A method to produce high contrast vein visualization in active dynamic thermography (ADT)

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Physiology

Background:

• Vein visualization is crucial for clinical procedures such as venipuncture and cannulation.
• Existing methods for vein visualization may lack sufficient contrast or real-time feedback.
• Active dynamic thermography (ADT) offers a non-invasive approach to visualize subsurface structures.

Purpose of the Study:

• To demonstrate a novel dynamic synthetic imaging (SI) method for improved vein topology visualization.
• To evaluate the effectiveness of the dynamic SI method compared to static SI extraction.
• To investigate the influence of cooling stimulation temperature on SI contrast.

Main Methods:

• Infrared (IR) thermal imaging captured transient temperature changes in the forearm after cooling.
• Dynamic synthetic images (SI) were generated using the tissue activity ratio (TAR) during thermal recovery.
• The dynamic SI method was compared against a static SI extraction method using data from 14 participants.

Main Results:

• The dynamic SI method provided a live feed of high-contrast vein visualizations.
• No statistically significant difference in SI contrast was observed across tested cooling temperatures (5°C, 8°C, 11°C).
• Dynamic SI demonstrated superior vein visualization compared to the static SI method.

Conclusions:

• The dynamic SI method offers a promising advancement for real-time, high-contrast vein visualization.
• This technique has potential applications in assisting clinical procedures like venipuncture and cannulation.
• Further integration with projection systems could enhance its clinical utility.