Nilsson H, Wadström J, Andersson L G, Raland H, Magnusson A
Department of Oncology, Radiology and Clinical Immunology, Section of Radiology, Uppsala University, Uppsala, Sweden.
Acta Radiol. 2004 Jul;45(4):474-80. doi: 10.1080/02841850410005282.
To develop and evaluate a method of calculating split renal function from computed tomography (CT) images based on the assumption that the accumulation of contrast medium is proportional to the renal function, and to compare the results with the renogram.
The study comprised a retrospective analysis of CT images and renograms from previous donors. Twenty-seven potential renal donors were studied using a technique for measuring the area and mean attenuation of the separate CT slices, and for calculating the volume and total attenuation of the whole kidney.
Correlation between CT and renography was moderate (r = 0.43), but the range of results was narrow. The ratio between the two kidneys was more even with CT (50 +/- 2.1%) than with the renogram (48 +/- 2.9%) (right kidney), and the mean difference between the two methods was 3 +/- 2.3 percentage points.
The renogram can be replaced using calculations from the CT examination in estimating split renal function in potential renal donors.
基于造影剂蓄积与肾功能成正比这一假设，开发并评估一种从计算机断层扫描（CT）图像计算分肾功能的方法，并将结果与肾图进行比较。
该研究包括对既往供体的CT图像和肾图进行回顾性分析。使用一种测量单独CT切片面积和平均衰减，并计算整个肾脏体积和总衰减的技术，对27名潜在肾供体进行了研究。
CT与肾造影之间的相关性中等（r = 0.43），但结果范围较窄。CT显示的两肾比率（右肾为50 ± 2.1%）比肾图（48 ± 2.9%）更均匀，两种方法之间的平均差异为3 ± 2.3个百分点。
在评估潜在肾供体的分肾功能时，肾图可被CT检查计算结果所替代。
