Standardized volume-rendering of contrast-enhanced renal magnetic resonance angiography
2005 (English)In: Acta Radiologica, ISSN 0284-1851, E-ISSN 1600-0455, Vol. 46, no 5, 497-504 p.Article in journal (Refereed) Published
Purpose: To propose a technique for standardizing volume-rendering technique (VRT) protocols and to compare this with maximum intensity projection (MIP) in regard to image quality and diagnostic confidence in stenosis diagnosis with magnetic resonance angiography (MRA). Material and Methods: Twenty patients were examined with MRA under suspicion of renal artery stenosis. Using the histogram function in the volume-rendering software, the 95th and 99th percentiles of the 3D data set were identified and used to define the VRT transfer function. Two radiologists assessed the stenosis pathology and image quality from rotational sequences of MIP and VRT images. Results: Good overall agreement (mean κ=0.72) was found between MIP and VRT diagnoses. The agreement between MIP and VRT was considerably better than that between observers (mean κ=0.43). One of the observers judged VRT images as having higher image quality than MIP images. Conclusion: Presenting renal MRA images with VRT gave results in good agreement with MIP. With VRT protocols defined from the histogram of the image, the lack of an absolute gray scale in MRI need not be a major problem. © 2005 Taylor & Francis.
Place, publisher, year, edition, pages
2005. Vol. 46, no 5, 497-504 p.
Magnetic resonance angiography, maximum intensity projection, post-processing, stenosis, visualisation, volume-rendering
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-30244DOI: 10.1080/02841850510021454Local ID: 15749OAI: oai:DiVA.org:liu-30244DiVA: diva2:251066