US QA Flashcards
1
Q
What is the relevant IPEM report for USQA?
A
IPEM 102
2
Q
What is a TETO?
A
Tissue Equivalent Test Object
3
Q
How do you do in-air reverb test?
A
Min focus
Max gain
Measure to last reverb that stretches across central third of image.
4
Q
How do you do in-air B-mode noise test?
A
Reduce TGCs to min over reverb
Maximum gain, then reduce until noise appears in distal part of image.
Record gain
5
Q
Equation for ISB_60?
A
ISB_60=(vmax-vmin)/(vmax+vmin)*100%
6
Q
What are 3 benefits of OTTO over TETO for calliper accuracy measurements?
A
1) no compression
2) correct speed of sound
3) TETO degrades
7
Q
How fast is the shear wave in shear wave elastography?
A
1 - 10 m/s
8
Q
How is the shear wave velocity related to the elastic modulus in shear wave elastography?
A
v_s=sqrt(G/rho)
