Too few x-ray photons (not enough mAs) = quantum noise What is quantum mottle? Grainy appearance on an image caused by underexposure What does quantum mottle look like? Black and white speckles How is quantum mottle caused? not enough x-ray photons How do you get rid of quantum mottle? Increase technique (kVp & mAs)

Positioning is based on body part being imaged, condition of patient, and suspected disease. Body positioning is important because many of the internal structures superimpose over each other, therefore, certain positions are required to get a clear view of the area of concern. Ex. Chest X-ray: The heart lies more anterior and a little to… Read more