Reduction of radiation exposure in full spine images in youth

Abstract

With a phantom of the vertebral column in 16 measuring series using diagnostic dosimeters the influence of grid, recording voltage, focus-film distance (FFD) and film-foil-systems on the radiation exposure was examined. With identical film-foil systems this resulted in a dose reduction by a factor of 4 to 7 for X-rays without grid compared to X-rays using grid. Therefore in case of follow-ups with questions about the statics of the vertebral column it is recommended to X-rays without grid. The studies can substantiate also the recommendations aiming at the avoidance of long exposure times to apply small mAs-products and voltages as high possible, to use highly sensitive film-screen systems (e.g. EU 600) and not to exceed a FFD of 2 m). These actions even when used separately and certainly when used simultaneously cause a considerable cut in radiation exposure. A radiation exposure decreasing effect is given by taking total X-rays compared to partial X-rays which is appropriate especially with slim patients.