Sun Nuclear 549 User manual

Title
General & Small Parts Phantom
User Guide
Model 549

Page ii
General & Small Parts Phantom User Guide
© 2014–2023 by Computerized Imaging Reference Systems, Inc. All rights reserved.
The information contained in this guide is copyrighted and all rights reserved by CIRS. Copying,
duplicating, selling, or otherwise distributing any part of this guide without the prior written con-
sent of CIRS is prohibited.
CIRS reserves the right to make periodic modifications to this guide without obligation to notify
any person or entity of such revision.
30 January 2023
CIRS
900 Asbury Ave
Norfolk, VA 23513 USA
[phone]
www.sunnuclear.com

Page iii Contents
Section 1. Introduction . . . . . . . . . . . . . . 1
Tissue-Mimicking Materials . . . . . . . . . . . . . . . . . . 1
Sound Velocity of Rubber-Based TM
Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Effect of Temperature . . . . . . . . . . . . . . . . . . . . 1
Product Description . . . . . . . . . . . . . . . . . . . . . . . . 1
Tests Performed . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Section 2. Setup . . . . . . . . . . . . . . . . . . . 3
Baseline Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General Guidelines for Setting Up the
Phantom for Scanning . . . . . . . . . . . . . . . . . . . . 3
Phantom Recertification . . . . . . . . . . . . . . . . . . . . . 3
Section 3. Testing Procedures. . . . . . . . . 4
Dead Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Description and Reason for Testing. . . . . . . . . . 4
Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . 4
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vertical Measurement Calibration. . . . . . . . . . . . . . 5
Description and Reason for Testing. . . . . . . . . . 5
Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . 5
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Horizontal Measurement Calibration . . . . . . . . . . . 6
Description and Reason for Testing. . . . . . . . . . 6
Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . 6
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Axial and Lateral Resolution . . . . . . . . . . . . . . . . . . 7
Description and Reason for Testing. . . . . . . . . . 7
Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . 7
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Focal Zone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Description and Reason for Testing. . . . . . . . . . 8
Testing Procedure . . . . . . . . . . . . . . . . . . . . . . . 8
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Sensitivity (Maximum Depth of Penetration) . . . . . 9
Description and Reason for Testing . . . . . . . . . . 9
Testing Procedure. . . . . . . . . . . . . . . . . . . . . . . . 9
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Functional Resolution and Image Uniformity . . . . 10
Description and Reason for Testing . . . . . . . . . 10
Testing Procedure. . . . . . . . . . . . . . . . . . . . . . . 11
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Gray Scale & Displayed Dynamic Range . . . . . . . . 11
Description and Reason for Testing . . . . . . . . . 11
Testing Procedure. . . . . . . . . . . . . . . . . . . . . . . 11
Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Section 4. Support and Maintenance. . . 13
Hardware Maintenance . . . . . . . . . . . . . . . . . . . . . 13
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Disposal and Recycling. . . . . . . . . . . . . . . . . . . 13
Contacting Sun Nuclear Support. . . . . . . . . . . . . . 13
Support Website. . . . . . . . . . . . . . . . . . . . . . . . 13
Section 5. Specifications . . . . . . . . . . . . 14
Target Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Product Specifications. . . . . . . . . . . . . . . . . . . . . . 15
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Tissue-Mimicking Material . . . . . . . . . . . . . . . . 15
Line Targets . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Anechoic Target Structures . . . . . . . . . . . . . . . 16
Gray Scale Target Structures . . . . . . . . . . . . . . 16
Appendix A: Regulatory Supplement . . 17
Sun Nuclear Corporation Symbols . . . . . . . . . . . . 17
Operator Responsibility . . . . . . . . . . . . . . . . . . . . . 18
Reporting Health or Safety Related Issues or
Concerns. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Modifications to Equipment . . . . . . . . . . . . . . . . . 18
Contents

