Exam 2: Digital Imaging Processing Concepts

Where do MRIs acquire data from the patient?

____ involves averaging a set of images to reduce image noise.

The greater the ____________________, the more accurately the signals from the detectors can be digitized for a faithful reproduction of the original signal.

Geometric operations result in the scaling, sizing, rotation, and translation of images to enhance diagnosis.

One popular ____________________ operation is to use the FT in filtering images in the frequency domain rather than in the spatial location domain.

A(n)____________________ is a graph of the number of pixels in the entire image or part of the image having the same gray levels (density values)plotted as a function of the gray levels.

There are several operations used in digital image processing to transform an output image into an input image to suit the needs of the human observer.

Which process is intended to sharpen an input image in the spatial domain that appears blurred?

If the values of the histogram are concentrated in the upper end of the range of values, the image appears dark.

A digital image can be described with respect to several characteristics or fundamental parameters, including the matrix, pixels, voxels, and the bit depth.

Pixels in a digital image represent the information contained in a volume of tissue in the patient.What is this volume called?

Since digital radiographic detectors have wide exposure latitude and a linear response, an image displayed without processing might appear as a ____.

Digital imaging modalities such as CT, MRI, diagnostic ultrasound, and nuclear medicine incorporate digital image processing as an essential tool to manipulate and enhance ___________________.

The purpose of ____________________ of digital images is to reduce the size of the image in order to decrease transmission time and reduce storage space.

Education programs for both technologists and ____________________ are also beginning to incorporate digital image processing as part of their curriculum.

In digital radiography, which of the following is a numerical representation of the patient?

A more recent form of compression that has been receiving attention in digital diagnostic imaging is that of ____________________ compression.

Which of the following is intended to reduce noise and the displayed brightness levels of pixels?

Which of the following processing operations is simple and the one most frequently used in digital diagnostic imaging?

What can be located using the X-Y coordinate system?