PadScan HD 2
Caresono Technology Co., Ltd
36
dimensions
b
beam (-6dB pulse beam width) in a specified direction normal to the beam
alignment axis and at the transducer output face. In scanning modes, these
shall refer to the center scan line only.
Fawf
MHz The Arithmetic-mean Acoustic Working Frequency is the arithmetic
mean of the frequencies f1 and f2 at which the amplitude of the
spectrum of the acoustic signal first becomes 3dB lower than the
peak amplitude.
APF
c
%
Acoustic Power-up Fraction is the ratio of the peak rarefactional
acoustic pressure when the system is in Power-up mode to the
maximum value of the peak rarefactional acoustic pressure for any
system settings of a specified mode of operation. This ratio is
determined from measurements made at the position which yields
the maximum pulse-pressure-squared integral (or maximum mean
square acoustic pressure for CW)
AIF
d
%
Acoustic Power-up Fraction is the ratio of the peak rarefactional
acoustic pressure when the system is in Initialization mode to the
maximum value of the peak rarefactional acoustic pressure for any
system settings of a specified mode of operation. This ratio is
determined from measurements made at the position which yields
the maximum pulse-pressure-squared integral (or maximum mean square
acoustic pressure for CW)
Maximum
power
e
mW
This is the Maximum Temporal Average power output. For
scanningmodes, this shall be the total power output of all the acoustic
pulses.
Iob
mW/
cm²
Output Beam Intensity is the temporal-average power output divided by the
output beam area
Power-up
mode
With the probe connected cycle power on the system. Write down
the mode to which the system powers up. Usually, it is “B” mode.
Initialization
mode
Write down “N/
A
f
“ where it denotes “system settings do not change
on new patient entry”
Acoustic
output
freeze
Write down “YES “ if the system is supplied with an output freeze
facility.
I
tt
mm
Transducer to Transducer output face distance is the distance along the
beam alignment axis between the surface containing the active face of the
transducer or elements and the transducer output face (usually the lens
thickness)
I
ts
mm
Transducer Standoff distance is the shortest distance between the
transducer output face and the patient entry plane. The term
“contact” is used to connate direct contact between the transducer
output face and the patient.
