CT COMPREHENSIVE EXAM 3 LATEST ACTUAL EXAM QUESTIONS AND CORRECT
ANSWERS (VERIFIED ANSWERS)
Which of the following refers to ensuring that the CT scanner performance and various
parameters fall within established acceptable limits?
a. Quality Control
b. Quality administration
c. Quality Assurance
d. Preventive Maintenance
a
A term used to describe the monitoring of the components of the CT scanner that affect dose and
image quality is:
a. Acceptance testing
b. Routine performance
c. Error correction
d. Preventive maintenance
b
Which of the following CT phantoms is used to assess the CTD?
a. Image performance phantom
b. Geometric phantom
c. instrumentation phantom
d. dosimetry phantom
a
The ACR CT accreditation phantom is designed to perform QC measurements of:
a. positioning accuracy and light accuracy alignment only
b. CT number accuracy and slice thickness only
c. low-contrast resolution, CT number uniformity, and high contrast resolution only
d. all are correct
d
The following are all basic tenets of a QC program for CT scanner except:
a. all phantoms must be kept in an air-conditioned room
b. all test results must be interpreted promptly
,c. faithful record keeping
d. QC tests must be conducted regularly
a
The QC test for the average CT number for water should be done:
a. daily
b. weekly
c. monthly
d. yearly
a
The ACR tolerance limit for the CT number accuracy for water is:
a. +7HU (+5HU preferred) ??
b. + 3 CT numbers
c. no tolerance limit has been established
d. +10HU (+2 preferred)
a
The following are possible cause of the failure for the standard deviation of the CT number for
water except:
a. electronic noise from the amplifiers
b. decreased dose
c. reconstruction algorithm mis-calibration
d. electronic noise form the analog-to-digital converters
c
The following QC test should be done on a monthly basis:
a. CT number calibration
b. standard deviation of the CT number in water
c. high-contrast resolution
d. noise
a
The ACR tolerance limits for the CT number uniformity is:
a.+10HU
b. CT number for water must not be greater than + 5HU from the center of the phantom to the
periphery
c. 0+4HU
, d. the center CT number be between +7HU (+5HU preferred). Adult abdomen protocol must be
used
d
Which of the following applies to the two basic tenets and other considerations when imaging
the pediatric patient with the CT scanner?
1. knowledgeable
2. always prepared and honest with the family of the patient
3. use of friendly and an appropriately decorated environment
a. 1 and 2
b. 2 and 3
c. 3 only
d. 1, 2, and 3
d
The advantages of using MDCT scanner (compared to SSCT scanner) to image the pediatric
patient include all of the following except:
a. faster data acquisition
b. increased volume coverage
c. better patient tolerance and better use of contrast media
d. potential increase in radiation dose especially when using imaging thin slices
d
The introduction of MDCT scanner to image pediatric patients provides the following
applications:
a. volume-rendered 3D images
b. surface-rendered 3D images
c. CT angiography and CT colonoscopy
d. all are correct
d
Sedated pediatric CT patients are monitored for ALL the following except:
a. temperature
b. respiratory rate
c. pulse oximetry
d. blood pressure
a
ANSWERS (VERIFIED ANSWERS)
Which of the following refers to ensuring that the CT scanner performance and various
parameters fall within established acceptable limits?
a. Quality Control
b. Quality administration
c. Quality Assurance
d. Preventive Maintenance
a
A term used to describe the monitoring of the components of the CT scanner that affect dose and
image quality is:
a. Acceptance testing
b. Routine performance
c. Error correction
d. Preventive maintenance
b
Which of the following CT phantoms is used to assess the CTD?
a. Image performance phantom
b. Geometric phantom
c. instrumentation phantom
d. dosimetry phantom
a
The ACR CT accreditation phantom is designed to perform QC measurements of:
a. positioning accuracy and light accuracy alignment only
b. CT number accuracy and slice thickness only
c. low-contrast resolution, CT number uniformity, and high contrast resolution only
d. all are correct
d
The following are all basic tenets of a QC program for CT scanner except:
a. all phantoms must be kept in an air-conditioned room
b. all test results must be interpreted promptly
,c. faithful record keeping
d. QC tests must be conducted regularly
a
The QC test for the average CT number for water should be done:
a. daily
b. weekly
c. monthly
d. yearly
a
The ACR tolerance limit for the CT number accuracy for water is:
a. +7HU (+5HU preferred) ??
b. + 3 CT numbers
c. no tolerance limit has been established
d. +10HU (+2 preferred)
a
The following are possible cause of the failure for the standard deviation of the CT number for
water except:
a. electronic noise from the amplifiers
b. decreased dose
c. reconstruction algorithm mis-calibration
d. electronic noise form the analog-to-digital converters
c
The following QC test should be done on a monthly basis:
a. CT number calibration
b. standard deviation of the CT number in water
c. high-contrast resolution
d. noise
a
The ACR tolerance limits for the CT number uniformity is:
a.+10HU
b. CT number for water must not be greater than + 5HU from the center of the phantom to the
periphery
c. 0+4HU
, d. the center CT number be between +7HU (+5HU preferred). Adult abdomen protocol must be
used
d
Which of the following applies to the two basic tenets and other considerations when imaging
the pediatric patient with the CT scanner?
1. knowledgeable
2. always prepared and honest with the family of the patient
3. use of friendly and an appropriately decorated environment
a. 1 and 2
b. 2 and 3
c. 3 only
d. 1, 2, and 3
d
The advantages of using MDCT scanner (compared to SSCT scanner) to image the pediatric
patient include all of the following except:
a. faster data acquisition
b. increased volume coverage
c. better patient tolerance and better use of contrast media
d. potential increase in radiation dose especially when using imaging thin slices
d
The introduction of MDCT scanner to image pediatric patients provides the following
applications:
a. volume-rendered 3D images
b. surface-rendered 3D images
c. CT angiography and CT colonoscopy
d. all are correct
d
Sedated pediatric CT patients are monitored for ALL the following except:
a. temperature
b. respiratory rate
c. pulse oximetry
d. blood pressure
a
