发明名称 |
Focused rotating slat-hole for gamma cameras |
摘要 |
gamma-ray emissions (14) are detected by a rotating, one-dimensional detector array (18). Slats of a convergent or divergent collimator (16) are mounted between detector elements. The slats are canted by an angle alpha from focusing on a focal spot (40) on a perpendicular bisector to the detector array. As a detector head (30) revolves around a longitudinal axis (36) of the subject, the head is canted (FIG. 5) to generate angularly offset data sets. Data sets with the detector array rotated to 180° opposite orientations are processed (62) to generate a first derivative data set. Parallel lines or planes (64) of the canted data sets are processed (68) to generate a second derivative data set which is backprojected (70) in accordance with the Radon transform into a three-dimensional image representation.
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申请公布号 |
US6627893(B1) |
申请公布日期 |
2003.09.30 |
申请号 |
US20010808935 |
申请日期 |
2001.03.15 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS, N.V. |
发明人 |
ZENG GENGSHENG LAWRENCE;GAGNON DANIEL |
分类号 |
G21K1/02;G01T1/161;G01T1/164;G01T1/166;G01T7/00;(IPC1-7):G01T1/166 |
主分类号 |
G21K1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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