CAMRT Radiography Practice Exam

Which instruments are used for sensitometry?

1. Stethoscope and sphygmomanometer

2. Sensitometer and Densitometer

3. X-ray machine and MRI scanner

4. Ultrasound and CT scanner

The correct answer is: Sensitometer and Densitometer

Sensitometry is the study of the sensitivity of photographic film and imaging systems, particularly in radiography. The primary instruments used for this purpose include a sensitometer and a densitometer. A sensitometer is an instrument that exposes film or other photosensitive materials to a controlled light source in a specific manner, allowing for the assessment of how the film responds to different levels of exposure. This is crucial in determining the film's speed and the relationship between exposure and subsequent density. On the other hand, a densitometer measures the optical density of the exposed film, providing data on the degree of blackening or transparency of the film after it has been processed. By using these two instruments together, radiographers can analyze and optimize imaging techniques, ensuring that the quality of X-ray films meets the required standards and that they are sensitive enough for effective diagnostic imaging. The other options consist of instruments that serve different clinical and diagnostic purposes, thus they do not pertain to the specific field of sensitometry.