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Fabrication and evaluation of bilateral Helmholtz radiofrequency coil for thermo-stable breast image with reduced artifacts

Authors
 Young Han Lee  ;  Kyu-Ho Song  ;  Jaemoon Yang  ;  Won Jun Kang  ;  Keum Sil Lee  ;  Min Jung Kim  ;  Eun-Kyung Kim  ;  Dan Heo  ;  Bo-Young Choe  ;  Jin-Suck Suh 
Citation
 JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS, Vol.23(1) : e13483, 2022-01 
Journal Title
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS
Issue Date
2022-01
MeSH
Artifacts* ; Breast* / diagnostic imaging ; Humans ; Magnetic Resonance Imaging ; Phantoms, Imaging ; Positron-Emission Tomography
Keywords
breast imaging ; magnetic resonance imaging ; metallic artifact ; positron emission tomography ; radiofrequency coil
Abstract
Purpose: The positron emission tomography (PET)-magnetic resonance (MR) system is a newly emerging technique that yields hybrid images with high-resolution anatomical and metabolic information. With PET-MR imaging, a definitive diagnosis of breast abnormalities will be possible with high spatial accuracy and images will be acquired for the optimal fusion of anatomic locations. Therefore, we propose a PET-compatible two-channel breast MR coil with minimal disturbance to image acquisition which can be used for simultaneous PET-MR imaging in patients with breast cancer.

Materials and methods: For coil design and construction, the conductor loops of the Helmholtz coil were tuned, matched, and subdivided with nonmagnetic components. Element values were optimized with an electromagnetic field simulation. Images were acquired on a GE 600 PET-computed tomography (CT) and GE 3.0 T MR system. For this study, we used the T1-weighted image (volunteer; repetition time (TR), 694 ms; echo time (TE), 9.6 ms) and T2-weighted image (phantom; TR, 8742 ms; TE, 104 ms) with the fast spin-echo sequence.

Results: The results of measuring image factors with the proposed radiofrequency (RF) coil and standard conventional RF coil were as follows: signal-to-noise ratio (breast; 207.7 vs. 175.2), percent image uniformity (phantom; 89.22%-91.27% vs. 94.63%-94.77%), and Hounsfield units (phantom; -4.51 vs. 2.38).

Conclusions: Our study focused on the feasibility of proposed two-channel Helmholtz loops (by minimizing metallic components and soldering) for PET-MR imaging and found the comparable image quality to the standard conventional coil. We believe our work will help significantly to improve image quality with the development of a less metallic breast MR coil.
Files in This Item:
T202200219.pdf Download
DOI
10.1002/acm2.13483
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kang, Won Jun(강원준) ORCID logo https://orcid.org/0000-0002-2107-8160
Kim, Min Jung(김민정) ORCID logo https://orcid.org/0000-0003-4949-1237
Kim, Eun-Kyung(김은경) ORCID logo https://orcid.org/0000-0002-3368-5013
Suh, Jin Suck(서진석) ORCID logo https://orcid.org/0000-0001-9455-9240
Yang, Jae Moon(양재문) ORCID logo https://orcid.org/0000-0001-7365-0395
Lee, Young Han(이영한) ORCID logo https://orcid.org/0000-0002-5602-391X
Heo, Dan(허단)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/187889
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