碘-131肾图像中由于锝-99m光子的符合求和产生的伪影。
Artifacts in iodine-131 renal images due to coincidence summing of technetium-99m photons.
作者信息
Harris C C, Wilkinson R H, Schuler F R
出版信息
Radiology. 1983 Feb;146(2):505-7. doi: 10.1148/radiology.146.2.6849100.
Abstract
Technetium-99m gamma camera images of kidneys produced with an iodine-131 energy window showed "ghosts" over and between the kidneys and between the kidneys and the bladder. The cause was coincidence summing at 281 keV due to a high 99mTc counting rate. In older model cameras careful peaking with a proper energy window reduces this effect; more recently developed cameras with pileup rejection circuits do not have this problem.
摘要
使用碘 - 131能量窗生成的锝 - 99m肾脏γ相机图像显示，在肾脏上方、肾脏之间以及肾脏与膀胱之间出现了“重影”。原因是由于高锝 - 99m计数率，在281 keV处发生了符合相加。在较旧型号的相机中，通过适当的能量窗仔细调峰可减少这种效应；最近开发的带有堆积排斥电路的相机则不存在这个问题。
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