MOSBY CT TEST PAPER EXAM ALL QUESTIONS AND
ANSWERS SURE A+
✔✔Which of the following is NOT an advantage of dual source CT scanner over a
single source CT scanner - ✔✔*Decreased temporal resoulution
✔✔Which of the following is an advantage of dual source CT scanner over a single
source CT scanner - ✔✔*One step bone removal
*Increased temporal resolution
*Differentiation of kidney stones
*Ability to characterize different tissues e.g. tendons and ligament
✔✔It is determined that a patient has a stone present in the middle section of the ureter.
Which of these is MOST likely a symptom the patient will exhibit?
Hematuria.
Upper abdominal pain.
Anterior abdominal pain.
Dysuria. - ✔✔Anterior abdominal pain
https://www.examedge.com
✔✔A stone in the middle section of the ureter will likely cause - ✔✔anterior abdominal
pain and flank pain
IMAGE IS FLANK PAIN
https://www.examedge.com
✔✔This term refers to how rapidly data are acquired. It is controlled by gantry rotation
speed, the number of detector channels in the system, and the speed with which the
system can record changing signals - ✔✔Temporal resolution
✔✔This term refers to the speed that the data can be acquired - ✔✔Temporal resolution
✔✔One of the major challenges for imaging a rapidly beating heart is that the imaging
modality - ✔✔must provide high temporal resolution
✔✔The ability of the tube to withstand by-product heat is called which of the following? -
✔✔heat capacity
✔✔This is also known as shaded-surface display (SSD) - ✔✔Surface rendering
,✔✔Which component of the CT system converts the electric signal supplied by the
detectors into a digital format. - ✔✔analog-to-digital converter
✔✔This system measures the number of photons that strike the detector, converts the
information to a digital signal, and sends the signal to the computer? - ✔✔Analog-to-
digital converter
✔✔A precise set of steps to be performed in a specific order to solve a problem
describes - ✔✔an algorithm
✔✔This is a technique for expressing a waveform as a weighted sum of sines and
cosines. - ✔✔Algorithm
✔✔The central processing unit (CPU) performs what function - ✔✔B. Interprets
computer program instructions and sequences tasks.
✔✔The DAS reads each arriving ray and measures how much of the beam has been
attenuated. This is? - ✔✔ray sum
✔✔A third-generation scanner design is one in which - ✔✔both the tube and the
detector move in a circle within the gantry.
✔✔This generaton of scanner design is one in which the x-ray tube is placed opposite
the detector array and both the tube and the detector move in a circle within the gantry.
- ✔✔3rd AKA third-generation scanner
✔✔Which of the following attributes are found in 3rd generation CT scanners but not 4th
generation CT scanners? - ✔✔Both the x-ray tube and the detector array rotate
✔✔Which of the following is true about artifacts?
They are not related to the subject.
They are related to the subject.
They can be either related or not related to the subject.
They do not affect the image being produced. - ✔✔Correct Answer:
They are not related to the subject
https://www.examedge.com
✔✔If metal is present in a scan, it can cause - ✔✔artifacts
, https://www.examedge.com
✔✔This term is considered an error or distortion in the image being produced. -
✔✔artifacts
https://www.examedge.com
✔✔The main cause of a image quality decrease is - ✔✔artifacts
https://www.examedge.com
✔✔This term can cause completed images to be useless. - ✔✔Artifacts
https://www.examedge.com
✔✔Which generation of CT scanners are more common for ring artifacts - ✔✔3rd
generation
✔✔ring, tube and out of field are what type of artifact - ✔✔Hardware based artifacts
https://www.examedge.com
✔✔windmill artifact, cone beam effect, MPR artifact are what type of artifact - ✔✔Helical
and multichannel artifacts
https://www.examedge.com
✔✔windmill artifact - ✔✔
✔✔beam hardening, partial volume averaging, quantum mottle, photon starvation,
aliasing in CT are what type of artifact - ✔✔physics based artifacts
https://www.examedge.com
✔✔aliasing - ✔✔
✔✔photon starvation - ✔✔
✔✔beam hardening - ✔✔
✔✔partial volume averaging - ✔✔
✔✔quantum mottle - ✔✔
ANSWERS SURE A+
✔✔Which of the following is NOT an advantage of dual source CT scanner over a
single source CT scanner - ✔✔*Decreased temporal resoulution
✔✔Which of the following is an advantage of dual source CT scanner over a single
source CT scanner - ✔✔*One step bone removal
*Increased temporal resolution
*Differentiation of kidney stones
*Ability to characterize different tissues e.g. tendons and ligament
✔✔It is determined that a patient has a stone present in the middle section of the ureter.
