Tiwari, S. and Jeyanthi, K. (2012) Study of Origin of Inferior Phrenic Arteries from the Celiac Trunk. Anatomica Karnataka, 6, 38-41.

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However, it is user-dependent, and cannot be used to examine distal parts of the internal carotid artery because bony structures obstruct the view. This is also the case for the vertebral arteries.