NCT07494396Not yet recruiting
An AI-Based Erythema Measurement System for Psoriasis Lesions
Development and Validation of an AI-Based Erythema Measurement System for Psoriasis Lesions Using Smartphone Imaging With Color Card Compared to Standard Color Calibration Device
Source: ClinicalTrials.gov · Last updated 5 Aug 2026
Brief summary (registry, in English)
Psoriasis is a common chronic inflammatory skin disease. Disease severity is commonly assessed using the Psoriasis Area and Severity Index (PASI), in which erythema is graded subjectively on a 0-4 scale. This visual assessment is prone to significant inter- and intra-rater variability. Although objective tools such as colorimeters provide accurate erythema measurement, their high cost limits routine clinical use. Smartphone imaging combined with artificial intelligence (AI) offers a practical alternative for objective assessment. However, variability in lighting conditions can affect image consistency. Incorporating a color calibration card enables accurate color normalization. This study aims to develop and validate an AI-based system for measuring erythema in psoriatic lesions using smartphone images with a color card, compared against a standard colorimeter to assess validity and reliability.
- Status (registry)
- Not yet recruiting
- Study type
- Observational
- Enrollment
- 50 (estimated)
- First submitted
- 20 Mar 2026
- Start date
- 1 Nov 2026
- Primary completion date
- 20 Apr 2027
- Lead sponsor
- Khon Kaen University
- Diseases
- Psoriasis
- NCT number
- NCT07494396
What you commit to
- Study type: Observational
- Planned participants: 50
- From 1 Nov 2026 to the primary completion date, 20 Apr 2027
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Presence of skin infection or other lesions that may interfere with color assessment (e.g., tattoos)
Other
- Use of self-tanning products or substances that alter skin color
- Inability to perform photography or comply with study procedures
Who the study is looking for
- Adults aged ≥18 years
- Diagnosed with psoriasis by a dermatologist
- Presence of at least five clearly photographable lesions
- Willing and able to take photographs using a smartphone with both a standard color calibration card and a study-specific color card at home weekly, and submit images via Line or email
- Willing to have clinical photographs taken at baseline and at a follow-up visit
- Provides written informed consent to participate in the study
Age in the registry: 18 years to 100 years · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Khon Kaen University Coordinator of this site? Confirm its status | Khon Kaen | Thailand | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.