【摘要】 目的 探讨多层螺旋CT血管造影（MSCTA）对腹部巨大肿块定位定性的诊断价值。 方法 收集2005年6月-2009年12月98例腹部巨大肿块，作MSCTA检查，观察供血动脉来源和肿块与血管关系。 结果 98例肿块发现有主要供血动脉76例，其中恶性肿块69例，血管受侵改变51例。 结论 由于MSCTA快捷、无创、经济、方便、空间分辨率高等优点，对腹部巨大肿块定位定性有较高诊断价值。【Abstract】 Objective To investigate the diagnostic value of multislice CT angiography (MSCTA) to abdominal huge mass from June 2005 to December 2009. The relation among blood vessel and supply origin and tumor was analyzed. Methods MSCTA was performed in 98 cases with abdomenial huge mass. Results The feeding artery of mass was discovered in 76 cases, in which malignant tumors were confirmed in 69 cases, the vessels were encroached on in 51 cases. Conclusion MSCTA may be of high value to diagnose abdominal huge mass because of noninvasiveness, convenience, and high resolution.
【Abstract】 Objective To explore the methods and appl ication value of surface shaded display (SSD) and multiplanarreconstruction (MPR) in the evaluation of acetabular morphology in patients with developmental dysplasia of the hip (DDH) before total hip arthroplasty (THA). Methods From October 2003 to November 2006, 17 patients (3 males and 14 females, aging from 35 years to 61 years) with osteoarthritis secondary to DDH were scanned with spiral CT preoperatively. According to the Crowe standard, 19 dysplasia hips were classified as type I in 4 hips, type II in 9 hips, type III in 6 hips. The obtained hip CT data were developed with SSD and MPR to observe spational position and bone stock of the acetabula. Results The dislocated extent was 25%-89% in these dysplasia hips according to the Crowe method and their sharp angles all exceeded 45°. Bone defect occurred to each of the acetabula, among which it was located in anterosuperior acetabulum in 5 hips, in superolateral acetabulum in 11 hips and in posterosuperior acetabulum in 3 hips. The hip images made with MPR showed that the minimum thickness of the medial wall of acetabula ranged from 2.0 mm to 10.9 mm. Among 15 unilateral dysplasia patients, the opening difference anddepth difference between the dysplasia acetabulum and the contralateral one ranged from 2.7 mm to 19.1 mm and from 2.3 mm to 13.1 mm, respectively. Conclusion SSD and MPR of spiral CT are effective methods in evaluating acetabular morphology preoperation and contribute to intraoperative acetabular reconstruction in patients with DDH performed THA.
【摘要】 目的 探索腹部淋巴结结核在多层螺旋CT（multi-layered screw CT，MSCT）扫描中CT值动态变化规律。 方法 2007年1月—2010年8月，收集经诊断性治疗或诊断性活检确诊的17例患者腹部淋巴结结核，记录肿大淋巴结数量、大小、位置，测量兴趣淋巴结中心、次中心、边缘部平扫及注药后20、60、120、180、360 s的CT值。 结果 共检测出肿大淋巴结269个，主要分布在肝十二指肠韧带、门腔间隙、肝胃韧带、肠系膜根部和腰3平面以上腹主动脉周围，CT值（49.2±13.6） Hu；强化淋巴结215个，选择21个兴趣淋巴结，测得注药20、60、120、180、360 s后强化区CT值分别为（67.7±15.3）、（75.2±14.6）、（76.3±18.7）、（75.6±13.4）、（72.6±17.4） Hu。 结论 腹部淋巴结结核动态CT值表明动脉期明显强化，静脉期及延时扫描强化值维持在动脉期水平呈平台样改变，反映了淋巴结结核慢性感染的病理状态。【Abstract】 Objective To explore the changing rule of dynamic CT values for abdominal lymph node tuberculosis in multi-layered screw CT (MSCT) multiphasic scanning. Methods Between January 2007 and August 2010, 17 cases of abdominal lymph node tuberculosis confirmed by diagnosis treatment or diagnosis biopsy were retrospectively analyzed. The quantity, size and position of the lymph nodes were recorded, and CT plain scanning values of the interested lymph node center, subcenter, and the margin of the node, and the CT values 20, 60, 120, 180 and 360 seconds after drug administration were also measured. Results Enlargement was found in 269 lymph nodes which were mainly distributed in the liver duodenum ligament, the gate cavity gap, the hepatogastric ligament, the mesentery root and the nodes in retroperitoneal space above the third lumbar vertebra. The average CT value was (49.2±13.6) Hu. A total of 215 lymph nodes had strengthened manifestations, and 21 interested lymph nodes were chosen for the study. The average CT values for lymph nodes with strengthened manifestations 20 ,60, 120, 180, and 360 seconds after drug administration were respectively (67.7±15.3), (75.2±14.6), (76.3±18.7), (75.6±13.4), and (72.6±17.4) Hu. Conclusion Dynamic CT value of abdominal lymph node tuberculosis shows a strengthening in the arterial phase, and the values in the the venous phase and the delayed phase maintain at the arterial phase level, and do not change, which indicates a pathological state of chronic infection of the lymph node tuberculosis.