SonoScape S6 Service manual
S6
Portable Digital Color Doppler Ultrasound System
Service Manual
May 5, 2010
S6 Portable Digital Color Doppler Ultrasound System
Service Manual
P/N: 4720-0034-01A
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S6 Portable Digital Color Doppler Ultrasound System
Service Manual
Contents
1 Introduction 1-1
1.1 Intended Users . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.2 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1.3 Software Updates . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2 Safety Considerations 2-1
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.2 Symbol Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.3 Electrical Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.4 Mechanical Safety . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2.5 Human Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
3 Description of the System 3-1
3.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . 3-1
3.2 System Configuration . . . . . . . . . . . . . . . . . . . . . . . 3-2
3.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3.4 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.5 Combined Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
3.6 Scanning Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.7 Adjustable Parameters . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.7.1 B Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
3.7.2 Spectral Doppler (PW/CW) . . . . . . . . . . . . . . . 3-7
3.7.3 Color Doppler and Power Doppler . . . . . . . . . . . 3-7
3.7.4 Archive and Backup . . . . . . . . . . . . . . . . . . . . 3-8
3.8 Measurements and Calculations . . . . . . . . . . . . . . . . . 3-8
4 Principle of the S6 System 4-1
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
4.2 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . 4-1
4.3 Principle of Probes . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.4 Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
4.5 Functional Boards/Units of the S6 System . . . . . . . . . . . 4-3
4.5.1 Functional Block Diagram . . . . . . . . . . . . . . . . 4-4
4.5.2 Explanations of the System Functions . . . . . . . . . 4-4
4.6 Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
5 S6 Disassembly Instructions 5-1
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5.1 Bottom Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
5.2 Back Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
5.3 Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
5.4 KEAA board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5.5 HDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
5.6 Voltage Conversion Board . . . . . . . . . . . . . . . . . . . . . 5-10
5.7 Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
5.8 MPC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
5.9 Ultrasound Module Assembly . . . . . . . . . . . . . . . . . . . 5-12
5.9.1 Ultrasound Metal Shield . . . . . . . . . . . . . . . . . 5-13
5.9.2 Ultrasound Module . . . . . . . . . . . . . . . . . . . . 5-14
5.10 Power Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-16
5.11 Keyboard Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
5.12 LCD assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18
6 Wiring Instructions 6-1
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
6.2 Wiring in the System Level . . . . . . . . . . . . . . . . . . . . 6-2
6.3 Detailed Connection Instructions . . . . . . . . . . . . . . . . 6-4
6.3.1 Control Cable for Keyboard Unit (3520-0501) . . . . 6-4
6.3.2 Connection wires for keyboard small board (3520-
0502) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
6.3.3 Connection wires for trackball (3520-0503) . . . . . 6-4
6.3.4 Connection cable for loud speakers (3520-0504) . . . 6-5
6.3.5 Signal Transmission cable for keyboard (3520-0505) 6-5
6.3.6 SATA cable for HDD (3520-0506) . . . . . . . . . . . . 6-6
6.3.7 LVDS Signal Cable (3520-0507) . . . . . . . . . . . . . 6-6
6.3.8 Cables Connecting Keyboard and motherboard (3520-
0508) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
6.3.9 Connection wires for system fan(3520-0509) . . . . . 6-7
6.3.10 DBF USB Signal Cable (3520-0510) . . . . . . . . . . 6-7
6.3.11 USB Cable for µ-Scan Dongle(3520-0511) . . . . . . 6-8
6.3.12 Power Supply Cable for Voltage Inversion Board (3520-
0512) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
6.3.13 ECG internal connection cable (3520-0513) . . . . . 6-9
6.3.14 Foot Switch Cable (3520-0514) . . . . . . . . . . . . . 6-9
6.3.15 Composite Video BNC Cable (3520-0515) . . . . . . . 6-9
6.3.16 Main power cables from SMPS (3520-0520) . . . . . 6-10
7 Install and Update the System Software 7-1
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7.2 Applicable Models . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
