采用CT或MRI测量肿瘤大小与术后肿瘤实际大小比较的研究  

Evaluation of the size of renal tumor by CT or MRI

作　　者：张志强[1] 李孟云[1] 

机构地区：[1]广东省梅州市人民医院,514031

出　　处：《中国医学创新》2010年第24期106-108,共3页Medical Innovation of China

摘　　要：目的比较CT或MRI测量与手术后切除的肿瘤的大小和重量,计算适当的转换系数,建立二者的联系。方法收集60例进行部分肾脏切除手术的患者资料,术前采用CT或者MRI评估肿瘤大小(CT组,n=30;核磁共振组,n=30),术后(n=60)再测量肾脏切除标本的体积和重量。CT和MRI测量使用专用的软件,并计算转换系数。结果手术切除后实际测量的肿瘤重量/体积:CT组结果测量8.55 g/8.52 ml;核磁共振成像测量结果 :8.72 g/8.60 m1。采用影像学技术计算出的肿瘤大小:CT组9.82 ml,核磁共振成像11.14 ml。CT或者MRI测量得到的肿瘤的体积与切除后肿瘤实际体积和重量呈明显正相关。相关系数为CT组:r=0.88(体积),r=0.89(重量);MRI组:r=0.95(体积),r=0.92(重量)。换算系数为CT:0.85,MRI:0.78。结论 CT或MRI能够准确计算所要切除的肿瘤的重量和大小,可以为肿瘤切除术进行很好的术前评估,并且在利用CT和MRI对肿瘤的评估中,以CT系数为0.85,核磁共振系数为0.78作为换算系数最适合。Objective To compare virtual volume to intraoperative volume and weight measurements of resected renal tumor specimen and calculate appropriate conversion factors to reach better correlation. Methods Preoperative （ CT - group, n = 30 ; MRI - group, n = 30） imaging was performed in 60 patients undergoing Partial nephrectomy. Intraoperative volume and weight of the resected renal tumor was measured. Virtual volume measurements were performed using dedicated software. Conversion factors were calculated. Results Mean intraoperative resection weight/volume： CT： 8.55 g/8.52 ml; MRI： 8.72 g/8.60 ml. Virtual resection volume： CT： 9.60 g; MRI： 11.12 g. Strong positive correlation between intraoperative and virtual measurements, mean of both readers ： CT： r = 0. 88 （volume） , r = 0.89 （weight） ; MRI ： r = 0. 95 （volume） , r = 0. 92 （weight）. Conversion factors 0. 85 （CT） , 0. 78 （MRI）. Conclusion CT - or MRI - based volumetry of reseeted renal tumor specimen is accurate and recommended for preoperative planning. A conversion of the result is necessary to improve in- traoperative and virtual measurement correlation. We found 0.85 for CT - and 0. 78 for MRI - based volumetry themost appro- priate conversion factors.

关 键 词：肾细胞癌 CT MRI 肾肿瘤切除术 转换系数 

分 类 号：R737.11[医药卫生—肿瘤]