USAHS imaging CLO 1 question n answers 2023/2024

USAHS imaging CLO 1radiology study of x-rays radiograph Image produced on photosensitive film by exposing the film to radiation and then processing it term now preferred by the American College of Radiology conventional radiography How are x-rays produced? • X-rays pass through the body to the film • Radiation that reaches the film darkens the film radiograph is a shadow-gram that displays radiodensities When something is ______________ it appears to be black because the X-rays are able to pass through with little resistance. Radiolucent Ex. Air, fluid When something is ___________ it appears to be white/light grey because the X-rays are blocked and X-rays are absorbed. Radiodense When something is _____________ it appears white because no X-rays can pass through. Examples include metals/ injected dyes. Radio-opaque Radiodensity a fixed characteristic of a particular tissue? T/F False, radiodensity simply refers to what you SEE in the image Radiodensity The ability of an object to stop or slow radiation. • Density • Thickness • Placement of one thing over another What affects radiodensity • Strength of the x-rays (milliamperes), • Length of the exposure, • Distance to the film from the x-ray tube (law of inverse squares) What is more radio-dense cortical bone or cancellous bone? Cortical Short exposure time and low milliamperes ________ the radiodensity INCREASE What is more radio-dense bone or muscle? Bone What is more radio-dense muscle or fat? Muscle What is more radio-dense water or fat? Water