Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition
This study aimed to analyze the applicability of the improved median filter in positron emission tomography (PET)/magnetic resonance (MR) fusion images based on parallel imaging using generalized autocalibrating partially parallel acquisition (GRAPPA). In this study, a PET/MR fusion imaging system b...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | Nuclear Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1738573322004491 |
| _version_ | 1797955417987350528 |
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| author | Chanrok Park Jae-Young Kim Chang-Hyeon An Youngjin Lee |
| author_facet | Chanrok Park Jae-Young Kim Chang-Hyeon An Youngjin Lee |
| author_sort | Chanrok Park |
| collection | DOAJ |
| description | This study aimed to analyze the applicability of the improved median filter in positron emission tomography (PET)/magnetic resonance (MR) fusion images based on parallel imaging using generalized autocalibrating partially parallel acquisition (GRAPPA). In this study, a PET/MR fusion imaging system based on a 3.0T magnetic field and 18F radioisotope were used. An improved median filter that can set a mask of the median value more efficiently than before was modeled and applied to the acquired image. As quantitative evaluation parameters of the noise level, the contrast to noise ratio (CNR) and coefficient of variation (COV) were calculated. Additionally, no-reference-based evaluation parameters were used to analyze the overall image quality. We confirmed that the CNR and COV values of the PET/MR fusion images to which the improved median filter was applied improved by approximately 3.32 and 2.19 times on average, respectively, compared to the noisy image. In addition, the no-reference-based evaluation results showed a similar trend for the noise-level results. In conclusion, we demonstrated that it can be supplemented by using an improved median filter, which suggests the problem of image quality degradation of PET/MR fusion images that shortens scan time using GRAPPA. |
| first_indexed | 2024-04-10T23:32:49Z |
| format | Article |
| id | doaj.art-6373b63d14c44dc49f48e240021aa06a |
| institution | Directory Open Access Journal |
| issn | 1738-5733 |
| language | English |
| last_indexed | 2024-04-10T23:32:49Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Engineering and Technology |
| spelling | doaj.art-6373b63d14c44dc49f48e240021aa06a2023-01-12T04:18:42ZengElsevierNuclear Engineering and Technology1738-57332023-01-01551222228Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisitionChanrok Park0Jae-Young Kim1Chang-Hyeon An2Youngjin Lee3Department of Radiological Science, Eulji University, Gyeonggi-do, Republic of KoreaDepartment of Biochemistry, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of KoreaDepartment of Oral and Maxillofacial Radiology, School of Dentistry, IHBR, Kyungpook National University, Daegu, Republic of KoreaDepartment of Radiological Science, Gachon University, Incheon, Republic of Korea; Corresponding author. Department of Radiological Science, Gachon University, 191, Hambakmoero, Yeonsu-gu, Incheon, Republic of Korea.This study aimed to analyze the applicability of the improved median filter in positron emission tomography (PET)/magnetic resonance (MR) fusion images based on parallel imaging using generalized autocalibrating partially parallel acquisition (GRAPPA). In this study, a PET/MR fusion imaging system based on a 3.0T magnetic field and 18F radioisotope were used. An improved median filter that can set a mask of the median value more efficiently than before was modeled and applied to the acquired image. As quantitative evaluation parameters of the noise level, the contrast to noise ratio (CNR) and coefficient of variation (COV) were calculated. Additionally, no-reference-based evaluation parameters were used to analyze the overall image quality. We confirmed that the CNR and COV values of the PET/MR fusion images to which the improved median filter was applied improved by approximately 3.32 and 2.19 times on average, respectively, compared to the noisy image. In addition, the no-reference-based evaluation results showed a similar trend for the noise-level results. In conclusion, we demonstrated that it can be supplemented by using an improved median filter, which suggests the problem of image quality degradation of PET/MR fusion images that shortens scan time using GRAPPA.http://www.sciencedirect.com/science/article/pii/S1738573322004491Positron emission tomography (PET)Magnetic resonance (MR)fusion imaging systemFast magnetic resonance imaging (MRI)Generalized autocalibrating partially parallel acquisition (GRAPPA)Improved median filter |
| spellingShingle | Chanrok Park Jae-Young Kim Chang-Hyeon An Youngjin Lee Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition Nuclear Engineering and Technology Positron emission tomography (PET) Magnetic resonance (MR) fusion imaging system Fast magnetic resonance imaging (MRI) Generalized autocalibrating partially parallel acquisition (GRAPPA) Improved median filter |
| title | Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition |
| title_full | Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition |
| title_fullStr | Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition |
| title_full_unstemmed | Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition |
| title_short | Feasibility study of improved median filtering in PET/MR fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition |
| title_sort | feasibility study of improved median filtering in pet mr fusion images with parallel imaging using generalized autocalibrating partially parallel acquisition |
| topic | Positron emission tomography (PET) Magnetic resonance (MR) fusion imaging system Fast magnetic resonance imaging (MRI) Generalized autocalibrating partially parallel acquisition (GRAPPA) Improved median filter |
| url | http://www.sciencedirect.com/science/article/pii/S1738573322004491 |
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