Fluoroscopy normal | Fluoroscopy ultra-low | |||
Grid | No grid | Grid | No grid | |
Dose rate (PA) (mGy/min) | 5.07 | 2.57 | 3.56 | 1.77 |
Dose rate (LAO45) (mGy/min) | 4.21 | 2.52 | 2.86 | 1.71 |
Dose rate (RAO30) (mGy/min) | 5.59 | 2.86 | 3.71 | 1.91 |
Measurements were performed with the fluoroscopy at the factory determined ‘low’ setting and at the customised ‘ultra-low’ setting, both with and without the grid in situ. The relative uncertainty of dose rate measurements was 2.8%.
PA, posteroanterior projection; LAO45, left anterior oblique 45° projection; RAO30, right anterior oblique 30° projection.