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A simplified three-dimensional volume measurement technique in keloid scars: Validity and reliability
T van der Aa1, S H W L Verhiel1, M Erends1
1Department of Plastic Surgery, Maastricht University Medical Centre, P Debyelaan 25, 6229HX Maastricht, The Netherlands.
Summary
A simplified 3D imaging technique accurately measures keloid scar volume. This validated method offers a reliable tool for assessing keloid scar treatment effectiveness in clinical practice.
Area of Science:
- Dermatology
- Medical Imaging
- Biomedical Engineering
Background:
- Keloid scars cause significant cosmetic, psychological, and social distress.
- Existing 3D imaging for keloid evaluation is complex for clinical use.
- A simplified 3D volume measurement technique is proposed.
Purpose of the Study:
- To define the validity and reliability of a simplified 3D volume measurement technique for keloid scars.
- To establish a practical method for evaluating keloid scar treatment outcomes.
Main Methods:
- Simulated keloid scars were created using deformable modeling compound (n=33).
- Compound volume was determined by weight and density.
- 3D volume measurements were compared against calculated volumes.
Main Results:
- Initial measurements showed a high correlation (r=0.999) but a significant difference (0.252 cc).
- A correction formula (actual volume = 1.072 × measured volume) was derived.
- Validation with new data showed a nonsignificant difference (0.010 cc), confirming accuracy.
Conclusions:
- The simplified 3D measurement technique is valid and reliable.
- The technique, with the correction formula, is suitable for practical clinical use.
- This method aids in the effective evaluation of keloid scar treatments.
