Basic Operators Manual
158 Pages
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Page 1
S6/S6 Pro Diagnostic Ultrasound System
Regulatory Requirement
This product complies with regulatory requirements of the following European directive 93/42/EEC concerning medical devices.
NOTE: Some options are not available in some model!!
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S6/S6 Pro Diagnostic Ultrasound System
TABLE OF CONTENTS 1
System Safety and Maintenance ...1-1 1.1 1.2 1.3 1.4
Safety Overview ... 1-1 WARNING Symbols ... 1-3 Biological Safety ... 1-4 Scanning Patients and Education... 1-5 1.4.1 Safe Scanning Guideline ... 1-6 1.4.2 Understanding the MI/TI Display ... 1-8 1.5 Environmental Requirements ... 1-13 1.6 Transport and Storage Environmental Requirements ... 1-14 1.7 Electrical Requirements... 1-14 1.8 Electrical Safety... 1-15 1.9 Transducer Maintenance ... 1-16 1.10 System Positioning/Transporting ... 1-22 1.10.1 Moving the System... 1-22 1.10.2 Transporting the System ... 1-23
2
System Specifications ...2-1 2.1 2.2 2.3 2.4 2.5 2.6 2.7
Base System ... 2-1 Application and Contraindication ... 2-7 Image Modes... 2-7 User Interface Control ... 2-8 Probes and Accessories ... 2-9 Physical Specifications ... 2-11 User Interface Function Keys Description ... 2-11 2.7.1 System power up ... 2-11 2.7.2 System Set-Up ... 2-12 2.7.2.1 File Manager ... 2-12 2.7.2.1.1 File manager operation ... 2-13 2.7.2.1.2 Functions of the File manager ... 2-14 2.7.2.2 Facility Name and/or Department Display... 2-16 2.7.2.3 Set Date/Time ... 2-17 2.7.2.4 System Information ... 2-18 2.7.2.5 System Setting ... 2-19 2.7.2.5.1 General Setting ... 2-19 2.7.2.5.2 Set Printer ... 2-20 2.7.2.5.3 Set Calculation Menu... 2-21 2.7.2.5.4 Set Measurement Method... 2-22 2.7.2.5.5 Load Default ... 2-23 2.7.2.5.6 Exit... 2-23 2.7.2.6 DICOM ... 2-23 2.7.2.7 Exit ... 2-23
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2.7.3 EXAM-Key ... 2-24 2.7.4 Mode Select Key (M, B, THI, CDI, DPI, PW, CW) ... 2-24 2.7.5 PATIENT Key / Patient Data Entry window ... 2-27 2.7.6 Save Key ... 2-30 2.7.7 Video Print Key ... 2-31 2.7.8 PRINT Key... 2-31 2.7.9 M-Tuning Key ... 2-31 2.7.10 4D Key... 2-32 2.7.11 B/M/C/D Gain Knob ... 2-32 2.7.12 Color Invert (Finv-key) ... 2-32 2.7.13 CLR Key ... 2-33 2.7.14 DEL key ... 2-33 2.7.15 ARROW Key... 2-33 2.7.16 BDMK Key (Body Marker Key) ... 2-34 2.7.17 ANNOT Key ... 2-35 2.7.18 ZOOM key ... 2-36 2.7.19 Report key ... 2-36 2.7.20 DIST Key ... 2-37 2.7.21 CALC Key... 2-38 2.7.22 ELLIPSE Key... 2-38 2.7.23 TRACE Key ... 2-38 2.8 Functional Manipulation Control ... 2-39 2.8.1 Trackball ... 2-39 2.8.2 Set Key ... 2-40 2.8.3 FREEZE Key ... 2-40 2.8.4 UPDATE Key ... 2-41 2.8.5 AUDIO Volume Knob ... 2-41 2.8.6 Time Gain Compensation (TGC) slider... 2-41 2.8.7 MENU Key... 2-42 2.8.8 QUAD DISPLAY ... 2-42 2.8.9 DUAL Key ... 2-43 2.8.10 L/R Key... 2-45 2.8.11 UP/DOWN Key ... 2-45 2.8.12 PRF Paddle ... 2-45 2.8.13 BASELINE Paddle ... 2-45 2.8.14 FILTER ... 2-46 2.8.15 FOCUS Paddle ... 2-46 2.8.16 DEPTH Paddle ... 2-46 2.9 Cine Playback Mode... 2-47 2.10 Soft-Menu Controls - Introduction ... 2-48 2.10.1 Trapezoid mode... 2-48 2.10.2 Display format... 2-48 2.10.3 Real-time triplex... 2-48 P/N 4701-0082-01A BASIC Operator‟s Manual
