Test Android StudyStack App
Please help StudyStack get a grant! Vote here.
or...
Reset Password Free Sign Up


incorrect cards (0)
correct cards (0)
remaining cards (0)
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the Correct box, the DOWN ARROW key to move the card to the Incorrect box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

Correct box contains:
Time elapsed:
Retries:
restart all cards



Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

adv img CT 1

advanced imaging - CT set 1

QuestionAnswer
Narrow window width produces what? short scale
Wide window width produces what? long scale
Window allows the viewer to alter what? contrast
Window level controls what? density
Window width controls what? contrast
BUN number range for contrast: 7-18
Creatnine number range for contrast: .6-1.5
A “viscous” material is: thick
CTDI dose to pt within the primary beam
MSAD average dose pt receives during an exam
Noise in CT is: the variation in CT numbers above and below 0
Linearity: calibration of CT scanner so that water = 0
Most important component of the CT QC program is: spatial resolution test (bar or hole pattern)
Laser localizer for CT should be how accurate? to within +/- 1mm
How does pt dose change with slice thickness? thinner slices = more pt dose
Scintillation detector made of crystal with 50% detector efficiency. Most common.
Pre-patient collimation controls: pt dose
Postpatient (pre-detector) collimation controls: slice thickness
How must the CT computer be stored? in a cool dry place, under 68 degrees and 30% relative humidity
Formula for pixel size FOV / matrix size
Formula for voxel pixel size X slice thickness
CT numbers +1000 represent : hard bone
CT numbers -1000 represent: air
Ct numbers 0 represent : water
CT number range for lung tissue: -250 to -850
CT number range for blood fluid: +25 to +50
Created by: annaluz87 on 2009-08-06



Copyright ©2001-2014  StudyStack LLC   All rights reserved.