Final answer:
In radiographic imaging, inherent filtration, added filtration, and SID affect patient dose. Focal spot size does not directly influence patient dose, but affects image resolution. Filtration is used to absorb low-energy photons, and SID is related to the inverse square law of radiation.
Step-by-step explanation:
The question pertains to the factors that influence patient dose during radiographic imaging. Inherent filtration, added filtration, and SID (Source-to-Image Distance) all directly affect the amount of radiation the patient receives. Filtration (both inherent and added) is used to absorb low-energy X-ray photons that are unlikely to contribute to the image but would increase patient dose. SID influences patient dose in that increasing the distance reduces the dose due to the inverse square law of radiation. On the other hand, the focal spot size does not have a direct effect on patient dose; it primarily affects the resolution and sharpness of the image produced. In medical imaging, larger focal spots can handle more heat but do not increase or decrease the radiation dose received by the patient.