Optimal gantry angles and field sizes in kilovoltage cone-beam tomosynthesis for set-up of women with breast cancer undergoing radiotherapy treatment

Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology
Yulia LyatskayaPiotr Zygmanski

Abstract

Optimal beam geometry for kilovoltage cone-beam tomosynthesis (CB-TS) imaging for the set-up of 20 patients with breast cancer was analyzed and presented for prone and supine scenarios. Gantry angles and field sizes that allow maximum clearance and minimum dose to normal organs from kilovoltage imaging were determined for medial and lateral arcs. Optimal CB-TS arc span may vary depending on patient geometry, particularly on the separation between the cavity and the chest wall. CB-TS arc angles 40 degrees were found to be optimal for the cavity to chest wall separation d>3 cm for supine set-up and d>7 cm for prone set-up. Maximum required jaw openings were 20 x 14 cm(2). Recommendations are provided for clinical implementation of CB-TS imaging for breast cancer patients.

References

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Nov 18, 2008·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Pooja JainPat Price

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Citations

Dec 31, 2011·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Sook Kien NgPiotr Zygmanski
Nov 22, 2011·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Nanna M SijtsemaAart A van 't Veld
May 16, 2012·Journal of Applied Clinical Medical Physics·Sook Kien NgYulia Lyatskaya
Feb 14, 2015·Journal of Applied Clinical Medical Physics·Saskia PetillionFrank Van den Heuvel

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