Navigated marker placement for motion compensation in radiotherapy

Winterstein, Almut G.; März, Keno; Franz, Alfred M.; Hafezi, Mohammadreza; Fard, Nassim; Sterzing, Florian; Mehrabi, Arianeb; Maier-Hein, Lena

doi:10.1117/12.2081808

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E Clinical Implementation and Workflow1

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2016

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“…Transponder placement was performed using CT guidance, but it may be advantageous to explore the use of computer-assisted needle insertion in the future for more accurate placement of the transponders. 18 CT simulation was delayed at least four days after implantation to account for migration. 19 Each patient had two scans: a 4DCT scan with contrast and an end-of-expiration breath-hold scan.…”

Section: E Clinical Implementation and Workflowmentioning

confidence: 99%

Technical Note: Validation and implementation of a wireless transponder tracking system for gated stereotactic ablative radiotherapy of the liver

et al. 2016

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Wireless transponder tracking was validated as a dosimetrically accurate way to provide gated SABR of the liver. The dynamic tracking accuracy of the Calypso system met manufacturer's specification, even for continuous large amplitude motion that can be encountered when tracking liver tumors close to the diaphragm. The measured beam-hold gating latency was appropriate for targets that will traverse the gating limit each respiratory cycle causing the beam to be interrupted constantly throughout treatment delivery.

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Section: E Clinical Implementation and Workflowmentioning

confidence: 99%