Active heating of large gel dosimeters

9th International Conference on 3D Radiation Dosimetry

Jordan, K.J.^1 ; Dekker, K.H.^1

London Regional Cancer Program, London Health Sciences Centre, Department of Medical Biophysics, Western University, London

ON, Canada^1

关键词: 3d dosimeters;    Accurate measurement;    Active heating;    Near Infrared;    Passive heating;    Temperature uniformity;    Thermal history;    Uniform heating;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/847/1/012050/pdf
DOI  :  10.1088/1742-6596/847/1/012050

来源: IOP

【 摘 要 】

Temperature uniformity of 3D dosimeters is key factor for accurate measurements. For gel dosimeters larger than 1 litre the time to change from storage to room temperature can be several hours. Local thermal histories within certain dosimeter materials can also cause measurable differences in ionizing radiation response. Passive heating by immersion in a water bath may not be optimum. Active uniform heating of 15 cm diameter, hydrogel, dosimeters using a near-infrared, incandescent light source reduced the time required to heat a hydrogel from 4 to 20°C uniformly from greater than five hours to less than 3 hours.