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Effects of MR surface coils on PET quantification

By Lawrence R. MacDonald, Steve Kohlmyer, Chi Liu, Thomas K. Lewellen and Paul E. Kinahan

Abstract

Purpose: The goal of this work was to investigate the effects of MRI surface coils on attenuation-corrected PET emission data. The authors studied the cases where either an MRI or a CT scan would be used to provide PET attenuation correction (AC). Combined MR∕PET scanners that use the MRI for PET AC (MR-AC) face the challenge of absent surface coils in MR images and thus cannot directly account for attenuation in the coils. Combining MR and PET images could be achieved by transporting the subject on a stereotactically registered table between independent MRI and PET scanners. In this case, conventional PET CT-AC methods could be used. A challenge here is that high atomic number materials within MR coils cause artifacts in CT images and CT based AC is typically not validated for coil materials

Topics: Nuclear Medicine Physics
Publisher: American Association of Physicists in Medicine
OAI identifier: oai:pubmedcentral.nih.gov:3117895
Provided by: PubMed Central
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