To describe the detailed clinical, to analyze the detailed clinical features, Imaging Characteristics of PSP under multislice spiral computed tomography (MSCT), and ¹⁸F-fluorodeoxy glucose positron emission tomography (¹⁸F-FDG PET/CT) , in order to improve the preoperative diagnosis.

A total of 55 patients with PSP confirmed by surgical pathology were included, 48 cases received CT plain scan, 33 cases received CT enhanced scan and 19 cases received ¹⁸F-FDGPET/CT imaging. The distribution, morphology, size, clinicoradiological signs and metabolic uptake results of lesions were further analyzed. the relationship between maximum standardized uptake value (SUV_max) and maximum diameter of lesions were observed.

Most patients had a single lesion (94.5%), smooth boundary (89%), and round or oval shape (85.5%), and the mean diameter was 25.6 mm. The mainCT signs included vessel marginal sign (45.5%), halo sign (12.7%), air crescent sign (16.4%) and calcification (41.8%). Delayed phase of Enhanced scanning tends to be continuous and homogeneous enhanced. Besides, The mean maximum standardized uptake value on FDG PET of 19 patients was (2.87±1.20). the maximum standardized uptake value (SUV_max) of 19 patients were significantly positively correlated with the maximum diameter of lesions (R=0.51, P<0.001).

Imaging Characteristics of PSP in MSCT is special, such as vessel marginal sign, halo sign, air crescent sign and calcification. And the ¹⁸F-FDGPET/CT scan revealed hypometabolic FDG uptake in the patients with PSP, which may be related to the increased uptake of FDG. MSCT imaging signs and ¹⁸F-FDGPET/CT metabolic uptake provide a theoretical basis for the correct diagnosis of PSP.