Relative calibration for dosimetric devices
AssigneeRadiological Imaging Technology, Inc.
InventorsDaniel M. Ritt, Matthew L. Whitaker, Arthur J. Olch
Life of this patent
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Abstract
Calibrating the dose response of an image acquisition device comprises comparing a first self-calibration curve to a second self-calibration curve to determine the relationship between the curves; modifying an acquired image based on the at least one difference; and applying an initial calibration to the acquired image, whereby the dose response of the image acquisition device is calibrated.
Claims21
A method comprising:
- creating a first self-calibration curve that relates dosages of a first dose map associated with a first radiation treatment plan to dosage intensities on a first acquired image recorded from an application of the first radiation treatment plan;
- creating at least one subsequent self calibration curve that relates dosages of at least one subsequent dose map associated with at least one subsequent radiation treatment plan to dosage intensities on at least one subsequent acquired image recorded from application of the at least one subsequent radiation treatment plan;
- and
- transforming, in the computer, the at least one subsequent acquired image, based on a comparison of the first self-calibration curve to the at least one subsequent self-calibration curve, to generate a modified acquired image that is stored on a computer-readable medium.
A computer-readable medium tangibly embodying computer-readable instructions configured to instruct one or more processors to perform steps comprising:
- creating a first self-calibration curve that relates dosages of a first dose map associated with a first radiation treatment plan to dosage intensities on a first acquired image recorded from an application of the first radiation treatment plan;
- creating at least one subsequent self-calibration curve that relates dosages of at least one subsequent dose map associated with at least one subsequent radiation treatment plan to dosage intensities on at least one subsequent acquired image recorded from application of the at least one subsequent radiation treatment plan;
- and
- modifying the at least one subsequent acquired image based on a comparison of the first self-calibration curve to the at least one subsequent self-calibration curve.
A system comprising:
- means for creating a first self-calibration curve that relates dosages of a first dose map associated with a first radiation treatment plan to dosage intensities on a first acquired image recorded from an application of the first radiation treatment plan;
- means for creating at least one subsequent self-calibration curve that relates dosages of at least one subsequent dose map associated with at least one subsequent radiation treatment plan to dosage intensities on at least one subsequent acquired image recorded from application of the at least one subsequent radiation treatment plan;
- and
- means for modifying the at least one subsequent acquired image based on a comparison of the first self-calibration curve to the at least one subsequent self-calibration curve.
Dependencies are inferred from the claim text.