7.3 Update Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
7.4 Non-kernel Level Update Instructions . . . . . . . . . . . . . . 7-3
7.4.1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
7.4.2 Non-kernel Level Software Update Procedures . . . . 7-4
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7.5 Upgrade Kernel and Software . . . . . . . . . . . . . . . . . . 7-5
7.5.1 Upgrade Using USB Boot-up Disk . . . . . . . . . . . . 7-5
7.5.2 Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
7.5.3 Upgrade Procedures . . . . . . . . . . . . . . . . . . . . 7-5
7.5.4 Activate the Micro-SCAN function . . . . . . . . . . . 7-10
8 System Functionality Tests 8-1
8.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.2 Testing Software . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
8.2.1 Speaker Test . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.2 System memory . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.3 TFC test . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.4 EC↔FIFO . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.5 Receive bus . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.6 Detector to FIFO . . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.7 ADC Test (Rx on) . . . . . . . . . . . . . . . . . . . . . 8-2
8.2.8 Probe ID, HV and Temp . . . . . . . . . . . . . . . . . . 8-3
8.2.9 ADC Test (Rx off) . . . . . . . . . . . . . . . . . . . . . 8-3
8.2.10 Receive Channel Test . . . . . . . . . . . . . . . . . . . 8-3
8.2.11 Single Element Test . . . . . . . . . . . . . . . . . . . . 8-3
8.3 Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
8.3.1 Run Test 8.2.1 (Speaker Test) . . . . . . . . . . . . . . 8-4
8.3.2 Run Tests from 8.2.2 and 8.2.9 . . . . . . . . . . . . . 8-5
8.3.3 Run Tests from 8.2.10 to 8.2.11 . . . . . . . . . . . . . 8-5
8.4 Key Simulation Test . . . . . . . . . . . . . . . . . . . . . . . . 8-6
8.5 Real-time Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6
9 Supported Peripherals 9-1
9.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
9.2 Thermal Printer Installation . . . . . . . . . . . . . . . . . . . 9-1
9.3 Network Printer Installation . . . . . . . . . . . . . . . . . . . 9-2
9.3.1 Supported Models (Not Exhaustive) . . . . . . . . . . 9-2
9.3.2 Configurations . . . . . . . . . . . . . . . . . . . . . . . 9-2
9.3.3 Network Connection with PC . . . . . . . . . . . . . . 9-7
10 System Troubleshooting 10-1
10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
10.2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
10.3 Functional Check . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
10.3.1 Basic Functional Tests . . . . . . . . . . . . . . . . . . . 10-2
10.3.2 Functional Test for Critical Parts . . . . . . . . . . . . 10-3
10.4 Common Problems and Service Instructions . . . . . . . . . . 10-4
10.4.1 Repairing Procedures . . . . . . . . . . . . . . . . . . . 10-5
10.4.2 Problem Analysis . . . . . . . . . . . . . . . . . . . . . 10-6
11 System Maintenance 11-1
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11.1 Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
11.2 Host Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
11.3 Probe Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 11-3
11.4 Cleaning and Disinfecting Probes . . . . . . . . . . . . . . . . 11-4
11.4.1 Cleaning Probes . . . . . . . . . . . . . . . . . . . . . . 11-4
11.4.2 Disinfecting Probes . . . . . . . . . . . . . . . . . . . . 11-4
A Make a Bootable USB Key A-1
A.1 Make bootable key directly through PC . . . . . . . . . . . . . A-1
B Cables & Wires Inside the System B-1
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Chapter 1
Introduction
This manual describes the information for servicing and maintaining of
the S6 Portable Digital Color Doppler Ultrasound System. Please read the
Service Manual carefully before servicing/maintaining the equipment. Pay
special attention to chapter 2 which is on safety issues.
1.1 Intended Users
The intended users of this manual are the Service Engineers trained and
authorized by SonoScape Co., Ltd.
Warning!
Only Service Engineers trained and authorized by
SonoScape can perform service and repairs for the equipment.
1.2 Contact Information
SonoScape values the customer’s feedback, please feel free to contact us.
Contact Information:
Address: 4/F., Yizhe Building, Yuquan Road, Shenzhen,
P.R. China
Zip Code: 518051
Tel: 400–678–8019
Fax: 86–755–26722850
Website: http://www.sonoscape.com
E-mail: service@sonoscape.net
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1.3 Software Updates
SonoScape may provide software updates to enhance the performance of
the system. The Service Manual will be updated accordingly, please contact
our service department to get the latest edition.
