SPECT coincidence imaging was performed on a dual-head gamma camera （DST-XLi

SMV） to allow the detection of 511keV gamma emission of

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FDG positron radionuclides.

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FDG was provided by Shanghai Institute of Nuclear Research. All the patients with lung lesions on X-ray film have not yet confirmed in diagnosis underwent

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FDG imaging. Patients fasted 4 hours before administration of

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FDG and kept rest from 1-2 hours after intravenous administration of 37-111MBq

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FDG. Images were reconstructed by lterative reconstruction. Draw ROI on lesion area （L） and control area （C）. The L/C ratio larger than 1.3

it was considered positive. Of total 39 cases

the sensitivity

specificity and accuracy was 93%（25/27）

83%（10/12） and was 90%（35/39） respectively

for the diagnosis of lung cancer. Therefore coincidence imaging of

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FDG-SPECT is a suitable and reliable new technology for the diagnosis of lung cancer.