Final answer:
All of the statements regarding SNR are true, except for excessive SNR being associated with underexposure.
Step-by-step explanation:
All of the following statements regarding SNR are true, except:
- SNR is directly related to image quality
- SNR is directly related to patient dose
- Insufficient SNR results in quantum noise
- Excessive SNR is associated with underexposure
SNR stands for Signal-to-Noise Ratio, which is a measure of the quality of an image or signal. A higher SNR indicates a better image quality by reducing noise and improving visibility of details. It is not directly related to patient dose, as dose is controlled by other factors such as technique and equipment settings. Insufficient SNR can result in quantum noise, which is the random variation in pixel values due to insufficient signal. However, excessive SNR is not associated with underexposure, as it refers to a stronger signal and reduced noise.