JKMRS Volume 24, No 3, pp 66, Partial Solution for Concomitant... | |
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2020년 09월 20일 / 조회수: 489 | |
Partial Solution for Concomitant Gradient
Field in Ultra-low Magnetic Field: Correction of Distortion Artifact Seong-Joo Lee and Jeong Hyun Shim* Quantum Magnetic Imaging Team, Korea Research Institute
of Standards and Science (KRISS), 267, Gajeong-ro, Yuseong-gu, Daejeon 34113,
Republic of Korea Received Sep 14, 2020; Revised
Sep 16, 2020; Accepted Sep 16, 2020 Abstract In
ultra-low field magnetic resonance imaging (ULF-MRI), the strength of a static
magnetic field can be comparable to that of gradient field. On that occasion, the
gradient field is accompanied by concomitant gradient field, which yields distortion
and blurring artifacts on MR images. Here, we focused on the distortion
artifact and derived the equations capable of correcting it. Its usefulness was
confirmed through the corrections in both simulated and experimental images.
This solution will be effective for acquiring more accurate images in low
and/or ultra-low magnetic fields. Keywords ULF-NMR, ULF-MRI, Concomitant
gradient field
* Address correspondence to: Jeong Hyun Shim, Quantum Magnetic Imaging Team, Korea Research
Institute of Standards and Science (KRISS), 267, Gajeong-ro, Yuseong-gu,
Daejeon 34113, Republic of Korea, Tel: 82-42-350-1038; E-mail: jhshim@kriss.re.kr |
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첨부파일 | 01-JKMRS-SJ_Lee.pdf |