34
REVIEWING A
-
SCAN VIDEOS AND MEASUREMENTS
REVIEW WAVEFORM VIDEOS
Waveform videos captured during the exam can be reviewed frame by frame by pressing the
←
and
→
keys on the keyboard or by moving the slider along the bottom of the screen. If the
currently displayed frame is associated with a measurement in the bank, the corresponding
entry in the measurement bank will be highlighted. The scan video is replayed by clicking the
[REWIND]
button and then the
[PLAY]
button in the bottom left
-
hand corner.
DELETING A
-
SCAN MEASUREMENTS
If a measurement is observed which is suspect because it does not agree with the other
measurements, it may be removed or replaced with a different measurement. To delete an
entry from the measurement bank, first select the
[MANUAL MODE]
radio button. Right
-
click on
the entry to be removed and select
[REMOVE MEASUREMENT]
from the menu .
MANUAL MEASUREMENT MODE REVIEW
The Scanmate software can be placed in Manual Measurement Mode by selecting the
[MANUAL
MODE]
radio button. In this mode scans must be stopped by the operator and measurements
must be manually selected and entered into the measurement bank. Manual Mode scans are
only stopped by user commands or if the video buffer expires. Measurements can be reviewed
and deleted as described above. Users can also make gain and measurement point adjustments.
On a desired frame, the measurement points can be set by the user. In contact mode, three red
arrows represent measurement points that can be selected; they represent the anterior and
posterior lens surfaces (L1 and L2) and the retina (R). In immersion mode, the corneal peak is
also visible in the waveform and is indicated by an additional arrow at the leftmost echo.
The red arrows can be moved horizontally by using the mouse to left click
-
and
-
hold on the
arrow, then sliding it to the desired position. When a measurement arrow is released it will snap
to the closest intersection of the measurement level and the displayed waveform. The
measurement points can only be adjusted when the video is paused. The horizontal green line
represents the measurement level. In manual mode, the measurement level can be adjusted up
and down while the video is paused or playing. The three sliders control the gain at the three
measurement points (L1, L2, and R). They can be adjusted independently while the video is
paused or playing. The amount of gain is displayed as a percentage of the incoming waveform
amplitude.
A measurement can be added to the measurement bank by right
-
clicking in the measurement
bank and selecting
[INSERT MEASUREMENT]
. Measurements that are manually inserted are
given a
“
MAN
”
rank.
SAVE A
-
SCAN MEASUREMENTS
Go to
File > Save > A
-
Scan Measurements
†
to save the entries in the measurement bank for
both the OD and OS. A saved A
-
Scan measurement will also contain the measurement average
and standard deviation for the AXL, ACD, LT and VCD, as well as lens and vitreous type.
SAVE A
-
SCAN VIDEO
Go to
File > Save > A
-
Scan Video
†
to save all frames of the A
-
Scan performed. Saving the A
-
Scan
Video (rather than just the measurements) allows the user to review the entire measurement
procedure and select manual measurement points. The user can also make adjustments to the
waveform, such as gain and compression sensitivity settings. The scan video and associated
measurements will remain in memory for each eye (OD and/or OS) until either a new scan is
performed for that eye, or a new patient is selected.
†
This command may be executed through voice control. Refer to the
A
-
Scan Voice Controls
section.
