4D time-resolved magnetic resonance angiography for noninvasive assessment of pulmonary arteriovenous malformations patency.
J Magn Reson Imaging
; 32(5): 1110-6, 2010 Nov.
Article
em En
| MEDLINE
| ID: mdl-21031516
ABSTRACT
PURPOSE:
To assess the capability of four-dimensional (4D) time-resolved magnetic resonance angiography (MRA) to assess pulmonary arteriovenous malformations (PAVMs) patency by analyzing pulmonary arterial and venous enhancement kinetics. MATERIALS ANDMETHODS:
Seven patients with eight documented patent PAVMs underwent a 4D-MRA with keyhole and viewsharing compression at 3T with the following parameters spatial resolution 0.87 × 0.87 × 1.4 mm(3); field of view 500 × 350 × 238 mm(3); dynamic scan time (temporal resolution) 1.2 seconds; total acquisition time 18.1 seconds for six dynamic datasets (6 × 1.2 sec + reference scan 10.9 sec). All images were reviewed by two experienced radiologists. Image quality was rated on a qualitative 5-point scale (1 not assessable to 5 excellent). Signal value was measured on cross-sectional planes for the afferent arteries and efferent veins of the PAVM, and for normal reference healthy arteries and veins. The difference in time to peak for each coupled artery/vein (dTTPav) was calculated and compared with a Mann-Whitney test between PAVMs and reference vessels.RESULTS:
Mean image quality was 3.2 ± 0.9. dTTPav was significantly smaller in PAVMs (0.15 ± 0.76 sec) than in reference vessels (3.75 ± 1.62 sec), P < 0.001.CONCLUSION:
4D-MRA is a promising tool for noninvasive assessment of PAVM patency.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Malformações Arteriovenosas
/
Artéria Pulmonar
/
Veias Pulmonares
/
Angiografia por Ressonância Magnética
Tipo de estudo:
Qualitative_research
Limite:
Adult
/
Aged
/
Humans
/
Middle aged
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article