Abstract：Objective: Through the comparison between planar bone scan and SPECT/CT sagittal images, to analysis the relationship between the sacral increased radioactivity without lesion on planar bone scan and the physiological position of the sacrum. Methods: A retrospective study was performed on a total of 93 cases without sacral organic lesions, who underwent whole body planar bone scan and lumbosacral SPECT/CT on the same day. These cases were divided into concentration group and non-concentration group according to the planar bone scan image. The angle between the lower edge of the first sacral vertebra and scan bed surface was measured on SPECT/CT sagittal image. Then, an analysis was performed to evaluate if there was significant difference between the two groups. Results: Ninety-three cases were divided into concentration group of 26 cases, the angle was 80.6°±3.0°, non-concentration group of 67 cases, the angle was 64.5°±5.2°. There was significant difference between the two groups(t=14.917, P=0.000). Conclusion: Excessive inclination of the lower edge of the first sacral vertebra is the real reason of the increased radioactivity in sacrum without lesion on planar bone scan.
李 伟，李 雯，张林启，张汝森. 平面骨显像骶骨非病灶性放射性浓集影与第1骶椎下缘倾斜角度值间的相关性分析[J]. 中国临床医学影像杂志, 2018, 29(10): 740-743.
LI Wei, LI Wen, ZHANG Lin-qi, ZHANG Ru-sen. The relation between the increased radioactivity in the sacrum without lesion on planar bone scan and the tilt angle of the first sacral vertebra. JOURNAL OF CHINA MEDICAL IMAGING, 2018, 29(10): 740-743.
