The utility of ~(99m)Tc-Sandostatin somatostatin receptor imaging in the evaluation of lung cancer / 医学研究生学报

ABSTRACT

Objective: To determine the noninvasive imaging efficacy of 99mTc-sandostatin scintigraphy for lung cancer. Methods: 57 consecutive patients with pulmonary nodules(PN) were studied with 99mTc-sandostatin scintigraphy.Planar imaging was obtained after injection of (991.6?187.59) MBq of 99mTc-sandostatin at 1.5-4 hour with GE Dual-head gamma camera(Millennium VG, Hawkeye ;General Electric Medical Systems) . SPECT images of the chest were performed at 4-6 h post injection. All scintigraphically detected lesions were confirmed by histopathological analysis and/or by other imaging modalities.Tumor to normal tissues ratios (T/N) were calculated . Results: Out of 57 patients ,47 were malignant tumors; 12 with small cell lung cancer (SCLC), 35 with non- small cell lung cancer (NSCLC). 10 had benign lesions. The sensitivity , specificity and accuracy of 99mTc-Sandostatin in detection of lung cancer were 95.7%, 90%, 94.7%, respectively. In two patients (pts) with pulmonary squamous cell cancer 99mTc-Sandostatin imaging was false negative. In 10 pts. with benign PN, 9 pts. was true negative, but one patient with tubercolama was false positive. T/N ratio was 3.43?0.66, 2.24?0.31 in SCLC and NSCLC respectively. The T/N ratio was higher in small cell lung cancer than NSCLC(t = 4.072 ,P