CAMRT Radiography Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the CAMRT Radiography Exam. Prepare with our comprehensive quiz that features multiple choice questions along with hints and explanations designed to enhance your understanding. Get ready to excel in your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the CT number for bone?

20
0
1000
-200

The correct answer is: 1000

The CT number for bone is defined by its high density, which results in a significantly high value on the Hounsfield scale, which is utilized in computed tomography (CT) imaging. Bone is considerably denser than soft tissue and water, resulting in a CT number around +1000. This density is due to the mineral content in bone, primarily calcium, which absorbs more X-ray radiation compared to less dense substances. In contrast, water is assigned a CT number of 0 on this scale, and fat typically has negative values, while air has significantly low values. Understanding the CT numbers assigned to various substances is crucial in interpreting CT images effectively, as they provide information on the composition and density of the tissues being scanned. This knowledge is vital for radiographers when making assessments based on CT images.