What question did this study set out to answer?

To evaluate the feasibility of producing wedge-shaped radiation dose distributions by dynamically moving linear accelerator collimator jaws under computer control.

September 1, 1978Medical Physics

Wedge‐shaped dose distributions by computer‐controlled collimator motion

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Authors

PKPeter K. KijewskiMemorial Sloan Kettering Cancer Center LCLee M. ChinBrigham and Women's Hospital BBBengt E. BjärngardHarvard University

Discussion

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Implication

Feasibility study demonstrates accurate wedge-shaped dose delivery via computer-controlled collimator motion in phantoms, suggesting customizable beam profiles without physical filters.

Key Points

To evaluate the feasibility of producing wedge-shaped radiation dose distributions by dynamically moving linear accelerator collimator jaws under computer control.
Modified a linear accelerator to enable dynamic computer control of collimator jaws during beam delivery.
Calculated required collimator trajectories using an iterative mathematical technique.
Irradiated phantoms containing radiographic film to assess agreement between calculated and measured dose distributions.
Demonstrated good correspondence between calculated dose profiles and measured distributions on radiographic film.
Confirmed the technical feasibility of dynamic jaw motion, allowing continuous wedge angle adjustment and depth-specific isodose optimization.

Cite This Study

Kijewski et al. (1978) studied this question.

synapsesocial.com/papers/6aa3cb3d04de40c43bb14db0 https://doi.org/10.1118/1.594440

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Implication

Feasibility study demonstrates accurate wedge-shaped dose delivery via computer-controlled collimator motion in phantoms, suggesting customizable beam profiles without physical filters.

Wedge‐shaped dose distributions by computer‐controlled collimator motion

Discussion

Member takes

Implication

Key Points

Cite This Study

Wedge‐shaped dose distributions by computer‐controlled collimator motion

Discussion

Member takes

Implication

Key Points

Cite This Study

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