Question 1

Dynamic data acquisition during a multiple gated acquisition is linked to the

Accepted Answer

A)   P wave.
B)   R wave.
C)   SA node.
D)   Q wave. B

Question 2

The quality of the cardiac data during a MUGA can be compromised by

Accepted Answer

A)   breathing.
B)   bradycardia.
C)   tachycardia.
D)   PVCs. D

Question 3

Interpolation results in a loss of image data.

Accepted Answer

A) True 
 B)False  False

Question 4

Hardware magnification or zoom

Accepted Answer

A)   decreases resolution.
B)   increases noise.
C)   only increases image size.
D)   increases sensitivity.

Question 5

If a pixel can contain only 1 byte of information, and if the counts per pixel reaches 256 counts, pixel rollover may occur and would result in the

Accepted Answer

A)   averaging of all of the subsequent counts before storage.
B)   addition of the subsequent counts to the pixel counts.
C)   pixel value going back to 0.
D)   spillage of counts into the adjoining pixel.

Question 6

When using list mode to acquire a gated cardiac study, all of the following are true EXCEPT

Accepted Answer

A)   a significant amount of disk space is required to store the data.
B)   physiological markers are placed in the list of data.
C)   calculations can be made from selected data.
D)   timing marks are not needed for data collection.

Question 7

In an 8-bit color image, the range of displayed color intensities would be

Accepted Answer

A)   0 to 64.
B)   0 to 100.
C)   0 to 128.
D)   0 to 255.

Question 8

When using nine-point image smoothing, all of the following is true EXCEPT

Accepted Answer

A)   there is a slight increase in image resolution.
B)   there is a slight decrease in image resolution.
C)   there is a blending of pixel values.
D)   it creates a more aesthetic image.

Question 9

When using temporal smoothing

Accepted Answer

A)   noise is removed without loss of spatial resolution.
B)   noise is removed with a slight loss of spatial resolution.
C)   noise is not removed, but there is a slight increase in spatial resolution.
D)   results are the same as nine-point image smoothing except it is applied to dynamic studies.

Question 10

On a computer, image resolution

Accepted Answer

A)   deteriorates as the acquisition matrix size increases.
B)   deteriorates as the acquisition matrix size decreases.
C)   remains consistent across matrix size for a given camera.
D)   remains consistent across matrices if pixel rollover is controlled.

Question 11

Software magnification

Accepted Answer

A)   increases resolution.
B)   decreases noise.
C)   only increases image size.
D)   increases sensitivity.

Question 12

The image density for each pixel is determined by

Accepted Answer

A)   the gamma-ray counts stored within a pixel.
B)   the ratio of the z pulse to the x and y pulse.
C)   the counts detected minus the rollover counts.
D)   size of the matrices in which the pixels configured.

Question 13

In an imaging computer system, the analog-to-digital converter (ADC) allows for the

Accepted Answer

A)   localization of the appropriate pixel into which the gamma event is recorded.
B)   averaging of the x, y, and z pulses.
C)   processing of the energy pulse by the pulse-height analyzer.
D)   conversion of x and y information into analog format.

Question 14

Digital Imaging and Communications in Medicine (DICOM) is the standard for

Accepted Answer

A)   analog to digital conversion.
B)   filtering software.
C)   the system in each hospital for archiving EHRs.
D)   data set-up to allow for image transfer among systems.

Question 15

A 256 * 256 matrix has a smaller pixel size than does a 64 * 64 matrix.

Accepted Answer

A) True 
 B)False

Exam 9: Health Informatics in Imaging