Cornell
HM-POCUS

Hospital Medicine Point of Care Ultrasonography

Question 1: Which of the following statements regarding the physics of 2D ultrasound is TRUE:

SONAR, 1st used during WWI, stands for Slow-Output Non-ionizing Airwave Radiation
Piezo-electric effect, which is a conversion of the energy of mechanical deformation into an electrical pulse, is named after a manufacturer of lighters during WWI, who were the 1st to incorporate the crystals into their products
Ultrasound imaging physics is based on a longitudinal wave that does not require a medium to travel
Appearance of structures on ultrasound is based on the change in the speed of sound as it enters those structures

Question 2: On lung ultrasound, A-Lines are generated based on violation of which of the following assumptions of ultrasound?

Sound travels in a straight line
Sound speed is uniform
Emitted signals return to the probe only once
Signals are emitted only from the main beam

Question 3: What is shown in the picture below?

Anechoic
Isoechoic
Hyperechoic
Hypoechoic