Terason t3000, Руководство пользователя

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Chapter 9 - Performing Medical Procedures Verifying the Alignment
Terason t3000 / Echo Ultrasound System User Guide 224
The target distance is measured in centimeters and is calculated as the distance from the
bottom of the clip to the patients’ skin (as indicated by the top of the needle guide lines)
plus the distance from the skin line to the target as indicated by the location of the green
target indicator.
To turn off the needle guides, click .
When you insert the needle, it should be located near the center of the guidelines. If the
needle appears outside of the lines, verify that you have selected the appropriate needle
guide on the I.Q. tab. If you have, stop the procedure immediately and contact a Terason
representative.
Verifying the Alignment
To ensure that the transducer and biopsy attachment are accurately aligned, and that the
needle path is within the stated specification, Terason strongly recommends that you
periodically conduct a simulation test. To conduct this test, you must have an assembled
biopsy bracket, needle guide, and a water tank.
Use 2D to verify the alignment, and do not use the Zoom tool. The needle guides do not
show in zoomed displays.
To verify the alignment of the transducer and biopsy attachment, complete these steps:
1. If the needle guides are not visible, select
View > Needle Guide Display > Guide Lines
.
The biopsy guides appear in the Image Display window.
2. From the Needle Guide menu on the I.Q. tab, select the needle guide that you want to
use for the test.
3. Assemble the bracket, needle guide clip, and gauge insert pin as described in
Assembling the Bracket and Guide on page 222.
4. Insert the needle into the gauge insert pin.
5. Place the needle in a water tank, ensuring that you do not touch the side or bottom of
the water tank (which can bend the needle and produce an inaccurate reading).
6. Verify that the needle appears clearly between the two guidelines.
7. Remove the needle from the biopsy bracket and safely dispose of the needle.
8. Detach the biopsy bracket from the transducer.
Setting the Error Correction
The Terason software lets you make small adjustments to the positioning of the needle
guides (used in biopsies) and the insertion grid (used for cryoablation or brachytherapy).
When you select
Needle Guide Error Correction
from the Tools menu, the Terason software
displays the correct dialog box for the current transducer.