Keiichi Nishikawa

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Development of multi-detector row computed tomography (MDCT) has enabled three-dimensions (3D) scanning with minute voxels. Minute voxels improve spatial resolution of CT images. At the same time, however, they increase image noise. Multi-planar reconstruction (MPR) is one of effective 3D-image processing techniques. The conventional MPR technique can(More)
Evaluation of swallowing has been made possible by cine-Magnetic resonance (MR) imaging with high time resolution. However, the spatial resolution in cine-MR imaging remains inadequate for the detection of anatomical structures. Therefore, it is necessary to refer to static MR images in conjunction with cine-MR imaging. The aim of this study was to(More)
The performance of the CT scanner "TCT-700S" (Toshiba Medical), including noise, spatial and contrast resolution, and exposure, was evaluated. Noise increased as the slice thickness decreased. No matter what the slice thickness, noise was great when the product of tube current and scan speed (described by mAs in the following sentences) was small.(More)
The performance of the Rotate/Rotate CT scanner "TCT-700 S" (Toshiba) was evaluated on the basis of the item entitled "User's initial acceptance tests (phase II)," set forth in "Standard of performance evaluation for X-ray computed tomography (second recommendation)" proposed by Takenaka et al. (1982). This report describes measurements for noise, contrast(More)
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