Evaluation of fast highly undersampled contrast-enhanced MR angiography (sparse CE-MRA) in intracranial applications - initial study.
Eur Radiol
; 27(3): 1004-1011, 2017 Mar.
Article
en En
| MEDLINE
| ID: mdl-27300194
ABSTRACT
OBJECTIVES:
To assess the image quality of sparsely sampled contrast-enhanced MR angiography (sparse CE-MRA) providing high spatial resolution and whole-head coverage. MATERIALS ANDMETHODS:
Twenty-three patients scheduled for contrast-enhanced MR imaging of the head, (N = 19 with intracranial pathologies, N = 9 with vascular diseases), were included. Sparse CE-MRA at 3 Tesla was conducted using a single dose of contrast agent. Two neuroradiologists independently evaluated the data regarding vascular visibility and diagnostic value of overall 24 parameters and vascular segments on a 5-point ordinary scale (5 = very good, 1 = insufficient vascular visibility). Contrast bolus timing and the resulting arterio-venous overlap was also evaluated. Where available (N = 9), sparse CE-MRA was compared to intracranial Time-of-Flight MRA.RESULTS:
The overall rating across all patients for sparse CE-MRA was 3.50 ± 1.07. Direct influence of the contrast bolus timing on the resulting image quality was observed. Overall mean vascular visibility and image quality across different features was rated good to intermediate (3.56 ± 0.95). The average performance of intracranial Time-of-Flight was rated 3.84 ± 0.87 across all patients and 3.54 ± 0.62 across all features.CONCLUSION:
Sparse CE-MRA provides high-quality 3D MRA with high spatial resolution and whole-head coverage within short acquisition time. Accurate contrast bolus timing is mandatory. KEY POINTS ⢠Sparse CE-MRA enables fast vascular imaging with full brain coverage. ⢠Volumes with sub-millimetre resolution can be acquired within 10 seconds. ⢠Reader's ratings are good to intermediate and dependent on contrast bolus timing. ⢠The method provides an excellent overview and allows screening for vascular pathologies.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Aumento de la Imagen
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Angiografía por Resonancia Magnética
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Medios de Contraste
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Enfermedades Arteriales Intracraneales
Tipo de estudio:
Diagnostic_studies
Límite:
Adolescent
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Adult
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Aged
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Año:
2017
Tipo del documento:
Article