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Chapter 2
Safety Considerations
2.1 Introduction
This chapter describes the safety precautions that must be observed during all phases of operation, service and repair of the equipment. For human safety, please read this chapter carefully before using or servicing the
equipment.
Warning!
Please pay due attention to the items with this warning icon.
Dismissing these warnings may cause serious personal injury
or even endanger human life.
Attention!
The items with this caution icon describe the precautions
necessary to protect the system. Failure to observe these
precautions may cause system damage.
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2.2 Symbol Used
SSI-8000 Mobile Digital Color Doppler Ultrasound System
Service Manual
Off (Mains power switch OFF)
SSI-8000 Mobile Digital Color Doppler Ultrasound System
Service Manual
Off (Mains power switch OFF)
On (Mains power switch ON)
SSI-8000 Mobile Digital Color Doppler Ultrasound System
Service Manual
Off (Mains power switch OFF)
On (Mains power switch ON)
Protective earth/ground connection.
SSI-8000 Mobile Digital Color Doppler Ultrasound System
Service Manual
Off (Mains power switch OFF)
On (Mains power switch ON)
Protective earth/ground connection.
Potential equilibrium connection
SSI-8000 Mobile Digital Color Doppler Ultrasound System
Service Manual
Off (Mains power switch OFF)
On (Mains power switch ON)
Protective earth/ground connection.
Potential equilibrium connection
AC
S6 Portable Digital Color Doppler Ultrasound System
Service Manual
Symbol
Description
Insulated patient application part (Type BF)
Dangerous electric voltage
Warning! Follow these instructions to avoid personal injury or system
damage.
Attention! Follow these instructions to avoid system damage.
Off (Mains power switch OFF)
On (Mains power switch ON)
Protective earth/ground connection.
Potential equilibrium connection
AC
Table 2.1: Table of Symbols
These symbols (icons) listed in table 2.1 are used with the equipment
and/or within this manual. They serve as warnings, or for marking connections and etc.
2.3 Electrical Safety
• The equipment conforms with the following regulations for electrical
safety,
– IEC 60601-1: 1988+A1:1991+A2:1995, Medical Electrical Equip-
ment Part 1: General Requirements For Safety, Class I, BF, continuous operation
– IEC 60601-2-37: 2001 + A1:2004 + A2:2005, Medical Electri-
cal Equipment Part 2-37: Particular Requirements For The Safety
Of Ultrasonic Medical Diagnostic And Monitoring Equipment
• The equipment conforms with the following EMC/EMI standards:
IEC60601-1-2: 2001+A1: 2004, Class A (CE)
• Degrees of protection against harmful liquid: IPX0 for the S6 system
and IPX7 for the accompanying probes.
Please comply with the following rules for safety considerations:
• Properly grounding the system can prevent potential electric shock,
ensure that the three-conductor AC power cord equipped with the
system is plugged into an electrical outlet/receptacle marked with
hospital grade. The equipment has an extra grounding point (located
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at the lower rear panel). To avoid loss of image quality, it is compulsory to connect this point to ground (earth).
• Potentially hazardous electrical voltage exists inside the equipment.
Unauthorized personnel DONOT attempt to open the cover of the
equipment.
• The equipment must not be used in the presence of inflammable gases
(e.g. anesthetic gases and nitrous oxide) to avoid explosion hazard.
• Devices must be powered from a receptacle marked "hospital grade"
before being connected to the system directly. In case "hospital grade"
receptacles are not available, use isolation transformers instead.
Warning!
Electrostatic discharge (ESD) may cause electric shock or
damage the equipment. Observe the following precautions:
1. Prior to repairing or cleaning the equipment, ensure
that the system has been turned off and the power cable unplugged.
2. The equipment must be grounded correctly during operation. Use anti-ESD spray on the ground if possible.
• The leakage current of the entire system including all auxiliary equipments must not exceed the limit as stated in IEC 60601-1.
• The equipment may interfere with or be interfered by other high frequency devices (e.g. medical lasers). Extra safety measures must be
taken if other HF devices have to be used nearby.
• Use the couplant shipped with the equipment or any other couplant
recommended by SonoScape. Use any unrecommended couplant
may damage the probe and void the warranty.
