CT Imaging Procedures Test: Quiz!

52 Questions | By Leclark | Updated: Mar 22, 2022 | Attempts: 4719

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CT Imaging Procedures Test: Quiz! - Quiz

Doctors use a computed tomography(CT) scan to view your body's inner organs, like bones and tissues, to diagnose diseases and evaluate injuries. Through CT scans, doctors can see and observe your body's various parts like bones of the shoulders, spine, abdomen, etc. This quiz will evaluate your knowledge about CT imaging procedures.

Questions and Answers

1.

High resolution CT is most commonly used for the evaluation of the:
- A.
  
  Pancreas
- B.
  
  Brain
- C.
  
  Lung
- D.
  
  Mediastinum
2.

During a CT guided needle biopsy, the needle insertion site is usually anaesthetized with:
- A.
  
  Diazepam
- B.
  
  Lidocaine
- C.
  
  Lithium
- D.
  
  Oxycodone HCI
3.

Which of the following abnormal findings reduces the density of the liver?
- A.
  
  Hyperdense cyst
- B.
  
  Contrast enhancing tumor
- C.
  
  Fatty liver
- D.
  
  All the above
4.

Which of the following sets of section widths and spacing is the most suitable for a general survey CT of the neck?
- A.
  
  1.5 mm thick every 1.5
- B.
  
  3mm thick every 5mm
- C.
  
  5mm thick every 5mm
- D.
  
  10mm thick every 10mm
5.

The _________ gland is located in the AP portion of the mediastinum and is often identified with CT when scanning younger PT's.
- A.
  
  Thyroid
- B.
  
  Luschka
- C.
  
  Thymus
- D.
  
  Parathyroid
6.

Which of the following CT Studies of the head may be performed W/O contrast?
- A.
  
  CT angiogram for the Circle of Willis
- B.
  
  Coronal CT scan to rule out pituitary tumor
- C.
  
  CT of the brain to r/o hematoma
- D.
  
  CT of the brain to r/o metastatic disease
7.

CT scanning of the liver for tumor evaluation should not be performed during which of the following phases of contrast enhancement.
- A.
  
  Non equilibrium phase
- B.
  
  Equilibrium phase
- C.
  
  Dynamic phase
- D.
  
  Bolus phase
8.

The Kidneys are located anatomically between which vertebrae.
- A.
  
  T6 and L2
- B.
  
  T12 and L3
- C.
  
  L2 and L4
- D.
  
  L3 and S1
9.

Axial CT images of the knee may be acquired in five separate series with knee flexions of 0, 15, 30, and 45 degrees in order to demonstrate the:
- A.
  
  Tibial plateau
- B.
  
  Patellofemoral joint
- C.
  
  Medial and lateral menisci
- D.
  
  Anterior cruciate ligament
10.

CT images acquired of the foot in a plane perpendicular to the long axis of the scout image shown are considered __________ images.
- A.
  
  Axial
- B.
  
  Sagittal
- C.
  
  Coronal
- D.
  
  Transaxial
11.

Which of the following is used to describe a set of rules for solving a mathematical problem?
- A.
  
  Reconstruction
- B.
  
  Algorithm
- C.
  
  Function
- D.
  
  Array
12.

A 15 second spiral CT scan of the pelvis is performed using 1.0cm aperture size. If a pitch of 1:1 was used for the total length of coverage for this scan would be:
- A.
  
  50cm
- B.
  
  100cm
- C.
  
  150cm
- D.
  
  250cm
13.

A CT image should be viewed on the monitor in which of the following orientations.
- A.
  
  From the feet toward the head with PT's left on the viewers left
- B.
  
  From the feet toward the head with the PT's left on the viewers right
- C.
  
  From the head toward the feet with the PT's right on the viewers right
- D.
  
  From the head toward the feet with the PT's right on the viewers left
14.

In which of the following cranial nerves would an acoustic neuroma be found?
- A.
  
  Third
- B.
  
  Eighth
- C.
  
  Tenth
- D.
  
  Twelfth
15.

Which of the following interscan delays would be used for a dynamic CT study of the chest?
- A.
  
  4 sec
- B.
  
  8 sec
- C.
  
  12 sec
- D.
  
  15 sec
16.

Which of the following types of pathologic conditions cannot be easily diagnosed from a CT Scan of the brain?
- A.
  
  Astrocytoma
- B.
  
  Traumatic herorrhage
- C.
  
  Cerebral infarct
- D.
  
  Alzheimers disease
17.

Most pancreatic tumors occur in the pancreatic.
- A.
  
  Head
- B.
  
  Body
- C.
  
  Tail
- D.
  
  Uncinate process
18.

Before scanning the liver after a bolus injection of contrast, a delay of ___ should be applied.
- A.
  
  0 sec
- B.
  
  20 sec
- C.
  
  45 sec
- D.
  
  120 sec
19.

Which of the following technical changes may increase the partial volume effect present on a spiral CT scan?
- A.
  
  Decrease in pitch
- B.
  
  Decrease in aperture size
- C.
  
  Increase in matrix size
- D.
  
  Increase in pitch
20.

During which of the following CT exams is misregistration artefact most likely to occur:
- A.
  
  Brain
- B.
  
  Pelvis
- C.
  
  Neck
- D.
  
  Abdomen
21.

Which of the following mathematical functions may be used to quantify the spatial resolution of a CT scanner? 1 PSF 2 MTF 3 LSF
- A.
  
  2 only
- B.
  
  1 and 2
- C.
  
  2 and 3
- D.
  
  1, 2, and 3
22.

The matrix size describes which of the following:
- A.
  
  Aperture size used during data acquistion
- B.
  
  Number of pixels used to display an image
- C.
  
  Relationship between the FOV and algorithm
- D.
  
  None of the above
23.

Which of the following is not an iterative method of CT image reconstruction
- A.
  
  Point by point correction
- B.
  
  Fourier transform
- C.
  
  Simultaneous reconstruction
- D.
  
  Ray by ray correction
24.

In the following formula used to calculate the linear attenuation coefficient, I=Ioe -ux, the symbol Io identifies
- A.
  
  Eulers constant
- B.
  
  Incident intensity
- C.
  
  Absorber thickness
- D.
  
  Transmitted intensity
25.

Which of the following would increase the noise of a CT image?
- A.
  
  Increased MAS
- B.
  
  Decreased aperture size
- C.
  
  Decreased filtration
- D.
  
  Decreased matrix size