LOGIQ S7 Advanced Reference Manual Rev 3 June 2016

Regulatory Requirement LOGIQ S7 Expert complies with regulatory requirements of the following European Directive 93/42/EEC concerning medical devices.

0459 This manual is a reference for the LOGIQ S7 Expert.

GE Healthcare P.O. Box 414, Milwaukee, Wisconsin 53201 U.S.A. (Asia, Pacific, Latin America, North America) GE Ultraschall Deutschland GmbH & Co. KG Beethovenstrasse 239 Postfach 11 05 60 D-42655 Solingen Germany TEL: 49 212.28.02.208; FAX: 49 212.28.02.431

Revision History Reason for Change REV

DATE

REASON FOR CHANGE

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2015/11/02 (YYYY/MM/DD)

Initial Release

Rev. 2

2016/05/17 (YYYY/MM/DD)

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Rev. 3

2016/06/08 (YYYY/MM/DD)

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Title Page

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Chapter 1

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Revision History

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Chapter 2

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Regulatory Requirements

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Chapter 3

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Please verify that you are using the latest revision of this document. Information pertaining to this document is maintained on ePDM (GE electronic Product Data Management). If you need to know the latest revision, contact your distributor, local GE Sales Representative or in the USA call the GE Ultrasound Clinical Answer Center at 1 800 682 5327 or 1 262 524 5698.

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

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LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Regulatory Requirements

Conformance Standards The following classifications are in accordance with the IEC/ EN 60601-1:6.8.1: •

According to 93/42/EEC Medical Device Directive, this is Class IIa Medical Device.

•

According to IEC/EN 60601-1, •

•

According to CISPR 11, •

•

Equipment is Class I, INTERNALLY POWERED ME EQUIPMENT, Type BF or CF Applied Parts. Equipment is Group 1, Class B (Class A with 6S-D) ISM Equipment.

According to IEC 60529, •

The footswitch rate IPx8 is suitable for use in surgical rooms.

•

Probe head (immersible portion) and cable are IPX7 Probe connector is not waterproof.

This product complies with the regulatory requirement of the following: •

Council Directive 93/42/EEC concerning medical devices: the CE label affixed to the product testifies compliance to the Directive. The location of the CE marking is shown in Chapter 2 of this manual. European registered place of business: GE Medical Systems Information Technologies GmbH Munzinger Strasse 5, D-79111 Freiburg, Germany Tel: +49 (0) 761 45 43 -0; Fax: +49 (0) 761 45 43 -233

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

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Conformance Standards (continued) •

•

International Electrotechnical Commission (IEC). •

IEC/EN 60601-1 Medical Electrical Equipment, Part 1 General Requirements for Safety.

•

IEC/EN 60601-1-1 Medical electrical equipment - Part 1-1: General requirements for safety - Collateral Standard: Safety requirements for medical electrical systems.

•

IEC/EN 60601-1-2 Medial electrical equipment - Part 1-2: General requirements for safety - Collateral Standard: Electromagnetic compatibility - requirements and tests.

•

IEC/EN 60601-1-4 Medical electrical equipment Part 1-4 General requirements for safety - Collateral Standard: programmable electrical medical systems.

•

IEC/EN 60601-1-6 Medical electrical equipment Part - 6 General requirements for basic safety and essential performance - Collateral Standard: Usability.

•

IEC/EN 60601-2-37 Medical electrical equipment - Part 2-37 : Particular requirements for the safety of ultrasonic medical diagnostic and monitoring equipment.

•

IEC/EN 62366 Application of usability engineering to medical devices.

•

IEC/EN 62304 Software Life Cycle Processes.

•

IEC/EN 62359 Ultrasonic - Field characterization - Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields.

International Organization of Standards (ISO) •

•

Underwriters’ Laboratories, Inc. (UL), an independent testing laboratory. •

•

UL 60601-1 Medical Electrical Equipment, Part 1 General Requirements for Safety.

Canadian Standards Association (CSA). •

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ISO 10993-1 Biological evaluation of medical devices Part 1 Evaluation and testing.

CAN/CSA-C22.2 No. 601.1-M90 Medical Electrical Equipment, Part 1 General Requirements for Safety.

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Conformance Standards (continued) •

•

NEMA/AIUM Acoustic Output Display Standard (NEMA UD-3). •

NEMA UD2 Acoustic output measurement standard for diagnostic ultrasound equipment.

