Final answer:
Larger film format leads to improved image quality but requires a higher radiation dose to the patient. Modern safety measures and techniques are used to minimize the risk, while maximizing the diagnostic benefits of clearer images.
Step-by-step explanation:
Larger film format results in better image quality but at increased patient dose. The increased surface area of larger film requires more radiation exposure to achieve the necessary level of image detail. This increase in radiation can, therefore, lead to a higher dose being absorbed by the patient. However, the benefit of improved image quality can be significant, particularly in medical diagnosis where detail is crucial. Modern techniques and shielding, such as using lead aprons and reducing the technician's exposure by standing behind a lead-lined door, help to reduce the risks associated with this exposure.
It is important to balance the risk versus benefit when considering the use of larger film formats in medical imaging. While diagnostic doses are typically low, thanks to improved techniques and faster films, radiation is only used when necessary to ensure that the benefits of a clearer, more detailed image outweigh the risks associated with increased exposure. These considerations are essential in all forms of medical imaging, from chest x-rays to more complex scans like CTs and those requiring radiopharmaceuticals.