ARDMS SPI STUDY GUIDE (Ultrasound Physics Certification Test Study |QUESTIONS & ANSWERS |VERIFIED & UPDATED | 2024

soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... - Answer Remain the Same because stiffness and density affect Propagation Speed. What is the audible range? - Answer 20-20,000Hz >20,000Hz=Ultrasound Frequency is measured in - Answer Hertz (Hz) is Cycles per Second Not affected by sonographer Increase Frequency; Decrease Depth A period is the length of time it takes for - Answer one complete wavelength to pass a fixed point PRP is determined by - Answer Transmit time and receive time. Period is measured in - Answer Time (μs) When the sonographer changes the imaging depth what parameters are changed? - Answer PRP, PRF, Duty Factor What is duty factor? - Answer The percentage or fraction of time that the system is transmitting a pulse (Time Sound is ON or ON-Time).