Rotation effects on the target-volume margin determination

Qinghui Zhang; Weijun Xiong; Maria F Chan; Yulin Song; Chandra Burman

doi:10.1016/j.ejmp.2014.10.076

Rotation effects on the target-volume margin determination

Phys Med. 2015 Feb;31(1):80-4. doi: 10.1016/j.ejmp.2014.10.076. Epub 2014 Oct 29.

Authors

Qinghui Zhang¹, Weijun Xiong², Maria F Chan², Yulin Song², Chandra Burman²

Affiliations

¹ Department of Radiation Oncology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA. Electronic address: qinghui.zhang@gmail.com.
² Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.

PMID: 25455438
DOI: 10.1016/j.ejmp.2014.10.076

Abstract

Rotational setup errors are usually neglected in most clinical centers. An analytical formula is developed to determine the extra margin between clinical target volume (CTV) and planning target volume (PTV) to account for setup errors. The proposed formula corrects for both translational and rotational setup errors and then incorporated into margin determination for PTV.

Keywords: Margin; Radiotherapy; Rotation; Setup errors; Target volume.

MeSH terms

Cone-Beam Computed Tomography
Humans
Neoplasms / diagnostic imaging
Neoplasms / pathology
Radiotherapy Planning, Computer-Assisted / methods*
Radiotherapy Setup Errors*
Rotation*
Tumor Burden

Grants and funding

P30 CA008748/CA/NCI NIH HHS/United States