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. Author manuscript; available in PMC: 2018 Apr 1.
Published in final edited form as: Magn Reson Imaging. 2017 Dec 9;47:137–146. doi: 10.1016/j.mri.2017.12.011

Figure 5.

Figure 5

Top) Anatomic sagittal slice demonstrating the localization used in PCASL (left) and a transverse slice of the imaging plane (right). Internal carotid and vertebral arteries are denoted with white arrows. Bottom) Corresponding B1+ maps of the anatomical images. B1+ was significantly diminished at the intersection of the labeling plane and the cerebral feeding vessels compared to the imaging volume. Spatial heterogeneity in B1+ can lead to asymmetries in labeling efficiency that result in perceived asymmetries in CBF.