肾脏占位性病变的CT检查

目的：评价螺旋CT的平扫期、皮髓质期(cMP)、实质期(NP)显示肾脏占位性病变的能力。方法：螺旋cT检查。肾脏占位性病变51例，先平扫，再以3ml／s团注造影剂100ml做增强扫描，增强时分别扫描CMP(注射后25秒)和NP(注射后100秒)两期。统计各期的病灶检出率，并测定病灶的CT值。结果：51例中发现病灶70个，其中平扫期检出病灶41个(58.58％)，CMP检出病灶53个(75.71％)，NP检出病灶70个(100％)；实质性病灶在NP显著增强，而囊性病灶的cT值在各个扫描期没有差别。结论：肾脏占位性病变患者的螺旋CT检查，平扫描和CMP、NP一起使用，对病变的检出率和病灶的特征显示优于仅做其中一期检查。

CT examination of renal space-occupying lesions

Objective:To evaluate the ability of the plain scanning,corticomedullary(CMP) and nephrographic phase(NP) of spiral CT in revealling renal space-occupying lesions.Methods:Spiral CT scanning was performed in 51 cases with renal space-occupying lesions.After plain CT examination,the enhanced scanning with a 100 ml bolus injection of contrast material at 3ml/s was performed in two phases of CMP (25 s after injection) and NP(100 s after injection) respectively.The detected rate of focus was added up and the CT value of focus was measured in each phase.Results:70 foci were found in 51 cases.The detected focus in plain scanning,CMP and NP was 41(58.58%),53(75.71%) and 70(100%) respectively.The parenchymatous focus was significantly enhanced in NP,the cystic focus did not have any difference in each phase.Conclusion:The combination examination of plain scanning,CMP and NP of spiral CT for renal space-occupying lesions can fully display the detected rate and characterisic of renal foci and is superior to anyone of those three phases mentioned above.