General purpose, wide energy range calibration source for medical emission tomography
AssigneeSiemens Medical Solutions USA, Inc.
InventorsAlexander Hans Vija, Miesher Rodrigues
Life of this patent
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Abstract
For calibration in medical emission tomography, the dosimeter and/or detector is calibrated in the field, such as at the clinic or other patient scanning location. To allow for a fewer number of calibration sources used in calibrating and/or assist in calibration for multispectral emission tomography, a calibration source includes multiple isotopes and/or a proxy source or isotope is used instead of the same isotope used in factory calibration.
Claims20
A calibration source for medical emission tomography, the calibration source comprising:
- an epoxy pellet forming an active element with at least two different radioisotopes;
- and
- a housing enclosing the epoxy pellet.
A calibration source for medical emission tomography, the calibration source comprising:
- a first pellet forming a first active element of a first radioisotope;
- a second pellet forming a second active element of a second radioisotope different than the first radioisotope;
- and
- a housing enclosing the first and second pellets.
A method for calibration of medical emission tomography, the method comprising:
- providing an emission tomography detector having been factory calibrated with a first calibrated source of a first radioisotope;
- and
- field calibrating the emission tomography detector with a second calibrated source of a second radioisotope, the second radioisotope different than the first radioisotope, the second calibrated source being a proxy for the first calibrated source.
Dependencies are inferred from the claim text.