandibular movements with or without the intraoral articulating paper (thickness: 35 microns) were detected as the lower incisal point displacement and were(More)
RATIONALE AND OBJECTIVES To investigate how changes in luminance affect the detection accuracy of radiologists viewing chest radiograph images on high-resolution CRT monitors. MATERIALS AND METHODS Thirteen radiologists performed a detection task for 11 chest radiograph images with simulated nodules on a monitor with 11 luminance conditions (the maximum(More)
UNLABELLED Imaging with (18)F-FDG PET/CT is able to reveal vascular inflammation, and several studies have shown that increased (18)F-FDG uptake in carotid artery plaques can qualify the degree of atherosclerotic inflammation. However, clinical assessment of acute aortic dissection (AAD) by PET/CT remains largely unexplored. This study aimed to investigate(More)
The purpose of this study was to elucidate the adaptation in masticatory function by changing the cusp angle of the natural dentition of one person using a metal splint. During each experiment mandibular movements and EMG were recorded during a period of weeks. While chewing raisins as test food, mandibular movements as measured by the lower incisal point(More)
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