MD, Dr. Sci. (Med.), Associate Professor
д-р мед. наук, доцент
MD, Dr. Sci. (Med.), Associate Professor
MD
MD
Background. The regulated procedure for quality control of radiography involves the analysis of test objects without simulating anatomical features. However, for subsequent assessment of the quality of work of radiologists or decision support systems using artificial intelligence, it is necessary to use anthropomorphic test objects (phantoms), the X-ray image of which will be as close as possible to the analyzed images of patients.
Aim. Development and testing of an anthropomorphic aluminum phantom for digital radiography
Materials and methods. A digital radiograph of the chest of a healthy person was used as a standard when designing the phantom. A sample of the designed phantom was made by layer-by-layer milling of an aluminum blank. Validation was carried out by comparing the phantom images and the reference image. In addition, an assessment was made of the effect of the phantom sample on the spatial resolution and contrast sensitivity for various shooting modes of X-ray machine. The applicability of the phantom for modeling focal lung lesions was studied, with an assessment of the results by experts.
Results. It was found that the phantom reproduces the reference image with a high degree of reliability and allows simulating pathological changes in chest X-rays by placing plastic pads in the required position. The ratios of attenuation coefficients for different anatomical areas during X-ray imaging of the phantom and three patients were identified.
Conclusion. The study presents a method for developing an anthropomorphic phantom made of D16T aluminum alloy, designed for calibrating X-ray systems and testing radiology specialists. The phantom imitates the anatomical structures of the chest organs and pathological changes, such as focal lesions. The main advantages of the solution include reduced production costs, compactness and high accuracy of reproduction of X-ray characteristics.