2.4 Mechanical Safety
1. Prior to using the equipment, place it horizontally and lock the wheels.
2. Take care when moving the equipment. Failure to follow the precautions listed below could result in injury, uncontrolled motion and
costly damage.
∗ Take the following precautions before transporting the system:
1) Ensure that the system is powered off and with power cable unplugged.
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2) Disconnect all the probes from the system and place them in
their carrying case.
3) Ensure that all the peripherals and auxiliary devices have been
disconnected from the system.
4) If you are moving the docking cart together with the S6 system,
unlock the wheels.
5) Now you can hold the handle and push the system to the destined place.
∗ If the system is to be transported for long distance, take the fol-
lowing precautions as well:
6) It’s highly recommended to backup the critical data (e.g. patient
data and images) to a DVD/CD or hardcopy.
7) Ensure that the system is well prepared and packed in its original
packaging before transporting.
8) Place the system upwards, and ensure that it is firmly secured
while inside the vehicle during transport.
Warning!
Avoid collisions and excessive vibrations to prevent data loss
or system malfunction.
Never move the equipment which is still operating.
Environmental Conditions for Transportation:
Relative Humidity: 20% to 90%, no condensation
Temperature: -20°C to 55°C
Barometric Pressure: 700 to 1060hPa
2.5 Human Safety
Modern diagnostic ultrasound system has been proved to be safe for daily
diagnostic usage, however, only the well trained/educated medical personnel should operate the equipment. The ALARA (As Low As Reasonably
Achievable) principle must be observed. The following are some more detailed guidelines on safety use of the equipment.
• Keep the power levels and the exposure time as low as possible, as
long as a satisfactory diagnosis has been achieved.
• Use the freeze function or move the probe away from the patient
while not scanning.
• Do not rest the transducer on the skin surface when not scanning.
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• The imaging system of S6 is based on Doppler and Color Doppler
Imaging. The output power of the ultrasound is lower than the limits
as required by the standard IEC 60601-1.
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Chapter 3
Description of the System
3.1 Product Description
The S6 is a professional, general purpose portable color Doppler diagnostic
ultrasound system. It employs digital technology and fully exploits the
potential of integrated circuits. The software is based on Linux system,
which enhances the stability and efficiency while maintains the portability.
The user interface has been optimized for ease of use. The imaging system
can be adjusted during the scanning process; while for advanced users, the
system configurations can be changed quite intuitively.
A wide range of probes make the system suitable for many applications.
To keep the system up to date, the software updates are provided regularly.
To enhance the system performance even more, users may also take the
hardware upgrade service provided by SonoScape. There are a variety of
upgradeable options available.
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S6 Portable Digital Color Doppler Ultrasound System
3.2 System Configuration
Overview of the S6 System
Service Manual
Front View
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Side View
S6 Portable Digital Color Doppler Ultrasound System
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1 Audio Out
2 S-Video Socket
3 Two USB Ports
4 Ethernet Port
5 VGA Port
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Rear View
1
2
3
4
5
6
7
8
9
S6 Portable Digital Color Doppler Ultrasound System
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1 Probe Connection Port 1 6 ECG Port
2 Probe Connection Port 2 7 Equipotential point (earth)
3 Video Printer Controller Port 8 Power Switch
4 Foot Switch Socket 9 Power Input Socket
5 Video Out
3.3 Applications
The S6 system, with a wide range of probes available, is extremely versatile. This section introduces the applications that the S6 system is suitable
for.
6
Small organs (breast, thyroid, testicle and etc.)
6
Vascular
6
Abdomen (liver, spleen, cholecyst, kidney and etc.)
6
Obstetric
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6
Gynecology and fertility
6
Cardiology
6
Urology
6
Musculoskeletal
Note: The application fields are dependent on the probe in use.
Warning!
The S6 system is not intended for ophthalmic use or any use
causing the acoustic beam to pass through the eye.
3.4 Operating Modes
6
B Mode
6
B FLOW
6
Tissue Harmonic Imaging (THI)
6
M Mode
6
Color Doppler Imaging (CDI or CFM)
6
Power Doppler Imaging (DPI)
6
Directional Power Doppler Imaging (DDPI)
6
Pulsed Wave Doppler Imaging (PW)
6
Continuous Wave Doppler Imaging (CW)
6
Tissue Doppler Imaging (TDI)
3.5 Combined Modes
The system provides the following Duplex modes with some in dual display
format.
