Homologous black‐bright‐blood and flexible interleaved imaging sequence (HOBBI) for dynamic contrast‐enhanced MRI of the vessel wall. Issue 5 (7th May 2014)

• Record Type: Journal Article
• Authors: Wu, Tingting; Wang, Jinnan; Song, Yan; Deng, Xiaotao; Li, Anqi; Wei, Juan; He, Le; Zhao, Xihai; Li, Rui; Zhou, Zechen; Wu, Wenchuan; Huang, Juan; Jiao, Sheng; Yuan, Chun; Chen, Huijun
• Is Part Of: Magnetic resonance in medicine. Volume 73:Issue 5(2015:May)
• Page Start: 1754
• Page End: 1763
• Publication Date: 2014-05-07
• Subjects: dynamic contrast‐enhanced‐magnetic resonance imaging -- atherosclerosis -- sequence; Nuclear magnetic resonance -- Periodicals; Electron paramagnetic resonance -- Periodicals; 616.07548
• DOI: 10.1002/mrm.25287
• Languages: English
• ISSNs: 0740-3194

Abstract

Abstract : Purpose: To present a HOmologous Black‐Bright‐blood and flexible Interleaved imaging (HOBBI) sequence for dynamic contrast‐enhanced magnetic resonance imaging (MRI) of the vessel wall. Theory and Methods: A HOBBI sequence is proposed to acquire high‐spatial‐resolution black‐blood and high‐temporal‐resolution bright‐blood dynamic contrast‐enhanced images in an interleaved fashion. Black‐blood imaging allows for thin vessel wall evaluation, whereas bright‐blood imaging obtains the arterial input function accurately. A simulation was performed to assess the accuracy of the pharmacokinetic parameters [transfer constant ( K trans ) and fractional plasma volume ( v p )] generated from HOBBI. In vivo evaluation was also used to validate HOBBI in an animal model of aortic atherosclerosis. Results: In the simulation test, the estimated K trans and v p measured by HOBBI were more accurate than those from black‐blood dynamic contrast‐enhanced‐MRI. In the animal model testing, K trans and v p also demonstrated good interscan reproducibility ( K trans : ICC = 0.77, v p : ICC = 0.72, respectively). Additionally, K trans showed a significant increase from 1 month (0.026 ± 0.013 min −1 ) to 2 months (0.069 ± 0.018 min −1 ) in animal model plaque progression after balloon injury. Conclusion: The proposed HOBBI sequence was demonstrated to be feasible and accurate in estimating the pharmacokinetic parameters of the atherosclerotic vessel wall, and has potential to become an early screening tool for atherosclerosis disease. Magn Reson Med 73:1754–1763, 2015. © 2014 Wiley Periodicals, Inc.