Contents Page iv
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Page 1 Introduction
1 Introduction
Tissue-mimicking (TM) phantoms are used to evaluate the performance of diagnostic ultrasound
imaging systems. The phantoms mimic the acoustic properties of human tissue and provide
target structures within the simulated environment. They are essential to detect the performance
changes that occur through normal aging and deterioration of system components. Routine
equipment performance monitoring can reduce the number of repeat examinations, duration of
examinations, and maintenance time. Phantoms are employed in the areas of Clinical Quality
Assurance, Preventative Maintenance Programs, Field Service Testing, Research and
Development, Manufacturing, Teaching, and Sales & Marketing.
Tissue-Mimicking Materials
ATS offers a choice between standard hydrogel-based (water) or rubber-based, tissue-mimicking
material. The choice between rubber-based or Hydrogel TM material is a trade-off of benefits.
Sound Velocity of Rubber-Based TM Material
The sound velocity of most diagnostic imaging systems is calibrated to 1540 meters per second
(mps), the assumed average velocity of sound through human soft tissue. The rubber-based,
tissue-mimicking material has a sound velocity of 1450 mps at room temperature (23°C). The line
targets and anechoic target structures have been physically positioned to compensate for the
differences in the speed of sound, assuring accuracy of measurements.
Effect of Temperature
The acoustic properties of all biologic and non-biologic materials are affected by temperature
variations. Most diagnostic imaging systems and tissue-mimicking phantoms are calibrated at
room temperature, commonly referred to as 23°C. ATS has affixed a thermometer strip to the
outside surface of the phantom housing; room temperature is reflected on the strip, not the
interior of the phantom. Therefore, if a rubber-based phantom is exposed to extreme
temperatures for several hours, it will take the equivalent amount of time to reach room
temperature once again. If leaving the phantom in your car overnight during a typical New England
winter, while the phantom will not be damaged, you will need to wait approximately 24 hours for
it to reach room temperature.
Product Description
The Model 549 General & Small Parts Phantom is an easy, comprehensive means of evaluating
imaging systems with an operating frequency range of 2.25 to 15.0 MHz. The first 6 cm of this
model has been designed to accommodate the higher frequencies, whereas the area between 6-
30 cm is reserved for frequencies less than 7.5 MHz. When filled with water, the scanning wells
provide an ideal means to evaluate endoscopic probes. Simply place the active area of the
transducer on the surface of the phantom. The procedure is the same as for any standard linear
transducer.
Model 549 is designed with a combination of monofilament line targets for distance
measurements and tissue-mimicking target structures of varying sizes and contrasts. One
hundred and twenty cystic-like target structures are positioned inline vertically, thereby permitting
an entire target group to be displayed in one view. Due to the acoustic similarity of the background
material and the target structures, artifacts caused by distortion, shadowing, or enhancement
have been eliminated. Six gray scale targets ranging in contrast from +15 to -15 dB are provided
to evaluate the system’s displayed dynamic range and gray scale processing performance.

Introduction Page 2
Tests Performed
The following tests are performed:
• Dead Zone or Ring-Down
• Vertical Measurement Calibration
• Horizontal Measurement Calibration
• Focal Zone
• Sensitivity/Penetration
• Axial & Lateral Resolution
• Functional Resolution
• Image Uniformity
• Gray Scale & Displayed Dynamic Range

Page 3 Setup
2 Setup
Baseline Values
The baseline represents the instrument’s peak performance. Ideally, the baseline values are
established immediately following the installation and acceptance of a new imaging system. If this
is not possible, then they are established immediately after preventive maintenance and servicing
by a qualified service engineer.
Scan the Model 549 General & Small Parts Phantom, while adjusting the controls to produce the
best possible image. If the bottom of the phantom is visualized, adjust the depth of penetration
until only the lower targets are visualized without artifacts produced from the work surface. One
should take care to avoid over emphasizing a particular area of the image. Make the display
monitor’s brightness and contrast settings and the room lighting conditions reflect a clinical
environment.
When an acceptable image has been obtained with a particular scanner-transducer pair, the
system settings must be accurately documented on the quality assurance record. The settings
that should be included are as follows: dynamic range, gray scale level, power level, gain level,
and time gain compensation (TGC).
Remember, the accuracy or the baseline values obtained and recorded are extremely important.
These values will become the basis for all future performance testing. Some systems have the
ability to save the baseline values. When recalled, the system is automatically set up to reflect the
programmed baseline values, thereby reducing the potential for errors.
General Guidelines for Setting Up the Phantom for Scanning
1 Place the phantom on a clean, flat surface with scanning surface #1 positioned for use.
2 Apply an adequate amount of low viscosity gel or water to the scan surface. If water is used,
fill the scanning well slowly to avoid introduction of air bubbles.
3 Set up the imaging system-transducer pair in accordance with the established baseline
values. Record these settings on the quality assurance record.
Phantom Recertification
Recertification of an ATS rubber-based phantom can be performed at any time in accordance with
an individual institution’s quality assurance procedure. ATS produces a test block of TM material
for every rubber-based phantom sold. The test block is used to measure the acoustic properties
of the phantom as part of the product’s final quality assurance procedure. The test block is
retained at the company for future reference and testing during the recertification process.
The procedure for phantom recertification is simple. The phantom is returned to our facility with
all shipping charges paid by the customer. The following steps are performed:
1 Upon arrival, the phantom is inspected for physical damage.
2 The test block is retrieved from the storage library, and the acoustic properties are measured.
3 The phantom is than scanned repeating all of the original tests.
4 Results are than compared with the original results on file.
5 A new Quality Assurance certification document similar to the one originally received when
the phantom was purchased will be issued. The phantom is then returned to the customer.

