Kumiko Koyama MD, Presenter: Nothing to Disclose

Ryutarou Ukisu MD, Abstract Co-Author: Nothing to Disclose

Kota Watanabe, Abstract Co-Author: Nothing to Disclose

Noriko Sunaoshi, Abstract Co-Author: Nothing to Disclose

Megumi Tanisaka, Abstract Co-Author: Nothing to Disclose

Tamio Kushihashi MD, Abstract Co-Author: Nothing to Disclose

Over the last 30 years MR imaging has been used as a powerful diagnostic tool, However, it remains subject to several artifacts.The purpose of this exhibit is: 1. Knowing of various artifacts, causes, measures on MRI. 2. To avoid misdiagnosing artifacts as a lesion. 3. To reduce unnecessary additional examination and follow-up studies.

Contents 1. Introduction: overview 2. Common and uncommon artifacts on MRI: causes and measures - Aliasing artifact - Chemical shift artifact - Flow artifact - Magic angle phenomenon - Moire fringles artifact -Motion artifact - Stripe artifact - Susceptibility artifact - Third-arm artifact -Truncation artifact 3. Summary: to the future

There have been known several artifacts on MRI. These artifacts can lead to a misdiagnosis, thus, radiologists and radiation technologists should be aware, and be able to avoid or reduce these artifacts. In this exhibit, we will discuss common and uncommon artifacts on several MR imaging sequences based on a theoretical analysis. By identifying these artifacts and their measures, we believe that our exhibit will contribute to make an accurate diagnosis as well as to promote medical cost effectiv

Koyama, K, Ukisu, R, Watanabe, K, Sunaoshi, N, Tanisaka, M, Kushihashi, T, Various Significant Artifacts on MRI: Tips of Causes and Measures.  Radiological Society of North America 2011 Scientific Assembly and Annual Meeting, November 26 - December 2, 2011 ,Chicago IL. http://archive.rsna.org/2011/11007567.html