Improved Detection of Dermoscopic Structures by High Dynamic Range Image Conversion

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  • HDR変換を用いたダーモスコピー画像構造物の明瞭化
  • HDR ヘンカン オ モチイタ ダーモスコピー ガゾウ コウゾウブツ ノ メイリョウカ

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Abstract

Objective: To facilitate identification of dermoscopic structures by new dermoscopy trainees using image conversion. Design: Observational study. Setting: Dermatology clinic. Materials: Dermoscopy images of 4 melanocytic nevi, 1 malignant melanoma, 1 seborrheic keratosis, 1 basal cell carcinoma and 1 Bowen’s disease. Intervention: Comparative analysis of dermoscopic images by high dynamic range (HDR) image conversion and original images. Main outcome measures: Disease-specific dermoscopic structures, including typical pigment network, regular dots/globules, regular streaks, and parallel furrow pattern in melanocytic nevi; atypical pigment network, peripheral dots/globules, blue-whitish veil in melanoma; comedo-like openings, multiple milia-like cysts, and fissures/ridges in seborrheic keratosis; arborizing vessels, leaf-like areas, multiple blue-gray globules, and spoke-wheel areas in basal cell carcinoma; red-blue lacunae in vascular lesions; and dotted vessels, glomerular vessels, and scaling in Bowen’s disease. Results: The use of HDR images improved detection with clear contrast and visualization of dermoscopic structures even in structureless areas. Conclusion: The results suggest that HDR image conversion facilitates identification of dermoscopic structures by new dermoscopy trainees.

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