Cirs Doppler String Phantom 043 Manuale utente

900 Asbury Ave • Norfolk, Virginia 23513 • USA • Tel: 757-855-2765 • WWW.CIRSINC.COM

USER GUIDE

Doppler String Phantom

Model 043

Table of Contents

OVERVIEW ......................................................................................................................................................... 1

Features of the Doppler String Phantom .............................................................................................................. 1

Starting a Quality Assurance Program ................................................................................................................. 1

SETUP INSTRUCTIONS ..................................................................................................................................... 2

Parts List ............................................................................................................................................................. 2

Using the Diffuser Mat ......................................................................................................................................... 3

Installing the String .............................................................................................................................................. 3

Filling the Tank..................................................................................................................................................... 3

Setting up the Clamp........................................................................................................................................... 4

Connecting the Controller.................................................................................................................................... 5

SPECIAL FEATURE

Using The ECG Output ....................................................................................................................................... 5

OPERATING INSTRUCTIONS ............................................................................................................................ 6

Using Constant Speeds....................................................................................................................................... 6

Using Preprogrammed Waveforms ...................................................................................................................... 6

RS-232 INSTRUCTIONS .................................................................................................................................. 7

Introduction ......................................................................................................................................................... 7

Getting Started.................................................................................................................................................... 7

Accessing the Help Menu.................................................................................................................................... 8

Selecting Velocities and Waveforms..................................................................................................................... 9

Setting Up for Quality Control Testing .................................................................................................................. 9

Locking the Settings.......................................................................................................................................... 10

Description of Commands Available Via RS-232................................................................................................ 10

MAINTENANCE INSTRUCTIONS ................................................................................................................... 11

Making String Loops ......................................................................................................................................... 11

Ordering String Loops ...................................................................................................................................... 11

Cleaning the Doppler String phantom ............................................................................................................... 11

Calibrating the Doppler String Phantom............................................................................................................. 11

Replacing a fuse................................................................................................................................................ 12

ACCESSORIES AND PARTS............................................................................................................................ 12

Carrying Case.................................................................................................................................................... 12

Preformed String Loops..................................................................................................................................... 12

Step Up and Down Transformer ........................................................................................................................ 12

WARRANTY ..................................................................................................................................................... 13

Non-Warranty Service........................................................................................................................................ 13

APPENDIX A GRAPHS OF WAVEFORMS....................................................................................................... 14

Test Waveforms................................................................................................................................................. 14

Physiological Waveforms ................................................................................................................................... 19

APPENDIX B SAMPLE QA FORM .................................................................................................................. 26

OVERVIEW

Features of the Doppler String Phantom

The Doppler String phantom is a very accurate device for testing Doppler ultrasound scanners. It is especially

useful for checking sample volume registration, color registration, directional discrimination, and Doppler velocity

accuracy.

The Doppler String Phantom offers superior accuracy by using a string target that never changes (unlike sus-

pended scatterers in ﬂuid ﬂow phantoms) and a crystal-controlled motor. The motor speed is adjusted 1000

times per second, allowing realistic reproductions of human blood ﬂow velocity patterns and a wide range of con-

stant velocities.

The Doppler String Phantom has been designed for ease of use. It can be set up quickly and easily with ordinary

tap water. It is simple to use and almost no maintenance is required. An RS-232 interface is also provided for

automated use, if desired. Ultrasound technologists, biomedical technicians, researchers and manufacturers all

rely on the Doppler String Phantom for hassle-free, reliable testing.

Starting a Quality Assurance Program

Each ultrasound lab will have different Quality Assurance (QA) needs depending on equipment, maintenance

agreements and applicable laws and policies. However, many technicians recommend performing QA tests

every 3 months. Of course, any time you suspect a problem with an ultrasound scanner, you will want to test it

immediately.

CIRS recommends using a standard form to record the results of your tests, so you can be sure that each testing

session is consistent and thorough. Recording your ﬁndings also provides written documentation of your QA

program. A sample QA form is provided in Appendix B of this User Guide.

SETUP INSTRUCTIONS

Parts List

When you unpack the Doppler String Phantom for the ﬁrst time, you should ﬁnd:

• Electronic Controller

• Acrylic tank with motor and pulleys attached

• Scanhead Clamp

• Set of 5 String Loops (not pictured)

• Rubber Diffuser Mat (not pictured)

• Power Cord (not pictured)

• Carrying Case (not pictured)

Figure 1: Doppler String Phantom

Electronic

Controller

Scanhead Clamp

Motor

Acrylic Tank

Using the Diffuser Mat

The black rubber Diffuser Mat is provided to reduce reverberations in the tank by absorbing and scattering the

ultrasound beam. Place the mat in the bottom of the tank with the ridges facing up, if desired.

Installing the String

If your Doppler String Phantom was shipped in a custom carrying case, the string target is already installed. If

not, you will need to install the string by doing the following:

1. Loosen the adjusting screw on the two pulleys at the end of the tank opposite

the motor.

2. Take one of the string loops out of the bag and lay it over the pulley that is

attached directly to the motor (Motor Pulley).

