Computed Tomography (CT) Exam
Questions and Answers (Latest Update
2025)
What is CT and what is it used for? - Correct Answer ✅CT
uses diagnostic x-rays to create cross-sectional images of the
human body. It uses mathematical algorithms to combine
these images together. It's helpful in obtaining of volume of
information so we can see structures in 3 dimensions. It's
extremely helpful with cancers to be able to detect the size
and shape of a mass.
What are the components of the equipment? - Correct
Answer ✅Gantry: Gantry includes the couch (table) and
support, scanner housing, x ray tube, and detectors.
Computer: displays images
Operating console: CT can have up to three operating
consoles.
How does the equipment work? - Correct Answer ✅The x-
ray tube is pulsed and has a fan shaped/ narrow beam. It has
a rotating tube that is opposite of the detector. The tube has
a small focal spot. The detector sends data to the computer
and measures the attenuation coefficient. The computer
receives, process, displays and stores data. It also displays
the technique, and allows for post processing.
What are housefield units? - Correct Answer ✅tissue
density values and measure the thickness of tissue that can
be used for contrast, and detection of diseases.
Questions and Answers (Latest Update
2025)
What is CT and what is it used for? - Correct Answer ✅CT
uses diagnostic x-rays to create cross-sectional images of the
human body. It uses mathematical algorithms to combine
these images together. It's helpful in obtaining of volume of
information so we can see structures in 3 dimensions. It's
extremely helpful with cancers to be able to detect the size
and shape of a mass.
What are the components of the equipment? - Correct
Answer ✅Gantry: Gantry includes the couch (table) and
support, scanner housing, x ray tube, and detectors.
Computer: displays images
Operating console: CT can have up to three operating
consoles.
How does the equipment work? - Correct Answer ✅The x-
ray tube is pulsed and has a fan shaped/ narrow beam. It has
a rotating tube that is opposite of the detector. The tube has
a small focal spot. The detector sends data to the computer
and measures the attenuation coefficient. The computer
receives, process, displays and stores data. It also displays
the technique, and allows for post processing.
What are housefield units? - Correct Answer ✅tissue
density values and measure the thickness of tissue that can
be used for contrast, and detection of diseases.