Which of these is MOST likely a symptom the patient will exhibit?
Hematuria.
Upper abdominal pain.
Anterior abdominal pain.
Dysuria. - ✔✔Anterior abdominal pain
https://www.examedge.com
✔✔A stone in the middle section of the ureter will likely cause - ✔✔anterior abdominal
pain and flank pain
IMAGE IS FLANK PAIN
https://www.examedge.com
✔✔This term refers to how rapidly data are acquired. It is controlled by gantry rotation
speed, the number of detector channels in the system, and the speed with which the
system can record changing signals - ✔✔Temporal resolution
✔✔This term refers to the speed that the data can be acquired - ✔✔Temporal resolution
✔✔One of the major challenges for imaging a rapidly beating heart is that the imaging
modality - ✔✔must provide high temporal resolution
✔✔The ability of the tube to withstand by-product heat is called which of the following? -
✔✔heat capacity
✔✔This is also known as shaded-surface display (SSD) - ✔✔Surface rendering
,✔✔Which component of the CT system converts the electric signal supplied by the
detectors into a digital format. - ✔✔analog-to-digital converter
✔✔This system measures the number of photons that strike the detector, converts the
information to a digital signal, and sends the signal to the computer? - ✔✔Analog-to-
digital converter
✔✔A precise set of steps to be performed in a specific order to solve a problem
describes - ✔✔an algorithm
✔✔This is a technique for expressing a waveform as a weighted sum of sines and
cosines. - ✔✔Algorithm
✔✔The central processing unit (CPU) performs what function - ✔✔B. Interprets
computer program instructions and sequences tasks.
✔✔The DAS reads each arriving ray and measures how much of the beam has been
attenuated. This is? - ✔✔ray sum
✔✔A third-generation scanner design is one in which - ✔✔both the tube and the
detector move in a circle within the gantry.
✔✔This generaton of scanner design is one in which the x-ray tube is placed opposite
the detector array and both the tube and the detector move in a circle within the gantry.
- ✔✔3rd AKA third-generation scanner
✔✔Which of the following attributes are found in 3rd generation CT scanners but not 4th
generation CT scanners? - ✔✔Both the x-ray tube and the detector array rotate
✔✔Which of the following is true about artifacts?
They are not related to the subject.
They are related to the subject.
They can be either related or not related to the subject.
They do not affect the image being produced. - ✔✔Correct Answer:
They are not related to the subject
https://www.examedge.com
✔✔If metal is present in a scan, it can cause - ✔✔artifacts
, https://www.examedge.com
✔✔This term is considered an error or distortion in the image being produced. -
✔✔artifacts
https://www.examedge.com
✔✔The main cause of a image quality decrease is - ✔✔artifacts
https://www.examedge.com
✔✔This term can cause completed images to be useless. - ✔✔Artifacts
https://www.examedge.com
✔✔Which generation of CT scanners are more common for ring artifacts - ✔✔3rd
generation
✔✔ring, tube and out of field are what type of artifact - ✔✔Hardware based artifacts
https://www.examedge.com
✔✔windmill artifact, cone beam effect, MPR artifact are what type of artifact - ✔✔Helical
and multichannel artifacts
https://www.examedge.com
✔✔windmill artifact - ✔✔
✔✔beam hardening, partial volume averaging, quantum mottle, photon starvation,
aliasing in CT are what type of artifact - ✔✔physics based artifacts
https://www.examedge.com
✔✔aliasing - ✔✔
✔✔photon starvation - ✔✔
✔✔beam hardening - ✔✔
✔✔partial volume averaging - ✔✔
✔✔quantum mottle - ✔✔
