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. 2018 Nov 1;20(1):37–42. doi: 10.1002/acm2.12463

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© 2018 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Method for determining the threshold gate generation for beam on/off. The threshold level was derived from the tumor (clinical target volume;CTV) motion obtained from four‐dimensional computed tomography (4D‐CT) information.