In this study, we seek to present a three dimensional beam pattern and distribution of strength for the anode heel effect, by using 3D modeling on beams emitted from the X-ray tube.A digital flat panel detector was used to acquire pre-processed images for each voltage (kVp), current (mA), and field of view (FOV) of the tube. An image analysis program was used to analyze the distribution of the strength of X-rays and 3D modeling was carried out to evaluate in three dimensions the anode heel effect. The beam pattern and strength appeared until the threshold of the pixel value and then showed saturation with an increase in the voltage of the tube. When the current was increased for the same exposure dose, there was no change in the beam pattern or distribution of strength. As the field of view increased, the beam pattern and distribution of strength became more distinct. On the horizontal axis that connects the anode and cathode in the distribution of the X-ray’s strength, the strength of the anode was lower than that of the cathode. On the vertical axis, too, the strength was lower as the distance from the center of the beam increased. With analysis of the pixel value that correspond to the exposure dose and 3D modeling, we verified in three dimension the horizontal axis that connects the anode and cathode and the corresponding field of view on the vertical axis to newly define the anode heel effect.
Volume 11 | 07-Special Issue
Pages: 1820-1825