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GE Vivid 7 User Manual

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    							Contrast Imaging
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    Running RTMC
    The RTMC Contrast application works only with the M3S and 
    3S probes.
    To select RTMC ap-
    plication without 
    changing the cur-
    rent probe, press 
    APPL. on the control 
    panel.
    1. Press PROBE on the control panel.
    A list of the connected probes is displayed.
    2. Trackball to the desired probe supporting the RTMC 
    application.
    The Application menu for the selected probe is listed.
    3. Trackball to Real Time MC application.
    4. Press 
    SELECT to launch the application.
    5. Press the assignable 
    ANGIO.
    6. Adjust the Active Gain from the Control Panel.
    7. Acquire the baseline images.
    To go back to single 
    screen, press 
    SIMULTANEOUS 
    again.
    8. Press STORE to save the baseline acquisition.
    9. If desired, press the 
    SIMULTANEOUS assignable to prompt a 
    dual screen for side by side display 2D B-mode and 2D 
    Angio mode.
    The contrast solu-
    tion should be pre-
    pared just before 
    injection.10. Prepare the Contrast agent as described by the 
    manufacturer.
    11. Administrate the contrast agent.
    12. Press 
    FLASH when the contrast agent has reached a stable 
    level (infusion) or just before peak (bolus injection).
    The contrast agent is destroyed in the myocardium.
    13. Wait approximately ten heartbeats observing contrast 
    wash-in.
    14. Press 
    FREEZE.
    15. Press 
    CINELOOP.
    See also page 62 
    about cineloop oper-
    ation.16. Select Left marker and Right marker frames to define the 
    cineloop to transfer.
    Storage of real time 
    data takes consider-
    able space digitally. 
    Be aware of this 
    when selecting 
    more than one 
    cineloop for storage.17. Press STORE to save the contrast acquisition. 
    						
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    Optimizing RTMC
    RTMC is by default scanning in low power mode to avoid 
    destruction of slow moving contrast in the myocardium. This 
    setting is required for real time contrast imaging, but is sub-
    optimal for tissue imaging.
    •  To obtain good baseline images, the power may be 
    increased prior to contrast injection, but must be reset to its 
    default value before contrast injection or infusion to avoid 
    destruction of the contrast agent.
    •  If the patient is difficult to image, the power may be slightly 
    increased to get sufficient signal from the contrast agent. 
    						
    							Cardiac Measurement and Analysis
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    Chapter 6 
    Cardiac Measurement and 
    Analysis
    This chapter includes the following information:
    • Introduction  ................................................................................... ..  210
    • The Assign and Measure modality  .............................................. ..  211
    • Starting the Assign and Measure modality ............................... 211
    • Entering a study and performing measurements  ..................... 213
    • Measure and Assign modality  ..................................................... ..  215
    • Starting the Measure and Assign modality ............................... 215
    • Performing measurements  ....................................................... 216
    • Post-measurement assignment labels  ..................................... 227
    • Controlling the Measurement result table display ..................... ..  229
    • Minimizing the Measurement result table ................................. 229
    • Moving the Measurement result table  ...................................... 229
    • Worksheet ...................................................................................... ..  230
    • Overview  .................................................................................. 230
    • Using Worksheet  ...................................................................... 230 
    						
    							Cardiac Measurement and Analysis
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    Introduction
    The Vivid 7/Vivid 7 PRO Ultrasound unit provides functionality 
    for two measurement conventions:
    A study is a set of 
    related measure-
    ments, or measure-
    ments that are 
    logically grouped 
    together. The mea-
    surements in a 
    study are some-
    times used in a for-
    mula to calculate 
    new parameters 
    (e.g. biplane volume 
    with EF, SV and 
    CO).• Assign and Measure (Measure Protocols): the user 
    selects a study consisting in a set of pre-labeled 
    measurements related to the active scanning mode and 
    clinical application. The user is prompted through the 
    measurements in the order of the measurements labels. 
    This convention is started from the 
    MEASURE button on the 
    control panel. A set of tools is implemented to make the 
    measurement process as fast and easy as possible for the 
    user:
    •  The user is guided through the study: an auto-sequence 
    functionality automatically selects the next 
    measurement in a study.
    •  The selected measurement is highlighted in the 
    Measurement menu.
    •  The performed measurement is indicated in the 
    Measurement menu.
    • The 
    MENU key on the control panel enables quick access 
    to the Measurement menu.
    The studies and their parameters are user-configurable. The 
    user can create its own studies containing the relevant 
    measurements only (see page 406).
    • Measure and Assign (Free style): the user performs a 
    measurement and assigns a label. This convention is 
    started either from 
    MEASURE or CALIPER button on the 
    Control panel.
    CAUTIONOnly assigned measurements will be saved. Measurements 
    without assignment will be lost when scanning is resumed. 
    						