•

NEMA UD3 Standard for real time display of thermal and mechanical acoustic output indices on diagnostic ultrasound equipment (MI, TIS, TIB, TIC).

Medical Device Good Manufacturing Practice Manual issued by the FDA (Food and Drug Administration, Department of Health, USA). •

CE Marked to Council Directive 93/42/EEC on Medical Devices Conforms to the following standards for safety : EMC Emissions Group 1 class A and Class B device requirements as per Sub clause 4.2 of CISPR 11.

•

WEEE (Waste Electrical and Electronic Equipment).

•

ROHS according to 2011/65/EU.

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Certifications •

General Electric Medical Systems is ISO 9001 and ISO 13485 certified.

Original Documentation •

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The original document was written in English.

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Table of Contents

Conformance Standards - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - i-3 Certifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - i-6 Original Documentation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - i-6

Table of Contents Chapter 1 - Acoustic Output Bioeffects Concerns Surrounding the Use of Diagnostic Ultrasound - - - - - - - - - - - 1-2 Measurement Precision and Uncertainty - - - - - - - - - - - - - - - - - - - - - - - 1-3

Acoustic Output Data Maximum output summary- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-4

Acoustic Output Probe Application - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-6 Table Key - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-8 C1-5-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-10 9L-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-18 11L-D Probe- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-26 ML6-15 Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-34 IC5-9-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-42 3CRF-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-50 L8-18i-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-58 S4-10-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-66 P2D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-76 P6D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-78 RAB4-8-D Probe- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-80 3Sp-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-88 8C Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-98 6S-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-106 6Tc-RS Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-116 10C-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-126 BE9CS Probe- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-134 L3-12-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-142 RIC5-9-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-150 S1-4-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-158 BE9CS-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-168 C1-6-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-176 C3-10-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-184 P8D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-192 S2-5-D Probe - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1-194

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Chapter 2 - System Formulas Measurement Abbreviations Cardiac measurement abbreviation list - - - - - - - - - - - - - - - - - - - - - - - - 2-2

Measurement Formulas Formulas–Generic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-14 Formulas–OB - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-17 Formulas–GYN - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-23 Formulas–Vascular - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-25 Formulas-Cardiac - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-26

DICOM SR Measurements Structured Reporting - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2-53

Chapter 3 - OB Tables OB Tables ASUM - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-2 Berkowitz - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-11 Bertagnoli - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-12 Brenner - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-13 Campbell - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-13 Chitty- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-14 Eriksen - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-20 Eik-Nes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-21 French College of Fetal Ultrasound (CFEF)- - - - - - - - - - - - - - - - - - - - 3-23 Goldstein - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-28 Hadlock - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-29 Hansmann - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-36 Hellman - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-45 Hill - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-45 Hohler - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-46 Jeanty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-46 JSUM - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-58 Kurtz - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-62 Mayden - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-63 Mercer - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-64 Merz - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-65 Moore - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-75 Nelson - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-75 Osaka - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-76 Paris - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-80 Rempen- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-83 Robinson - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-88 Tokyo - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-89 Tokyo Shinozuka - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-92 Williams - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-98 Yarkoni - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-98

Estimated Fetal Body Weight (EFBW) Hadlock - EFBW - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-99 Brenner - EFBW - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-99

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LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Williams - EFBW- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-100 Estimated Fetal Body Weight Tables - - - - - - - - - - - - - - - - - - - - - - - 3-101

What is the difference between "AUA" and "CUA"? AUA - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-104 CUA - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3-105 Variability between CUA and AUA - - - - - - - - - - - - - - - - - - - - - - - - - 3-106

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LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Chapter 1 Acoustic Output Provides Acoustic Output information and tables, as well as possible bioeffects and prudent use.

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

1-1

Acoustic Output

Bioeffects

Concerns Surrounding the Use of Diagnostic Ultrasound During a diagnostic ultrasound examination, high frequency sound penetrates and interacts with tissue in and around the area of anatomy to be imaged. Only a small portion of this sound energy is reflected back to the probe for use in constructing the image while the remainder is dissipated within the tissue. The interaction of sound energy with tissue at sufficiently high levels can produce biological effects (aka bioeffects) of either a mechanical or thermal nature. Although the generation of bioeffect is intentional with therapeutic ultrasound, it is generally undesired in diagnostic applications and may be harmful in some conditions. NOTE:

The American Institute of Ultrasound in Medicine (AIUM) has published a document entitled “Medical Ultrasound Safety”. This three part document covers Bioeffects and Biophysics, Prudent Use and Implementing ALARA. Ultrasound users should read the AIUM documents to become more familiar with Ultrasound safety. A copy of this document is included as part of the documentation package (Document 2163920-100). To contact the AIUM concerning their publications: •

In the USA, by telephone at 1-800-638-5352.