Testing Procedures Page 4
3 Testing Procedures
Dead Zone
Description and Reason for Testing
The dead zone is the distance from the front face of the transducer to the first identifiable echo at
the phantom/patient interface. The dead zone occurs because an imaging system cannot send
and receive data at the same time. Therefore, no clinical data can be collected in this region.
However, if artifacts are noted within the dead zone, they may indicate fluctuations in the input
power to the system. The depth of the dead zone depends upon the frequency and performance
of the transducer and the pulsing/receiving section of the system.
Testing Procedure
6 Scan the phantom until the dead zone target group is clearly displayed. Freeze this image.
7 This group is composed of 9 line targets. The first target is positioned 2 mm below the scan
surface. Subsequent targets are spaced 1 mm apart, to a depth of 10 mm.
8 Using the electronic calipers, measure the distance between the first target imaged and the
echo produced by the scan surface. The resulting value will be the depth of the dead zone.
9 Document the depth measurement on the quality assurance record.
Results
The system’s dead zone should remain consistent from week to week when using the same
instrument settings and the Model 549 phantom. Compare the test results obtained from the
baseline records. If the current image demonstrates changes in the system’s ability to resolve
these targets, corrective action should be considered.
Figure 3-1. Dead Zone Dataflow and Target Diagram

Page 5 Testing Procedures
Vertical Measurement Calibration
Description and Reason for Testing
Vertical distance measurements are obtained along the axis of the sound beam. Accurate
representation of the size, depth, and volume of a structure is a critical factor in a proper diagnosis.
Most imaging systems use depth markers and/or electronic calipers to obtain these
measurements. The phantom is scanned and a distance measurement obtained using the timing
markers and/or electronic calipers. The resulting measurement is then compared to the known
distance between the line targets in the phantom. The accuracy of vertical distance
measurements depends on the integrity of the timing circuitry of the imaging system.
Testing Procedure
1 Position the transducer over the vertical group of line targets until a clear image is obtained.
Freeze the display.
2 Using the electronic calipers or the timing markers, measure the greatest distance that can
be clearly imaged between line targets.
3 Document the measurement obtained on the quality assurance record.
Results
The system’s vertical distances measurements should remain consistent from week to week
when using the same instrument settings and the Model 549 phantom. Compare the test results
obtained from the baseline records. If the current image demonstrates changes in the system’s
ability to resolve these targets, corrective action should be considered.
Figure 3-2. Vertical Distance Measurements Dataflow and Target Diagram

Testing Procedures Page 6
Horizontal Measurement Calibration
Description and Reason for Testing
Horizontal distance measurements are obtained perpendicular to the axis of the sound beam.
Proper diagnosis is dependent upon the accurate representation of the size and volume of a
structure being examined. Most imaging systems use distance markers and/or electronic calipers
to obtain these measurements. The phantom is scanned and a distance measurement obtained.
The resulting measurement is then compared to the known distance in the phantom. The
accuracy of the horizontal distance measurements depends on the integrity of the transducer
scanning assembly, the output intensity, and the resolution of the imaging system.
Testing Procedure
1 Position the transducer over the horizontal group of line targets until a clear image is obtained.
Freeze the image.
2 Using the electronic calipers or the timing markers, measure the greatest distance that can
be clearly imaged between line targets displayed.
3 Document all of the measurements on the quality assurance record.
Results
The system’s horizontal distance measurements should remain consistent from week to week
when using the same instrument settings and the Model 549 phantom. Compare the test results
obtained from the baseline records. If the current image demonstrates changes in the system’s
ability to resolve these targets, corrective action should be considered.
Note: The Model 549 phantom provides two scanning surfaces used to evaluate hori-
zontal measurement calibration. Due to the geometry and variety of sector scan
transducers, a separate set of horizontal line targets are provided to evaluate lateral res-
olution. Please refer to Specifications on page 14 for the location of these groups.
Note: Some sector scanners have distance markers on the outside edges of the sector
image with no other indicators available. Hand-held calipers must be used for distance
measurements within the image on the monitor.

