Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images
Single-photon emission computed tomography (SPECT) images can significantly help physicians in diagnosing patients with coronary artery or suspected coronary artery diseases. However, these images are grayscale with qualities that are not readily visible. The objective of this study was to evaluate...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Journal of Imaging |
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| Online Access: | https://www.mdpi.com/2313-433X/8/12/331 |
| _version_ | 1797456906857480192 |
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| author | Abdurrahim Rahimian Mahnaz Etehadtavakol Masoud Moslehi Eddie Y. K. Ng |
| author_facet | Abdurrahim Rahimian Mahnaz Etehadtavakol Masoud Moslehi Eddie Y. K. Ng |
| author_sort | Abdurrahim Rahimian |
| collection | DOAJ |
| description | Single-photon emission computed tomography (SPECT) images can significantly help physicians in diagnosing patients with coronary artery or suspected coronary artery diseases. However, these images are grayscale with qualities that are not readily visible. The objective of this study was to evaluate the effectiveness of different pseudo-coloring algorithms of myocardial perfusion SPECT images. Data were collected using a Siemens Symbia T2 dual-head SPECT/computed tomography (CT) scanner. After pseudo-coloring, the images were assessed both qualitatively and quantitatively. The qualities of different pseudo-color images were examined by three experts, while the images were evaluated quantitatively by obtaining indices such as mean squared error (MSE), peak signal-to-noise ratio (PSNR), normalized color difference (NCD), and structure similarity index metric (SSIM). The qualitative evaluation demonstrated that the warm color map (WCM), followed by the jet color map, outperformed the remaining algorithms in terms of revealing the non-visible qualities of the images. Furthermore, the quantitative evaluation results demonstrated that the WCM had the highest PSNR and SSIM but the lowest MSE. Overall, the WCM could outperform the other color maps both qualitatively and quantitatively. The novelty of this study includes comparing different pseudo-coloring methods to improve the quality of myocardial perfusion SPECT images and utilizing our collected datasets. |
| first_indexed | 2024-03-09T16:14:35Z |
| format | Article |
| id | doaj.art-20bc6fac08df4875bb4ba94035ccd583 |
| institution | Directory Open Access Journal |
| issn | 2313-433X |
| language | English |
| last_indexed | 2024-03-09T16:14:35Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Imaging |
| spelling | doaj.art-20bc6fac08df4875bb4ba94035ccd5832023-11-24T15:52:19ZengMDPI AGJournal of Imaging2313-433X2022-12-0181233110.3390/jimaging8120331Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography ImagesAbdurrahim Rahimian0Mahnaz Etehadtavakol1Masoud Moslehi2Eddie Y. K. Ng3Department of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81745-33871, IranDepartment of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81745-33871, IranDepartment of Medical Physics, School of Medicine, Isfahan University of Medical Sciences, Isfahan 81745-33871, IranSchool of Mechanical and Aerospace Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeSingle-photon emission computed tomography (SPECT) images can significantly help physicians in diagnosing patients with coronary artery or suspected coronary artery diseases. However, these images are grayscale with qualities that are not readily visible. The objective of this study was to evaluate the effectiveness of different pseudo-coloring algorithms of myocardial perfusion SPECT images. Data were collected using a Siemens Symbia T2 dual-head SPECT/computed tomography (CT) scanner. After pseudo-coloring, the images were assessed both qualitatively and quantitatively. The qualities of different pseudo-color images were examined by three experts, while the images were evaluated quantitatively by obtaining indices such as mean squared error (MSE), peak signal-to-noise ratio (PSNR), normalized color difference (NCD), and structure similarity index metric (SSIM). The qualitative evaluation demonstrated that the warm color map (WCM), followed by the jet color map, outperformed the remaining algorithms in terms of revealing the non-visible qualities of the images. Furthermore, the quantitative evaluation results demonstrated that the WCM had the highest PSNR and SSIM but the lowest MSE. Overall, the WCM could outperform the other color maps both qualitatively and quantitatively. The novelty of this study includes comparing different pseudo-coloring methods to improve the quality of myocardial perfusion SPECT images and utilizing our collected datasets.https://www.mdpi.com/2313-433X/8/12/331pseudo-coloringquality assessmentquantitative indicatorsSPECT image |
| spellingShingle | Abdurrahim Rahimian Mahnaz Etehadtavakol Masoud Moslehi Eddie Y. K. Ng Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images Journal of Imaging pseudo-coloring quality assessment quantitative indicators SPECT image |
| title | Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images |
| title_full | Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images |
| title_fullStr | Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images |
| title_full_unstemmed | Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images |
| title_short | Comparing Different Algorithms for the Pseudo-Coloring of Myocardial Perfusion Single-Photon Emission Computed Tomography Images |
| title_sort | comparing different algorithms for the pseudo coloring of myocardial perfusion single photon emission computed tomography images |
| topic | pseudo-coloring quality assessment quantitative indicators SPECT image |
| url | https://www.mdpi.com/2313-433X/8/12/331 |
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