    							Cardiac Measurement and Analysis
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    The Assign and Measure modality
    In this measurement modality, the user selects a study 
    consisting in a set of related pre-labelled measurements.
    Star ting the Assign and Measure 
    modality
    1. Press MEASURE on the control panel.
    The Measurement Menu is displayed in the Parameters 
    window (see example Figure 6-3).
    The trackball cursor is in the scanning window, ready for 
    starting measurement.
    In Freeze mode, the 
    UPDATE MENU key 
    on the trackball area 
    has the same func-
    tion as the 
    MENU 
    key.
    2. For fast access to the Measurement menu, press MENU.
    The cursor is moved to the Measurement menu. After 
    selection of a measurement the cursor is automatically 
    moved back to the scanning window, ready for 
    measurement.
     Figure 6-1: Launching the Measurement conventions
    1. Menu: fast access to 
    the Measurement 
    menu (when in 
    measure mode)
    2. Measure: assign and 
    measure
    3. Caliper: measure 
    and assign (see 
    page 215) 
    						
    							Cardiac Measurement and Analysis
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     Figure 6-2: Example of a measurement study
    1. Active application
    2. Study
    3. Selected study
    4. Opened study
    5. Measurements 
    related to the area 
    study for the cardiac 
    application 
    						
    							Cardiac Measurement and Analysis
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    Entering a study and perfor ming 
    measurements
    1. Press MEASURE on the front panel to enter the Assign and 
    Measure modality.
    The Measurement menu with a list of studies is displayed 
    in the Parameters window (see example Figure 6-3).
    When entering the Measurement mode for the first time, 
    the Caliper tool is selected by default. When re-entering 
    the Measurement mode, the first measurement in the 
    actual study that has not been performed is selected by 
    default.
    To perform a measurement from another 
    study:
    Alternative: Press 
    MENU to access to 
    the Measurement 
    menu and track-
    ball to the actual 
    study
    1. Trackball to the required study.
    2. Press 
    SELECT on the trackball area.
    The study folder is opened displaying the measurements 
    related to this study. Other related studies may also be 
    available from within the study.
    3. Trackball to the measurement to perform.
    4. Press 
    SELECT on the trackball area to activate the 
    measurement tool.
    The cursor is moved back to the scanning window.
    5. Perform the measurement.
    Completed measurements are marked with a check mark 
    Figure 6-3).
    When the measurement operation is completed the next 
    measurement on the list is automatically selected.
    To skip a measurement in a study
    Alternative: Press 
    MENU to access to 
    the Measurement 
    menu and track-
    ball to the actual 
    study
    1. Trackball to the desired measurement
    2. Press 
    SELECT to activate the measurement tool. 
    						
    							Cardiac Measurement and Analysis
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     Figure 6-3: Display of a performed measurement (example)
    1. Performed 
    measurement
    2. Next measurement 
    is automatically 
    selected 
    						
    							Cardiac Measurement and Analysis
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    Measure and Assign modality
    In this measurement modality, the user performs a 
    measurement and assign a label.
    Star ting the Measure and Assign 
    modality
    Alternative: Press 
    CALIPER on the con-
    trol panel and select 
    the measurement 
    tool from the as-
    signables.
    1. Press MEASURE on the control panel.
    The Measurement Menu is displayed in the Parameters 
    window (see example Figure 6-4).
    2. If not selected, trackball to the actual measurement tool.
    3. Press 
    SELECT on the trackball area to activate the 
    measurement tool.
    The cursor is moved back to the scanning window, ready 
    for measurement.
     Figure 6-4: The 2D Mode Measurement tools (Cardiac application)
    CAUTIONOnly assigned measurements will be saved.
    1.  Measurement tools 
    						
    							Cardiac Measurement and Analysis
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    Perfor ming measurements
    2D Measurements
    2D Length measurements
    1. Generate the 2D image.
    2. Press 
    FREEZE to stop the cineloop.
    Alternative: Press 
    CALIPER on the con-
    trol panel and press 
    CALIPER assignable.
    3. Press MEASURE on the Control Panel.
    4. Select Caliper in the Measurement Menu (see Figure 6-2).
    5. Trackball the cursor to the start point of the measurement.
    6. Press 
    SELECT to anchor the start point of the measurement.
    See the Status bar 
    to get the next step 
    to perform.7. Trackball the cursor to the measurement end point.
    The current distance value is displayed in the 
    Measurement result table and is instantaneously updated 
    when moving the cursor.
    The measurement 
    display color on the 
    2D image changes 
    from green to red af-
    ter completion of 
    the measurement.8. Press SELECT to anchor the end point of the measurement.
    The measurement result is displayed in the Measurement 
    result table.
    9. To assign a label to the measurement, see page 227.
    10. Repeat steps 5 through 8 to make additional length 
    measurements.
    The measurements 
    displayed on the 2D 
    image and the cor-
    responding results 
    are numbered.2D length measurement ratio
    1. Generate the 2D image.
    2. Press 
    FREEZE to stop the cineloop.
    3. Press 
    MEASURE on the Control Panel.
    Alternative: Press 
    CALIPER and DIST 
    RATIO assignable.
    4. Select Dist. ratio in the Measurement Menu (see Figure 6-
    2).
    5. Perform two length measurements as described in steps 5 
    through 8 in the above section.
    The measurement results including the ratio (%) of the two 
    measured lengths are displayed in the Measurement result 
    table.
    Editing 2D Length measurements
    1. Trackball the cursor to one of the anchor points of the 
    measurement to modify.
    2. Double-click the 
    SELECT key to select the anchor point.
    The selected marker turns green and is unanchored.
    3. With the Trackball, reposition the marker.
    4. Press 
    SELECT to anchor. 
    						
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