Mosby CT Exam 3 Questions and
Answers44
MDCT systems typically employ which of the following types of detectors?
a. tungsten ring
b. solid-state scintillation
c. charged coupled device
d. gas ionization - ANSWERS-b. solid-state scintillation
Which of the following technical adjustments may be employed to reduce step artifact in a
multiplanar reformation CT image?
1. acquisition of an isotropic data set
2. overlapping section increment
3. increase in eff(?)
a. 1 only
b. 1 & 2 only
c. 2 & 3 only
d. 1, 2 & 3 - ANSWERS-b. 1 & 2 only
Which of the following is a manifestation of the partial volume artifact?
a. cupping
b. Hounsfield bar
c. aliasing
d. streaking - ANSWERS-a. cupping
,During volumetric CT acquisition, the slice sensitivity profile (SSP) graphically represents the:
a. effective section width
b. dose profile
c. beam width
d. detector collimation - ANSWERS-a. effective section width
An increase in the sampling rate during CT data acquisition corresponds to an increase in:
a. views per rotation
b. patient radiation dose
c. image noise
d. matrix size - ANSWERS-a. view per rotation
The use of water as an oral contrast material for CT of the abdomen and/or pelvis has several
potential advantages, including:
1. increased palatability and improved patient comfort
2. better demonstration of enhancing bowel wall
3. no interference with 3D applications
a. 1 only
b. 1 & 2 only
c. 1 & 3 only
d. 1, 2 & 3 - ANSWERS-d. 1, 2 & 3
A patient's blood pressure is measured as 140/70 mm Hg. The number 140 represents:
a. the pressure within the arterial vessels during contraction of the heart
,b. the pressure exerted on the chambers of the heart while it is relaxed
c. the pressure within the arterial vessels while the heart is relaxed
d. the pressure exerted on the chambers of the heart while it is contracted - ANSWERS-a. the
pressure within the arterial vessels during contraction of the heart
A(n) ___ contrast material may be described as one that does not dissociate into charged
particles in solution.
a. neutral
b. nonionic
c. osmolar
d. ionic - ANSWERS-b. nonionic
Proper immobilization during a CT procedure may involve the use of:
1. Velcro straps
2. adhesive medical tape
3. good patient communication
a. 1 only
b. 1 & 2 only
c. 1 & 3 only
d. 1, 2 & 3 - ANSWERS-c. 1 & 3 only
The normal range of GFR for men is:
a. 50 ±14 mL/min/m2
b. 60 ±10 mL/min/m2
c. 70 ±14 mL/min/m2
d. 80 ±10 mL/min/m2 - ANSWERS-c. 70 ±14 mL/min/m2
, Risk factors for contrast induced nephrotoxicity (CIN) include:
1. diabetes 2. advanced age 3. hematuria
a. 1 only
b. 3 only
c. 1 & 2 only
d. 1, 2 & 3 - ANSWERS-c. 1 & 2 only
The reduction in number of infectious organisms without a complete elimination is termed:
a. medical asepsis
b. sterilization
c. surgical asepsis
d. immunization - ANSWERS-a. medical asepsis
Which of the following is the preferred range for patient heart rate for optimal cardiac CT
studies?
a. 65-75 bpm
b. 75-85 bpm
c. 85-95 bpm
d. >100 bpm - ANSWERS-a. 65-75 bpm
Urticaria is which of the following?
a. severe nausea with associated vomiting
b. urinary tract infection
c. hives
d. bronchospasm - ANSWERS-c. hives
Answers44
MDCT systems typically employ which of the following types of detectors?
a. tungsten ring
b. solid-state scintillation
c. charged coupled device
d. gas ionization - ANSWERS-b. solid-state scintillation
Which of the following technical adjustments may be employed to reduce step artifact in a
multiplanar reformation CT image?
1. acquisition of an isotropic data set
2. overlapping section increment
3. increase in eff(?)
a. 1 only
b. 1 & 2 only
c. 2 & 3 only
d. 1, 2 & 3 - ANSWERS-b. 1 & 2 only
Which of the following is a manifestation of the partial volume artifact?
a. cupping
b. Hounsfield bar
c. aliasing
d. streaking - ANSWERS-a. cupping
,During volumetric CT acquisition, the slice sensitivity profile (SSP) graphically represents the:
a. effective section width
b. dose profile
c. beam width
d. detector collimation - ANSWERS-a. effective section width
An increase in the sampling rate during CT data acquisition corresponds to an increase in:
a. views per rotation
b. patient radiation dose
c. image noise
d. matrix size - ANSWERS-a. view per rotation
The use of water as an oral contrast material for CT of the abdomen and/or pelvis has several
potential advantages, including:
1. increased palatability and improved patient comfort
2. better demonstration of enhancing bowel wall
3. no interference with 3D applications
a. 1 only
b. 1 & 2 only
c. 1 & 3 only
d. 1, 2 & 3 - ANSWERS-d. 1, 2 & 3
A patient's blood pressure is measured as 140/70 mm Hg. The number 140 represents:
a. the pressure within the arterial vessels during contraction of the heart
,b. the pressure exerted on the chambers of the heart while it is relaxed
c. the pressure within the arterial vessels while the heart is relaxed
d. the pressure exerted on the chambers of the heart while it is contracted - ANSWERS-a. the
pressure within the arterial vessels during contraction of the heart
A(n) ___ contrast material may be described as one that does not dissociate into charged
particles in solution.
a. neutral
b. nonionic
c. osmolar
d. ionic - ANSWERS-b. nonionic
Proper immobilization during a CT procedure may involve the use of:
1. Velcro straps
2. adhesive medical tape
3. good patient communication
a. 1 only
b. 1 & 2 only
c. 1 & 3 only
d. 1, 2 & 3 - ANSWERS-c. 1 & 3 only
The normal range of GFR for men is:
a. 50 ±14 mL/min/m2
b. 60 ±10 mL/min/m2
c. 70 ±14 mL/min/m2
d. 80 ±10 mL/min/m2 - ANSWERS-c. 70 ±14 mL/min/m2
, Risk factors for contrast induced nephrotoxicity (CIN) include:
1. diabetes 2. advanced age 3. hematuria
a. 1 only
b. 3 only
c. 1 & 2 only
d. 1, 2 & 3 - ANSWERS-c. 1 & 2 only
The reduction in number of infectious organisms without a complete elimination is termed:
a. medical asepsis
b. sterilization
c. surgical asepsis
d. immunization - ANSWERS-a. medical asepsis
Which of the following is the preferred range for patient heart rate for optimal cardiac CT
studies?
a. 65-75 bpm
b. 75-85 bpm
c. 85-95 bpm
d. >100 bpm - ANSWERS-a. 65-75 bpm
Urticaria is which of the following?
a. severe nausea with associated vomiting
b. urinary tract infection
c. hives
d. bronchospasm - ANSWERS-c. hives
