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Doubling the matrix______ the number of pixels in
quadruples
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Which of following types of studies has the greatest ability to be manipulated TEMPORALLY to suite different clinical requirements?
list mode
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How well an image is sampled depends on adjusting what?
pixel size
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In gated cardiac acquisition
each cardiac cycle is divided into multiple frames
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Matrix size refers to:
number of pixels
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For better resolution of smallest objects in the FOV, an ideal choice of pixel size would be:
1/3rd of the system spatial resolution
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In word mode acquisition, each pixel can hold a maximum of how many counts?
65,535
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Software zoom magnifies image by:
pixel replication
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An acquisition zoom factor of 2 means:
field of view is halved
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In byte mode acquisition, each pixel can hold a maximum of how many counts?
255
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Images can be viewed DURING acquisition in all of the following, EXCEPT
list mode
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Temporal (time) information of radioactivity concentration in the body can be obtained by all of the following acquisition modes, EXCEPT
static frame mode
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How much memory is required to collect a MUGA study acquired in a 64 x 64 word mode matrix, 16 frames/cycle?
128KB
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For a given FOV, pixel size decreases as matrix size
increases
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Does Software zoom increases spatial resolution of objects?
no
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A camera has a field of view of 51cm2. If a 128x128 matrix is used with a zoom factor of 1.6 what will be the new FOV?
32cm2
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In gated cardiac acquisition:
each cardiac cycle is divided into multiple frames
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In zoom mode acquisition, increase in spatial resolution is achieved by increasing the number of pixels in FOV.
false
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Matrix size refers to
number of pixels
-
For better resolution of smallest objects in the FOV, an ideal choice of pixel size would be:
1/3 of the system spatial resolution
-
Software zoom magnifies image by:
pixel replication
-
The maximum number of counts A PIXEL can hold is NOT affected by the matrix size
true
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An acquisition zoom factor of 2 means:
the FOV is halved
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