3. Draw the string half-way around the Motor Pulley, behind the two Idler Pulleys

below the motor, and around the pair of Adjustable Pulleys at the other end of

the tank. (See Figure 2).

4. Adjusting the string tension by moving the Adjustable Pulleys until the string is

fairly tight, but not tight enough to break. The actual tension will not affect the

data.

Figure 2: String Installation

About Reverberations:

Water conducts ultrasound

more efﬁciently than the

human body, so it may be

necessary to reduce the

power level on your ultra-

sound scanner to a mini-

mum for best results.

FILLING THE TANK

Place the tank on a ﬁrm surface and ﬁll it with either cold tap water or velocity-corrected ﬂuid (see sidebar).

Fill the tank until the two small pulleys beneath the motor are just submerged. This depth works well, but it may

be changed to meet your needs.

After ﬁlling the tank, there will be dissolved air bubbles in the water. For best results, wait an hour before using

the Doppler String Phantom so the water can de-gas.

Setting up the Clamp

The Doppler String Phantom is shipped with a scanhead clamp system con-

sisting of a clamp (see Figure 3), an "arm" with a center joint and an arm at-

tachment ﬁxture, which is bolted to the tank. If your Doppler String Phantom

was shipped in a custom carrying case, the clamp will have been set up at the

factory and you should skip step 1.

1. The arm attachment ﬁxture on the tank has two sockets.

Insert one end of the arm into either of the sockets and tighten the

thumbscrew.

2. Turn the clamp adjusting knob to open or close the clamp so that it

ﬁts your scanhead.

3. Adjust the clamp and articulated arm so that the transducer end of the

scanhead is in the water. (See Figure 4). Make sure your scanhead is at the

desired angle with respect to the string.

Note: Although the scanhead clamp can be placed in water temporarily, it should

be stored in a dry location to prevent corrosion.

Figure 3: Scanhead Clamp

Clamp

Adjusting

Knob

About Velocity Corrected

Fluid:

The speed of sound is 1480

meters per second in water

and 1540 meters per second

in the human body. Doppler

scanners are calibrated for

1540 meters per second, so

some ultrasound profession-

als prefer to use a water/gly-

col mix that also has a speed

of sound of 1540 meters per

second. This mix is called

velocity corrected ﬂuid.

The Doppler String Phantom

has been designed to work

with either plain water or

velocity-corrected ﬂuid (H2O/

Glycol). When you turn on

the power, the Doppler String

Phantom will ask you which

type of ﬂuid you are using.

When set for use with water,

the Doppler String Phantom

compensates for the different

speed of sound by adjust-

ing the speed of the string

and the display indicates the

speed your scanner should

be detecting. When set for

use with velocity-corrected

ﬂuid, the Doppler String Phan-

tom moves the string at the

actual speed indicated on the

display.

Connecting the Controller

You are now ready to connect the controller to the motor and the power supply.

1. Before plugging in the controller make sure the power switch on the back is turned off.

2. Plug the motor cable into the Drive Motor receptacle on the back of the controller.

3. Plug the power cable into the AC Receptacle and into an AC power source. If using in a country other than

the United States you will need to connect the transformer as well. This can be purchased for an additional

price.

SPECIAL FEATURE

Using the ECG Output

The ECG (electrocardiogram) output is an output that the user can elect to use to synchronize the waveforms to

the ultrasound scanner. It is located on the rear panel of the phantom. This is a rarely used feature that can aid

ultrasound researchers as they test new ultrasound machines. Since most users of this phantom do not deal

with that aspect it may be simply ignored.

When used, this output will generate a signal pulse at the very beginning of each test or physiological waveform.

That pulse is 10 milliseconds long and rises from zero volts up to ﬁve volts and then back down. This may be

used to tell the ultrasound researcher exactly when the waveform started and is useful for internal adjustments to

the ultrasound scanner.

Figure 4: Scanhead clamp and articulated arm

About Scanning Angles:

The best angle for most Doppler

ultrasound scans is 60°.

The string target in the

Doppler String Phantom is set

at an angle, so that a scanhead

aimed straight down will be at

a 60° angle to the string. Of

course, you should scan at the

angle that is needed for your

tests.

OPERATING INSTRUCTIONS

Using Constant Speeds

The Doppler String Phantom can be set for constant string speeds ranging from 20 to 200 cm/sec. Constant

speeds are useful for a quick check to verify that your scanner is reporting correct image registration and target

velocity for the scanning angle you’re using. You can also detect false data caused by a broken transducer or a

loose connection.

1. After setting up the Doppler String Phantom, turn on the power switch (located on the back of the controller).

The display reads UP=H2O DOWN=H2O/GLYCOL.

2. If the tank is ﬁlled with water, press UP. If the tank is ﬁlled with velocity-corrected ﬂuid, press DOWN.

(See About Velocity-Corrected Fluid on page 4 for more information.)

The display reads SELECT A FUNCTION.

