SPECT liver imaging using an iterative attenuation correction algorithm and an external flood source.
SPECT liver imaging using an iterative attenuation correction algorithm and an external flood source.
复制标题
使用迭代衰减校正算法和外部洪水源进行 SPECT 肝脏成像。
DOI：
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发表时间：
1986
影响因子：
9.3
通讯作者：
W. Kowalsky
中科院分区：
文献类型：
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作者：
J. Malko;R. V. Heertum;G. T. Gullberg;W. Kowalsky
本研究介绍了将新的固有衰减校正算法纳入 SPECT 肝脏成像协议中所获得的结果。使用该方案对总共六名患者进行了评估。新算法使用在标准发射断层扫描之前获得的透射断层扫描采集，并且需要使用外部洪水源。透射断层扫描产生患者的衰减图像或图。然后衰减图作为最终固有校正算法的输入，该算法也使用来自标准发射采集的数据。六名患者的研究结果表明，该算法可以纠正衰减效应，而不会降低图像质量。在所有研究的案例中，经过衰减校正的图像比未经衰减校正获得的图像更容易解释案例。
The results obtained from the inclusion of a new intrinsic attenuation correction algorithm into a protocol for SPECT liver imaging are presented in this study. A total of six patients were evaluated with this protocol. The new algorithm uses a transmission tomographic acquisition that is obtained before a standard emission tomograph, and requires the use of an external flood source. The transmission tomograph results in an attenuation image, or map, of the patient. The attenuation map then serves as input into the final intrinsic correction algorithm, that also uses data from a standard emission acquisition. The results of the six patients studied show that the algorithm can correct for attenuation effects without degrading image quality. In all the cases studied, the attenuation corrected images made the cases easier to interpret than did the images obtained without attenuation correction.