Socrative Quiz 1 Review Flashcards
List three reasons that outline the importance of a quality assurance program.
- Proper equipment operation
- Detection of gradual degradation of performance
- Minimizes machine down time
- Minimizes repeat examinations (misdiagnosis)
- Sonographer and patient safety
- Cost efficiency
- Maintains standards
Of the following who is the “front line” person in a quality assurance program?
- The physician
- The sonographer
- The bio-medical personal
- The manufacturer
The physician
What is the minimum recommendation for performance testing?
- Daily
- Weekly
- Monthly
- Yearly
Yearly
An AIUM test object can assess a systems sensitivity? True or False
False
Which of the following factors influence a systems axial resolution
- The beam width
- The frequency used
- The spatial pulse length
- The depth from the traduces face
- The frequency used
- The spatial pulse length
Describe how one would test for lateral resolution using a tissue equivalent phantom
Use the lateral resolution pins and look for lateral resolution artifacts like Point spreading.
We are looking for the lowest resolution
Assessing elevation resolution by comparing resolved cystic structures in a tissue equivalent phantom over time is a subjective measure of evaluation? T/F
False
The vertical pin group can be used to assess more than one system function? T/F
True
Which doppler phantom will allow the testing of image congruency? Image congruency: making sure that the colour doppler is in the right area
Flow or TE tissue equivalent doppler phantom
Describe the hydrophone
Small transducer that produces a voltage proportional to the received acoustic pressure wave, When used with a plotter it can be moved throughout the sound field to produce a beam profile
Which of the following can the hydrophone measure when it is used with a spectrum analyzer?
- Resonant frequency
- Bandwidth
- Fractional bandwidth
- Q Factor
The answer is all of them because they are all related to each other.
What artifact is avoided by the offset nature of the axial resolution pins in a tissue equivalent phantom?
Reverberation but specifically comet tail
Describe the appearance of two pins used to assess axial resolution that are 1mm apart, when the system produces pulses with an spatial pulse length of 1mm
They will appear 1 mm apart
What is the disadvantage of the doppler flow phantom compared to the string phantom?
Cost, and maintenance
