DOCUMENT NO. 920012 REV 2 EFFECTIVE 03-14-18 INFRASCAN CONFIDENTIAL PAGE 19 OF 35
8.
After each successful measurement, the Infrascanner
will beep and the blue square indicator will prompt
the user to move to the next head location. An error
will be indicated by an elongated beep. When an
error occurs look at the screen to read the error
message. Then clear the message by pressing the
green button. Repeat the measurement in the same
location (or in the contralateral side
– depending on
the error message). After successful measurement of
two contralateral head locations the Infrascanner will
display the relative optical density difference between
left and right sides of the head with a relative
measurement uncertainty of 0.02, left vs. right. The
green circle in the display changes to red when the
OD difference exceeds 0.2. The OD is a logarithmic
scale and represents about a 50% difference between
the light intensity from one side to the other.
9.
The Infrascanner may be used on patients with open
wounds but is placed adjacent to, not in, the wound. Wipe away any residual blood
before placing the light guides on the scalp. Feel the measurement area with your
fingers to verify that you are not measuring over a subcutaneous scalp injury (“head
bump”). This condition could adversely affect the results of the measurement.
10.
After completing each data pair, review the screen. If one of the locations is red,
use the arrow keys to navigate to that location and repeat the measurement of the
pair (up to two more times), to confirm the findings and reduce the chances of a
false indication due to a trapped hair under the light guides. Continue testing until
the entire head scan is complete. To assist color blind users, the red locations have
different pattern than green locations. Note: Taking measurements with dark
skinned, dark haired subjects is more difficult than light haired, light skinned
subjects, because the dark pigment in skin, hair, and hair follicles is very absorbent
of NIR light resulting in a weaker signal for the Infrascanner to detect.
11.
If it is desired to re-
take data, press the “Home” button for a new head scan.
Otherwise, remove the Disposable Fiber Optic Shield to turn off the Infrascanner.
3.3
DATABASE, ARCHIVE, AND PRINTING
All measurements are automatically saved on the Infrascanner. Each measurement is
saved as a text file. The name of each data file is the date and time of that measurement:
“n_yymmdd-hhmmss.txt” (measurement serial number, year, month, date, hour, minutes
and seconds).
To view archived measurements on the Infrascanner:
1.
In the Main Screen (Figure 3-6),
click on “Archive” button.
2.
To view archived measurements clic
k on “View” button, as shown in Figure 3-11.
3.
In the list of all the measurements select the required serial number of the
measurement and click on “View” button, as shown in Figure 3-12.
Figure 3-10: Measurement
Screen with results
