What procedure produces images of an organ or area of the body after introduction of a tracer?
A) Radiography
B) Ultrasonography
C) US
D) X-ray
E) Nuclear scan

Question

Quizplus · Accepted Answer

Nuclear scans involve the introduction of a radioactive tracer into the body, which then emits gamma rays that can be detected by an external camera to produce images of the organ or area being examined. Radiography and X-ray use ionizing radiation to produce images, while ultrasonography uses high-frequency sound waves to create images without the use of radiation. US is an abbreviation that could refer to either ultrasonography or the United States, and so is not a clear answer choice in this context.

What Procedure Produces Images of an Organ or Area of the Body