Abstract #1328

The pointwise encoding time reduction with radial acquisition (PETRA) sequence: visualization of intracranial arteries and facial nerve canals

Sachi Okuchi¹, Yasutaka Fushimi¹, Tomohisa Okada^1,2, Akira Yamamoto¹, Tsutomu Okada¹, Takuya Hinoda¹, Yutaka Natsuaki³, and Kaori Togashi¹

¹Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan, ²Human Brain Research Center, Kyoto University Graduate School of Medicine., Kyoto, Japan, ³Siemens Medical Solutions USA, Inc., Huntington Beach, CA, United States

The PETRA sequence provided good image quality. We compared the visualization of the intracranial arteries between TOF-MRA and PETRA-MRA, and evaluated the visualization of the facial nerve canal among PETRA and other 3D sequences (MPRAGE and SPACE). PETRA-MRA was less visualized at the peripheral artery, but PETA-MRA was as well as TOF-MRA at the main trunk. In the visualization of the facial nerve canal, PETRA was better than MPRAGE at all segments and best at labyrinthine. PETRA would be useful for the visualization of intracranial artery and facial nerve canal.

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