Accurate assessment of carotid artery stenosis in atherosclerotic mice using accelerated high-resolution 3D magnetic resonance angiography
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : David Ratering · Christof Baltes · Christine Lohmann · Christian M. Matter · Markus Rudin
- چاپ و سال / کشور: 2011
Description
Object High-resolution magnetic resonance angiography (MRA)enables non-invasive detection and longitudinal monitoring of atherosclerosis in mousemodels of human disease. However, MRA is hampered by long acquisition times putting high demands on the physiological stability of the animal. Therefore, we evaluated the feasibility of accelerated MRA using the parallel imaging technique SENSE with regard to both lesion detection and quantification. Materials and methods MRA acquisitions of supra-aortic vessels were performed in ApoE./. mice that have been shown to develop atherosclerotic plaques. Findings obtained from accelerated data sets were compared to fully sampled reference data sets and histology. Results Our results revealed only minor differences in detecting vascular lesions for data collections accelerated by factors of up to 3.3 using a four-element coil array. For vessels with a mean lumen diameter of 500 ىm, morphometry of stenotic lesions revealed no substantial deviations from reference (fully sampled) data for all investigated acceleration factors. For the highest acceleration factor of 3.3, an average deviation of the degree of stenosis of 4.9 ± 3.6% was found. Common carotid stenoses assessed by in vivo MRA displayed a good correlation with histological analyses (slope of linear regression = 0.97, R2 = 0.98). Conclusion According to the results of this work, we have demonstrated the feasibility and accuracy of accelerated high-resolution 3D ToF MRA in mice suitable for detailed depiction ofmouse supra-aortic vessels and amenable to noninvasive quantification of small atherosclerotic lesions.
Magn Reson Mater Phy (2011) 24:9–18 DOI 10.1007/s10334-010-0227-6 Received: 11 June 2010 / Revised: 4 September 2010 / Accepted: 6 September 2010 / Published online: 23 September 2010
