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目的:评价螺旋CT三期扫描,使用370mg I/ml高浓度碘对比剂联合低剂量扫描技术,结合多平面重建在肝脏占位鉴别诊断中的价值。材料与方法:选择肝占位40例,使用碘普罗胺370对比剂(碘浓度370mg I/ml,对比剂剂量为85ml)、管电压100KV,应用16排西门子螺旋CT三期增强扫描,部分行多平面重建,以观察肝占位三期强化的方式和特征。结果:40例肝占位(16例为原发性肝ca,10例肝血管瘤,5例肝转移瘤,1例肝腺癌,6例肝硬化结节,2例肝脓疡),螺旋CT三期扫描是肝占位鉴别诊断的最佳方式,能充分反映病灶的血供特征。结论:16排CT三期扫描及后处理技术联合低剂量高浓度碘对比剂可鉴别不同肝占位的病变特征及其与周围组织的关系,可以获得满意的肝脏血管成像图像,同时降低辐射剂量和对比剂的不良反应及减少对比剂的用量。
OBJECTIVE: To evaluate the value of multiplanar reconstruction in the differential diagnosis of liver space by using three-phase spiral CT scans with 370 mg I / ml high iodine contrast agent combined with low-dose scanning technique. MATERIALS AND METHODS: Forty-four patients were selected with iopromide 370 contrast agent (iodine concentration of 370 mg I / ml, contrast agent dose of 85 ml) and tube voltage of 100 kV. Sixteen rows of three-phase enhanced spiral CT scans were performed. Multiplanar reconstruction to observe the three phases of liver occupancy enhancement methods and characteristics. Results: 40 cases of hepatic tumor (16 cases of primary hepatic caecum, 10 cases of hepatic hemangioma, 5 cases of hepatic metastases, 1 case of hepatocellular carcinoma, 6 cases of hepatic cirrhosis and 2 cases of liver abscess), spiral CT three-phase scan is the best way to differential diagnosis of liver space, can fully reflect the lesion’s blood supply characteristics. Conclusion: Three-phase CT scan and post-processing technique combined with low dose and high concentration of iodine contrast agent can identify lesion characteristics of different liver masses and their relationship with surrounding tissues, and can obtain satisfactory images of liver angiography while reducing radiation dose And contrast agent adverse reactions and reduce the amount of contrast agent.