Notations: Left means left screen, Up means upper screen. Similar for
Right and Down, e.g., Left B+COLOR, Right B implies that the left screen
is of duplex mode, B and CFM, and the right screen is of B mode.
6
Left B, Right B
6
Left B+COLOR, Right B;
6
Left B+COLOR, Right B+COLOR
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S6 Portable Digital Color Doppler Ultrasound System
6
Up B, Down M
6
Up B, Down PW/CW (real time)
6
Up B+COLOR,Down PW/CW
6
Up B+COLOR, Down PW/CW (real time)
6
Up B+COLOR, Down PW/CW (real-time refreshing)
6
Color+M
3.6 Scanning Modes
6
Electronic linear array scanning
6
Sector curved array (convex) scanning
6
Sector phased array scanning
Service Manual
6
Trapezoid linear scanning
3.7 Adjustable Parameters
Users can change these parameters during the scanning process to get the
best image quality.
3.7.1 B Mode
Image Parameters:
6
Bandwidth: 1 to 15MHz
6
Maximum Depth: 32.9cm
6
Sector Width/Angle: 10 to 193 degrees
6
Sector Position: adjustable in imaging area
6
Zoom: magnification factor>10
6
Power: 1% to 100%
6
2D Gain Range: 1 to 255
6
TGC: adjustable for 8 different depth
6
Sound Volume Adjustable
6
Focal Zones: 1 to 9 focal zones may be chosen, with focal distance
adjustable.
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S6 Portable Digital Color Doppler Ultrasound System
6
Persistence range: from 0 to 95, may vary with the probes
6
Line Density: 3 level adjustable (high/medium/low)
6
Chroma: 13 different colors available
6
Adaptive Image Fusion: 6 level adjustable
6
Tissue Characteristic Index: adjustable from 1400 to 1700
6
Image Orientation: flip vertically and/or horizontally
3.7.2 Spectral Doppler (PW/CW)
Image/Video Parameters
6
Video inversion
Service Manual
6
Flow Inversion
6
Sweep Speed: 4 level adjustable
Signal Processing
6
Dynamic Range: 5 level adjustable
6
Chroma: 5 different colors available
6
D Gain: adjustable from 1 to 255
6
Doppler Angle Correction: adjustable from -80 to 80 degrees
6
Sound Volume Adjustable
3.7.3 Color Doppler and Power Doppler
Signal Processing
6
D Gain: adjustable from 1 to 255
6
Persistence Range: 0 to 80 (also depends on the probe in use.)
6
Color Mapping: 4 options available
6
B-Reject Range: from 0 to 255
6
Baseline: 31 level adjustable.
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S6 Portable Digital Color Doppler Ultrasound System
3.7.4 Archive and Backup
6
160G HDD (Hard Disk Drive)
6
Image/Video Format: The system supports local format (PPM and
CIN) and PC format (JPEG, BMP, TIF, AVI and WMV) and offers the
function of conversion from local format to PC format.
6
Cine Playback: More than 1 minute video supported.
6
Accessing local cine files remotely through Ethernet is supported.
6
Data storage using external disks (USB and DVD/CD) is supported.
6
Video output: S-VIDEO/ VGA
3.8 Measurements and Calculations
Service Manual
Measurements Functionality
6
Measurements can be performed either during real-time scanning or
in freeze mode.
Measurements and Calculations for 2D Image
6
Length measurements: straight line, ellipse and perimeter of any
other arbitrary shapes
6
Area measurements: ellipse, rectangular and area of any other arbitrary shapes
6
Volume measurements
6
Doppler area
6
Calculation and measurement in gynecology and fertility applications.
