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Standard Pixelometry: A Novel and Accessible Approach for Accurate Upper Lip Scar Measurement
Siqi Wei1, Yuan Gao, Yongqian Wang
1Center for Cleft Lip and Palate Treatment, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Ba-da-chu, Beijing, China.
Introduction:
Accurate measurement of upper lip scarring is clinically important but challenging. Traditional methods like transparent film tracing are often time-consuming. This study introduces standardized pixelometry-a simple, precise alternative-and evaluates its performance compared with conventional tracing. The goal is to provide a more efficient and reliable scar assessment method.
Methods:
Fifty patients with upper lip scars were enrolled. Scar areas were measured using both methods. For standardized pixelometry, 1×1 cm² reference stickers were placed on the chin, followed by digital photography and software-based area calculation. Transparent film tracing involved manual outlining on films and subsequent software analysis.
Results:
Standardized pixelometry showed excellent accuracy (ICC=0.986 versus film tracing) and inter-rater consistency (ICC=0.998). It reduced measurement time significantly (2.45±0.72 versus 4.17±1.05 min, P<0.001) while maintaining high repeatability.
Conclusions:
Standardized pixelometry outperforms traditional methods, offering superior precision, efficiency, and reliability, making it ideal for clinical and research applications in scar assessment.
