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- Osamu Tokuda, Yuko Harada, Takaaki Ueda, Yona Ohishi, Naofumi Matsunaga
- Nuclear medicine communications
- 2011

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)

- Takaaki Ueda, Kenta Fujii, Shigeki Hirobayashi, Toshio Yoshizawa, Tadanobu Misawa
- IEEE Transactions on Image Processing
- 2013

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)

- Osamu Tokuda, Yuko Harada, +5 authors Naofumi Matsunaga
- Japanese Journal of Radiology
- 2012

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)

- Takaaki Ueda, Shigeki Hirobayashi
- 2010 IEEE International Conference on Acoustics…
- 2010

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)

- Takaaki Ueda, Shigeki Hirobayashi
- 2009 2nd International Congress on Image and…
- 2009

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)

- Kenta Fujii, Takaaki Ueda, Shigeki Hirobayashi, Toshio Yoshizawa, Tadanobu Misawa
- 2011 4th International Congress on Image and…
- 2011

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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