McGehee M, Kier R, Cohn S M, McCarthy S M
Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT.
J Comput Assist Tomogr. 1993 May-Jun;17(3):410-3. doi: 10.1097/00004728-199305000-00014.
We compared the ability of MRI and CT to detect and characterize abdominal visceral injury. Seven patients with contrast-enhanced abdominal CT interpreted as showing definite (five patients) or possible (two) solid organ injury following blunt abdominal trauma were referred for abdominal MRI with a mean interval of 3 days between modalities. T1-weighted and T2-weighted spin echo sequences were obtained in all patients. Gradient-recalled echo (GRE) sequences (22-25/12-13/60 degrees flip angle) were obtained in five cases. Both CT and MR allowed detection of complex splenic lacerations in two patients and complex hepatic injuries in three other patients. A sixth patient had subtle periportal hypodensity noted on CT which was not detected prospectively on MRI. One patient had a right adrenal hematoma detected on MRI but not on CT. Relative lesion conspicuity and extent were judged equal on CT and T2-weighted imaging. The T1-weighted and GRE imaging were judged inferior to CT. We conclude that MRI offers no significant advantage over CT for the routine evaluation of acute abdominal trauma.
我们比较了MRI和CT检测及判定腹部内脏损伤的能力。7例腹部钝性外伤后经增强腹部CT检查判定为明确（5例）或可能（2例）存在实性器官损伤的患者被转诊进行腹部MRI检查，两种检查方式的平均间隔时间为3天。所有患者均进行了T1加权和T2加权自旋回波序列检查。5例患者进行了梯度回波（GRE）序列（翻转角为22 - 25/12 - 13/60度）检查。CT和MR均检测到2例患者存在复杂性脾裂伤，另外3例患者存在复杂性肝损伤。第6例患者CT显示门静脉周围有轻微低密度影，而MRI未前瞻性检测到。1例患者MRI检测到右侧肾上腺血肿，CT未检测到。CT和T2加权成像判定相对病变的清晰度和范围相当。T1加权成像和GRE成像判定不如CT。我们得出结论，在急性腹部创伤的常规评估中，MRI相对于CT没有显著优势。
