A flexible microprocessor system for the measurement of cell size

Area of Science:

• Histochemistry
• Biomedical Engineering
• Muscle Physiology

Background:

• Accurate measurement of biological structures is crucial for research.
• Traditional methods for calculating muscle fiber area can be imprecise.
• A need exists for a flexible and accurate measurement system.

Purpose of the Study:

• To describe a flexible system for length and area measurement.
• To illustrate its application in planimetric measurement of muscle cross-sectional areas.
• To compare its accuracy against conventional methods.

Main Methods:

• Interfacing the Reichert Jung MOP-1 area measuring device with a Commodore PET computer.
• Utilizing planimetry for cross-sectional area measurements in histochemical muscle preparations.
• Employing a "form factor" to identify abnormally shaped muscle fibers.

Main Results:

• The system provides real-time data display, including numerical values and frequency histograms with statistical analysis.
• Mean values for fiber area in normal human skeletal muscle were determined.
• The planimetric method showed a significant difference compared to calculating area from lesser diameter, with traditional methods underestimating by ~30%.

Conclusions:

• The described system is rapid, accurate, and flexible for measuring length and area.
• It is particularly advantageous for analyzing muscle fiber areas, especially in diseased states with abnormal fiber shapes.
• The system is suitable for various graphical record measurements beyond muscle tissue analysis.