Thorax: Low-Dose Contrast-enhanced Three-dimensional MR Angiography with Subsecond Temporal Resolution—Initial Results
| Autor: | Gerhard Laub, James C. Carr, Richard M. McCarthy, F. Scott Pereles, J. Paul Finn, Visveshwar Baskaran, Randall Kroeker |
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| Rok vydání: | 2002 |
| Předmět: |
Adult
Gadolinium DTPA Lung Diseases Male Thorax Pulmonary Circulation medicine.medical_specialty Adolescent Heart Diseases media_common.quotation_subject Aortic Diseases Contrast Media Humans Medicine Contrast (vision) Radiology Nuclear Medicine and imaging Aged media_common Aged 80 and over medicine.diagnostic_test business.industry Echo time Low dose Mr angiography Magnetic resonance imaging Middle Aged Temporal resolution Female Radiology Bolus (digestion) business Magnetic Resonance Angiography |
| Zdroj: | Radiology. 224:896-904 |
| ISSN: | 1527-1315 0033-8419 |
| Popis: | The purpose of the study was to implement a three-dimensional (3D) magnetic resonance (MR) angiographic technique with acquisition times on the order of 800 msec with use of a spoiled gradient-echo pulse sequence (repetition time, 1.60 msec; echo time, 0.65 msec) and bolus intravenous injection of contrast material doses as small as 6 mL. High-spatial-resolution conventional MR angiography performed with 30 mL of gadopentetate dimeglumine was the reference standard. As implemented, subsecond 3D MR angiography allowed temporal sampling that was rapid enough to depict short-lived processes, as illustrated in patients with shunts and dissections. With small contrast material doses and subsecond frame rates, it is also possible to measure pulmonary arteriovenous circulation times with this 3D MR angiographic technique. © RSNA, 2002 |
| Databáze: | OpenAIRE |
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