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A calibration monitor has been designed for measuring the constancy of linear accelerator or cobalt unit output between full calibrations. This monitor is battery operated, light-weight and slides into the shadow tray attachment on a linear accelerator or cobalt unit for easy setup. It provides a digital readout of the dose delivered, and a consistency check can be made in less than two minutes. The precision of the monitor, determined by cobalt-60 irradiations over a 2 1/2 period, is +/- 0.6% (standard deviation). The monitor also retains the dose reading in a CMOS digital counter indefinitely, hence it can be used in the same fashion as mailed thermoluminescent dosimeters (TLD) for calibration checks at remote facilities without the complicated readout procedures associated with TLD. The monitor can be mailed to a remote facility, positioned without ambiguity, and irradiated; and the reading can be verified on return to the originating center simply by pressing a switch. The monitor can easily be set up to carry out a "blind" check in which the reading obtained is not known to the remote facility.
R L Dixon, and
K E Ekstrand
January 1983,
Medical physics,
R L Dixon, and
K E Ekstrand
January 1982,
Medical physics,
R L Dixon, and
K E Ekstrand
January 1995,
Medical physics,
R L Dixon, and
K E Ekstrand
January 1975,
The American journal of roentgenology, radium therapy, and nuclear medicine,
R L Dixon, and
K E Ekstrand
February 1986,
International journal of radiation oncology, biology, physics,
R L Dixon, and
K E Ekstrand
March 1978,
Australasian radiology,
R L Dixon, and
K E Ekstrand
September 1983,
Strahlentherapie,
R L Dixon, and
K E Ekstrand
November 2008,
Medical physics,
R L Dixon, and
K E Ekstrand
October 1981,
Strahlentherapie,
R L Dixon, and
K E Ekstrand
March 1972,
Journal of the Mississippi State Medical Association,
