Radiant energy – Calibration or standardization methods
Patent
1981-05-08
1982-06-01
Willis, Davis L.
Radiant energy
Calibration or standardization methods
250505, G01D 1800
Patent
active
043330100
ABSTRACT:
A method and apparatus is disclosed for evaluating the linearity of response of a radioactivity dose measurement device over a range of radioactivity dose levels. In accordance with the method, a reference dose of radiopharmaceutical in a container is placed in a central, substantially non-absorptive tube mounted atop a cylindrical spacer with a lead slug coaxial in the tube and positioned below the spacer. This assembly is placed in a measurement chamber of the measurement device, and the response of the device to the unshielded radioactivity is recorded. A succession of leaded shielding sleeves, each having a different known radioactivity attenuation capability, is placed, one at a time, over the central tube. A measurement reading of the device is recorded for indicating the response of the measurement device to the reference dose as shielded by each different sleeve. Multiplication of each response reading by a correction factor, which is a function of the attenuation capability of the sleeve used in obtaining the reading, yields data from which linearity of measurement device response can be easily calculated.
REFERENCES:
patent: 3524063 (1970-08-01), Mangan
patent: 3598109 (1971-08-01), Yokohamashi
patent: 3657541 (1972-04-01), Deutsch et al.
patent: 3690309 (1972-09-01), Planknokoy et al.
patent: 3883738 (1975-05-01), Glover et al.
patent: 3935449 (1976-01-01), Reunanen
patent: 3950643 (1976-04-01), Charlton
patent: 4158135 (1979-06-01), Thorell
patent: 4198986 (1980-04-01), Suzuki
LandOfFree
Dose calibrator linearity evaluation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dose calibrator linearity evaluation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dose calibrator linearity evaluation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1851210