Three-dimensional time-of-flight MR angiography with a surface coil: evaluation in 12 subjects
| Autor: | J A Borne, Victor M. Haughton, D L Daniels, L E Hendrix, L F Czervionke, Leighton P. Mark, Alan L. Williams, J A Strandt |
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| Rok vydání: | 1992 |
| Předmět: |
Intracranial Arteriovenous Malformations
medicine.medical_specialty Time Factors medicine.diagnostic_test business.industry Angiography Magnetic resonance imaging General Medicine Time of flight mr angiography Cerebral Arteries Magnetic Resonance Imaging Peripheral Normal volunteers Electromagnetic coil Surface coil Medicine Humans Radiology Nuclear Medicine and imaging Radiology business |
| Zdroj: | AJR. American journal of roentgenology. 159(1) |
| ISSN: | 0361-803X |
| Popis: | We compared three-dimensional time-of-flight MR angiograms obtained with head coils and then with surface coils in five patients with intracranial vascular lesions and in seven normal volunteers to determine if imaging of intracranial vascular anatomy could be improved with the use of a surface coil. Visualization of small peripheral vessels was consistently better with a surface coil than with a head coil at identical small fields of view (FOVs). The surface-coil technique allowed small-FOV imaging of peripheral vascular lesions with higher spatial resolution and signal-to-noise ratio similar to that of large-FOV head-coil images. The use of a surface coil introduced the problem of signal falloff; centrally located vessels were visualized as well or better when a standard head coil was used. We conclude that surface-coil MR angiography can serve as a useful adjunct to routine head-coil MR angiography in the evaluation of peripheral vascular abnormalities. |
| Databáze: | OpenAIRE |
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