CT Patient Table and Image Display Process

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Questions and Answers

What is the purpose of windowing in CT imaging?

To adjust the brightness and contrast of the CT image to optimize viewing by the human eye (correct)
To reduce the file size of the CT image for easier storage and transfer
To increase the number of shades of gray presented on the CT image
To enhance the edges and boundaries of structures in the CT image

What is the relationship between window width (WW) and the CT image contrast?

WW is independent of the CT image contrast
WW controls the brightness of the CT image
WW is used to adjust the resolution of the CT image
WW determines the number of shades of gray presented in the CT image (correct)

What is the role of the window level (WL) in CT image display?

WL controls the brightness of the CT image by defining the center or midpoint of the CT number range (correct)
WL is independent of the CT image brightness
WL determines the number of shades of gray presented in the CT image
WL is used to adjust the resolution of the CT image

Where is the windowing process performed on a CT image?

At the viewing workstation where the CT image is displayed (A) Signup and view all the answers

What is the purpose of optimizing the WW and WL values during the initial CT image acquisition?

To ensure the CT image contrast and brightness are optimized for the anatomy under study (A) Signup and view all the answers

What is the main advantage of using windowing to adjust the CT image display?

It optimizes the image contrast and brightness for the human eye (B) Signup and view all the answers

What is the purpose of lowering the patient table to sitting height in a CT procedure?

To allow elderly patients to easily reposition on the table (C) Signup and view all the answers

What is important for optimizing image fidelity in grayscale display monitors?

Physical characteristics like luminance, resolution, noise, and dynamic range (B) Signup and view all the answers

What is a critical physical parameter related to grayscale display monitors?

Resolution (C) Signup and view all the answers

Why is windowing essential in CT image display?

To adjust the range of grayscale shades for better human perception (A) Signup and view all the answers

What is responsible for displaying grayscale CT images on monitors?

Television monitor (Cathode ray tube [CRT]) or liquid crystal display (D) Signup and view all the answers

Why is optimizing image fidelity important in grayscale display monitors?

To ensure faithful representation of CT images for accurate diagnosis (A) Signup and view all the answers

What is the primary function of the viewing console in a CT scanner?

To display the reconstructed image for viewing and diagnosis (C) Signup and view all the answers

Which of the following statements about the operating console of a CT scanner is true?

It modulates (varies) the mA during imaging based on patient thickness (C) Signup and view all the answers

What is the primary function of the patient table in a CT scanner?

To position the patient and move them through the scanner bore during scanning (A) Signup and view all the answers

Which component of a CT scanner is responsible for controlling the movement of the patient table?

The CT computer (A) Signup and view all the answers

What is the purpose of the laser lights in a CT scanner?

To assist in positioning the patient correctly within the scanner bore (D) Signup and view all the answers

Which of the following statements about the grayscale display monitors in a CT scanner is true?

They are used to display the reconstructed image for viewing and diagnosis (C) Signup and view all the answers

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