Page 7 Testing Procedures
Figure 3-3. Horizontal Distance Measurements Dataflow and Target Diagram
Axial and Lateral Resolution
Description and Reason for Testing
Resolution is the minimum reflector separation between two closely spaced objects which can be
imaged separately along the axis of the beam, whereas lateral resolution defines the system’s
ability to image objects separately that lie perpendicular to the axis of the sound beam. If a system
has poor resolution capabilities, small structures lying close to each other will appear as one
image, causing improper interpretation of the ultrasound findings. Axial resolution depends on the
transducer’s center frequency, damping characteristics, and pulse length. Generally, the higher
the frequency, the better the system’s axial resolution. Lateral resolution depends on the beam
width, focusing characteristics of the transducer, number of displayed scan lines, and the
system’s sensitivity and gain settings.
Testing Procedure
Model 549 provides three scanning surfaces to evaluate axial-lateral resolution at nine given
depths. Target locations in the phantom are referenced from the first axial target.
The line targets are spaced at 4.0, 3.0, 2.0, 1.0, and 0.05 mm intervals both axially and laterally.
The last point of the axial array target group is also the first target point in the lateral array group.
1 Position the transducer over the axial-lateral resolution group of line targets on the phantom
until a clear image is obtained. Freeze this image.
2 Examine the image to determine if all of the line targets within the group are clearly displayed
as separate target points. Record the closest spaced target points which can be imaged (refer
to specification drawing). Obtain a hard copy of the display.
3 Document all observations made on the quality assurance record.
4 If required, repeat the above procedure for the remaining 8 depths, using scanning surfaces
#2, #3, and #4.

Testing Procedures Page 8
Results
The system’s ability to resolve the array targets at given depths should remain consistent from
week to week when using the same instrument settings and the Model 549 phantom. Compare
the test results obtained from the baseline records. If the current image demonstrates changes in
the system’s ability to resolve these targets, corrective action should be considered.
Figure 3-4. Axial and Lateral Resolution Dataflow and Target Diagram
Focal Zone
Description and Reason for Testing
The focal zone is the region surrounding the focal point in which the intensity and lateral resolution
are the greatest. Clinically, structures examined within the focal zone will provide the best
diagnostic information obtainable. The focal zone can be affected by changes in the pulsing/
receiving section of the imaging system or damage to the transducer.
Testing Procedure
1 Position the transducer over the vertical group of line targets on the phantom until a clear
image is obtained. A line rather than a dot is produced on the display. The length of the line
is indicative of the width of the beam. Therefore, targets inside the focal zone form a shorter
line than those outside of the focal zone. Adjustments in the gain settings will change the
length of the line targets displayed. Freeze the display and obtain a hard copy.
2 For a variable focused transducer, scans with several different focal zone settings should be
performed. Dynamically focused transducers may not display changes in the width of the line
targets. However, a change in the intensity can be observed upon adjustment of the
transmitting focus of the transducer.
3 Using the hard copy, draw a line connecting the ends of the echoes received from the line
targets (both sides); the line should form a smooth curve. This will illustrate the shape of the
sound beam. Now locate the narrowest portion; this is the focal zone. Measure the width of
the beam and the depth at this point.
4 Document the depth of the focal zone and the measurement of the focal width on the quality
assurance record.