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2.11
3
User Define Exam Setting ... 2-49 2.11.1 Activating the Command ... 2-49 2.11.2 Naming the User Exam Icon ... 2-49 2.11.3 Delete User Defined Exam Icon ... 2-51
B Mode...3-1 3.1
B-mode Operation ... 3-1 3.1.1 B GAIN ... 3-1 3.1.2 DEPTH ... 3-2 3.1.3 FOUCS... 3-2 3.1.4 TGC... 3-3 3.1.5 PANORAMIC Key (in B mode only)... 3-4 3.2 B-mode Menu ... 3-6 3.2.1 FOCAL NUMBER ... 3-7 3.2.2 FOCAL SPAN ... 3-7 3.2.3 ECG (optional) ... 3-7 3.2.4 TISSUE CHARACTERISTICS (TC) INDEX ... 3-9 3.2.5 DYNAMIC RANGE (DYN) ... 3-10 3.2.6 GSC (also in Freeze state) ... 3-11 3.2.7 PERSIST ... 3-11 3.2.8 CHROMA (also in Freeze state) ... 3-11 3.2.9 SEC. WIDTH ... 3-11 3.2.10 SEC. POS ... 3-11 3.2.11 LINE DENSITY... 3-11 3.2.12 BIOPSY GUIDE (only for certain probes) ... 3-12 3.2.13 COMPOUND ... 3-13 3.2.14 FREQUENCY... 3-13 3.2.15 LT← → RT (also in Freeze state) ... 3-13 3.2.16 IMAGE PROCESSING... 3-13 3.2.17 μScan ... 3-13 3.2.18 POWER% ... 3-13 3.2.19 TRAPEZOID (only for linear array probe)... 3-14 3.3 THI Mode... 3-14
4
M Mode ...4-1 4.1 4.2 4.3
M Sample-line Position... 4-1 Activation of M-mode... 4-1 M-mode Operation ... 4-2 4.3.1 GAIN ... 4-2 4.3.2 TGC... 4-2 4.4 B+M mode Menu ... 4-3 4.4.1 STEER M ... 4-4 4.4.2 DISPLAY FORMAT (also in Freeze state) ... 4-4 4.4.3 VIDEO INVERT (M active, also in Freeze state) ... 4-7 4.4.4 M PROCESS (M active) ... 4-7 P/N 4701-0082-01A BASIC Operator‟s Manual
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4.5
5
CDI+M mode Menu ... 4-7 4.5.1 BASELINE ... 4-8 4.5.2 FLOW INVERT(also in Freeze state)... 4-9
PW and CW Mode ... 5-1 5.1 5.2 5.3
PW Sample Volume Adjustment ... 5-1 Activation of PW/CW Mode ... 5-2 PW/CW Mode Operation ... 5-3 5.3.1 PW GAIN ... 5-3 5.3.2 BASELINE ... 5-3 5.3.3 FILTER ... 5-4 5.3.4 PRF ... 5-4 5.3.5 HPRF... 5-4 5.4 PW/CW Mode Menu ... 5-5 5.4.1 DYN ... 5-7 5.4.2 UP/DOWN ... 5-7 5.4.3 2D-REFRESH... 5-7 5.4.4 DISPLAY FORMAT (also in Freeze state) ... 5-7 5.4.5 STEER ANGLE... 5-8 5.4.6 SWEEP SPEED (also in Freeze state) ... 5-8 5.4.7 BASELINE ... 5-8 5.4.8 ANGLE CORRECT... 5-9 5.4.9 WALL FILTER (WF) ... 5-9 5.4.10 PW← → CW... 5-9 5.5 PW + B + Color Information (Triplex Mode) ... 5-10
6
CDI Mode ... 6-1 6.1 6.2
CDI Sample-Box Adjustment ... 6-1 CDI Mode Operation ... 6-2 6.2.1 GAIN... 6-2 6.2.2 BASELINE ... 6-2 6.2.3 FOCUS ... 6-2 6.2.4 PRF ... 6-2 6.2.5 DEPTH ... 6-2 6.2.6 FILTER ... 6-3 6.3 CDI Mode Menu... 6-3 6.3.1 PERSIST ... 6-4 6.3.2 C MAP (also in Freeze state)... 6-4 6.3.3 B- REJECT (also in Freeze state ) ... 6-4 6.3.4 FLOW INVERT (also in Freeze state)... 6-4 6.3.5 LINE DENSITY ... 6-4
