AN IMAGING STRATEGY FOR ORBITAL LESIONS

Abstract

The orbit is the host of many pathological processes such as neoplastic, inflammatory, vascular and traumatic. Although the orbit can be divided into several compartments, many of the pathological processes involve more than one compartment or division, hence orbital imaging has always been a challenge to radiologists.

Establishing the correct diagnosis of an orbital lesion is crucial since the management may vary considerably according to the specific type of pathology. In recent years following the introduction of CT and MRI, orbital diagnosis has shifted markedly toward the modicum of technology and away from almost sole reliance on ophthalmologic assessment.

Although CT is superior to MR imaging in portraying fme bone details, however, MRI is a unique imaging method providing information not obtainable by CT. MRI appears to be ideally suited as an imaging tool in ophthalmology. Its

multiplanar capability, prominent soft tissue contrast and lack of ionizing radiation, make MRI a valuable imaging technique.

The aim of this study was to develop an imaging strategy for orbital lesions and to assess the utility of CT and MRI in the evaluation of lesions of the orbit. Two hundred patients referred to the radiology department, presenting with various orbital lesions, were included in the study. Different radiological modalities such as CT, MRI and color Doppler sonography were performed to the patients according to the clinical