What are the MRI manifestations of bronchial lung cancer?

MRI examination of lung cancer can be used as an important supplement to chest X-ray and CT diagnosis, especially in finding hidden parts of lung and mediastinal lymph node metastasis. The MRI manifestations of lung cancer are as follows: ① Nodules or masses in the lung, solid masses with moderate signal on t 1 weighted images, and uniform signal; T2-weighted image is medium-high signal with uneven signal; The cystic degeneration, necrosis and liquefaction areas in the mass showed long T 1 and long T2 signal. The outer edge of the mass is not smooth, which can be characterized by lobulation, burr, umbilical depression, spinous process and pleural depression with different lengths. ② In central lung cancer, besides showing hilar masses, thickening, destruction, lumen stenosis and obstruction of bronchial wall communicating with the masses are often seen, as well as obstructive pneumonia and obstructive atelectasis. The signal of atelectasis on t 1 weighted image is lower than that of mass, and the signal on T2 weighted image is higher than that of mass. ③ Cancer focus can invade mediastinum, pleura, chest wall and other structures. Pleural invasion is characterized by pleural metastatic nodules or pleural effusion on MRI. Pleural nodules showed moderate signal, and pleural effusion showed long T 1 and long T2 signal. The signal of muscle invasion of chest wall is obviously different from that of normal chest wall structure, and it is easy to distinguish. Lymph node metastasis, due to the black cavity effect of mediastinal and hilar vessels, is particularly easy to find swollen lymph nodes, and lymph nodes show moderate or high signal on Tl and T2 weighted images. ④ Superior vena cava syndrome caused by mediastinal lung cancer, superior sulcus cancer, tumor focus compression, lymph node metastasis or tumor thrombus formation can be definitely diagnosed by MRI.