Takaaki Ueda

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OBJECTIVE To determine whether it is possible to use bone single-photon emission tomography (SPECT) as a substitute for magnetic resonance (MR) imaging for differentiating malignant from benign vertebral compression fractures (VCFs). METHODS Ninety-seven fractures in patients who underwent both bone SPECT and MR imaging were included in our study. These(More)
The spatiotemporal spectra of a video that contains a moving object form a plane in the 3D frequency domain. This plane, which is described as the theoretical motion plane, reflects the velocity of the moving objects, which is calculated from the slope. However, if the resolution of the frequency analysis method is not high enough to obtain actual spectra(More)
We compared intermediate-weighted fast spin-echo (IW-FSE) images with intermediate-weighted fast-recovery FSE (IW-FRFSE) images in the diagnosis of meniscal tears. First, 64 patients were recruited, and the arthroscopic findings (n = 40) and image analysis (n = 19) identified 59 torn menisci with 36 patients. Both the diagnostic performance and image(More)
The spatiotemporal spectra of a movie that contains a moving object form a plane in the three-dimensional (3-D) frequency domain. This plane, which is referred to as the theoretical motion plane, reflects the velocity and calculating the slope of the moving objects. However, if the resolution of the frequency analysis method is not high enough to obtain the(More)
A movie may be represented as a three-dimensional (3-D) signal and as a spatiotemporal spectrum in a 3-D frequency domain. Most spatiotemporal spectra lie on a theoretical motion plane when an object moves at a uniform velocity in a movie. By calculating the slope of this plane, we can estimate the velocity of the moving object. However, the spatiotemporal(More)
The spatiotemporal spectra of a video that contains a moving object form a plane in the three-dimensional (3D) frequency domain. This plane, which is referred to as the theoretical motion plane, reflects the velocity, which is calculated from the slope, of the moving objects. In the present paper, we propose a high-resolution frequency analysis method,(More)
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