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Cardiac - MUGA

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CAMRT Nuclear Medicine Technology (Clinical) Quiz on Cardiac - MUGA, created by Siobhan Pett on 01/07/2020.
Siobhan Pett
Quiz by Siobhan Pett, updated more than 1 year ago
Siobhan Pett
Created by Siobhan Pett over 4 years ago
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Resource summary

Question 1

Question
When performing a gated equilibrium cardiac study, which of the following anatomical views best separates the right and left ventricles?
Answer
  • left lateral
  • left anterior oblique
  • left posterior oblique
  • anterior
  • posterior

Question 2

Question
When positioning a patient for an LAO view of a gated equilibrium ventricular function study, tilting the camera toward the patient's feet separates which two structures?
Answer
  • left ventricle and aorta
  • right ventricle and aorta
  • left ventricle and left atrium
  • left and right ventricles
  • left and right atria

Question 3

Question
What is the left ventricle ejection fraction calculated from the following net counts per minute? End diastole: 2875 End systole: 2162
Answer
  • 25%
  • 13%
  • 33%
  • 100%
  • 75%

Question 4

Question
On the basis of the following data, what are the net counts of the cardiac region of interest? Cardiac ROI: 28,503 counts in 417 pixels Background ROI: 1859 counts in 88 pixels
Answer
  • 28,065
  • 19,694
  • 26,644
  • 15,463
  • 14,652

Question 5

Question
Given a heart rate of 85 bpm, if a 24-frame gated cardiac study is acquired, the length of each frame in milliseconds is:
Answer
  • 0.06 msec
  • 0.3 msec
  • 705 msec
  • 29 msec
  • 0.03 msec

Question 6

Question
When performed a left ventricular function examination with 99mTc-RBCs, which of these angles should be adjusted to visually separate the ventricles from one another?
Answer
  • anterior
  • left lateral
  • left anterior oblique
  • both anterior and LAO
  • left posterior oblique

Question 7

Question
What is the percent ejection fraction calculated from the following data? Diastole: 2750 cpm Systole: 1775 cpm
Answer
  • 61
  • 55
  • 22
  • 35
  • 12

Question 8

Question
Which wave of the ECG is used to trigger the scintillation camera to acquire counts?
Answer
  • P
  • R
  • T
  • U
  • V

Question 9

Question
Which of the following is most likely to interfere with calculating a left ventricle ejection fraction using gated equilibrium imaging?
Answer
  • doxorubicin toxicity
  • coronary artery disease
  • cardiomyopathy
  • cardiac arrhythmia
  • stroke

Question 10

Question
Which of the following will NOT give information on left ventricular function?
Answer
  • gated equilibrium radionuclide angiography
  • gated myocardial perfusion imaging
  • ungated first-pass study
  • gated myocardial PET
  • ungated myocardial SPECT

Question 11

Question
A patient has an enlarged left atrium. When drawing an ROI for calculation of LVEF after radionuclide angiography, the technologist includes some activity from the left atrium. The resulting ejection fraction would:
Answer
  • be unchanged
  • be falsely elevated
  • be falsely lowered
  • show akinesis
  • show paradoxical wall motion

Question 12

Question
What is the advantage of acquiring 32 over 16 frames/cardiac cycle?
Answer
  • Increased detail of diastolic filling parameters on volume curve
  • Increased statistics per frame to increase spatial resolution
  • Less chance of the flicker artifact
  • There is no advantage of acquiring 32 frames
  • Increased contrast resolution

Question 13

Question
How would these ROIs affect the resulting left ventricle ejection fraction?
Image:
Muga1 (binary/octet-stream)
Answer
  • overestimation of the LVEF
  • underestimation of the LVEF
  • flickering of the processed data
  • there would be no effect on the results

Question 14

Question
Which of the following functional parameters can be determined by a gated blood pool study? 1. Regional wall motion 2. Ventricular filling rate 3. Cardiac shunt quantification 4. End systolic ventricular volume
Answer
  • 1 only
  • 2 and 4
  • 1 and 2
  • 1, 2, 3, and 4
  • 1, 2, and 4

Question 15

Question
Which view best displays the posterior wall of the heart?
Answer
  • ANT
  • LAO
  • LLAT
  • RPO
  • LPO

Question 16

Question
What is the purpose of Fourier Transformation on MUGA data?
Answer
  • to produce phase and amplitude images
  • provide spatial smoothing to make edge detection easier
  • to reject bad heartbeats
  • to temporarily store data so that it may be manipulated at a later time

Question 17

Question
Which of the following is NOT an advantage of a SPECT MUGA?
Answer
  • accurate calculation of RVEF
  • more accurate wall motion assessment
  • better delineation of structures
  • LVEF value can be easily compared with planar methods

Question 18

Question
The stroke volume of the right ventricle is normally _____________ compared with the left ventricle.
Answer
  • lower
  • higher
  • the same
  • cannot be determined

Question 19

Question
A patient is having serial cardiac monitoring throughout their chemotherapy. The baseline LVEF was 67%, and after 2 rounds of chemo, their LVEF is 50%. The patient can be described as having:
Answer
  • no cardiotoxicity
  • mild caridiotoxicity
  • moderate cardiotoxicity
  • severe cardiotoxicity
  • cardiomyopathy

Question 20

Question
A patient with a bundle branch block will be expected to an abnormal ________ of the affected ventricle.
Answer
  • phase image
  • amplitude image
  • ventricle size
  • stroke volume
  • ejection fraction

Question 21

Question
Which cardiomyopathy may present with a small left ventricular cavity?
Answer
  • dilated
  • congestive
  • ischemic
  • hypertrophic
  • restrictive

Question 22

Question
If a photopenic halo around the entire cardiac blood pool appears on a patient's MUGA images, the patient most likely has:
Answer
  • a pericardial effusion
  • restrictive cardiomyopathy
  • low ejection fraction
  • congestive heart failure
  • valvular disease

Question 23

Question
Which of the following may cause a false negative stress MUGA result?
Answer
  • overly large region of interest over the left ventricle
  • left atrial enlargement
  • a resting ejection fraction of over 75%
  • the patient is over 60 years of age
  • inclusion of a bit of spleen in the background region of interest
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