Malko J A, Gullberg G T, Kowalsky W P, Van Heertum R L
J Nucl Med. 1985 Feb;26(2):194-200.
We discuss the basic features of a count-based algorithm for attenuation-corrected volume determination, for use with planar gamma camera images. The attenuation correction is arrived at by combining the results of two 180 degrees opposed images with a transmission image obtained with an external flood source. A sample of the imaged radioactive volume is used to convert the attenuation-corrected count to an absolute volume. The algorithm is best suited to the measurement of small to medium-sized volumes of uniform activity, such as are encountered in cardiac blood-pool imaging.
我们讨论一种基于计数的算法的基本特征，该算法用于通过平面γ相机图像进行衰减校正的体积测定。通过将两个180度对置图像的结果与使用外部泛源获得的透射图像相结合来实现衰减校正。成像放射性体积的样本用于将经衰减校正的计数转换为绝对体积。该算法最适合测量均匀活性的中小体积，如在心脏血池成像中遇到的情况。
