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Image quality of opportunistic breast examinations in photon-counting computed tomography: a phantom study

Purpose - To compare the breast imaging performance of a clinical whole-body photon-counting CT (PCCT) to that of a dedicated breast CT (BCT) to determine the image quality of opportunistic breast examinations in clinical PCCT. - Materials and methods - To quantify image quality for breast cancer ap...

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Hauptverfasser: Sawall, Stefan (VerfasserIn) , Baader, E. (VerfasserIn) , Wolf, J. (VerfasserIn) , Maier, J. (VerfasserIn) , Schlemmer, Heinz-Peter (VerfasserIn) , Schönberg, Stefan (VerfasserIn) , Sechopoulos, I. (VerfasserIn) , Kachelrieß, Marc (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: June 2024
In: Physica medica
Year: 2024, Jahrgang: 122, Pages: 1-7
ISSN:1724-191X
DOI:10.1016/j.ejmp.2024.103378
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.ejmp.2024.103378
Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S112017972400173X
Volltext
Verfasserangaben:S. Sawall, E. Baader, J. Wolf, J. Maier, H.-P. Schlemmer, S.O. Schönberg, I. Sechopoulos, M. Kachelrieß
Beschreibung
Zusammenfassung:Purpose - To compare the breast imaging performance of a clinical whole-body photon-counting CT (PCCT) to that of a dedicated breast CT (BCT) to determine the image quality of opportunistic breast examinations in clinical PCCT. - Materials and methods - To quantify image quality for breast cancer applications, acquisitions of a breast phantom including representations of calcifications, fibers, and masses were performed using a clinical PCCT and a dedicated BCT. When imaging with the PCCT, the phantom was also combined with a thorax phantom to simulate realistic patient positioning, while only the breast phantom was imaged in the BCT. Images in BCT were acquired at 7.0 mGy (CTDI16cm) and using 2.6 mGy-25.0 mGy in the PCCT. Spatial resolution between the BCT and PCCT images was matched and data were reconstructed using the default methods of each system. The dose-normalized contrast-to-noise ratio (CNRD) of masses and the structural visibility of fibers and calcifications were evaluated as figures of merit for all reconstructions. - Results - CNRD between masses and background was 0.56 mGy-½, on average with BCT and varied between 0.39 mGy-½ to 1.46 mGy-½ with PCCT over all dose levels, phantom configurations, and reconstruction algorithms. Calcifications down to a size of 0.29 mm and fibers down to a size of 0.23 mm could be reliably identified in the images of both systems. - Conclusions - Clinical PCCT provides an image quality superior to that obtained with BCT in terms of CNRD and allows for the identification of calcifications and fibers at comparable dose levels.
Beschreibung:Online verfügbar: 25. Mai 2024
Gesehen am 25.11.2024
Beschreibung:Online Resource
ISSN:1724-191X
DOI:10.1016/j.ejmp.2024.103378

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