Abstract
The purpose was to investigate air-kerma area product (PKA) and entrance surface air-kerma rate ([Formula: see text]a,e) on the effect of the shape of automatic dose rate control (ADRC) in the presence of a wedge compensation filter. We compared and evaluated the variability of the X-ray output using a combination of wedge compensation filters and the ADRC. Two ADRC shapes (round and square) and three poly-methyl-methacrylate thicknesses (15, 20, and 25cm) were used. A wedge compensation filter was inserted 2cm at a time, up to 6cm. When the wedge compensation filter was inserted to 6 cm for 20cm of poly-methyl-methacrylate, the X-ray output fluctuated significantly. The PKA was reduced by 39% when the wedge compensation filter was inserted to 6 cm and by 59% when it was inserted to 4cm under round-type for 20cm poly-methyl-methacrylate. The shape of the ADRC affects [Formula: see text]a,e and PKA.
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