Objective To study metabolic characteristics of pulmonary inflammatory granulomas and malignant lesions of different sizes below 5 cm and evaluate diagnostic value of SUVmax for inflammatory granulomas and malignant lesions. Methods The clinical and imaging data of 138 patients were retrospectively analyzed. The maximum diameter and SUVmax were measured. The lesions were divided into 5 groups according to the maximum diameter, including 〈 1 cm, 1 - 2 cm, 2 - 3 cm, 3 - 4 cm and 4 - 5 cm group. SPSS 20.0 software was used for statistical analysis. Results The SUVmax values of inflammatory granulomas below 3 cm were all higher than those of malignant lesions, and the differences were statistically significant. The SUVmax of inflammatory granulomas in 3 - 4 cm was similar to malignant lesions and the SUVmax of inflammatory granulomas was slightly higher, but the difference was not statistically significant. The SUVmax of malignant lesions in 4 - 5cm was higher than that of inflammatory granulomas, and the difference was statistically significant. Conclusions The SUVmax is a diagnostic indicator of benign and malignant pulmonary lesions. The relationship between the SUVmax and the size of the lesion must be paid attention to in the clinical diagnosis. At the same time, the diagnostic accuracy can be improved by combining with the signs of HRCT.
Functional and Molecular Medical Imaging(Electronic Edition)