Question

extracorporeal shockwave lithotripsy uses ______ to treat kidney stones.
a x - rays
b ultrasound
c radio waves
d surgery

Explanation:

Extracorporeal shockwave lithotripsy (ESWL) is a non - invasive procedure. It uses shockwaves (which are a form of ultrasound in this context). X - rays are mainly used for imaging (e.g., in X - ray radiography to locate stones, but not the energy source for breaking them in ESWL). Radio waves have different applications (e.g., in communication, MRI has radiofrequency components but not for lithotripsy). Surgery is an invasive method (e.g., percutaneous nephrolithotomy is a surgical procedure for kidney stones, but ESWL is non - invasive).

Answer:

B. ultrasound