Quantum model in radiology is what happens to an image when not enough X-ray photons make it to the imaging receptor. It creates a grainy image and is primarily the fault of not having a high enough mAs. When increasing mAs to help fix the quantum model, the radiologist must increase their exposure factors. This increase in mAs should be at least 30% in order to see a noticeable difference and is most commonly increased by a factor of two. This increase in mAs will help to patch the holes that are on the image receptor. An easy way to tell if an image has quantum model is to check the different gray areas to see if there are specks or dots. This would indicate that more mAs would be needed in order to penetrate the patient’s body.
X-ray X-pert 