High-resolution intracranial vessel wall MRI in an elderly asymptomatic population: comparison of 3T and 7T.
Eur Radiol
; 27(4): 1585-1595, 2017 Apr.
Article
en En
| MEDLINE
| ID: mdl-27387876
ABSTRACT
OBJECTIVES:
Several intracranial vessel wall sequences have been described in recent literature, with either 3-T or 7-T magnetic resonance imaging (MRI). In the current study, we compared 3-T and 7-T MRI in visualising both the intracranial arterial vessel wall and vessel wall lesions.METHODS:
Twenty-one elderly asymptomatic volunteers were scanned by 3-T and 7-T MRI with an intracranial vessel wall sequence, both before and after contrast administration. Two raters scored image quality, and presence and characteristics of vessel wall lesions.RESULTS:
Vessel wall visibility was equal or significantly better at 7 T for the studied arterial segments, even though there were more artefacts hampering assessment. The better visualisation of the vessel wall at 7 T was most prominent in the proximal anterior cerebral circulation and the posterior cerebral artery. In the studied elderly asymptomatic population, 48 vessel-wall lesions were identified at 3 T, of which 7 showed enhancement. At 7 T, 79 lesions were identified, of which 29 showed enhancement. Seventy-one percent of all 3-T lesions and 59 % of all 7-T lesions were also seen at the other field strength.CONCLUSIONS:
Despite the large variability in detected lesions at both field strengths, we believe 7-T MRI has the highest potential to identify the total burden of intracranial vessel wall lesions. KEY POINTS ⢠Intracranial vessel wall visibility was equal or significantly better at 7-T MRI ⢠Most vessel wall lesions in the cerebral arteries were found at 7-T MRI ⢠Many intracranial vessel wall lesions showed enhancement after contrast administration ⢠Large variability in detected intracranial vessel wall lesions at both field strengths ⢠Seven-tesla MRI has the highest potential to identify total burden of intracranial atherosclerosis.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Imagen por Resonancia Magnética
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Arterias Cerebrales
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Arteriosclerosis Intracraneal
Tipo de estudio:
Observational_studies
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Prognostic_studies
Límite:
Aged
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Female
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Humans
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Male
Idioma:
En
Año:
2017
Tipo del documento:
Article