4results about "Electrostatic dosimeters" patented technology

The present disclosure discloses a method for measuring and checking the irradiation of a product by a radiation source using a measuring device. After conveying the product in front of the radiation source, the radiation beam irradiates the front of the product and passes through to hit the at least two detectors, which are pointing to the same target zone of the radiation source by a collimator. Finally, the recorded signal of each detector is compared with the signals determined in the performance qualification.

An infusion system may include a strontium-rubidium radioisotope generator that generates a radioactive eluate via elution, a beta detector, a gamma detector, and a controller. The beta detector and the gamma detector may be positioned to measure beta emissions and gamma emissions, respectively, emitted from the radioactive eluate. In some examples, the controller is configured to determine an activity of rubidium in the radioactive eluate based on the beta emissions measured by the beta detector and determine an activity of strontium in the radioactive eluate based on the gamma emissions measured by the gamma detector.

This invention discloses an X-ray radiation field calibration method, belonging to the field of X-ray calibration technology, including the following steps: S1. Setting up a calibration system; S2. Measuring the dose rate distribution and uniformity of the radiation field using a beam analysis system; S3. Measuring the output stability of the radiation beam using an ionization chamber dosimeter; S4. Turning off the radiation source; S5. Measuring the deviation of the radiation beam from the orbital center axis using an ionization chamber scanning method or imaging method; S6. Recording environmental parameters, measurement data, and calculation results during the calibration process; S7. Based on the measurement data and uncertainty evaluation method. This invention eliminates systematic errors introduced by environmental factors at the source by strictly controlling the temperature, humidity, vibration, and electromagnetic interference of the calibration environment. It utilizes a beam analysis system, an ionization chamber dosimeter, and a radiation protection dose equivalent rate meter working in tandem to achieve comprehensive detection of the radiation field dose rate distribution, uniformity, output stability, radiation beam deviation, and surrounding dose equivalent.

An ionization detector provides accurate measurements of high dose rate, short duration radiation pulses required by FLASH radiation therapy procedures by employing high voltages across narrow ionization channels minimizing saturation and polarization effects. Air equivalent polymers may be used to provide the electrodes of the ionization detector for improved accuracy and to resist radiation-induced degradation.