Hirohito Kan Yuta Eguchi Takahiro Tsuchiya Takuto Kondo Yuto Kitagawa Yuji Mekata Hiroshi Fukuma Ryoya Yoshida Harumasa Kasai Hiroshi Kunitomo Yasujiro Hirose Yuta Shibamoto
Physics in medicine and biology 64(6) 06NT01 2019年3月 [査読有り]
MR-only simulations provide pseudo-CT images which are segmented into 5 kinds of tissues from DIXON-based images. However, it is difficult to register pseudo-CT images to cone-beam CT (CBCT) images collected for image-guided radiation therapy (IGR...
Hirohito Kan Nobuyuki Arai Masahiro Takizawa Kazuyoshi Omori Harumasa Kasai Hiroshi Kunitomo Yasujiro Hirose Yuta Shibamoto
Magnetic resonance imaging 52 94-101 2018年10月 [査読有り]
PURPOSE: We developed a non-regularized, variable kernel, sophisticated harmonic artifact reduction for phase data (NR-VSHARP) method to accurately estimate local tissue fields without regularization for quantitative susceptibility mapping (QSM). ...
Hirohito Kan Nobuyuki Arai Harumasa Kasai Hiroshi Kunitomo Yasujiro Hirose Yuta Shibamoto
Magnetic resonance imaging 42 37-42 2017年10月 [査読有り]
PURPOSE: To evaluate the accuracy of susceptibility estimated from the principles of echo shifting with a train of observations (PRESTO) sequence using a 1.5T MRI system, we conducted experiments on the human brain using the PRESTO sequence and co...
Hirohito Kan Harumasa Kasai Nobuyuki Arai Hiroshi Kunitomo Yasujiro Hirose Yuta Shibamoto
Magnetic resonance imaging 34(7) 1026-33 2016年9月 [査読有り]
An effective background field removal technique is desired for more accurate quantitative susceptibility mapping (QSM) prior to dipole inversion. The aim of this study was to evaluate the accuracy of regularization enabled sophisticated harmonic a...
Radiological physics and technology 8(2) 320-30 2015年7月 [査読有り]
We devised a new noise filtering method to reduce the noise in the line spread function (LSF) for presampled modulation transfer function (MTF) analysis with the edge method. A filter was designed to reduce noise effectively using a position-depen...
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