Batra P, Brown K, Collins J D, Ovenfors C O, Steckel R J
Department of Radiological Sciences, UCLA Medical Center 90024.
Am Rev Respir Dis. 1988 Jun;137(6):1456-62. doi: 10.1164/ajrccm/137.6.1456.
A comparison was made of the ability of plain chest radiography, computed tomography (CT), and magnetic resonance imaging (MRI) to detect and assess the intrathoracic extent of lung cancer in 46 patients. The chest radiographs (CXR) were obtained with a high kilovoltage phototimed technique. The CT scans were obtained with a GE 9800 machine and the MRI studies with a 0.3 Tesla permanent magnet imaging system. The primary tumor was well demonstrated by all 3 imaging techniques; however, the configuration of lesions was best demonstrated by CT. MRI was superior to CXR and CT for demonstrating hilar involvement in 4 cases. CT and MRI were generally comparable for demonstrating mediastinal involvement but were superior to CXR. In 2 cases, small normal size nodes seen on CT were considered to be a single large abnormal node on MRI. Because of the paucity of signal from flowing blood, compression and displacement of vessels were easier to identify with MRI. In 1 case, a small pleural effusion was better seen with CT than with CXR or with MRI. Direct chest wall involvement in 1 case was not seen by CXR. Vertebral body abnormality in another case was seen only by MRI and not by CXR or CT. At present, MRI, with its long scanning time, motion degradation of the image, and poor spatial resolution, is inferior to CT for imaging lung cancer. For evaluation of intrathoracic extent of lung cancer, CT remains the procedure of choice after performing plain chest radiography.
对46例患者进行了胸部X线平片、计算机断层扫描（CT）和磁共振成像（MRI）检测及评估肺癌胸内范围能力的比较。胸部X线片（CXR）采用高千伏光控技术获取。CT扫描使用GE 9800机器进行，MRI研究使用0.3特斯拉永磁成像系统进行。所有3种成像技术均能很好地显示原发性肿瘤；然而，CT对病变形态的显示最佳。MRI在显示4例肺门受累方面优于CXR和CT。在显示纵隔受累方面，CT和MRI总体相当，但均优于CXR。在2例中，CT上显示的正常大小的小结节在MRI上被认为是单个大的异常结节。由于流动血液信号稀少，MRI更容易识别血管的受压和移位。在1例中，CT比CXR或MRI更能清楚地显示少量胸腔积液。CXR未发现1例直接胸壁受累情况。另一例椎体异常仅在MRI上可见，CXR和CT均未发现。目前，MRI扫描时间长、图像运动伪影及空间分辨率差，在肺癌成像方面不如CT。对于评估肺癌的胸内范围，在进行胸部X线平片后，CT仍是首选检查方法。
