The effect of reducing spatial resolution by in-plane partial volume averaging on peak velocity measurements in phase contrast magnetic resonance angiography
| Autor: | Elisa McAlindon, Kishore S. Minhas, Nathan E Manghat, Mark Hamilton, Christopher J. Occleshaw, Jonathan C L Rodrigues, Guido E Pieles |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Scanner medicine.diagnostic_test business.industry Partial Volume Averaging computer.software_genre Inferior vena cava Magnetic resonance angiography 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine medicine.vein Voxel Peak velocity medicine Breathing Original Article Radiology Nuclear Medicine and imaging Nuclear medicine business computer Image resolution |
| Zdroj: | Quantitative Imaging in Medicine and Surgery. 6:564-581 |
| ISSN: | 2223-4306 2223-4292 |
| DOI: | 10.21037/qims.2016.10.06 |
| Popis: | BACKGROUND The aim of this study was to quantify the degree of the effect of in-plane partial volume averaging on recorded peak velocity in phase contrast magnetic resonance angiography (PCMRA). METHODS Using cardiac optimized 1.5 Tesla MRI scanners (Siemens Symphony and Avanto), 145 flow measurements (14 anatomical locations; ventricular outlets, aortic valve (AorV), aorta (5 sites), pulmonary arteries (3 sites), pulmonary veins, superior and inferior vena cava)- in 37 subjects (consisting of healthy volunteers, congenital and acquired heart disease patients) were analyzed by Siemens Argus default voxel averaging technique (where peak velocity = mean of highest velocity voxel and four neighbouring voxels) and by single voxel technique (1.3×1.3×5 or 1.7×1.7×5.5 mm3) (where peak velocity = highest velocity voxel only). The effect of scan protocol (breath hold versus free breathing) and scanner type (Siemens Symphony versus Siemens Avanto) were also assessed. Statistical significance was defined as P |
| Databáze: | OpenAIRE |
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