Page 9 Testing Procedures
Results
The system’s focal zone should remain consistent from week to week when using the same
instrument settings and the Model 549 phantom. Compare the test results obtained from the
baseline records. If the current image demonstrates changes in the system’s ability to resolve
these targets, corrective action should be considered.
Figure 3-5. Focal Zone Dataflow and Target Diagram
Sensitivity (Maximum Depth of Penetration)
Description and Reason for Testing
The ability of an imaging system to detect and display weak echoes from small objects located at
specified depths (penetration) is referred to as sensitivity. Clinically, weak reflecting echoes are
commonly produced from internal structures of organs. Definition of these structures can be
extremely important in the interpretation of the ultrasound findings. Sensitivity can be affected by
the pulser/receiver section of the system, degree of focusing of the transducer, attenuation of the
medium, depth and shape (geometry) of the reflecting object, and electromagnetic interference
from the local surroundings. A system’s maximum depth is limited by output power, TGC, gain,
transducer frequency, focal depth, number of scan lines, and electrical noise.
Testing Procedure
1 Position the transducer over the 8 mm group of anechoic targets.
2 Freeze image and obtain a hard copy.
3 Examine the image to determine the last or deepest target structure displayed. Using the
electronic calipers or the timing markers, measure the depth of this target.
4 This test should also be performed with output levels set at the highest and lowest settings.
This enables any changes in output to be more easily detected.
5 Document the depth measurement on the quality assurance record.

Testing Procedures Page 10
Results
The system’s depth of penetration should remain consistent from week to week when using the
same instrument settings and the Model 549 phantom. Compare the test results obtained from
the baseline records. If the current image demonstrates changes in the system’s ability to resolve
these targets, corrective action should be considered.
Figure 3-6. Sensitivity Dataflow and Target Diagram
Functional Resolution and Image Uniformity
Description and Reason for Testing
Functional resolution is an imaging system’s ability to detect and display the size, shape, and
depth of the non-echogenic target structures within the TM matrix of the test phantom. The
targets should appear circular with sharp clearly defined edges, indicating an abrupt transition
from the echogenic to the non-echogenic region. The targets are anechoic and should be free of
any internal echoes or fill-in.
Bright artifacts may be observed at the top and bottom of the targets.These are normal specular
reflections and do not present a problem. However, an observable shade of gray within the
anechoic target usually is indicative of internal system noise and/or the presence of side lobes.
Should the targets appear flattened, a geometric distortion problem should be considered. In
practice, the data obtained will give a direct indication of the smallest diameter target the system
is capable of resolving at a given depth. The functional resolution capabilities of a system can be
affected by side lobes in the transducer beam, electrical noise, and problems in the imaging
processing hardware.
These artifacts can be the result of transducer malfunction, poor electrical contacts, failure in the
image processing and/or system’s software, and poor acoustic coupling between the transducer/
patient interface causing the introduction of reverberations artifacts. Generally, horizontal bands
are often caused by circuitry and focusing problems while vertical bands indicate a damaged
transducer element.

Page 11 Testing Procedures
Testing Procedure
1 Position the transducer over the anechoic target structures until a clear image is obtained.
2 Freeze image and obtain a hard copy.
3 Examine the image to determine the first and last target in each size group displayed. Record
the range of depths visualized for each group. Due to the configuration of the sound beam,
small targets in the near field may not be imaged.
4 Scan this region to determine if there are any areas of nonuniformity. If the initial image
demonstrates nonuniformity or artifacts of this type, repeat the scan at a different location
using the same phantom to rule out a defect in a particular region of the phantom. If the
artifacts are still present, note the gain settings, gray scale level, and focal setting, and
document with a photograph. Repeat the scan using a different gain and focal setting.
5 Document all findings on the quality assurance record.
Results
The system’s functional resolution and image uniformity should remain consistent from week to
week when using the same instrument settings and the Model 549 phantom. Compare the test
results obtained from the baseline records. If the current image demonstrates changes in the
system’s ability to resolve these targets, or major areas of image nonuniformity are observed,
corrective action should be considered.
Figure 3-7. Functional Resolution and Image Uniformity Dataflow and Target Diagram
Gray Scale & Displayed Dynamic Range
Description and Reason for Testing
Gray scale or gray scale processing uses the amplitude of the echoes received to vary the degree
of brightness of the displayed image. The adjustment of the echo signal required to go from a just
noticeable (lowest gray scale level) echo to the maximum echo brightness is referred to as the
displayed dynamic range. Clinically, gray scale processing and displayed dynamic range allow
echoes of varying degrees of amplitude to be displayed in the same image.
Testing Procedure
1 Position the transducer over the gray scale target group until a clear image is obtained.
2 Freeze image and obtain a hard copy.