7
DPI Mode ... 7-1 7.1 7.2
DPI Operation ... 7-1 DPI Menu... 7-1
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TDI Mode...8-1 8.1 8.2 8.3
9
Freeze Mode Menu Options ...9-1 9.1 9.2 9.3 9.4 9.5 9.6 9.7
10
TDI Sample-Box Adjustment ... 8-2 TDI Operation ... 8-2 TDI Menu... 8-2 FRAME BY FRAME... 9-1 SWEEP SPEED (Doppler active) ... 9-1 LOOP SPEED (Doppler in-active)... 9-1 VIDEO INVERT (Doppler active) ... 9-2 PLAY/STOP (Doppler in-active)... 9-2 START ... 9-2 END... 9-2
3D Mode...10-1 10.1
Introduction... 10-1 10.1.1 3D Sample-Box Adjustment ... 10-3 10.2 Menu Options ... 10-4 10.2.1 Clear ROI ... 10-4 10.2.2 RESTORE ROI... 10-4 10.2.3 CROP ... 10-5 10.2.4 ROI MODE ... 10-5 10.2.5 HIDE ROI ... 10-5 10.2.6 RENDER MODE ... 10-5 10.2.7 AUTO ROTATE ... 10-7 10.2.8 TRACE CUT... 10-8 10.2.9 UNDO CUT ... 10-10 10.2.10 CLIP PLANE ... 10-10 10.2.11 OPACITY OFFSET... 10-10 10.2.12 OPACITY SLOPE... 10-11 10.2.13 SCAN METHOD... 10-11 10.2.14 Z-SCALE ... 10-12 10.2.15 Z-ANGLE ... 10-12 10.2.16 DUAL DISPLAY... 10-13 10.2.17 QUAD DISPLAY ... 10-14 10.2.18 FULL DISPLAY... 10-15 10.3 ROI Manipulation... 10-16 10.4 Sectional View Traversal ... 10-16
11
The Probe/ Transducer ... 11-1 11.1 11.2
General Description and Specifications ... 11-1 Operating Instructions for the Probes ... 11-1 11.2.1 Inspection ... 11-1 11.2.2 WARNING ... 11-2 11.2.3 Connecting and Disconnecting a Transducer ... 11-2
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11.2.4 Cleaning and Disinfecting ... 11-3 11.2.5 Scanning the Patient ... 11-4 11.3 Operation introduction for 6V1/6V3... 11-4 11.3.1 Cleaning and Disinfecting 6V1/6V3 Probe... 11-4 11.3.2 Operating 6V1/6V3 probe ... 11-6
12
System Maintenance ... 12-1 12.1
General probe cleaning and disinfecting... 12-1 12.1.1 Cleaning ... 12-1 12.1.2 Disinfecting ... 12-2 12.2 Acoustic Intensity Information ... 12-2 12.3 System Service method ... 12-3 12.4 Service responsibility ... 12-3 12.5 Contact information of the Service Department: ... 12-3
Appendix A Descriptions of the WARNING signs... A-1 Appendix B The information of Representatives... B-1
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1 System Safety and Maintenance 1.1 Safety Overview This section discusses measure to ensure the safety of both the operator and patient. To ensure the safety of both operator and patient, please read the relevant details in this chapter carefully before operating this system. Disregarding the WARNINGs or violation of relevant rules may result in personal injury or even loss of life for operator or patient. Users should observe the following preCAUTIONs:
This system complies with Type BF general equipment, and the EN60601-1 standard. Please follow Section 1. ―System Safety‖ in the user‘s manual to use this system properly.
