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. 2023 Dec;16(4):560-568.
doi: 10.1007/s12194-023-00742-1. Epub 2023 Sep 21.

Effect of shape of automatic dose rate control and wedge compensation filter on radiation dose in an angiography system with a flat-panel detector

Kazuya Kakuta  1   2 , Shumpei Nemoto  3 , Masamitsu Ikeda  3
Affiliations

Effect of shape of automatic dose rate control and wedge compensation filter on radiation dose in an angiography system with a flat-panel detector

Kazuya Kakuta et al. Radiol Phys Technol. 2023 Dec.

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 25 cm) were used. A wedge compensation filter was inserted 2 cm at a time, up to 6 cm. When the wedge compensation filter was inserted to 6 cm for 20 cm 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 4 cm under round-type for 20 cm poly-methyl-methacrylate. The shape of the ADRC affects [Formula: see text]a,e and PKA.

Keywords: Air-kerma area product; Angiography; Auto-dose rate control; Spectral shaping filter; Wedge compensation filter.

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