Application of an imaging plate for evaluating the uncertainty in direct organ measurements due to variation in detector location

In this study, the proposed method was tested in an experiment using a realistic torso phantom containing an 241Am liver source. The latent image of this source was obtained by irradiating the IP (20 x 40 cm2) from the anterior surface of the phantom. A comparison of responses between the IP and a high-purity germanium detector was made for 6 of the 144 circular ROIs arranged on the latent image, showing excellent correlation between the two sets of measures. The dispersion of the photostimulated luminescence values of the 144 ROIs was found to be 8.2% (1) and 1.09 as a log-normal scattering factor, which was expected to be the same as the uncertainty of concern in the present measurement with the HPGe detector.
Source: Radiation Protection Dosimetry - Category: Radiology Authors: Tags: Paper Source Type: research