Do not modify this system in any way. Necessary modifications must be made only by the manufacturer or its designated agents.
This system has been fully adjusted at the factory. Do not adjust any fixed adjustable parts.
In the event of a malfunction, turn off the system immediately and inform the manufacturer or its designated agents.
The power cable of the system should only be connected to a grounded power socket. Do not remove the ground cable for any reason.
Only connect this system, either electronically or mechanically, with devices that comply with the EN60601-1 standard. Recheck the leakage current and other safety performance indices of the entire system to avoid potential system damage caused by leakage from a current superposition.
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The system does not incorporate any specialized protective measures in the event it is configured with high-frequency operation devices. The operator should use CAUTION in these types of applications.
The system should be installed only by personnel authorized by the manufacturer. Do not attempt to install the system yourself.
Only an authorized service engineer may perform maintenance.
Only a qualified operator, or someone under qualified supervision, should use the system.
Do not use this system in the presence of flammable substances or an explosion may occur.
Do not continuously scan the same part of a patient or expose the patient to prolonged scanning. Doing so may harm the patient.
When using the system for ultrasound testing, use only qualified ultrasound gel that complies with system standards.
Do not use the switch at the back of the unit for normal shut down. Always use the power-on button in the keyboard area
Do not unplug probe when the system is in active operation. Doing so may damage the probe. Always go to EXAM screen when need to remove the probe.
To prevent from arm or neck injury, the operator should not stay at the same position for too long during patient scanning without taking break.
Do not put liquid on top of the main unit.
The unit has build-in screen saver to avoid the tic mark on the display. It is not recommended to constantly turning on and off the unit.
To dispose of this product properly, please call your local service department.
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1.2 WARNING Symbols
1 Type BF Equipment
2 Dangerous voltage
3 Attention
4
Off (power: disconnection from the main power)
5 On (power: connection to the main power)
6
Equi-potentiality
7 Alternating current
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1.3 Biological Safety This product, as with all diagnostic ultrasound equipment, should be used only for valid reasons and should be used both for the shortest period of time and at the lowest power settings necessary (ALARA As Low As Reasonably Achievable) to produce diagnostically acceptable images. The AIUM offers the following guidelines:
Clinical Safety Quoted from AIUM Approved March 26, 1997 Diagnostic ultrasound has been in use since the late 1950s. Given its known benefits and recognized efficacy for medical diagnosis, including use during human pregnancy, the American Institute of Ultrasound in Medicine herein addresses the clinical safety of such use: There are no confirmed biological effects on patients or instrument operators caused by exposures from present diagnostic ultrasound instruments. Although the possibility exists that such biological effects may be identified in the future, current data indicate that the benefits to patients of the prudent use of diagnostic ultrasound outweigh the risks, if any that may be present.
Heating: Elevating tissue temperature during obstetrical examinations creates medical concerns. At the embryo development stage, the rise in temperature and the length of time exposed to heat combine to determine potential detrimental effects. Exercise CAUTION particularly during Doppler/Color exams. The Thermal Index (TI) provides a statistical estimate of the potential temperature elevation (in centigrade) of tissue temperature. Three forms of TI are available: TIS, for soft tissue exposures; TIB, for instances when bone lies near the beam focus; and TIC, for the heating of bone situated close to the transducer.
