5. Correct use of the SIAscope V
The following symptoms may indicate inaccurate use of the SIAscope V, producing inconsistent con-
tact SIAscans. Check the precautionary notes below and repeat the scan to ensure the SIAscans con-
tain accurate indications.
•
SIAscan contains unusual black edges
•
Blotches on images
•
Consecutive scans contain a similar mark or spot
•
Blood SIAscan appears patchy
•
Colour view has green and red areas or featureless images
•
Unusual colored dots in the SIAscan
Important
Refer to the
section for limitations relating to unusual skin pigmenta-
tion conditions such as jaundice, tattoos, inks and cosmetics.
5.1. SIAscan contains unusual black edges
A shadow effect around the edge of the scan area, normally on the Blood or Collagen SIAscans, is
likely to have been caused by light ingress during scanning. To rectify the problem, repeat the scan
ensuring the window on the handset is fully in contact with the skin to exclude light.
5.2. Blotches on images
Blotches may be caused by bubbles in the matching fluid. The Blood SIAscan scan highlights these
bubbles particularly well. To rectify the problem, clean off the current layer of matching fluid, apply a
thinner layer and re-take the scan.
5.3. Consecutive scans contain a similar mark or spot
A re-occurring mark or spot on the scans is likely to have been caused by dirt or debris on the win-
dow. It is important to ensure that the window is always clean. It is often difficult to spot this kind of
problem when heavily featured or freckled areas are being scanned. One method recommended to
avoid this problem is to wipe the end of the handset after every scan with an Isopropyl wipe. This
serves to both clean and sterilize the window. (Suitable Isopropyl wipes available from Astron Clinica
and its distributors).
5.4. The blood SIAscan appears patchy
A patchy Blood SIAscan is often a symptom of excessive pressure being applied to the skin. This
pressure tends to whiten the skin surface pushing the blood into a blotched formation.
5.5. Colour view has a green and red areas or featureless images
This is most likely caused by handset movement during scanning. Ensure that the lesion is steady on
the viewfinder before starting a scan, and hold the handset in position until after the scan finishes. Ex-
cessive use of optical matching fluid can make it difficult to keep the handset still.
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Summary of Contents for MoleMate
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