6 Image Acquisition
Operator’s Manual 6 - 57
Tap [Axial]/[Coronal]/[Sagittal] to toggle the top-left reference plane.
2. Press <Cursor> to show the cursor. Mark on the axial plane (top-right)/coronal plane (bottom-
left)/sagittal plane (bottom-right). The procedures to make marks are given below:
NOTE:
• The Ultrasound System adds 3-dimesnsional sphere mark to CT/MR/PET/Freehand
volume data. Set the target mark based on your sphere center and sphere radius.
• At least two CT/MR/PET/Freehand planes should be marked when performing manual
tracing.
a. Select “Manual tracing” or “Circle tracing” in the “Mark” drop-down list.
Circle tracing: Press <Set> to locate the center at the core of the lesion. Roll the trackball
to adjust the radius. Envelop the tumor or the lesion with the circle. Double press <Set> to
complete adding the mark.
Manual tracing: roll the trackball to manually envelop the lesion. Rotate the <4D> key to
scroll the CT/MR/PET/Freehand image and continue to mark the lesions. After lesions of
all the desired CT/MR/PET/Freehand planes are marked, tap [Accept Slice Trace] to add
marks.
b. Rotate [Ablative Margin] to add the ablative margin for this mark. See also “Ablative
Margin” description below.
NOTE:
• The tumor infiltrates the neighboring organs, which leads to the tumor boundary
unclear. The ablation scope is larger than practical tumor boundary’s. The enlargement
scope is called ablative margin.
• The ablative margin is about setting a safe boundary on the lesion which is already
marked. It also implies another boundary mark outside the lesion mark on image.
• The ablative margin reminds of the narrowest boundary for surgical ablation. It takes
significant effect on ablating the tumor.
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