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Cavitation: Cavitation may occur when sound passes through an area that contains a cavity, such as a gas bubble or air pocket (in the lung or intestine, for example). During the process of cavitation, the sound wave may cause the bubble to contract or resonate. This oscillation may cause the bubbles to explode and damage the tissue. The Mechanical Index (MI) has been created to help users accurately evaluate the likelihood of cavitation and the related adverse effects.
1.4 Scanning Patients and Education The Track-3 or IEC60601-2-37 output display standard allows users to share the responsibility for the safe use of this ultrasound system. Follow these usage guidelines for safe operation:
In order to maintain proper cleanliness of the transducers, always clean them between patients.
Always use a new disinfected sheath on all EV/ER probes during every exam.
Continuously move the probe, rather than staying in a single spot, to avoid elevated temperatures in one part of the patient‘s body.
Move probe away from the patient when not actively scanning.
Understand the meaning of the TI, TIS, TIB, TIC, and MI output display, as well as the relationship between these parameters and the thermal/cavitation bioeffect to the tissue.
Expose the patient to only the very lowest practical transmit powerlevels for the shortest possible time to achieve a satisfactory diagnosis (ALARA - As Low As Reasonably Achievable).
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1.4.1
Safe Scanning Guideline
1. Ultrasound should only be used for medical diagnosis and only by trained medical personnel. 2. Diagnostic ultrasound procedures should be done only by personnel fully trained in the use of the equipment, in the interpretation of the results and images, and in the safe use of ultrasound (including education as to potential hazards). 3. Operators should understand the likely influence of the machine controls, the operating mode (e.g. B-mode, color Doppler imaging or spectral Doppler) and probe frequency on thermal and cavitation hazards. 4. Select a low setting for each new patient. Output should only be increased during the examination if penetration is still required to achieve a satisfactory result, and after the Gain control has been moved to its maximum value. 5. Maintain the shortest examination time necessary to produce a useful diagnostic result. 6. Do not hold the probe in a fixed position for any longer than is necessary. It should be removed from the patient whenever there is no need for real-time imaging or spectral Doppler acquisition. The freeze frame and Cine loop capabilities allow images to be reviewed and discussed without exposing the patient to continuous scanning. 7. Do not use endo-cavity probes if there is noticeable self heating of the probe when operating in the air. Although applicable to any probe, take particular care during trans-vaginal exams during the first eight weeks of gestation. 8. Take particular care to reduce output and minimize exposure time of an embryo or fetus when the temperature of the mother is already elevated. 9. Take particular care to reduce the risk of thermal hazard during diagnostic ultrasound when exposing: an embryo less than eight weeks after gestation; or the head, brain or spine of any fetus or neonate.
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10. Operators should continually monitor the on-screen thermal index (TI) and mechanical index (MI) values and use control settings that keep these settings as low as possible while still achieving diagnostically useful results. In obstetric examinations, TIS (soft tissue thermal index) should be monitored during scans carried out in the first eight weeks after gestation, and TIB (bone thermal index) thereafter. In applications where the probe is very close to bone (e.g. trans-cranial applications), TIC (cranial thermal index) should be monitored.
MI> 0.3
There is a possibility of minor damage to neonatal lung or intestine. If such exposure is necessary, reduce the exposure time as much as possible.
MI> 0.7
There is a risk of cavitation if an ultrasound contrast agent containing gas micro-spheres is being used. There is a theoretical risk of cavitation without the presence of ultrasound contrast agents. The risk increases with MI values above this threshold.
