title: Computerized axial tomography in the detection of orbital space-occupying lesions.
abstract: Of 41 patients we examined for a suspected primary orbital tumor, 25 patients had evidence of a lesion either histologically, angiographically, or surgically. We examined nine of the 25 patients by means of an EMI-Scanner and 16 by a fine matrix addition (160 times 160 cells), and compared these results to those we received by axial tomography, orbital venography, and B-scan ultrasound. We also compared the absorption values of the recorded tumors. The EMI-Scanner had a diagnostic accuracy of 84%; orbital venography, 84%; axial hypocycloidal tomography, 71%; and ultrasound, 76%. The fine matrix scanner gave a preoperative diagnostic rate of 93% and defined optic nerve abnormalities accurately. However, EMI, scanning should complement existing noninvasive procedures and orbital venography.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001847:Bone Diseases / Q000000981:diagnostic imaging; D002277:Carcinoma / Q000000981:diagnostic imaging; D002648:Child; D002830:Choroid Neoplasms / Q000000981:diagnostic imaging; D003936:Diagnosis, Computer-Assisted; D005134:Eye Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007765:Lacrimal Apparatus / Q000000981:diagnostic imaging; D008297:Male; D008545:Melanoma / Q000000981:diagnostic imaging; D008579:Meningioma / Q000000981:diagnostic imaging; D008875:Middle Aged; D009900:Optic Nerve / Q000000981:diagnostic imaging; D009915:Orbit / Q000098:blood supply; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging*; D010524:Peripheral Nervous System Neoplasms / Q000000981:diagnostic imaging; D010690:Phlebography; D014056:Tomography, X-Ray; D014463:Ultrasonography