Dental imaging in clinical photon-counting CT at a quarter of DVT dose

• Verfasst von: Sawall, Stefan [VerfasserIn]
• Verfasst von: Maier, Joscha [VerfasserIn]
• Verfasst von: Şen, Sinan [VerfasserIn]
• Verfasst von: Gehrig, Holger [VerfasserIn]
• Verfasst von: Kim, Ti-Sun [VerfasserIn]
• Verfasst von: Schlemmer, Heinz-Peter [VerfasserIn]
• Verfasst von: Schönberg, Stefan [VerfasserIn]
• Verfasst von: Kachelrieß, Marc [VerfasserIn]
• Verfasst von: Rütters, Maurice [VerfasserIn]
• Titel: Dental imaging in clinical photon-counting CT at a quarter of DVT dose
• Verf.angabe: Stefan Sawall, Joscha Maier, Sinan Sen, Holger Gehrig, Ti-Sun Kim, Heinz-Peter Schlemmer, Stefan O. Schönberg, Marc Kachelrieß, Maurice Rütters
• E-Jahr: 2024
• Jahr: March 2024
• Umfang: 5 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 30.07.2024 ; Online verfügbar: 23. Januar 2024, Artikelversion: 1. Februar 2024
• Titel Quelle: Enthalten in: Journal of dentistry
• Ort Quelle: Amsterdam [u.a.] : Elsevier Science, 1972
• Jahr Quelle: 2024
• Band/Heft Quelle: 142(2024) vom: März, Artikel-ID 104859, Seite 1-5
• ISSN Quelle: 1879-176X
• DOI: doi:10.1016/j.jdent.2024.104859
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Dental imaging
• Sach-SW: Photon-counting CT
• Sach-SW: Radiation dose
• K10plus-PPN: 1896924956

Abstract

Objective - To investigate the image quality of a low-dose dental imaging protocol in the first clinical photon-counting computed tomography (PCCT) system in comparison to a normal-dose acquisition in a digital volume tomography (DVT) system. - Materials and methods - Clinical PCCT systems offer an increased spatial resolution compared to previous generations of clinical systems. Their spatial resolution is in the order of dental DVT systems. Resolution-matched acquisitions of ten porcine jaws were performed in a PCCT (Naeotom Alpha, Siemens Healthineers) and in a DVT (Orthophos XL, Dentsply Sirona). PCCT images were acquired with 90 kV at a dose of 1 mGy CTDI16 cm. DVT used 85 kV at 4 mGy. Image reconstruction was performed using the standard algorithms of each system to a voxel size of 160 × 160 × 200 µm. The dose-normalized contrast-to-noise ratio (CNRD) was measured between dentine and enamel and dentine and bone. Two readers evaluated overall diagnostic quality of images and quality of relevant structures such as root channels and dentine. - Results - CNRD is higher in all PCCT acquisitions. CNRD is 37 % higher for the contrast dentine-enamel and 31 % higher for the dentine-bone contrast (p < 0.05). Overall diagnostic image quality was higher for PCCT over DVT (p < 0.02 and p < 0.04 for readers 1 and 2). Quality scores for anatomical structures were higher in PCCT compared to DVT (all p < 0.05). Inter- and intrareader reproducibility were acceptable (all ICC>0.64). - Conclusions - PCCT provides an increased image quality over DVT even at a lower dose level and might enable complex dental imaging protocols in the future. - Clinical significance - The evolution of photon-counting technology and it's optimization will increasingly move dental imaging towards standardized 3D visualizations providing both minimal radiation exposure and high diagnostic accuracy.