Freeny P C, Marks W M
AJR Am J Roentgenol. 1986 Oct;147(4):711-9. doi: 10.2214/ajr.147.4.711.
Forty-seven patients with 58 hepatic hemangiomas were studied prospectively with a dynamic bolus CT protocol (single-level or incremental scans) that included precontrast scans, rapid-sequence scanning during the IV bolus injection of 150 ml of 60% contrast agent, and delayed scans taken as long as 60 min after contrast. Three CT criteria are believed to be necessary to make a specific diagnosis of hemangioma: lesion with diminished attenuation on precontrast scan; peripheral contrast enhancement during the dynamic bolus phase of scanning; and complete isodense fill-in on delayed scans obtained up to 60 min after contrast. These CT criteria were seen in only 32 (55%) of 58 hemangiomas, making CT a relatively poor imaging technique for diagnosis.
对47例患有58个肝血管瘤的患者采用动态团注CT方案（单层或增量扫描）进行前瞻性研究，该方案包括平扫、在静脉团注150 ml 60%造影剂期间进行快速序列扫描以及造影后长达60分钟的延迟扫描。据信，做出血管瘤的明确诊断需要三个CT标准：平扫时病变密度减低；扫描动态团注期周边强化；造影后60分钟内延迟扫描完全等密度充填。这些CT标准仅在58个血管瘤中的32个（55%）中出现，这使得CT成为一种相对较差的诊断成像技术。