•

To write them, use the following address: AIUM 14750 Sweitzer Lane Suite 100 Laurel, MD, USA

1-2

20707-5906

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Bioeffects Measurement Precision and Uncertainty Precision and measurement uncertainty of the system used to measure the acoustic output is provided in the following table. These values are determined in accordance with Section 6.4 of the Standard for Real-Time Display of Thermal and Mechanical Acoustic Output Indices on Diagnostic Ultrasound Equipment, rev 2 AIUM/NEMA 2004, and the Acoustic Output Measurement Standard for Diagnostic Ultrasound Equipment, rev 3 NEMA 2004. Table 1-1:

Measurement Uncertainty

Measurement Precision and Uncertainty

Center Frequenc y

Acoustic Power

Peak Rarefaction al Pressure

Acousti c Intensity

± 1%

± 22%

± 11%

± 22%

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Thermal (external use) ± 1.12°C

Thermal (internal use) ± 0.98°C

1-3

Acoustic Output

Acoustic Output Data

Maximum output summary The following tables list the typical maximum acoustic output levels achievable with LOGIQ S7 Expert 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 overall maximum acoustic SPTA intensity for LOGIQ S7 Expert is limited to 720 mW/cm2 and MI is limited to 1.9. Modes for which TI does not exceed 0.1 are indicated by <0.1. The Summary tables show all of the probes’ operating modes. The following pages contain probe acoustic output tables for the noted probes. Table 1-2:

Summary Table

9L-D

ML6-15 RAB4-8-D S4-10-D C1-5-D 11L-D 3CRF-D IC5-9-D L8-18i-D P2D P6D 3Sp-D 8C 6S-D 6Tc-RS 10C-D BE9CS L3-12-D RIC5-9-D S1-4-D BE9CS-D C1-6-D C3-10-D P8D S2-5-D

Transducer Model

B-Mode

X

X X X X X X X X

X X X X X X X X X X X X

X

M-Mode (includes B-Mode, CM-Mode)

X

X X X X X X X X

X X X X X X X X X X X X

X

Color Flow (includes B-Mode)

X

X X X X X X X X

X X X X X X X X X X X X

X

Pulsed Doppler (includes B-Mode)

X

X X X X X X X X

X X X X X X X X X X X X

X

Operating Mode

Continuous Wave Mode

1-4

X

X X X

X X

X

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

X X

Acoustic Output Data Maximum Probe Temperature Table 1-3:

Maximum Probe Temperature (Degrees C)

Max Temp

Probe

Max Temp

Probe

With Phantom

In Air

With Phantom

In Air

9L-D

38.4

29.2

CF

3CRF-D

39.0

30.6

M

ML6-15

40.8

31.9

B

IC5-9-D

41.0

28.2

B

RAB4-8-D

41.7

32.8

M

L8-18i-D

41.9

33.0

PW

S4-10-D

38.0

29.0

B

P2D

34.5

25.1

CW

C1-5-D

42.1

33.9

B

P6D

34.0

24.3

CW

11L-D

35.9

26.4

B

3Sp-D

40.5

32.3

CF

8C

38.4

30.7

PW

6S-D

40.5

31.8

PW

6Tc-RS

40.7

33.2

CW

10C-D

41.8

33.5

M

BE9CS

35.6

28.6

B

L3-12-D

42.1

34.7

PW

RIC5-9-D

42.5

32.0

M

S1-4-D

40.4

32.4

CF

BE9CS-D

41.1

29.5

PW

C1-6-D

41.1

36.1

B

C3-10-D

41.3

33.2

B

P8D

37.4

28.6

CW

S2-5-D

42.2

47.3

PW

NOTE:

Mode

Mode

Lens temperature was measured under conditions per IEC 60601-2-37 and Amendment 1. 1. Thermocouple was placed at the geometric center of the lens. 2. a: Thermal phantom at 37 °C for non-external probes. b: Thermal phantom at 33 °C (or 23 °C) for external probes. (Temperature rise is measured and added to 33 °C if the phantom is at 23 °C). NOTE: Thermal phantom made with tissue-mimicking material as referenced in IEC 60601-2-37 Amd 1: Annex II.2 3. Probe placed upright in contact with above thermal phantom. 4. Auto-freeze capability is disabled. 5. Lens temperature is monitored for 30 minutes. 6. a: Measurement uncertainty for probes with temperature sensor: 0.3°C. b: Measurement uncertainty and probe variation for other probes: 2°C.

