Walsh & Hoyt: Imaging of Tumors

Tumors confined to the globe are probably best imaged with ultrasonography, although CT can provide further detail, especially if the process involves calcification (such as seen in retinoblastoma) or acute hemorrhage. CT may also help differentiate ocular neoplasms with calcification from other processes that may produce leukokoria and/or have calcification. Spiral CT reduces image acquisition time, thereby limiting the need for anesthesia in children with leukokoria. New MR techniques are increasing its applicability in intraocular lesions. De Potter et al. found MR imaging helpful in the evaluation of small ocular masses, especially as regards their extension to the extraocular optic nerve and orbit.