ESTRO 2024 - Abstract Book

S3837

Physics - Image acquisition and processing

ESTRO 2024

Conclusion:

The use of DirectDensity® eases the adoption of variable-voltage scans in radiotherapy. About 50% of breast scans can be performed at 80–90 kV with good image quality, significantly reducing dose levels. However, immobilization devices can mislead the algorithm, increasing unnecessarily the tube voltage due to the presence of high attenuation elements. Radiation therapists have to be careful when choosing the scan range on the topogram to improve the automatic choice of tube voltage.

Keywords: Dose indices, simulation CT, treatment planning

References:

[1] A. Ritter and N. Mistry, Direct Density: Technical principles and implications for radiotherapy - White paper. Siemens Healthcare (2020)

[2] J. T. Wood et al., IPEM topical report: the first UK survey of dose indices from radiotherapy treatment planning computed tomography scans for adult patients. Phys. Med. Biol. 63: 185008 (2018)

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Digital Poster

Flashing Automatic Contour Tracing (FACT) - A novel electron cutout digitization method

James J Sohn 1 , Jeonghoon Park 2 , Siddhant Sen 3 , Matt Mielke 4 , Siyong Kim 5

1 University of Chicago, Radiation and Cellular Oncology, Chicago, USA. 2 Memorial Sloan Kettering Cancer Center, Radiation Oncology, Basking Ridge, USA. 3 University of Illinois at Urbana Champaign, Psychology, Champaign, USA.