Contrast-enhanced Magnetic Resonance Imaging of Brain Metastases at 7.0T versus 1.5T: A Preliminary Result
Investigative Magnetic Resonance Imaging
;
: 31-36, 2015.
Article
Dans Anglais
| WPRIM
| ID: wpr-145441
ABSTRACT
PURPOSE:
To compare the depiction of brain metastases on contrast-enhanced images with 7.0 tesla (T) and at 1.5T MRI. MATERIALS ANDMETHODS:
Four consecutive patients with brain metastases were scanned on 7.0T whole-body scanner and 1.5T MRI. A 3D T1-weighted gradient echo sequence (3D T1-GRE) at 1.5T (voxel size = 0.9 x 0.9 x 1.5 mm3 after double-dose, gadoterate meglumine, Gd-DOTA) was compared to a 7.0T 3D T1-GRE sequence (voxel size = 0.4 x 0.4 x 0.8 mm3, single-dose Gd-DOTA) in four patients after a 5 minute delay. The number of contrast-enhancing metastases in MPRAGE images was compared in each patient by two radiologists in consensus. We measured contrast ratio of enhancing brain metastases and white matter in 1.5T and 7.0T.RESULTS:
In all four patients 7.0T 3D T1-GRE images after single-dose Gd-DOTA and 1.5T after double-dose Gd-DOTA depicted 11 brain metastases equally. In the quantitative analysis of contrast ratios of enhancing brain metastases and white matter, the 1.5T 3D T1-GRE after double-dose showed an increased contrast ratio compared to 7.0T 3D T1-GRE after single-dose (0.961 +/- 0.571 versus 0.885 +/- 0.494; n = 11 metastases). But this difference was not statistically significant (P = 0.711).CONCLUSION:
Our preliminary results indicate that 7.0T single-dose Gd-enhanced images were not different to 1.5T double-dose Gd-enhanced images for the detection of brain metastases.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Encéphale
/
Imagerie par résonance magnétique
/
Consensus
/
Méglumine
/
Métastase tumorale
Type d'étude:
Guide de pratique
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
Investigative Magnetic Resonance Imaging
Année:
2015
Type:
Article
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