发明名称 |
CT-IMAGE PROCESSING APPARATUS AND METHOD |
摘要 |
Provided are a CT-image processing apparatus and a method which can remove noise caused by one of a heartbeat and a breathing beat and extract only an accurate periodic motion by the other one. A CT-image processing apparatus 5 that processes projection data in which an animal is captured as a subject at each time by an X-ray CT apparatus includes a breathing beat threshold specification unit 36a to specify a lower limit of a breathing beat frequency from a feature amount waveform within a ROI for breathing beat synchronization in a series of projection data, a heartbeat threshold specification unit 37a to specify a lower limit of a heartbeat frequency from a feature amount waveform within a ROI for heartbeat synchronization in the series of projection data, a breathing beat extraction unit 36b to extract a breathing beat waveform using a band-pass filter defined by the lower limit of the breathing beat frequency and the lower limit of the heartbeat frequency. |
申请公布号 |
US2016287203(A1) |
申请公布日期 |
2016.10.06 |
申请号 |
US201615070288 |
申请日期 |
2016.03.15 |
申请人 |
Rigaku Corporation |
发明人 |
KOIKE Takafumi;MAESAWA Minoru;HARA Yukihiro |
分类号 |
A61B6/00;A61B6/03;G06T11/00 |
主分类号 |
A61B6/00 |
代理机构 |
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代理人 |
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主权项 |
1. A CT-image processing apparatus that processes projection data in which an animal is captured as a subject at each time by an X-ray CT apparatus, comprising:
a breathing beat threshold specification unit configured to specify a lower limit of a breathing beat frequency from a feature amount waveform within a ROI for breathing beat synchronization in a series of projection data; a heartbeat threshold specification unit configured to specify a lower limit of a heartbeat frequency from a feature amount waveform within a ROI for heartbeat synchronization in the series of projection data; and a breathing beat extraction unit configured to extract a breathing beat waveform using a band-pass filter defined by the lower limit of the breathing beat frequency and the lower limit of the heartbeat frequency. |
地址 |
Tokyo JP |