Multi-detector row CT of thoracic disease with emphasis on 3D volume rendering and CT angiography

Multi-detector row computed tomography (CT) with three-dimensional (3D) vol ume rendering provides a unique perspective on thoracic anatomy and disease . Multi-detector row CT allows shorter acquisition times, greater coverage, and superior image resolution. Three-dimensional volume rendering now perm its real-time, interactive modification of relative pixel attenuation in an infinite number of planes and projections. In vascular imaging, this techn ique provides image quality that equals or surpasses that of conventional a ngiography. Its use has expanded to aid in diagnosis and surgical planning, often obviating conventional or digital angiography and reducing costs. It is reliable in depicting clot and the pulmonary vasculature and may also b e used to evaluate thoracic venous anomalies (eg, pulmonary arteriovenous m alformations) and to plan therapy. Airway imaging with multi-detector row C T with 3D volume rendering is particularly useful in the planning and follo w-up of stent placement. In diffuse lung disease, this technique can increa se nodule detection and help differentiate between small nodules and vessel s. It is also helpful in imaging the musculoskeletal system and the thoraci c cage. Multi-detector row CT with 3D volume rendering has enhanced the con ventional roles of thoracic CT and challenged the supremacy of other imagin g modalities. It will likely play a leading role in future radiologic resea rch and practice.