3. Press CONST. SPEED; then press UP or DOWN to select the desired speed.

Note: Holding down either the UP or DOWN button causes the display to scroll faster.

The motor starts automatically.

4. To reverse the direction of simulated ﬂow, press FLOW REV at any time.

An arrow in the bottom right corner of the display indicates the ﬂow direction.

5. To change functions (for example, to switch from constant speeds to test waveforms), press ESCAPE.

The display reads SELECT A FUNCTION.

Using Preprogrammed Waveforms

The Doppler String Phantom has several preprogrammed waveforms to help you test your ultrasound scanner

under realistic conditions with velocity ﬂuctuations you might expect in a patient. Each waveform has 1000 data

points to provide accurate simulations. The waveforms are divided into two groups: test waveforms and physi-

ological waveforms. Graphs of all the waveforms are included in Appendix A of this User's Guide.

The test waveforms are:

• Sine waves with peak speeds of 100, 150, and 200 cm/sec

• Triangle waves with peak speeds of 100, 150, and 200 cm/sec

• Stepped ramp wave with stops at 1, 20, 40, 60, 80, and 100 cm/sec

The physiological waveforms are:

• Adult common carotid

• Adult aortic

• Adult femoral

• Pediatric umbilical

• Stenotic common carotid

• Pediatric renal

• Pediatric ductus arteriosus

• Pediatric middle cerebral

• Pediatric descending thoracic

After setting up the Doppler String Phantom, turn on the power switch (located on the back of the controller).

The display reads UP=H2O DOWN=H2O/GLYCOL.

1. If the tank is ﬁlled with water, press UP. If the tank is ﬁlled with velocity-corrected ﬂuid, press DOWN.

(See About Velocity-Corrected Fluid on page 4 for more information.)

The display reads SELECT A FUNCTION.

2. Press TEST or PHYSIOLOGICAL to select a waveform group.

The display shows a waveform.

3. Press UP or DOWN to select a waveform. (See Appendix A for graphs of waveforms.)

4. Press EXECUTE to start the motor.

5. To select a different waveform, you may press UP or DOWN at any time while the motor is running.

6. To reverse the direction of simulated ﬂow, press FLOW REV at any time.

An arrow in the bottom right corner of the display indicates the ﬂow direction.

7. To change functions (for example, to switch from physiological waveforms to constant speeds), press

ESCAPE. The display reads SELECT A FUNCTION.

RS-232 INSTRUCTIONS

Introduction

The remote control software allows all of the same functions that are available from the front panel. It is primarily

a serial communications feature for use with automatic testing equipment, but may be used by anyone wanting

to control the phantom for standardized testing. It may be controlled by a laptop, desktop, or a process control

computer.

To establish the link between the Doppler String Phantom controller and your computer, any common RS-232

communications program such as Pro-Comm Plus, Teraterm Plus, Microsoft Hyperterminal, etc., may be used.

The communications program must be set to 9600, N, 8, 1. Use hardware ﬂow control. If your computer does

not have an RS-232 port, you can use an adapter available locally that will convert a standard USB port to RS-

232.

Getting Started

To begin using the remote control feature:

1. Ensure the Doppler String Phantom controller is powered off (rear panel switch).

2. Plug the power cable into the AC Receptacle and into an AC power source. The label on the AC

Receptacle indicates 120 volts. If using with 220 volts, use step down controller (Model 901-C, sold sepa-

rately).

3. Plug the custom RS-232 cord (supplied with the Doppler String Phantom) into the RS-232 receptacle

on the back of the controller.

4. Plug the motor cable into the Drive Motor receptacle on the back of the controller.

5. Start the communications program.

6. Turn on the power on the controller (rear panel switch).

Indice

Altri manuali Cirs Attrezzature industriali

Cirs

Cirs QA Phantom 008Z Manuale utente

Cirs

Cirs ZEUS 008Z Manuale utente

Cirs

Cirs 6DOF ISO Base Manuale utente

Cirs

Cirs ZERDINE 040GSE Manuale utente

Cirs

Cirs 054GS Manuale utente

Manuali Attrezzature industriali popolari di altre marche

ABB

ABB Unifix AD Manuale

Mark 7

Mark 7 Evolution Manuale utente

Husky

Husky HyPET Manuale utente

bora

bora PM-1800 Manuale utente

Grizzly

Grizzly T32428 Manuale utente

Siemens

Siemens 8MF1 Series Manuale utente

ABB

ABB HT610965 Manuale utente

ABB

ABB SafeLink Manuale utente

Phoenix

Phoenix PHX-150 Manuale utente

ABB

ABB A165-L32 Manuale utente

ABB

ABB HT842936 Manuale utente

Rioned

Rioned UrbanJet Manuale utente

Hermetica

Hermetica 10 Series Manuale utente

HORNER

HORNER OEE Solution Manuale utente

Hammerhead

Hammerhead HG375 Manuale utente

SCHUNK

SCHUNK VERO-S NSE-A3 138 Istruzioni utente

ABB

ABB HT566657 Manuale utente

Webasto

Webasto GSE CAN Manuale utente