The Second Question for the competition

Q: Mention 3 types of ultrasound transducers

Write the answer in the comments and remember to answer the last upcoming question.

HINT about the event:
Under the Patronage of His Excellancy
Prof. Khaled Abd El Khaffar
Minister of Health and Population
The 2nd #Egyptian_International_Radiology_Conference of Ministry of Health & Population “MOHP”
Organized by
General Department of Radiology ’GDR’
In partnership with
Egyptian Society of Radiology & Nuclear Medicine ’ESRNM’
1-2-3 November, 2023
Cairo, Egypt