The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis
Background and objectiveThis study aimed to assess the impact of upsampling and downsampling techniques on the noise characteristics and similarity metrics of scintigraphic images in nuclear medical imaging.MethodsA physical phantom study using dynamic imaging was used to generate reproducible stati...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Nuclear Medicine |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fnume.2024.1505377/full |
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| author | Siraj Ghassel Amir Jabbarpour Jochen Lang Eric Moulton Eric Moulton Ran Klein Ran Klein Ran Klein Ran Klein |
| author_facet | Siraj Ghassel Amir Jabbarpour Jochen Lang Eric Moulton Eric Moulton Ran Klein Ran Klein Ran Klein Ran Klein |
| author_sort | Siraj Ghassel |
| collection | DOAJ |
| description | Background and objectiveThis study aimed to assess the impact of upsampling and downsampling techniques on the noise characteristics and similarity metrics of scintigraphic images in nuclear medical imaging.MethodsA physical phantom study using dynamic imaging was used to generate reproducible static images of varying count statistics. Naïve upsampling and downsampling with linear interpolation were compared against alternative methods based on the preservation of Poisson count statistics and principles of nuclear scintigraphic imaging; namely, linear interpolation with a Poisson resampling correction (upsampling) and a sliding window summation method (downsampling). For each resizing method, we computed the similarity of resized images to count-matched images acquired at the target grid size with the structural similarity index measure and the logarithm of the mean squared error. These image quality metrics were subsequently compared to those of two independent count-matched images at the target grid size (representing variance due to natural noise permutations) as a reference to establish an optimal resizing method.ResultsOnly upsampled images with the Poisson resampling correction after linear interpolation produced images that were similar to those acquired at the target grid size. For downsampling, both linear interpolation and sliding window summation yielded similar outcomes for a reduction factor of 2. However, for a reduction factor of 4, only sliding window summation resulted in image similarity metrics in agreement with those at the target grid size.ConclusionsThe study underlines the importance of applying appropriate resizing techniques in nuclear medical imaging to produce realistic images at the target grid size. |
| format | Article |
| id | doaj-art-9795b6531e7e434891fee04a2a07c021 |
| institution | Kabale University |
| issn | 2673-8880 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Nuclear Medicine |
| spelling | doaj-art-9795b6531e7e434891fee04a2a07c0212025-02-06T07:09:48ZengFrontiers Media S.A.Frontiers in Nuclear Medicine2673-88802025-02-01410.3389/fnume.2024.15053771505377The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysisSiraj Ghassel0Amir Jabbarpour1Jochen Lang2Eric Moulton3Eric Moulton4Ran Klein5Ran Klein6Ran Klein7Ran Klein8Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, CanadaDepartment of Physics, Carleton University, Ottawa, ON, CanadaElectrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, CanadaElectrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, CanadaJubilant DraxImage Inc., Kirkland, QC, CanadaElectrical Engineering and Computer Science, University of Ottawa, Ottawa, ON, CanadaDepartment of Physics, Carleton University, Ottawa, ON, CanadaDivision of Nuclear Medicine and Molecular Imaging, Faculty of Medicine, University of Ottawa, Ottawa, ON, CanadaDepartment of Nuclear Medicine and Molecular Imaging, The Ottawa Hospital, Ottawa, ON, CanadaBackground and objectiveThis study aimed to assess the impact of upsampling and downsampling techniques on the noise characteristics and similarity metrics of scintigraphic images in nuclear medical imaging.MethodsA physical phantom study using dynamic imaging was used to generate reproducible static images of varying count statistics. Naïve upsampling and downsampling with linear interpolation were compared against alternative methods based on the preservation of Poisson count statistics and principles of nuclear scintigraphic imaging; namely, linear interpolation with a Poisson resampling correction (upsampling) and a sliding window summation method (downsampling). For each resizing method, we computed the similarity of resized images to count-matched images acquired at the target grid size with the structural similarity index measure and the logarithm of the mean squared error. These image quality metrics were subsequently compared to those of two independent count-matched images at the target grid size (representing variance due to natural noise permutations) as a reference to establish an optimal resizing method.ResultsOnly upsampled images with the Poisson resampling correction after linear interpolation produced images that were similar to those acquired at the target grid size. For downsampling, both linear interpolation and sliding window summation yielded similar outcomes for a reduction factor of 2. However, for a reduction factor of 4, only sliding window summation resulted in image similarity metrics in agreement with those at the target grid size.ConclusionsThe study underlines the importance of applying appropriate resizing techniques in nuclear medical imaging to produce realistic images at the target grid size.https://www.frontiersin.org/articles/10.3389/fnume.2024.1505377/fullnuclear medicinescintigraphyimage processingimage resizingimage noise |
| spellingShingle | Siraj Ghassel Amir Jabbarpour Jochen Lang Eric Moulton Eric Moulton Ran Klein Ran Klein Ran Klein Ran Klein The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis Frontiers in Nuclear Medicine nuclear medicine scintigraphy image processing image resizing image noise |
| title | The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis |
| title_full | The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis |
| title_fullStr | The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis |
| title_full_unstemmed | The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis |
| title_short | The effect of resizing on the natural appearance of scintigraphic images: an image similarity analysis |
| title_sort | effect of resizing on the natural appearance of scintigraphic images an image similarity analysis |
| topic | nuclear medicine scintigraphy image processing image resizing image noise |
| url | https://www.frontiersin.org/articles/10.3389/fnume.2024.1505377/full |
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