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ECR 2018 / C-0409
Radiographer Award
Simultaneous Acquisition of MR Elastography and Two-point Dixon Imaging
Congress: ECR 2018
Poster No.: C-0409
Type: Scientific Exhibit
Keywords: Tissue characterisation, Imaging sequences, Radiographers, Musculoskeletal system, MR-Elastography
Authors: T. Numano1, D. Ito2, K. Takamoto3, K. Mizuhara1, K. Igarashi4, T. Ueki4, T. Habe4, M. Misawa5, H. Nishijyou3; 1Tokyo/JP, 2Arakawaku, Tokyoto/JP, 3Toyama/JP, 4Arakawa-ku, Tokyo/JP, 5Ibaraki/JP
DOI:10.1594/ecr2018/C-0409

Aims and objectives

 In the present study, we demonstrate a simple technique of MR elastography (MRE) which enable MRE and a two-point Dixon imaging simultaneously based on a conventional gradient-echo MR sequence. 

 

 It is well known that many pathologies cause changes in tissue elasticity, and tissue palpation is one of the most fundamental diagnostic tools employed by physicians. However, palpation is subjective, and not all tissues are accessible to the physician's probing, for example, it is virtually impossible to palpate deeper tissues. With that in mind, MRE might be noninvasive, and provide quantitative information on tissue stiffness.

 

 Fat is often a source of problems in MR imaging. It tends to have high signal intensity at all contrasts, which could mask image changes reflecting various tissue pathologies. It also causes two types of artifacts due to its structure, known as a chemical shift artefact and a phase cancellation artifact. Since these artifacts similarly affect to MRE, a fat suppression technique is required in all MRE sequences.

 

 Low back pain (LBP) is a common disorder involving the lumbar muscles. The most common form of low back pain is non-specific low back pain, in which pathoanatomical causes of the pain cannot be determined. Some investigators have suggested that fatty degeneration of the paraspinal muscles in patients with LBP[1]. In the case of shoulder, fatty degeneration of the rotator cuff muscles has been proved to be a relevant predictor of outcome after surgery[2].

 

 Combining MRE and Dixon method makes chemical shift artefact suppression and furthermore it can be used to assess skeletal muscle fat degeneration.

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