[Flow contrast behavior in fast MR angiography with an ECG-triggered, slice-selective inversion recovery turbo-FLASH technique]. / Verhalten des Flusskontrastes bei schneller MR-Angiographie mit einer EKG-getriggerten, schichtselektiven Inversion-recovery-Turbo-FLASH-Technik.
Rofo
; 164(6): 464-8, 1996 Jun.
Article
en De
| MEDLINE
| ID: mdl-8688502
PURPOSE: To optimise and evaluate fast "inflow"-based contrast-prepared gradient-echo magnetic resonance angiography (MRA) of blood vessels with pulsatile flow. MATERIAL AND METHOD: We used a standard 2-D Turbo-FLASH sequence with an acquisition time of 0.9 s and a slice-selective hyperbolic secant inversion (SSIR) pulse for contrast preparation. Trigger delay and inversion time were systematically varied. RESULTS: Abdominal blood vessels of volunteers showed high signal intensity compared to stationary tissue without pulsatile artifacts. However, depending on cardiac cycle and inversion time, venous vessels in particular exhibited a periodic signal drop by maximum 70% of the peak value. Using optimised parameters SSIR turbo-FLASH images of patients could be obtained with high flow contrast between normal and pathological structures. CONCLUSION: With ECG triggering SSIR Turbo-FLASH MRA enables fast imaging of pulsatile vessels with optimised flow contrast.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Angiografía por Resonancia Magnética
/
Electrocardiografía
Límite:
Humans
Idioma:
De
Revista:
Rofo
Año:
1996
Tipo del documento:
Article
Pais de publicación:
Alemania