Cortexa Technology DermaLab Mini Instructions For Use Manual page 16

CORTEX TECHNOLOGY ApS
A
C
B
Curve - Ultrasound image with superimposed Super A-scan.
Interpretation of the Super A-scan:
The red left part of the curve indicates the intensity of the ultrasound passing through the water
chamber in the probe. The high left peak originates from the combined film/epidermal reflection.
The yellow part of the Super A-scan indicates the Low Echogenic Band (LEB) of the dermis (C,
calculated in micrometers). In otherwise healthy skin the LEB may be a possible result of photo
aging).
The green part of the curve indicates the more reflective part of the dermis (in otherwise healthy
skin a possible result of the deeper dermis not being subject to photo damage). Together, the yel-
low and green part of the curve add up to the average Skin Thickness (calculated in micrometers),
for which also the average Intensity (A) is calculated.
The red right part indicates the intensity of the ultrasound passing through the subcutaneous lay-
ers.
If the line is red all over, then the dermis and/or Low Echogenic Band is not clearly detected by
the software and the automatic calculations are not performed or may be incorrect.
This may be a result of incorrect gain setting. If so, then change the gain 1-2 steps and record a
new image. Please refer to 6.6 – "The ultrasound image".
It may also be a natural consequence of a physical skin condition – e.g. edema (fluid leads to less
and weaker reflections/lower intensities).
Please note, that diseased skin may appear visually different not only to the naked eye but also in
terms of ultrasound intensity patterns and levels.
In general, homogeneous areas and tissues are less reflective and appear dark (e.g. fluid, blood,
fat, altered cell structures). Non-homogeneous structures - i.e. density changes in the tissue –
cause reflections of varying intensities due to changing acoustical properties (e.g. healthy skin
with intact collagen, elastin, connective tissue).
Grid measurements automatically adapt to the curvature of the skin surface to place a line, which
follows the back side of the epidermis and becomes the left side of the grid (A). This line may be
freely repositioned using the left/right arrows (B).
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