6
LV (Left-Ventricular) measurements and calculations
Available LV Calculation Methods:
● Single Plane Ellipse
● Biplane Ellipse
● Bullet
● Simpson
● Cube
● Teichholz
● Gibson
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S6 Portable Digital Color Doppler Ultrasound System
M Mode
6
Distance
6
Time
6
Slop
6
HR (Heart Rate)
6
LV (Left-Ventricular) measurements and calculations
Available LV Calculation Methods:
● CUBE
● TEICHHOLZ
● GIBSON
● Mitral Valve
Service Manual
● Aortic Valve
4D Analysis Software
Doppler Image
6
Length measurements: straight line, perimeter of ellipse and any
other arbitrary shapes.
6
Area measurements: area of rectangular, ellipse and any other arbitrary shapes.
6
Blood flow velocity and acceleration
6
Time
6
Cardiac measurements: Mitral Valve, Aortic Valve, Tricuspid Valve,
Pulmonary Valve, TEI index
Report Functionality
6
Cardiac
6
OB/GYN
6
Fetal
6
Vascular
6
Urology
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Service Manual
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S6 Portable Digital Color Doppler Ultrasound System
Service Manual
Chapter 4
Principle of the S6 System
4.1 Introduction
This chapter provides the functional explanations of the electronics of the
S6 system.
4.2 System Block Diagram
Figure 4.1: Block Diagram of the S6 System
The DBTR board has the following functionalities: Control the timing and
band width of the emitted ultrasound; Amplify the variable gain of the
echoes; Adjust the electronic focus position, TGC, dynamic filtering, logarithmic compression, demodulation and other signal processing functions.
The echo signals are transmitted to the computer and the DBF board. The
DBF board serves for extracting the Doppler signals from the echo signals, and sends the output signals to the computer system. After processed
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S6 Portable Digital Color Doppler Ultrasound System
Service Manual
through the computer system, the signals are sent to the graphics card and
then to the display (e.g. LCD monitor).
The computer system is the core control unit of S6. Following user instructions from the keyboard, it controls the operating modes and adjusts
the status of the system. The computer system is also responsible for the
display of diagnostic data, calendar, time and etc.
4.3 Principle of Probes
The transducer provides conversions between ultrasonic and electronic signals. At the start of a scanning process, the probe first converts the electronic excitation signals to ultrasonic vibrations. The ultrasonic vibrations
(or ultrasound) propagate into the body of the patient; and the echoes are
picked up by the probe. Electronic signals converted from these echoes are
sent back to the computer system or the DBF board for further processing.
The acousto-electric conversion efficiency and the ultrasound focusing ability are the key features that are vital to the system’s performance, such as
resolution, maximum scanning depth.
4.4 Operating Modes
This section gives brief explanations of the principles of the scanning modes
of the S6 system.
M Mode
Primarily applied in cardiology, M mode provides Time and Motion echo
information derived from a stationary ultrasound beam. It records moving
anatomical structures and produces subtle patterns of motion.
2D/B Mode
B mode image, also called 2D image, provides a cross sectional view of
tissues. The ultrasound image is derived from the tissue echoes that received by the probe. Each echo’s intensity is mapped to a shade of gray;
and the location that the echo occurs is mapped to a unique point on the
screen. Except for linear array probes which produce rectangular images,
most probes produce fan shaped images.
Spectral Doppler(PW/CW)
The spectral Doppler mode detects the movements of red blood cells based
on the Doppler principle. The moving cells reflect the ultrasound sent by
the probe. The echoes are frequency shifted (phase shift are detected for
PW mode) as a result of Doppler Effect. The spectral distribution of the
echoes reveals details of the blood flow: red (blue) shift implies flow away
from (towards) the probe head. The pulsed wave mode (PW) is normally
applied at detecting low flow velocity, while the continuous wave mode
(CW) is normally for measuring high speed blood flow.
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S6 Portable Digital Color Doppler Ultrasound System
Service Manual
Color Flow Mode (CFM)
CFM (Color Flow Mode) is also called CDI (Color Doppler Mode) sometimes. CFM combines 2D grayscale imaging with color imaging. The 2D
imaging gives information on tissues; the color imaging, which uses the
Doppler principle, gives information on blood flow. The output is the color
image overlaid with the 2D grayscale image.
Power Doppler (DPI)
The color image in Power Doppler Imaging (DPI) is in principle different
from that in CFM. DPI analyzes amplitude shift, while CFM analyzes frequency shift. The color image is overlaid onto the 2D grayscale image
which gives information on tissues. DPI is capable of detecting low speed
blood flow.
