ESTRO 2024 - Abstract Book

S3821

Physics - Image acquisition and processing

ESTRO 2024

Conclusion:

Based on the results, Direct Density algorithm is capable of reducing metal artifacts and provides CT numbers in the presence of metal closer to real values. Direct Density algorithm can be used in conjunction with metal artifact reduction calculation algorithms like iMAR (Siemens) to mitigate the impact of metal artifacts.

Keywords: image reconstruction, CT scan.

References:

1. Ritter A, Mistry N. DirectDensity™: Technical principles and implications for radiotherapy – white paper. Tech. Rep. (Erlangen: Siemens Healthineers, 2016).

2. Axente M, Paidi A, Von Eyben R, Zeng C, Bani-Hashemi A, Krauss A, Hristov D. Clinical evaluation of the iterative metal artifact reduction algorithm for CT simulation in radiotherapy. Med Phys. 2015 Mar;42(3):1170-83. doi: 10.1118/1.4906245. PMID: 25735272.

1202

Digital Poster

Comparison of performance of spectral x-ray CT and proton CT for relative stopping power estimation

Elena Fogazzi 1,2 , Guyue Hu 3 , Katharina Niepel 3 , Guillaume Landry 4,5,6 , Monica Scaringella 7 , Mara Bruzzi 7,8 , Florian Schwarz 9 , Franka Risch 9 , Thomas Kröncke 9 , Bastian Sabel 10 , Jens Ricke 10 , Paolo Farace 2,11 , Francesco Tommasino 1,2 , Carlo Civinini 7 , Katia Parodi 3,5 1 University of Trento, Physics Department, Povo (TN), Italy. 2 Italian National Institute of Nuclear Physics (INFN), Trento Institute for Fundamental Physics and Applications (TIFPA), Povo (TN), Italy. 3 LMU Munich, Department of Medical Physics, Garching b. München, Germany. 4 LMU University Hospital, Department of Radiation Oncology, Munich, Germany. 5 German Cancer Consortium (DKTK), Partner Site Munich, Munich, Germany. 6 Bavarian Cancer Research Center (BZKF), -, Munich, Germany. 7 Italian National Institute of Nuclear Physics (INFN), Florence Section, Sesto Fiorentino (FI), Italy. 8 University of Florence, Physics and Astronomy Department, Sesto Fiorentino (FI), Italy. 9 University Hospital Augsburg, Department of Diagnostic and Interventional Radiology, Augsburg, Germany. 10 LMU University Hospital, Department of Radiology, Munich, Germany. 11 Hospital of Trento, Medical Physics Unit, Trento, Italy

Purpose/Objective:

Uncertainties in the proton range, produced by inaccuracies of x-ray computed tomography (xCT) calibration, can have a profound effect on proton treatments. In the landscape of upcoming innovations and technological improvements, dual-energy CT (DECT) and photon-counting CT (PCCT) scanners, as well as proton imaging are