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

1-5

Acoustic Output

Acoustic Output

Probe Application Table 1-4:

1-6

Probe Application

Probe

Application

C1-5-D

Abdomen, Vascular, OB/GYN, Urology

9L-D

Abdomen, Small Parts, Vascular, Pediatric

11L-D

Small Parts, Vascular, Pediatric, Neonatal

ML6-15

Small Parts, Vascular, Pediatric, Neonatal

IC5-9-D

OB/GYN, Urology, Transvaginal, Transrectal

3CRF-D

Abdomen, OB/GYN, Urology

L8-18i-D

Small Pars, Vascular, Neonatal, Pediatrics

S4-10-D

Pediatrics, Neonatal, Abdomen

P2D

Cardiac, Vascular

P6D

Cardiac, Vascular

RAB4-8-D

Abdomen, OB/GYN, Urology

3Sp-D

Cardiac, Abdomen, Transcranial

8C

Pediatrics, Neonatal

6S-D

Cardiac, Pediatrics, Neonatal

6Tc-RS

Cardiac (Transesophageal)

10C-D

Pediatrics, Neonatal, Vascular (No transcranial)

BE9CS

Urology (Transrectal)

L3-12-D

Abdomen, Vascular (No transcranial), Small Parts, Pediatric, Neonatal

RIC5-9-D

OB/GYN (Transvaginal), Urology (Transrectal)

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

Acoustic Output Table 1-4:

Probe Application

Probe

Application

S1-4-D

Cardiac, Transcranial

BE9CS-D

Urology(Transrectal), OB/GYN

C1-6-D

Abdomen, OB/GYN, Vascular, Urology

C3-10-D

Pediatric, Neonatal, Vascular

P8D

Cardiac, Vascular

S2-5-D

Cardiac, Transcranial, Abdomen

LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3

1-7

Acoustic Output Table Key

Table 1-5: FDA

IEC

Table Key

Meaning-IEC 60601-2-37 / FDA & NEMA UD2, UD3

a

α

Acoustic Attenuation Coefficient / Derating factor (usually 0.3 dB/cm-MHz)

Aaprt

Aarpt

-12db Output Beam Area / Active aperture area

CMI

Normalizing Coefficient

Deq

Deq

Equivalent Aperture Diameter / (same)

d-6

d-6

Pulse Beam Width / Beam diameter at –6 dB

deq

deq

Equivalent Beam Diameter

fc

ƒawf

Acoustic Working Frequency / Center frequency

Ipa

Ipa

Pulse-Average Intensity

Ipa.3

Ipa,α

Attenuated Pulse-Average Intensity

PII

Ipi

Pulse-Intensity Integral

PII.3

Ipi,α

Attenuated Pulse-Intensity Integral

ITA

Ita(z)

Temporal-Average Intensity

ITA.3(Z)

Ita,α(z)

Attenuated Temporal-Average Intensity / (at depth z)

ISPTA(Z)

Izpta(z)

Spatial-Peak Temporal-Average Intensity

ISPTA.3(Z)

Izpta,α(z)

Attenuated Spatial-Peak Temporal-Average Intensity

MI

MI

Mechanical Index

Wo

P

Output Power / Time average acoustic power at the source

W.3(Z)

Pα

Attenuated Output Power / Time average acoustic power derated to depth z

Wo1

P1

Bounded Output Power / Power emitted from the central 1cm of aperture

PII

pi

Pulse Pressure Squared Integral / Pulse intensity integral

pr

pr

Peak-Rarefactional Acoustic Pressure / (same)

pr.3

pr α

Attenuated Peak-Rarefactional Acoustic Pressure / (same)

PRF

prr

Pulse Repetition Rate / Pulse repetition frequency

TI

TI

Thermal Index / (same)

TIB

TIB

Bone Thermal Index / (same)

TIC

TIC

Cranial-Bone Thermal Index / (same)

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LOGIQ S7 Expert – Advanced Reference Manual 5717809-100 English Rev. 3