Final answer:
To prevent beam-hardening artifact when scanning a patient's chest, use shielding such as lead aprons, employ fast films to reduce exposure time, and increase distance from the x-ray source.
Step-by-step explanation:
When scanning a patient's chest to prevent beam-hardening artifact, which can affect the quality of an image, there are several methods a technician can use. The use of shielding, such as lead aprons, can limit exposure to tissues not being imaged. Additionally, utilizing fast films can reduce the time required to obtain adequate images, thereby reducing the overall exposure to the imaged tissue. This, in conjunction with increased distance from the x-ray source and shielding around the x-ray tube, can help to minimize the artifacts caused by radiation scattering and absorption.