ABSTRACT
Objective To study the application value of 1.5T MRI whole-body PET-like imaging in the chest,abdominal and pelvic primary occupying lesions.Methods Whole-body PET-like imaging were performed in 5 7 patients with chest,abdominal and pelvic primary occupying lesions.The detection rate of whole-body PET-like in chest,abdominal and pelvis primary occupying lesions were compared.Apparent diffusion coefficient (ADC)values for benign and malignant lesions were compared and analyzed.Results (1) All of 71 cases of chest,abdominal and pelvic primary occupying lesions,67 lesions (94.4%)were diagnosed by whole-body PET-like imaging. Among them,31(93.9%)of malignant lesions were detected and 36(94.7%)benign lesions were detected.There was not statistically significant of detection rate between benign and malignant lesions(P>0.05).(2)The range of ADC value:malignant tumor was (0.83-1.57)× 10-3mm2/s,among which 27 lesions ADC value less than 1.1×10-3mm2/s,accounting for 87.1%;The benign lesion was (1.41-3.16)× 10-3mm2/s,among which the total 32 lesion ADC values of liver cyst(13),hepatic hemangioma(9)and renal cyst(10)were greater than 2.0×10-3mm2/s,accounting for 88.9%.There was significantly different of ADC values between benign and malignant lesions (P<0.05).Conclusion There is higher detection rate on primary chest,abdominal and pelvic space occupying lesions for whole-body PET-like imaging,which is suitable for tumor screening in healthy population.It is helpful to differentiate benign and malignant tumors by quantitative analysis of ADC value.