Radiomics Model for the Diagnosis of Pneumocystis Jirovecii Pneumonia in Non-HIV Patients

Inclusion Criteria: * aged over eighteen years; * presence of an underlying disease known to be associated with PCP * symptoms of lower respiratory tract infection, such as fever, cough or dyspnea * signs of lung infection on high resolution CT at the on-set of the disease * received BAL examination within three days after CT scans * underwent qPCR and IF staining tests on the BAL fluid sample. Exclusion Criteria: * with HIV infection * taking trimethoprim-sulfamethoxazole for prophylaxis * undiagnosed by qPCR and IF staining tests