Giga

10⁹ = 1,000,000,000

Mega

10⁶ = 1,000,000

kilo

10³ = 1,000

hecto

10² = 100

deca

10¹ = 10

deci

10^-1 = 0.1

centi

10^-2 = 0.01

milli

10^-3 = 0.001

micro

10^-6 = 0.000001

nano

10^-9 = 0.000000001

Pulse Repetition Period

(the time to transmit and recieve an acoustic line of data)

The time required to build up a frame =

the time per acoustic line multiplied by the total number of lines in the frame

Operating or transmit frequency of a transducer

(for diagnostic ultrasound 2-12 MHz common)

Pulse Repetition Frequency =

1/PRP (typically less than 10 kHz)

The reciprocal of the frame time

(typically less than 100 Hz)