Tuesday, April 16

7:00 am - 9:00 am

Booth 614 Hall D; SDCC

Add to Calendar 4/16/2019 7:00:00 AM 4/16/2019 9:00:00 AM America/Chicago 218 Common Pitfalls and Artifacts on Brain CT and MR Imaging Booth 614 Hall D; SDCC

218 Common Pitfalls and Artifacts on Brain CT and MR Imaging

Fee: $105
Advanced Practice Provider Fee: $105
Candidate and Medical Student Fee: $20

Moderator(s): Alex Mamourian, MD

Panelist(s): James Y. Chen; Robert E. Harbaugh, MD, FAANS; John Karis, MD; Seyed Ali Nabavizadeh, MD

As the relationship between radiologists and neurosurgeons has evolved with the avalanche of outside imaging and anywhere access to PACS, it is essential that neurosurgeons have the knowledge necessary to recognize common imaging pitfalls and artifacts so that they are not mistaken for pathology. During this seminar there will be four presentations reviewing artifacts and pitfalls on CNS MR, CT, MRA and CTA, as well as advanced imaging techniques such as perfusion. Each presenter will review pertinent imaging physics as well as common artifacts so that the audience is better prepared to recognize these artifacts and pitfalls in their clinical practice. Some examples of everyday artifacts: variations of beam hardening artifacts on CT, flow ghosting on MR, in plane saturation and direction of flow artifacts on MRA, pseudo-stenosis on MRA, and pseudo-occlusion on CTA. Advanced imaging artifacts include: errors in MR perfusion calculations due to susceptibility artifacts, elevated choline levels on MR spectroscopy in non neoplastic disease such as MS, and benign disease that may have elevated rCBV. Goal: Increase awareness of clinically relevant artifacts and pitfalls on both MR and CT imaging techniques so that they are not mistaken for pathology or lead to unnecessary, additional imaging. Online (free) teaching material that can be reviewed prior to the course: “Radphysics”: Log onto Instagram and enter this site with over 250 posted examples of artifacts and pitfalls on brain and spine imaging. “Top Ten MR Artifacts”: This is a free iBook available on iTunes for download. Interactive stacks of images are provided. It can be viewed on mobile devices such as iPad or iPhone. Online (free) teaching material that can be reviewed prior to the course: “Radphysics”: Log onto Instagram and enter this site with over 250 posted examples of artifacts and pitfalls on brain and spine imaging. “Top Ten MR Artifacts”: This is a free iBook available on iTunes for download. Interactive stacks of images are provided. It can be viewed on mobile devices such as iPad or iPhone.

Learning Objectives: After completing this educational activity, participants should be able to:
  • Recognize common artifacts and pitfalls of CT imaging: motion, photon starvation, beam hardening, and volume averaging with emphasis on rules that allow the viewer to differentiate these from real pathology.
  • Recognize common artifacts and pitfalls of MR imaging: ghosting, wrap around, chemical shift, flow, as well as MRA artifacts related to direction of flow and saturation.
  • Recognize limitations of CTA: poor image quality and techniques to improve images, pseudo-occlusion due to slow flow, and lack of sensitivity to enhancement in the brain.
  • Increase awareness of perfusion imaging physics and how errors in data acquisition can result in mis- interpretation of perfusion images of the brain.