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Appl Radiat Isot. 2015 Nov;105:88-91. doi: 10.1016/j.apradiso.2015.07.020. Epub 2015 Jul 30.

Continuous versus step-by-step scanning mode of a novel 3D scanner for CyberKnife measurements.

Author information

1
Biomedical Physics Department, King Faisal Specialist Hospital & Research Centre, MBC 03, P.O. Box 3354, Riyadh 11211, Saudi Arabia. Electronic address: mal-kafi@kfshrc.edu.sa.
2
Biomedical Physics Department, King Faisal Specialist Hospital & Research Centre, MBC 03, P.O. Box 3354, Riyadh 11211, Saudi Arabia.

Abstract

The purpose of the study is to investigate the continuous versus step-by-step scanning mode of a commercial circular 3D scanner for commissioning measurements of a robotic stereotactic radiosurgery system. The 3D scanner was used for profile measurements in step-by-step and continuous modes with the intent of comparing the two scanning modes for consistency. The profile measurements of in-plane, cross-plane, 15 degree, and 105 degree were performed for both fixed cones and Iris collimators at depth of maximum dose and at 10cm depth. For CyberKnife field size, penumbra, flatness and symmetry analysis, it was observed that the measurements with continuous mode, which can be up to 6 times faster than step-by-step mode, are comparable and produce scans nearly identical to step-by-step mode. When compared with centered step-by-step mode data, a fully processed continuous mode data gives rise to maximum of 0.50% and 0.60% symmetry and flatness difference respectfully for all the fixed cones and Iris collimators studied.

KEYWORDS:

3D Scanner; Commissioning; CyberKnife

PMID:
26265091
DOI:
10.1016/j.apradiso.2015.07.020
[Indexed for MEDLINE]

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