27 cases of lung tumor patients performed SPECT imaging 48 to 120 hours after injection of 185 MBq 67Ga. 19（70%） showed positive result and undertook operation.11 of the 19 patients performed SPECT imaging again 3 months after operation

4 of 11 patients appeared new metastases. 6 months later 2 positive cases and 4 negative cases of the above 11 patients repeated 67Ga iamging. In positive cases

the metastases increased

whereas in negative cases

new metastases discovered. All these result was the same as X-ray and CT. It was concluded that 67Ga imaging is a simple and accurate method for the detection of recurrence

monitoring of therapeutic effect and treatment regime in lung tumor patients. 67Ga imaging has its good clinical value.