NDLI: In vivo differentiation of two vessel wall layers in lower extremity peripheral vein bypass grafts: Application of high-resolution inner-volume black blood 3D FSE

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In vivo differentiation of two vessel wall layers in lower extremity peripheral vein bypass grafts: Application of high-resolution inner-volume black blood 3D FSE

Content Provider	Scilit
Author	Mitsouras, Dimitris Owens, Christopher D. Conte, Michael S. Ersoy, Hale Creager, Mark A. Rybicki, Frank J. Mulkern, Robert V.
Copyright Year	2009
Description	Journal: Magnetic Resonance in Medicine Lower extremity peripheral vein bypass grafts (LE-PVBG) imaged with high-resolution black blood three-dimensional (3D) inner-volume (IV) fast spin echo (FSE) MRI at 1.5 Tesla possess a two-layer appearance in T1W images while only the inner layer appears visible in the corresponding T2W images. This study quantifies this difference in six patients imaged 6 months after implantation, and attributes the difference to the T(2) relaxation rates of vessel wall tissues measured ex vivo in two specimens with histologic correlation. The visual observation of two LE-PVBG vessel wall components imaged in vivo is confirmed to be significant (P < 0.0001), with a mean vessel wall area difference of 6.8 +/- 2.7 mm(2) between contrasts, and a ratio of T1W to T2W vessel wall area of 1.67 +/- 0.28. The difference is attributed to a significantly (P < 0.0001) shorter T(2) relaxation in the adventitia (T(2) = 52.6 +/- 3.5 ms) compared with the neointima/media (T(2) = 174.7 +/- 12.1 ms). Notably, adventitial tissue exhibits biexponential T(2) signal decay (P < 0.0001 vs monoexponential). Our results suggest that high-resolution black blood 3D IV-FSE can be useful for studying the biology of bypass graft wall maturation and pathophysiology in vivo, by enabling independent visualization of the relative remodeling of the neointima/media and adventitia.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2745043/pdf
Ending Page	615
Page Count	9
Starting Page	607
e-ISSN	15222594
DOI	10.1002/mrm.22037
Journal	Magnetic Resonance in Medicine
Issue Number	3
Volume Number	62
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2009-05-15
Access Restriction	Open
Subject Keyword	Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Ultra-high Resolution Magnetic Resonance Imaging Vessel Wall Imaging Peripheral Vein Bypass Graft Mri Multi-contrast Mri Black Blood Inner-volume Imaging, 3d Fse
Content Type	Text
Resource Type	Article

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