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• W2034928043 abstract "The purpose of this study was to investigate the effect on three-dimensional (3D) magnetic resonance digital subtraction angiography (MR DSA) images of various injection protocol parameters (ie, injection order, volume, and rate), as well as image masking. The pelves of 10 normal volunteers were scanned using seven different contrast agent volume/injection rate combinations. Subtraction of a precontrast mask image resulted in vascular image contrast improvements of between 4.0 and 7.7 times. Image quality and smaller vessel image contrast in the masked data decreased with increasing injection number. Data acquired with a high (0.150 mmol kg−1) volume yielded the highest quality images, although only small nonsignificant differences in image quality and large vessel conspicuity were found between images obtained using the high and medium (0.075 mmol kg−1) volumes. Images acquired with a low (0.038 mmol kg−1) volume, while of lower image contrast, were judged to be of reasonable quality, especially when acquired as the first or second injection. Injection rate (1 ml s−1, 2 ml s−1, and 4 ml s−1) was not found to affect the images significantly, although selection of an injection rate that gave an injection duration of ∼ 10 seconds tended to give better vascular image contrast. Based on these data, a series of escalating volumes for multi-injection examination is proposed. J. Magn. Reson. Imaging 2000;12:476–487. © 2000 Wiley-Liss, Inc." @default.
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• W2034928043 date "2000-01-01" @default.
• W2034928043 modified "2023-10-18" @default.
• W2034928043 title "3D MR DSA: Effects of injection protocol and image masking" @default.
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• W2034928043 doi "https://doi.org/10.1002/1522-2586(200009)12:3<476::aid-jmri14>3.0.co;2-f" @default.
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