TI> 0.7
The overall exposure time of an embryo or fetus should be restricted in accordance with Table 2.4.1 below as a reference:
TI
Maximum exposure time (minutes)
0.7
60
1.0
30
1.5
15
2.0
4
2.5
1
Table 2.4.1 Maximum recommended exposure times for an embryo or fetus
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11. Non-diagnostic use of ultrasound equipment is not generally recommended. Examples of non-diagnostic uses of ultrasound equipment include repeated scans for operator training, equipment demonstration using normal subjects, and the production of souvenir pictures or videos of a fetus. For equipment of which the safety indices are displayed over their full range of values, the TI should always be less than 0.5 and the MI should always be less than 0.3. Avoid frequent repeated exposure of any subject. Scans in the first trimester of pregnancy should not be carried out for the sole purpose of producing souvenir videos or photographs, nor should their production involve increasing the exposure levels or extending the scan times beyond those needed for clinical purposes. 12. Diagnostic ultrasound has the potential for both false positive and false negative results. Misdiagnosis is far more dangerous than any effect that might result from the ultrasound exposure. Therefore, diagnostic ultrasound should be performed only by those with sufficient training and education.
1.4.2
Understanding the MI/TI Display
Track-3 follows the Output Display Standard for systems which include fetal Doppler applications. The acoustic output will not be evaluated on an application-specific basis, but the global maximum de-rated Ispta must be ≤ 720 mW/cm2 and either the global maximum MI must be ≤ 1.9 or the global maximum de-rated Isppa must be ≤ 190 W/cm2. An exception is for ophthalmic use, in which case the TI = max (TIS_as, TIC) is not to exceed 1.0; Ispta.3 ≤50mW/cm2, and MI ≤ 0.23. Track-3 gives the user the freedom to increase the output acoustic power for a specific exam, and still limit output acoustic power within the global maximum de-rated Ispta ≤ 720 mW/cm2 under an Output Display Standard. For any diagnostic ultrasonic systems, Track-3 provides an Output Indices Display Standard. The diagnostic ultrasound systems and its operator‘s manual contain the information regarding an ALARA (As Low As Reasonably Achievable) education program for the clinical end-user and the acoustic output indices, MI and TI. P/N 4701-0082-01A BASIC Operator‟s Manual
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The MI describes the likelihood of cavitation, and the TI offers the predicted maximum temperature rise in tissue as a result of the diagnostic examination. In general, a temperature increase of 2.5oC must be present consistently at one spot for 2 hours to cause fetal abnormalities. Avoiding a local temperature rise above 1oC should ensure that no thermally induced biologic effect occurs. When referring to the TI for potential thermal effect, a TI equal to 1 does not mean the temperature will rise 1 degree C. It only means an increased potential for thermal effects can be expected as the TI increases. A high index does not mean that bioeffects are occurring, but only that the potential exists and there is no consideration in the TI for the scan duration, so minimizing the overall scan time will reduce the potential for effects. These operator control and display features shift the safety responsibility from the manufacturer to the user. So it is very important to have the Ultrasound systems display the acoustic output indices correctly and the education of the user to interpret the value appropriately.
RF: De-rating factor In Situ intensity and pressure cannot currently be measured. Therefore, the acoustic power measurement is normally done in the water tank, and when soft tissue replaces water along the ultrasound path, a decrease in intensity is expected. The fractional reduction in intensity caused by attenuation is deNOTEd by the de-rating factor (RF),
RF = 10 (-0.1 a f z) Where a is the attenuation coefficient in dB cm-1 MHz-1, f is the transducer center frequency, and z is the distance along the beam axis between the source and the point of interest. De-rating factor RF for the various distances and frequencies with attenuation coefficient 0.3dB cm-1 MHz-1 in homogeneous soft tissue is listed in the following table. An example is if the user uses 7.5MHz frequency, the power will be attenuated by .0750 at 5cm, or 0.3x7.5x5=-11.25dB. The De-rated Intensity is also referred to as ‗.3‘ at the end (e.g. Ispta.3).
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Tissue Model: Tissue temperature elevation depends on power, tissue type, beam width, and scanning mode. Six models are developed to mimic possible clinical situations.
