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Objective To discuss the CT characteristics of AIDS's brain common disease,so that to improve the diagnostic level.Methods CT features of brain lesions in 25 patients with AIDS were retrospectively analyzed.Results Acute HIV encephalitis(n=6),CT features included low density at the basis festival area and the ventriculi laterals,no enhancement on contrast-enhanced scan in 1 case.Subacute HIV brain illness(n=5),CT images showed different degree of atrophy.Toxoplasmosis(n=4),CT images showed iso-dense tubercles with edema in the deep part of brain white matter or iso-dense circle at the edema area.Cytomegalovirus encephalitis(n=3),CT images showed symmetrical low density at bilateral cerebral occipital lobe,internal capsule and thalamus.Progressive multifocal leukoencepathy(n=3),CT showed multiple low density at the inferior surface of brain cortex,the gyri close of focus was clearer,and far of tapetum room system.Mixed infectious(n=4),mixed CT characteristics.Conclusion CT is beneficial in the differential diagnosis of brain disease in AIDS.
RESUMO
Objective To study the X-ray and CT findings of pneumocystis carinii pneumonia(PCP)in AIDS.Methods 18 cases with PCP in AIDS proved by clinic and pathologically were collected.HIV antibody was positive in all cases.Chest radigraphy and CT scan were taken in all cases.The imaging findings were analysed.Results The typical features of PCP on radiography and CT included unsymmetric diffuse mesh or reticulo-nodular changes,symmetric ground-glass opacification and many more even lobar consolidations which distributed in bilateral hilar regions and middle-lower lung fields.The atypical manifestations included cystic lesions,lobar consolidation,hilar and/or mediastinal adenopathy,pleural effusion,pneumothorax,atelectasis,mass and cavity-mass.Conclusion Plain chest film and CT scan are of important value in diagnosis of PCP.It is possible to diagnose PCP in patients with typical imaging manifestations positive HIV and in combination with clinical data.