Title:
X線コンピューター断層撮影装置とその投影データ収集方法
Document Type and Number:
Japanese Patent JP4500929
Kind Code:
B2
Abstract:
An X-ray computed tomograph for forming a sharp reconstructed image of a heart and a coronary artery. The diastolic phase between R-waves of an electrocardiogram is divided into a rapid inflow period, a slow inflow period, and atrial systole period. The rapid inflow period is a period during which blood rapidly flows in a ventricle, the heart moves, and collection of projection data is not suited. The slow inflow period is a period during which the movement of the heart is most quite and collection of projection data is suited. The atrial systole period is a period during which the ventricle moves when the atria contracts, and collection of projection data is hardly influenced. When a projection data collection window of the X-ray computed tomograph is 250 ms, and when the heart beat rate is less than 65/minute, the final stage of the data collection window is set at or around the peak of the P-wave. When the heart beat rate is more than 65/minute, the final stage of the 1/2 data collection window is set at or around the peak of the R-wave. Thus a two-phase system is used.
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Inventors:
Yuichi Sato
Application Number:
JP2004521190A
Publication Date:
July 14, 2010
Filing Date:
July 11, 2003
Export Citation:
Assignee:
NIHON UNIVERSITY
International Classes:
A61B6/03; A61B5/352; A61B5/366; A61B6/00
Domestic Patent References:
| JP2000262519A | ||||
| JP9024045A | ||||
| JP53123693A |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Hayashi Zouzo
Kuniaki Shimizu
Hajime Asamura
Hayashi Zouzo
Kuniaki Shimizu