Ohashi I, Ina H, Gomi N, Himeno Y, Okada Y, Hanafusa K, Suzuki S, Shibuya H
Department of Radiology, Tokyo Medical and Dental University, School of Medicine, Japan.
Radiology. 1995 Jul;196(1):245-9. doi: 10.1148/radiology.196.1.7784576.
To determine the prevalence and possible cause of pseudolesions in the left hepatic lobe around the falciform ligament at hepatic helical computed tomography (CT).
Portal venous-dominant CT scans of 472 consecutive patients were reviewed. CT of the left hepatic lobe was performed after injection of contrast material into the portal vein in 73 patients, the hepatic artery in 32, and the internal thoracic artery in four. The scans were compared with those obtained at helical CT, and the findings were analyzed.
Pseudolesions were seen on 64 (14%) of 472 helical CT scans and correlated well (accuracy, 96%) with portal perfusion defects. They were not more enhanced than the surrounding liver parenchyma at CT arteriography with hepatic artery injection but were enhanced in two patients at CT arteriography with internal thoracic artery injection.
Pseudolesions are caused by portal perfusion defects and may receive an aberrant blood supply.
确定肝脏螺旋计算机断层扫描（CT）时镰状韧带周围左肝叶假病灶的发生率及可能病因。
回顾了连续472例患者以门静脉为主的CT扫描。73例患者经门静脉注射对比剂后进行左肝叶CT扫描，32例经肝动脉注射，4例经胸廓内动脉注射。将这些扫描结果与螺旋CT扫描结果进行比较，并对结果进行分析。
在472例螺旋CT扫描中有64例（14%）出现假病灶，与门静脉灌注缺损相关性良好（准确率96%）。经肝动脉注射对比剂的CT动脉造影显示，假病灶强化程度不超过周围肝实质，但在2例经胸廓内动脉注射对比剂的CT动脉造影中假病灶有强化。
假病灶由门静脉灌注缺损引起，可能接受异常血供。
