| Autor: |
Deleu M; Medical Physics Department, University Hospital, 59037 Lille, France., Maurice JB; Medical Physics Department, University Hospital, 59037 Lille, France., Devos L; Medical Physics Department, University Hospital, 59037 Lille, France., Remy M; Radiology Department, Heart-Lung Institute, University Hospital, 59037 Lille, France., Dubus F; Medical Physics Department, University Hospital, 59037 Lille, France. |
| Jazyk: |
angličtina |
| Zdroj: |
Diagnostics (Basel, Switzerland) [Diagnostics (Basel)] 2023 Apr 03; Vol. 13 (7). Date of Electronic Publication: 2023 Apr 03. |
| DOI: |
10.3390/diagnostics13071325 |
| Abstrakt: |
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. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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