A high pass filter (wall filter) is used to remove the signals from stationary
or slowly moving structures. Tissue motion is discriminated from blood
flow by assuming that blood is moving faster than the surrounding tissue,
although additional parameters may also be used to enhance the discrimination. The power in the remaining signal after wall filtering is then averaged over time (persistence) to present a steady state image of blood flow
distribution.
4.5 Functional Boards/Units of the S6 System
Besides the probes, the S6 system consists of the following critical functional boards/units.
6
MPC board: Also called probe board. Two probes can be connected
at the same time and one of them active (scanning).
6
DBTR board: It has an emitting pulse synthesizer and a receiving
signal preamplifier/TGC. The DBTR sends electronic signals to drive
the probes and pre-amplifies the echoes.
6
DBF board: It converts analog signals to digital signals and sends
the signals for digital beam forming (DBF). DBF board also has scan
controller, front end controller, demodulation unit and USB ports.
6
DBHV board: It provides the high voltages for the pulse generator
and the low voltages for other system units. The ECG and 4D motor
units are also on this board.
6
PC Motherboard: It is the core data processing unit of the S6 system.
6
Power supply: ATX SMPS power supply. It provides stable power
supply to the whole system (probes, host and LCD monitor).
6
User Keyboard: hard keys, trackball, flip switches and knobs.
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S6 Portable Digital Color Doppler Ultrasound System
DBF Board
7500-0821-XX
DBTR Board
7500-0820-XX
DBHV Board
7500-0822-XX
KEAA board
7500-3039-XX
Motherboard
2101-0008
Power Supply HDD
Monitor
KBD board
7500-0813-XX
USB Cable
Power Calbe
IDE Cable
PS2 Cable
S
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P
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Printer
Loudspeaker
Cable
Printer Cable
F
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ot
S
w
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ch
C
ab
l
e
Loudspeakers
Foot Switch
VGA Cable
Voltage
Conversion Board
P
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C
a
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l
e
Fan
P
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a
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VIDEO
OUT
D
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ECG
D
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Power Cable
P
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C
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6
Monitor: 15 inch LCD
6
Loudspeakers: Serve as Doppler audio device.
4.5.1 Functional Block Diagram
Service Manual
Figure 4.2: Functional Block Diagram
4.5.2 Explanations of the System Functions
The electronic pulse signals are sent to the DBTR board from the RAM
of the DBF board. After processing, DBTR sends the HV signals to drive
the piezo oscillator in the probe. The probe emits the ultrasonic sounds towards patient, and also picks up the echoes. The signals are then processed
by the front end amplifier and the TGC, both on the DBTR board. At the
same time, the DBF board converts the analog signals to the digital signals,
utilizes the digital dynamic receive focusing and dynamic tracing technologies, and then demodulates. With some further processing, the signals
carrying image information are transmitted to the computer through high
speed USB2.0 connection. The computer processes the image data, and
the tissue and/or blood flow information is displayed on the screen. The
computer also takes user inputs from the keyboard, and sends the control
signals to the DBF board through USB2.0 port. Peripherals and Ethernet
ports are available on the Motherboard. The switching power supply for
medical use provides 12V and 5V DC outputs to other system units/boards.
The DBHV board supplies 90V DC and the low voltages for other digital
and analog circuits.
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4.6 Part List
S6 Portable Digital Color Doppler Ultrasound System
Service Manual
Part No. Name
7500-0826 MPC
7500-0820 DBTR
7500-0821 DBF
7500-0822 DBHV
7500-0815 KBD
7500-3039 KEAA
2101-0008 PC Motherboard
2101-0152 HDD
3900-0012 LCD Monitor
NA
Voltage Inversion
Board
Quantity
1
1
1
1
1
1
1
1
1
1
Description
Probe connection PCB board
Emission/Reception PCB board
PCB board for receiving digital
beam forming and signal processing
PCB board providing high voltages
Keyboard PCB board
KEAA board serves as a hub
for interconnecting other PCB
boards.
It is the central control unit for
data processing and video/audio
output.
160G hard disk drive
Designed exclusively for medical
use
Provides high voltage source for
LCD.
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Service Manual
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