Community College of Denver- RTE 257 Mosby CT
Registry Review EXAM SPRING TEST BANK /ACTUAL
COMPLETE REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) A + GRADE.
The following are all basic tenets of a QC program for computed
tomography scanner
*QC test must be conducted regularly
*Accurate record keeping
*all test results must be interpreted promptly
Using the ACR CT accreditation phantom, module 3 is used to measure
which of the following
CT number uniformity
The following QC test should be done on a monthly basis
high contrast resolution
,The CT number at the center of a uniformly filled water phantom should
ideally be
0
The ACR CT accreditation phantom is designed to perform QC
measurements of
*positioning accuracy and light accuracy alignment only
*CT number accuracy and slice thickness only
*low contrast resolution, CT number uniformity, and high contrast
resolution
The ACR tolerance limit for the CT number accuracy for water is
+-7HU or +-5 preferred
The test for the average CT number of water should be tested at
*acceptance
*daily
,The ACR tolerance limit for the CT number uniformity is which of the
following
The center CT number must be between plus or minus 7HU plus the
abdomen protocol must be used
A CT scan produces a 512x512 matrix transverse image of a 30 cm
diameter FOV. Each pixel is approximately _____ mm on a side.
0.6 equation: 30cm/512= .058cm convert to mm and its .58 which is
approximately 0.6
The ability of a system to define small objects distinctly is referred to as
which of the following?
spatial resolution
Which of the following terms is/are commonly used to describe a CT
scanner's ability to differentiate objects with similar linear attenuation
coeffiecents
*spatial resolution
*sensitivity
, Which of the following factors have an affect on contrast resolution
*patient size
*slice thickness
*pixel size
*mAs/dose
As mAs/dose increases contrast resolution decreases
FALSE
As mAs/dose increases contrast resolution INCREASES
TRUE
The ability of a CT scanner to accurately image objects with similar
densities is termed
*contrast resolution
*sensitivity
Registry Review EXAM SPRING TEST BANK /ACTUAL
COMPLETE REAL EXAM QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) A + GRADE.
The following are all basic tenets of a QC program for computed
tomography scanner
*QC test must be conducted regularly
*Accurate record keeping
*all test results must be interpreted promptly
Using the ACR CT accreditation phantom, module 3 is used to measure
which of the following
CT number uniformity
The following QC test should be done on a monthly basis
high contrast resolution
,The CT number at the center of a uniformly filled water phantom should
ideally be
0
The ACR CT accreditation phantom is designed to perform QC
measurements of
*positioning accuracy and light accuracy alignment only
*CT number accuracy and slice thickness only
*low contrast resolution, CT number uniformity, and high contrast
resolution
The ACR tolerance limit for the CT number accuracy for water is
+-7HU or +-5 preferred
The test for the average CT number of water should be tested at
*acceptance
*daily
,The ACR tolerance limit for the CT number uniformity is which of the
following
The center CT number must be between plus or minus 7HU plus the
abdomen protocol must be used
A CT scan produces a 512x512 matrix transverse image of a 30 cm
diameter FOV. Each pixel is approximately _____ mm on a side.
0.6 equation: 30cm/512= .058cm convert to mm and its .58 which is
approximately 0.6
The ability of a system to define small objects distinctly is referred to as
which of the following?
spatial resolution
Which of the following terms is/are commonly used to describe a CT
scanner's ability to differentiate objects with similar linear attenuation
coeffiecents
*spatial resolution
*sensitivity
, Which of the following factors have an affect on contrast resolution
*patient size
*slice thickness
*pixel size
*mAs/dose
As mAs/dose increases contrast resolution decreases
FALSE
As mAs/dose increases contrast resolution INCREASES
TRUE
The ability of a CT scanner to accurately image objects with similar
densities is termed
*contrast resolution
*sensitivity
