GE Logiq 3 Instruction Manual

Bioeffects
LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual 1-15
Direction 5122542-100 Rev. 2
Suggested Guiedlines(cont’d)
Methodology:
Doppler studies on the umbilical  arteries are carried out after 
manual palpation of the uterus  and fetus. In pregnancies before 
28 weeks, the fetus cannot be  easily felt hencethe probe is 
placed on the upper third of the ut erus at the midline. The probe 
is gently rotated until the umbilic al signal is heard and clearly 
identified on the screen. Ther...

Acoustic Output
1-16LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual
Direction 5122542-100 Rev. 2
FDA Acoustic Output Data
Maximum Output Summary
The following tables list the typical maximum acoustic output 
levels achievable with LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 
for all probes and operational modes. It is intended that this is 
information be useful in making ALARA decisions and selecting 
the most appropriate probe for the application. In accordance 
with US FDA Guidelines, the ov erall...

FDA Acoustic Output Data
LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual 1-17
Direction 5122542-100 Rev. 2
Maximum Probe Temperature
Table 1-3: Summary Table  (Continued)
Operating Mode12L3S7S
B-Mode XXX
M-Mode (including
B-Mode) XXX
Color Flow XXX
M Color Flow XXX
Pulsed Doppler 
(including
B-Mode) XXX
Continuous Wave (CW) 
Doppler XX
Table 1-4: Maximum Probe Temperature
Probe
Max 
Te m p
Probe
Max 
Te m p
Probe
Max 
Te m p
Probe
Max 
Te m p
3C 29.64 E8C 28.11 3S 25.59
3.5C 30.70 8L 37.95...

Acoustic Output
1-18LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual
Direction 5122542-100 Rev. 2
Acoustic Output
Ta b l e  K e y
Table 1-5:  Table Key
FDAIECMeaning—IEC 60601-2-37 / FDA & NEMA UD2, UD3
aαAcoustic Attenuation Coefficient  / Derating factor (usually 0.3 dB/cm-MHz)
A
aprtAarpt-12db Output Beam Area  / Active aperture area
C
MINormalizing Coefficient
D
eqDeqEquivalent Aperture Diameter  / (same)
d
-6d-6Pulse Beam Width  / Beam diameter at –6 dB
d
eqdeqEquivalent Beam Diameter
f...

Acoustic Output
LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual 1-19
Direction 5122542-100 Rev. 2
pr.3pr αAttenuated Peak-Rarefactional Acoustic Pressure  / (same)
PRF prrPulse Repetition Rate  / Pulse repetition frequency
TI TIThermal Index / (same)
TIB TIBBone Thermal Index  / (same)
TIC TICCranial-Bone Thermal Index  / (same)
TIS TISSoft-Tissue Thermal Index  / (same)
PD t
dPulse Duration / (same)
x
-12,y-12X, Y -12 dB Output Beam Dimensions / (same)
Z ZDistance from the Source to a...

Acoustic Output
1-20LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual
Direction 5122542-100 Rev. 2
Probe Name:3C
Table 1-6:  Transducer Mode 3C Operating Mode: B Mode
Index LabelMI
TISTIB
TIC
scannon-scannon-
scan
Aaprt1
Global Maximum: Index Value 0.9
IECFDAUnits
pra pr.3 (MPa) 1.5
PWo (mW)
min of [Pα(zs, Ita, α(zs)] [(W.3(Z1),ITA . 3(z1)])
zs z1(cm)
zbp zbp(cm)
zb zsp(cm) 1.1
z  at max. I pi,α zsp(cm)
deq(zb) deq(zsp) (cm)
ƒawffc(MHz) 3.4 3.43.4
Dim of A
aprtX(cm)3.63.6
Y(cm)
1.031.03
t
dPD...

Acoustic Output
LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual 1-21
Direction 5122542-100 Rev. 2 Table 1-7:  Transducer Mode 3C
 Operating Mode: M Mode (Inc. B-Mode)
Index LabelMI
TISTIB
TIC
scannon-scannon-
scan
Aaprt1
Global Maximum: Index Value 0.850.7 0.3
IECFDAUnits
pra pr.3 (MPa) 1.51
PWo (mW)31.0 21.0
min of [P
α( zs, Ita, α(zs)] [(W.3(Z1),ITA . 3(z1)])
zs z1(cm)
zbp zbp(cm)
zb zsp(cm) 1.43.1
z  at max. I pi,α zsp(cm)
deq(zb) deq(zsp) (cm)0.3
ƒawffc(MHz) 3.4 3.43.4 3.4
Dim of A...

Acoustic Output
1-22LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual
Direction 5122542-100 Rev. 2
Table 1-8:  Transducer Mode 3C Operating Mode: Color Flow Mode (Inc. M-Mode)
Index LabelMI
TISTIB
TIC
scannon-scannon-
scan
Aaprt1
Global Maximum: Index Value 0.84 3.22.9 4.6
IECFDAUnits
pra pr. 3 (MPa) 1.55
PWo (mW)270.1179.7 270.1
min of [P
α( zs, Ita, α(zs)] [(W.3(Z1),ITA . 3(z1)])
zs z1(cm)
zbp zbp(cm)
zb zsp(cm) 3.963.3
z  at max. I pi,α zsp(cm)
deq(zb) deq(zsp) (cm)0.4
ƒawffc(MHz) 2.5...

Acoustic Output
LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual 1-23
Direction 5122542-100 Rev. 2 Table 1-9:  Transducer Mode: 
3C Operating Mode: Pulsed Doppler (inc. B-Mode)
Index LabelMI
TISTIB
TIC
scannon-scannon-
scan
Aaprt1
Global Maximum: Index Value 0.7 0.50.9 0.6
IECFDAUnits
pra pr.3 (MPa) 1.0
PWo (mW)42.679.7 42.6
min of [P
α( zs, Ita, α(zs)] [(W.3(Z1),ITA . 3(z1)])
zs z1(cm)
zbp zbp(cm)
zb zsp(cm) 5.087.7
z  at max. I pi,α zsp(cm)
deq(zb) deq(zsp) (cm)1.0
ƒawffc(MHz) 3.3 3.33.5...

Acoustic Output
1-24LOGIQ 3 Expert/LOGIQ 3 Pro/LOGIQ 3 Advanced Reference Manual
Direction 5122542-100 Rev. 2
Probe Name:3.5C
Table 1-10:  Transducer Mode __3.5C____ Operating Mode: B Mode
Index LabelMI
TISTIB
TIC
scannon-scannon-
scan
Aaprt1
Global Maximum: Index Value 0.52.1
IECFDAUnits
pra pr.3 (MPa) 1.54
PWo (mW)147.0
min of [P
α( zs, Ita, α(zs)] [(W.3(Z1),ITA . 3(z1)])
zs z1(cm)
zbp zbp(cm)
zb zsp(cm) 1.0
z  at max. I pi,α zsp(cm)
deq(zb) deq(zsp) (cm)
ƒawffc(MHz) 3.042.8
Dim of A
aprtX(cm)1.8...