Testing Procedures Page 12
3 Examine the image. The targets should appear circular in shape with clear sharp edges and
vary in the degree of brightness ranging from low to high levels of contrast. The presence or
absence of any shadowing behind the structures should be noted.
4 All findings should be documented on the quality assurance record.
Results
This target group varies in echogenicity and provides a good indication of the performance of the
gray scale processing and displayed dynamic range. The system’s gray scale processing should
remain consistent from week to week when using the same instrument settings and the Model
549 phantom. Compare the test results obtained from the baseline records.If the current image
demonstrates changes in the system’s ability to resolve these targets, corrective action should be
considered.
Figure 3-8. Gray Scale & Displayed Dynamic Range Dataflow and Target Diagram
References:
Michell M. Goodsitt, Paul Carson; “Real-Time B-mode Ultrasound Quality Control Test Procedures, Report of
AAPM Ultrasound Task Group No. 1,” Medical Physics, 25 (8) August 1998
W. N. McDicken, PhD, “Diagnostic Ultrasonics, Principles and Use of Instruments,” John Wiley & Sons, 1976.
Sandra L. Hagen-Ansert; “Textbook of Diagnostic Ultrasonography,” Mosby, 1989.

Page 13 Support and Maintenance
4 Support and Maintenance
Hardware Maintenance
Inspection
Periodically inspect the phantom and accessories for damage. If damage is visible, if any
mechanical or electrical degradation is suspected, or if errors are suspected, discontinue use and
contact Sun Nuclear Support. See Contacting Sun Nuclear Support.
Repair
The phantoms and the parts provided with the phantoms cannot be repaired by the user. If there
are problems with any of the devices, contact Sun Nuclear Support.
Cleaning
For best results, the phantom should be kept clean at all times. In particular, a buildup of dried
coupling gel on the scan surface should be avoided. The phantom may be cleaned with mild hand
soap and warm water. Particularly stubborn stains and dirt may be removed with a mild household
cleaner. The use of petroleum solvents should be avoided since they may adversely react with the
rubber-based material.
Disposal and Recycling
Contacting Sun Nuclear Support
You may request support in two ways:
• Submit a support request using our online form. See Support Website below.
• Contact the Sun Nuclear Support team by telephone:
• U.S.A.: [phone], Option 3
• Netherlands: [phone], Option 1
• Germany: [phone], Option 2
Support Website
1 Open an internet browser and navigate to www.sunnuclear.com/support.
2Enter your email address and password and then click Login.
• To download product information, click Products and Devices, select the product, and
then select the download type.
• To open a Support request, click Open New Case, complete the form, and then click
Create Case.
Do not discard unit as waste. Recycle the components in accordance
with local regulations.

Specifications Page 14
5 Specifications
Target Diagram
Figure 5-1. Model 549 Target Diagram

Page 15 Specifications
Product Specifications
General
l
Tissue-Mimicking Material
Line Targets
Vertical Group
Horizontal Group
Dead Zone Group
Characteristic Specification
Overall Dimensions 36.5 x 25.7 x 9.5 cm*
Housing Material PVC
Wall Thickness 1.0 cm*
Scan Surfaces 4
Scan Surface Dimensions 21.0 x 7.0 cm
31.5 x 7.0 cm
Weight 7.1 kg (15.5 lb)
Characteristic Specification
Type Urethane rubber
Freezing Point < -40°C
Melting Point > 100°C
Attenuation Coefficient 0.5 dB/cm/MHz ± 10.0%
Measured at 3.5 MHz
Speed of Sound 1450 mps ± 1.0% at 23°C
Characteristic Specification
Material Monofilament nylon
Diameter 0.08 mm & 0.12 mm
Characteristic Specification
Interval Spacing
• Depth 1.0–6.0 cm
• Depth 6.0–30.0 cm
• 0.5 cm
• 1.0 cm
Depth 1.0–30.0 cm
Characteristic Specification
Number of Groups 8
Interval Spacing 1.0 cm
Depths
• Linear Array Group
• Sector/Convex Array Group
• 2.0, 5.0, 14.0, 20.0 cm
• 2.5, 5.5, 15.0, 21.0 cm
Characteristic Specification
Lateral Displacement 5.0 mm
Interval Spacing 1.0 mm
Depth 2.0–10.0 mm