Mudge C S, Healey T T, Atalay M K, Pezzullo J A
Department of Diagnostic Imaging, Rhode Island Hospital, 593 Eddy Street, Providence, RI 02903, USA.
ISRN Radiol. 2012 Nov 28;2013:729271. doi: 10.5402/2013/729271. eCollection 2013.
Purpose. The purpose of this study was to evaluate the feasibility of detecting pulmonary emboli utilizing noncontrast magnetic resonance imaging techniques in patients with known pulmonary embolism. Materials and Methods. Eleven patients were enrolled in a study to evaluate right ventricular function by cardiac MRI in patients diagnosed with acute pulmonary embolism on CT pulmonary angiogram. Cardiac MRI was performed as soon as possible following pulmonary embolism detection. Two independent observers reviewed the precontrast portion of each MRI, scoring right, left, and lobar arteries as positive or negative for PE. The CTs were reviewed and interpreted in the same manner. Results. MRI was obtained on average of 40 hours after the CT. Forty-eight vessels were affected by PE on CT, 69% of which were identified on MRI. All eight pulmonary emboli located in the right or left pulmonary arteries were detected on MRI. Of the 15 pulmonary emboli that were not detected on MRI, 7 were subsegmental, 6 were segmental, and 2 were located in a branch not included in the MRI field of view. Conclusions. Most pulmonary emboli detected on CT were identified on noncontrast MRI, even though our MRI protocol was not optimized for pulmonary artery visualization.
目的。本研究的目的是评估利用非增强磁共振成像技术在已知患有肺栓塞的患者中检测肺栓塞的可行性。材料与方法。11名患者参与了一项研究，通过心脏磁共振成像评估经CT肺动脉造影诊断为急性肺栓塞患者的右心室功能。在检测到肺栓塞后尽快进行心脏磁共振成像。两名独立观察者对每个磁共振成像的对比前部分进行评估，将右、左和叶动脉的肺栓塞情况评为阳性或阴性。以相同方式对CT进行评估和解读。结果。磁共振成像平均在CT检查后40小时进行。CT显示48支血管受肺栓塞影响，其中69%在磁共振成像中被识别。磁共振成像检测到了所有位于右或左肺动脉的8个肺栓塞。在磁共振成像中未检测到的15个肺栓塞中，7个为亚段性，6个为段性，2个位于磁共振成像视野未包括的分支。结论。尽管我们的磁共振成像方案并非针对肺动脉可视化进行优化，但CT检测到的大多数肺栓塞在非增强磁共振成像中都能被识别。