Soft tissue: Describes low fat content tissue that does not contain calcifications or large gas-filled spaces.
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Scanned: (auto-scan): Refers to the steering of successive burst through the field of view, e.g. B and color mode.
UnScanned: Emission of ultrasonic pulses occurs along a single line of sight and is unchanged until the transducer is moved to a new position. For instance, the PW, CW and M mode.
TI: TI is defined as the ratio of the In Situ acoustic power (W.3) to the acoustic power required to raise tissue temperature by 1oC (Wdeg),
TI = W.3/Wdeg Three TIs corresponding to soft tissue (TIS) for abdominal; bone (TIB) for fetal and neonatal cephalic; and cranial bone (TIC) for pediatric and adult cephalic, have been developed for applications in different exams. An estimate of the acoustic power in milli-watts necessary to produce a 1oC temperature elevation in soft tissue is:
Wdeg = 210/fc, for model 1 to 4, where fc is the center frequency in MHz.
Wdeg = 40 K D for model 5 and 6, where K (beam shape factor) is 1.0, D is the aperture diameter in cm at the depth of interest. MI: Cavitation is more likely to occur at high pressures and low frequencies in pulse ultrasound wave in the tissue, which contains the bubble or air pocket (for instance, the lung, intestine, or scan with gas contrast agents). The threshold under optimum conditions of pulsed ultrasound is predicted by the ratio of the peak pressure to the square root of the frequency.
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MI = Pr‟ / sqrt(fc) Pr’ is the de-rated (0.3) peak rare-fractional pressure in Mpa at the point where PII is the maximum, and fc is the center frequency in MHz. PII is the Pulse Intensity Integral that the total energy per unit area carried by the wave during the time duration of the pulse. The peak rare-fractional pressure is measured in hydrophone maximum negative voltage normalized by the hydrophone calibration parameter.
Display Guideline: For different operation modes, different indices must be displayed. However, only one index needs to be shown at a time. Display is not required if maximum MI is less than 1.0 for any setting of the operating mode, or if maximum TI is less than 1.0 for any setting of the operating mode. For TI, if the TIS and TIC are both greater than 1.0, the scanners need not be capable of displaying both indices simultaneously. If the index falls below 0.4, no display is needed. The display increments are no greater than 0.2 for index value less than one and no greater than 1.0 for index values greater than one (e.g. 0.4, 0.6, 0.8, 1, 2, 3).
Display and Report in Different Mode For B-Scan Mode Only display and report MI, and start from 0.4 if maximum MI > 1.0 For Color Mode Only display and report TIS or TIB and start from 0.4 if maximum TI > 1.0 For Doppler Mode Only display and report TIS or TIB and start from 0.4 if maximum TI > 1.0
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S6/S6 Pro Diagnostic Ultrasound System Below is a simple guideline for the user when TI exceeds one limit exposure time to 4(6-TI) minutes based on the ‗National Council on Radiation Protection. Exposure Criteria for Medical Diagnostic Ultrasound: I. Criteria Based on Thermal Mechanisms. Report No.113 1992‘: Operator Control Features: The user should be aware that certain operator controls may affect the acoustic output. It is recommended to use the default (or lowest) output power setting and compensate using Gain control to acquire an image. Other than the output power setting in the soft-menu, which has the most direct impact on the power; the PRF, image sector size, frame rate, depth, and focal position also slightly affect the output power. The default setting is normally around 70% of the allowable power depending on the exam icon.
1.5 Environmental Requirements The following environmental conditions are within system tolerances for operation: Relative Humidity:
30%~75% non-condensing
Temperature:
10℃ ~ 40℃
Atmosphere Pressure:
700~1060hPa
Strong radiation sources or powerful electromagnetic waves (e.g. electromagnetic waves from radio broadcasting) may result in image ghosting or noise. The system should be isolated from such radiation sources or electromagnetic waves.
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