Objective: To explore the clinical value of SPECT in perioperative cardiopulmonary function evaluation of patients with lung cancer through echocardiography and SPECT detection. Methods: 63 patients were selected to receive echocardiography, SPECT myocardial perfusion imaging and SPECT lung perfusion imaging detection before and after 10 days. To compare forced expiratory volume in one second(FEV1) and analyze the correlativity between the predictive value of lung perfusion imaging FEV1 and the real value d...