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논문 기본 정보

자료유형
학술저널
저자정보
Suchit Kumar (Research Institute for Advanced Industrial Technology Korea University Sejong Korea) Jong-Min Kim (Research Institute for Advanced Industrial Technology Korea University Sejong Korea) Jang Gyu Cha (Department of Radiology Soonchunhyang University Bucheon Hospital Bucheon Korea) Ji Young Hwang (Department of Radiology Ewha Women’s University Mokdong Hospital Seoul Korea) Seung Eun Jung (Department of Radiology The Catholic University of Korea St. Mary's Hospital Seoul Korea) Chulhyun Lee (Bioimaging Research Team Korea Basic Science Institute Cheongju Korea) Chang-Hyun Oh (Department of Electronics and Information Engineering Korea University Sejong Korea)
저널정보
대한자기공명의과학회 Investigative Magnetic Resonance Imaging Investigative Magnetic Resonance Imaging 제27권 제1호
발행연도
2023.3
수록면
10 - 20 (11page)

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초록· 키워드

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Purpose: To propose a novel standard magnetic resonance imaging (MRI) phantom, hereafter called the Korea Magnetic Resonance Phantom-4th edition (KMRP-4). Its related quality control (QC) assessment protocols and its comparison with the American College of Radiology (ACR) phantom and its QC assessment protocols. Materials and Methods: Internally, the KMRP-4 phantom is composed of cubic and triangular vessels, brain tissue structures, and a uniform region designed to facilitate a variety of QC protocols. Using magnetic resonance (MR) images of these structures, we quantitatively evaluated a total of 10 parameters, seven from those of existing ACR protocols (i.e., geometric accuracy, high-contrast spatial resolution, slice thickness accuracy, slice position accuracy, image intensity uniformity, percent signal ghosting, and low-contrast object detectability) and three additional parameters for evaluating vessel conspicuity, brain tissue contrast, and signal-to-noise ratio (SNR) introduced in the KMRP-4 protocols. Twentytwo MRI systems of 0.32–3.0 T static magnetic field strength were tested using both ACR and KMRP-4 phantoms. Mann–Whitney U-tests were performed on the seven evaluation items of the ACR method to compare KMRP-4 and ACR methods. Results: The results of Mann–Whitney U-test demonstrated that p-values were more than 0.05 for all seven items that could be assessed with both ACR and KMRP-4, indicating similar results between the two methods. Additionally, assessments of vessel conspicuity, brain tissue contrast, and SNR using the KMRP-4 method demonstrated utility of the KMRP-4 phantom. Conclusion: A novel standard phantom and related QC methods were developed to perform objective, observer-independent, and semi-automatic QC tests. Quantitative comparisons of MR images with KMPR-4 and ACR phantoms were performed. Results demonstrated the utility of the newly proposed KMRP-4 phantom and its related QC methods.

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