Image
analysis
Since the pictures are stored as digital images a computer assistet
image analysis is possible. The Tuebinger Mole Analyser enables an exact
measurement of pigmented lesions. In a first step hairs, pieces of fluff,
bubbles and etc. are digitally subtracted, and than the border of the
lesion is determined by approximation from both sides (this step can
be corrected manually). Subsequently, the area and other geometric parameters
are measured and the border and its regularity and sharpness are determined.
This measurements are the basis for comparison of pigmented moles during
follow-up and screening of patients with melanocytic nevi. Little changes
can be detected with high sensitivity and the results of this analysis
can be used to indicate or to reject excision. The Tuebinger Mole Analyser
has the possibility to parallelly analyse two pictures on the screen.
hints in order to judge if the lesion is benign or malignant. If 20
fold magnification is used for the parameters of measurements scores
are calculated and higher scores indicate increased probability for
malignancy. The interpretation, however, of pictures and scores requires
experience with computer dermatoscopy and automatic diagnoses can not
be optained.