CAMRT Radiography Practice Exam

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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!

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Which of the following represents the CT value for fat?

1000
-100
-1000
-100

The correct answer is: 1000

The CT value for fat is represented by a value of approximately -100 Hounsfield units. This numerical representation is based on the composition of the tissue being imaged and its density relative to water, which has a CT value of 0. When a CT scan is performed, different types of tissues and substances in the body have characteristic radiodensities that are measured in Hounsfield units. Fat, being less dense than water, assigns it a negative value, indicating that it attenuates X-rays less than water. The typical CT value for fat falls around -100 Hounsfield units, making it an important reference for differentiating between various soft tissues on CT images. The other values listed do not accurately reflect the CT value for fat. The value of 1000 Hounsfield units would be characteristic of dense bone, while -1000 is often associated with air or gas within the body, which is much less dense than fat. Therefore, the only accurate representation of the CT value for fat is -100 Hounsfield units.