Local threshold for segmented attenuation correction of PET imaging of the thorax

Local threshold for segmented attenuation correction of PET imaging of the thorax
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胸部 PET 成像分段衰减校正的局部阈值

DOI:
10.1109/nssmic.1993.373615
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发表时间:
1993
期刊:
1993 IEEE Conference Record Nuclear Science Symposium and Medical Imaging Conference
影响因子:
--
通讯作者:
W. Digby
W. Digby
中科院分区:
--
文献类型:
--
作者:
M. Xu;W. K. Luk;P. D. Cutler;W. Digby

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分段衰减校正技术的局部阈值已开发用于使用短(2-3 分钟)注射后透射扫描的正电子发射断层扫描。该技术在局部直方图上实现了最佳阈值方法,以在传输图像上获得伪解剖分割。衰减系数的理论值被分配给相应的解剖区域。使用通过前投影分段传输图像计算的衰减校正因子来重建发射图像。使用这种技术研究体模和临床心脏图像。已发现该技术与标准方法(15 分钟,注射前传输扫描)线性相关,减少了最终发射图像中的噪声,消除了从传输扫描中减去发射数据的过程,减少了扫描时间并提高了患者吞吐量。<<ETX>>
Local threshold for segmented attenuation correction technique has been developed for positron emission tomography using short (2-3 minutes) post-injection transmission scans. The technique implements an optimal threshold method on localized histograms to get pseudo-anatomic segmentation on transmission images. Theoretical values of attenuation coefficient are assigned to correspondent anatomic regions. Emission images are reconstructed using attenuation correction factors computed by forward-projecting segmented transmission images. Phantoms and clinical cardiac images are studied using this technique. The technique has been found linearly correlated with the standard method (15 minutes, pre-injection transmission scans), reducing noise in the final emission Images, eliminating process for substraction emission data from transmission scan, cutting down scan time and increasing patient throughput.<<ETX>>
在正电子发射断层扫描中使用计数限制传输数据进行衰减校正。
DOI: --
发表时间: 1993
期刊: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子: --
作者:
Meikle,SR;Dahlbom,M;Cherry,SR
通讯作者: Cherry,SR