Exam 8: Image Postprocessing and Visualization Tools

Which of the following controls the contrast of the CT image?

Windowing does not make use of the CT numbers.

Which of the following belongs to the class of nonlinear image manipulation techniques?

Through the manipulation of CT numbers of the various tissues, the picture can be changed to show soft tissues and dense structures such as bone.

The WW in CT is the:

Windowing is the most common image processing technique in CT.

Which of the following is a plot of the pixel values as a function of their frequency of occurrence?

Which of the following are not categories of three-dimensional rendering?

What happens to a CT image when the WL moves toward the lower CT numbers?

Coronal multiplanar reconstructions allow the observer to view the images in an anterior to posterior plane.

In which of the following are pixels in a certain region of the image made to appear brighter?

A large WW indicates that there is a relatively ______________ gray scale.

Preset window settings allow CT scanners to simultaneously display two different density ranges (different WW and WL) in order to define two different anatomic areas.

Gray-level mapping belongs to the class of:

When the WL is centered on the lungs, the image display is optimized for the lungs.