role of multi-detector computed tomography in the assessment of cystic and cavitary pulmonary lesions

Lung cysts and cavities are well defined lesions with definable walls containing air or fluid. The differential diagnosis is broad including congenital, idiopathic, infective or neoplastic lesions. Multidetector row CT is primary non-invasive evaluation of cystic and cavitary lesions. To assess the role of multi-detector computed tomography [MDCT] in evaluation of cystic and cavitary lesions in the lung. The study was conducted on 63 patients with cystic or cavitary pulmonary lesions and subjected to MDCT. The study included 33 patients with infective lesions, 13 patients with idiopathic lesions, eight patients with congenital lesions, seven patients with neoplastic lesions and two patients with pseudocystic lesions proved to be due to diaphragmatic hernias. MDCT is an accurate safe diagnostic modality in assessing cystic and cavitary lung lesions; it can assess wall thickness, size, contents and surrounding parenchyma

Computed tomography [CT] versus magnetic resonance imaging [MRI] in differentiation between neoplastic orbital lesions

To compare between the role of CT and MRI in diagnosis of neoplastic orbital lesions. The study included 126 patients proved to have orbital neoplasm and were subjected to CT and MRI. The study included. 59 males and 67 females with age ranged from 12 days to 91 years. The orbital lesions were bilateral in 16 patients. The lesions were distributed according to their location in one or more of the five orbital compartments including optic nerve, globe, conal intraconal, extra-conal and preseptal space. The most frequent encountered lesion was lymphoma followed by following order: uveal melanoma, optic nerve glioma, juxtaorbital meningioma, retinoblastoma, optic nerve meningioma, rhabdomyosarcoma, metastases, pleomorphic carcinoma, leukemia, aneurysmal bone cyst, schwannoma, neurofibroma, capillary hemangioma, basal cell fibroma, lacrimal gland carcinoma, malignant fibrous histiocytoma, malignant teratoma, osteoma, assifying fibroma and esthesioneuroblastoma. CT assessed the attenuation values of the lesion, presence of enhancement, bony changes and calc/lcations. MRJ assessed signal changes on T1 and T2WI and enhancement. CT and MRI are complimentary studies for imaging of orbital neoplasm