DGH TECHNOLOGY SCANMATE FLEX - Page 52

52
Mode / Model: B-Mode: 12.5 MHz (B-Scan)
DGH1912
B-Mode: 20 MHz (B-Scan)
DGH1920
A-Mode: 10 MHz (A-Scan)
DGH6006
MI
(Unitless)
I
SPTA.3
(mW/cm
2
)
MI
(Unitless)
I
SPTA.3
(mW/cm
2
)
MI
(Unitless)
I
SPTA.3
(mW/cm
2
)
Sample Size 3.00 3.00 3.00 3.00 5.00 5.00
K 4.258 4.258 4.258 4.258 2.742 2.742
Mean (x) 0.149 0.105 0.169 0.155 0.133 0.522
StdDev (Sx) 0.0154 0.0260 5.20E-3 7.24E-3 3.24E-3 0.0258
Limit (X) 0.215 0.216 0.191 0.185 0.142 0.593
Mode / Model: B-Mode: 35 MHz (UBM)
DGH1500-35
B-Mode: 50 MHz (UBM)
DGH1500-50
MI
(Unitless)
I
SPTA.3
(mW/cm
2
)
MI
(Unitless)
I
SPTA.3
(mW/cm
2
)
Sample Size 3.00 3.00 3.00 3.00
K 4.258 4.258 4.258 4.258
Mean (x) 0.177 0.0799 0.113 0.0262
StdDev (Sx) 3.61E-3 0.0116 8.72E-3 3.50E-3
Limit (X) 0.192 0.129 0.150 0.0411
ULTRASONIC EMMISSIONS INFORMATION
The following Acousc Output Reporng Tables show the average outputs of the samples
tested. These results include the pressure-me waveform, the Fourier transform, the pulse in-
tensity integral and the waveform analysis taken at the derated spaal peak locaon (z
mjPII.3
).
The Stascal Analysis of Measurement Data tables show the results of a stascal analysis was
performed on the data to examine the upper output limits, based on a one-sided tolerance limit
approach. The mean and standard deviaon of the Spaal-Peak, Time-Average Intensity and
Mechanical Index were found, and the upper output limits were calculated from the following
formula:
_____
X = x + K*Sx
__
where X is the upper output parameter limit, x is the average of the measured output
parameter, Sx is the standard deviaon of the measured output parameter, and K is a factor
from Reference 11, Table A-7 (of M.G.Natrella, Experimental Stascs, NBS Handbook 91, Octo-
ber 1963). A value of K was chosen which corresponds to a 90% probability that 90% of all
probes would fall below the calculated limits X. Table notaon denions listed below:
MI Mechanical Index Z at max. I
pi.α
derated spaal peak locaon
TIS So Tissue Thermal Index I
spta.3
derated spaal-peak pulse-average intensity
TIB Bone Thermal Index A
aprt
Acve aperture area
TIC Cranial Bone Thermal Index F
c
center frequency (in MHz).
P output power (in mW) p
r
peak rarefaconal pressure (in MPa)
T
d
pulse duraon F
awf
acousc working frequenc (in MHz)
I
pi.α
derated pulse intensity integral
STATISTICAL ANALYSIS OF MEASURMENT DATA