Final answer:
When magnification mode increases from 6-inch to 9-inch, the patient's radiation dose is increased by 1.5 times due to the need for more radiation to maintain image quality at larger magnification.
Step-by-step explanation:
When switching from a 6-inch magnification mode to a 9-inch mode, the patient's radiation dose is increased by 1.5 times. This change in radiation dose is related to the magnification settings of the imaging device. As the magnification is increased, the radiation dose typically goes up due to the need for a higher amount of radiation to maintain image quality at the larger magnification. The increase in magnification leads to a reduction in the field of view and requires more radiation to achieve the same level of image detail and clarity.
In radiographic procedures, magnification and radiation dose are inversely related to the area of the body part being imaged. Decreased field size under higher magnification results in less scatter radiation, but the radiation intensity must be increased to compensate, which results in an increased dose to the patient. As healthcare professionals, it is crucial to balance the need for diagnostic quality images against the importance of minimizing radiation exposure.