肝脓肿周围一过性节段强化动态CT表现及其临床意义

本文对肝脓肿周围一过性节段强化动态CT表现及其在抗炎治疗随访中的临床意义作一初步探讨 ,并结合文献探讨其病理基础。1　材料与方法从 2 0 0 1年 5月至 2 0 0 2年 3月间共收集到 5例肝脓肿 ,其中男 4 ,女 1例 ,年龄范围 33～ 5 2岁 (平均 4 3.5岁 )。 5例患者有发热、腹痛及白细胞计数增高 ,1例患者有小肠坏死切除术病史。 5例患者中 1例采用SiemensCR常规CT行改良动态增强(患者以 3ml/s速率团注对比剂 10 0ml,于开始注药后 2 5s嘱患者屏气 ,依平扫确定病灶的部位以 10mm层厚 ,10mm间隔扫 3个层面 (2s一层 ,间隔 2s) ,然后嘱患者呼吸 1…

Manifestation of Transient Segmental Enhancement Surrounding Hepatic Abscesses at Dynamic CT and Its Clinical Significance

Objective To describe the manifestation of transient segmental enhancement surrounding hepatic abscesses on dymamic CT,to study its cause and i clinical significance in diagnosis and follow up. Methods Dynamic CT was performed in five patients with hepatic abscess. Four patients underwent follow-up dynamic CT. Results Twenty-two abscesses were detected in the five patients on dynamic CT. Transient segmental enhancement was observed surrounding fourteen lesions (62.5%). It appeared as wedge-shaped or segmental enhancement surrounding he hepatic abscesses on early phase (arterial dominate phase)and was invisible on late phase (portal vein dominate phase).On follow-up dynamic CT after antibiotic therapy,transient segmental enhancement disappeared in all abscesses. It is caused by inflammary stenosis of portal view with in the portal tract. Conclusion Transient segmental enhancement can be observed surrounding hepatic abscesses on dynamic CT,and decreases or disappears after aibiotic therapy,which is caused by a reduction of portal flow and a compensatory in crease of arterial in flow resulting from inflammation of the portal tracts. It is useful sign in diagnosing and assessing the effice of antibiotic therapy.