Analysis of pressurized resistance vessel diameter changes with a low cost digital image processing device

Area of Science:

• Biomedical Engineering
• Physiology
• Image Analysis

Background:

• Accurate measurement of blood vessel diameter is crucial for understanding vascular function and disease.
• Existing methods for analyzing in vitro pressurized blood vessels can be costly and time-consuming.
• Need for an automated, cost-effective solution for real-time vessel diameter analysis.

Purpose of the Study:

• To present a low-cost digital image processing device and software for automatic on-line analysis of in vitro pressurized blood vessel diameter changes.
• To develop a system capable of analyzing vessels with inner diameters ranging from 80-400 microns.
• To provide researchers with a tool for real-time data acquisition and analysis of vessel mechanics.

Main Methods:

• Utilized a low-cost digital image processing device (frame grabber) and custom MS-WINDOWS software.
• Integrated the frame grabber with light microscopic imaging sources (video camera or VCR).
• Developed a novel algorithm for detecting vessel walls and calculating inner diameter and wall thickness from digitized images.

Main Results:

• The system successfully performs automatic on-line analysis of diameter changes in pressurized blood vessels.
• The software allows for image manipulation, calibration, storage, and real-time display of diameter versus time.
• Calculated data on inner diameter and vessel wall thickness are stored in an ASCII file for further analysis.

Conclusions:

• The presented digital image processing system offers a cost-effective and efficient solution for analyzing in vitro blood vessel diameter.
• The automated system facilitates real-time monitoring and data collection, aiding in vascular research.
• The ability to export data to common programs like MS-EXCEL enhances its utility in physiological studies.