Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations
A comparison was made between the image quality of a photon-counting CT (PCCT) and a dual-source CT (DSCT). The evaluation of image quality was performed using a Catphan CT phantom, and the physical metrics, such as the noise power spectrum and task transfer function, were measured for both PCCT and...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Diagnostics |
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| Online Access: | https://www.mdpi.com/2075-4418/13/7/1325 |
| _version_ | 1797608189926047744 |
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| author | Marine Deleu Jean-Baptiste Maurice Laura Devos Martine Remy François Dubus |
| author_facet | Marine Deleu Jean-Baptiste Maurice Laura Devos Martine Remy François Dubus |
| author_sort | Marine Deleu |
| collection | DOAJ |
| description | A comparison was made between the image quality of a photon-counting CT (PCCT) and a dual-source CT (DSCT). The evaluation of image quality was performed using a Catphan CT phantom, and the physical metrics, such as the noise power spectrum and task transfer function, were measured for both PCCT and DSCT at three CT dose indices (1, 5 and 10 mGy). Polyenergetic and virtual monoenergetic reconstructions were used to evaluate the performance differences by simulating a Gaussian spot with a radius of 5 mm and calculating the detectability index. The highest iterative reconstruction level was able to decrease the noise by about 70% compared with the filtered back projection using a parenchyma reconstruction kernel. The PCCT task transfer functions remained constant, while those of the DSCT increased with the reconstruction strength level. At monoenergetic 70 keV, a 50% decrease in noise was observed for DSCT with image smoothing, while PCCT had the same 50% decrease in noise without any smoothing. The PCCT detectability index at a reconstruction strength level of two was equivalent to the highest level of ADMIRE 5 for DSCT. The PCCT showed its superiority over the DSCT, especially for lung nodule detection. |
| first_indexed | 2024-03-11T05:39:55Z |
| format | Article |
| id | doaj.art-7a86942cf84e4f20b2bbb977f582bb9b |
| institution | Directory Open Access Journal |
| issn | 2075-4418 |
| language | English |
| last_indexed | 2024-03-11T05:39:55Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diagnostics |
| spelling | doaj.art-7a86942cf84e4f20b2bbb977f582bb9b2023-11-17T16:31:01ZengMDPI AGDiagnostics2075-44182023-04-01137132510.3390/diagnostics13071325Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT ExaminationsMarine Deleu0Jean-Baptiste Maurice1Laura Devos2Martine Remy3François Dubus4Medical Physics Department, University Hospital, 59037 Lille, FranceMedical Physics Department, University Hospital, 59037 Lille, FranceMedical Physics Department, University Hospital, 59037 Lille, FranceRadiology Department, Heart-Lung Institute, University Hospital, 59037 Lille, FranceMedical Physics Department, University Hospital, 59037 Lille, FranceA comparison was made between the image quality of a photon-counting CT (PCCT) and a dual-source CT (DSCT). The evaluation of image quality was performed using a Catphan CT phantom, and the physical metrics, such as the noise power spectrum and task transfer function, were measured for both PCCT and DSCT at three CT dose indices (1, 5 and 10 mGy). Polyenergetic and virtual monoenergetic reconstructions were used to evaluate the performance differences by simulating a Gaussian spot with a radius of 5 mm and calculating the detectability index. The highest iterative reconstruction level was able to decrease the noise by about 70% compared with the filtered back projection using a parenchyma reconstruction kernel. The PCCT task transfer functions remained constant, while those of the DSCT increased with the reconstruction strength level. At monoenergetic 70 keV, a 50% decrease in noise was observed for DSCT with image smoothing, while PCCT had the same 50% decrease in noise without any smoothing. The PCCT detectability index at a reconstruction strength level of two was equivalent to the highest level of ADMIRE 5 for DSCT. The PCCT showed its superiority over the DSCT, especially for lung nodule detection.https://www.mdpi.com/2075-4418/13/7/1325photon countingiterative reconstruction algorithmnoise power spectrumtask transfer functiondetectability index |
| spellingShingle | Marine Deleu Jean-Baptiste Maurice Laura Devos Martine Remy François Dubus Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations Diagnostics photon counting iterative reconstruction algorithm noise power spectrum task transfer function detectability index |
| title | Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations |
| title_full | Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations |
| title_fullStr | Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations |
| title_full_unstemmed | Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations |
| title_short | Image Quality Analysis of Photon-Counting CT Compared with Dual-Source CT: A Phantom Study for Chest CT Examinations |
| title_sort | image quality analysis of photon counting ct compared with dual source ct a phantom study for chest ct examinations |
| topic | photon counting iterative reconstruction algorithm noise power spectrum task transfer function detectability index |
| url | https://www.mdpi.com/2075-4418/13/7/1325 |
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