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Multispectral diffusion-weighted imaging near metal implants. Magn Reson Med 2018 Feb;79(2):987-993

Date

05/05/2017

Pubmed ID

28470795

DOI

10.1002/mrm.26737

Scopus ID

2-s2.0-85018328723   13 Citations

Abstract

PURPOSE: The need for diffusion-weighted-imaging (DWI) near metallic implants is becoming increasingly relevant for a variety of clinical diagnostic applications. Conventional DWI methods are significantly hindered by metal-induced image artifacts. A novel approach relying on multispectral susceptibility artifact reduction techniques is presented to address this unmet need.

METHODS: DWI near metal implants is achieved through a combination of several advanced MRI acquisition technologies. Previously described approaches to Carr-Purcell-Meiboom-Gill spin-echo train DWI sequences using the periodically rotated overlapping parallel lines with enhanced reconstruction are combined with multispectral-imaging metal artifact reduction principles to provide DWI with substantially reduced artifact levels. The presented methods are applied to limited sets of slices over areas of sarcoma risk near six implanted devices.

RESULTS: Using the presented methods, DWI assessment without bulk image distortions is demonstrated in the immediate vicinity of metallic interfaces. In one subject, the apparent diffusion coefficient was reduced in a region of suspected sarcoma directly adjacent to fixation hardware.

CONCLUSIONS: An initial demonstration of minimal-artifact multispectral DWI in the near vicinity of metallic hardware is described and successfully demonstrated on clinical subjects. Magn Reson Med 79:987-993, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

Author List

Koch KM, Bhave S, Gaddipati A, Hargreaves BA, Gui D, Peters R, Bedi M, Mannem R, Kaushik SS

Authors

Manpreet Bedi MD, MS Associate Professor in the Radiation Oncology department at Medical College of Wisconsin
Kevin M. Koch PhD Center Director, Professor in the Radiology department at Medical College of Wisconsin
Rajeev Mannem MD Chief, Associate Professor in the Radiology department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Ankle
Artifacts
Diffusion Magnetic Resonance Imaging
Humans
Image Processing, Computer-Assisted
Joint Prosthesis
Metals
Prostheses and Implants
Sarcoma