Measuring Volume Using a 3D Scanner and iPad to Grade the Swelling of Legs

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

10 participants

Study Classification

OBSERVATIONAL

Study Start Date

2024-04-16

Study Completion Date

2025-02-20

Brief Summary

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We used a new and easy-to-measure iPad 3D scanner to measure swelling in lower limbs because current technology is not easily available or affordable. We want to see how reliable the measurements are and what might affect how consistent they are.

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Detailed Description

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Twenty limbs from ten healthy volunteers were scanned using an iPad-based Structure Sensor and software. Initial scans followed standard manufacturer instructions, but high variance rendered data unsuitable for clinical use. To improve accuracy, a standardized scanning protocol was developed, incorporating anatomical calibration, scanning distance standardization, and scanning time control. A 254-mm calf segment was defined using a 3D marker placed on the medial malleolus to ensure consistent volume measurement. The scanning distance was fixed between 50-59 cm to reduce zoom parallax errors, and scans were conducted after 3 PM to minimize diurnal volume fluctuations. Multiple technicians performed repeat scans on the same limb to assess intra-observer and inter-observer scan reliability.

Conditions

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Limb Volume Measuring Edema

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Twenty limbs from ten healthy volunteers

STO3 sensor (Structure Inc., Boulder, CO)

Intervention Type OTHER

The advent of Apple iPad based 3D scanner opens a new avenue for measuring limb volume. The latest ambient light scanner model was utilized for the current study. 3D scanning technology has gained broad industrial use, including the manufacturing of high-precision tools. A commercially available software package was used for limb volumetry.

Interventions

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STO3 sensor (Structure Inc., Boulder, CO)

The advent of Apple iPad based 3D scanner opens a new avenue for measuring limb volume. The latest ambient light scanner model was utilized for the current study. 3D scanning technology has gained broad industrial use, including the manufacturing of high-precision tools. A commercially available software package was used for limb volumetry.

Intervention Type OTHER