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Ultrafast contrast-enhanced three-dimensional MR angiography: state of the art Alley MT; Shifrin RY; Pelc NJ; Herfkens RJRadiographics 1998[Mar]; 18 (2): 273-85Ultrafast breath-hold contrast material-enhanced magnetic resonance (MR) angiography can be performed with a flexible imaging sequence. With the current generation of high-speed imaging gradients, it is possible to achieve sequence repetition times of 4 msec or less. These repetition times make it possible to obtain high-resolution (512 x 512 x 64) images in under 30 seconds. Applications of this versatile technique include imaging of aortic dissection, thoracic and abdominal aortic aneurysm, pulmonary embolus, carotid stenosis, and peripheral vascular disease. The administration of contrast material must be tailored to the vascular anatomy under examination to avoid venous enhancement. The rapid data acquisition times can be used to image multiple temporal phases or multiple locations. With this technique and administration of a T1-shortening contrast agent, high-quality MR angiography can be routinely performed in a variety of vascular regions (eg, thoracic and abdominal aorta, pulmonary arteries, carotid arteries, lower extremities).|*Contrast Media[MESH]|*Image Processing, Computer-Assisted[MESH]|*Magnetic Resonance Angiography/methods[MESH]|Aortic Aneurysm/diagnosis[MESH]|Carotid Stenosis/diagnosis[MESH]|Humans[MESH]|Peripheral Vascular Diseases/diagnosis[MESH]|Pulmonary Embolism/diagnosis[MESH]|Vascular Diseases/diagnosis[MESH] |
