Spi 2 Exam 4 Updated Actual Questions And Correct Answers

SPI 2 EXAM 4 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
Question:
1. You are using a tissue equivalent phantom. At a particular depth, reflections are no longer observed.
What are you evaluating?
Answer:
Sensitivity

Question:
2. Using a tissue equivalent phantom, two pins at depths of 2 cm and 10 cm are imaged. On the system
display, you measure the distance between the two reflections created by these pins. What are you
evaluating?
Answer:
Range calibration

Question:
3. The accuracy of placing reflections on an A-mode, B-mode, or M-mode in relation to the depth of
reflectors is called:
Answer:
Depth calibration

Question:
4. Using a tissue equivalent phantom, a sonographer adjusts the gain so that reflections on the display
change from fully bright to barely visible. What is the sonographer evaluating?
Answer:
Sensitivity

Question:
5. Which of the following phantoms can be used to evaluate performance Doppler systems?
Answer:
String phantom

Question:
6. Which of the following terms best describes the interval at which quality assurance evaluations
should be performed?
Answer:
Routinely

Question:
7. Which of the following phantoms has similar attenuation properties as that of soft tissue?
Answer:
Tissue equivalent

Question:
8. The region where no imaging can take place is called the:

, Answer:
Dead zone

Question:
9. Statistical Analysis is used to find out if the results of:
Answer:
Clinical testing is accurate

Question:
10. To perform statistical analysis, a Chi square is used. This incorporates:
Answer:
Comparison test vs gold standard

Question:
11. The term ""true positive"" means:
Answer:
The test said there was disease when there was

Question:
12. The following information is needed to find the positive predictive value:
Answer:
All of the positives

Question:
13. What statistical finding is defined as "the ability of a test to detect the absence of disease"?
Answer:
Specificity

Question:
14. What are two types of bioeffects?
Answer:
Thermal and Mechanical

Question:
15. What is an example of thermal bioeffects?
Answer:
Tissue heating above 2 degrees C

Question:
16. What is an example of mechanical bioeffects?
Answer:
Stable and transient cavitation

Question:
17. How are the best epidemiologic studies performed?
Answer:
Prospectively and randomized