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Hand-held electronic area planimeter

G S Kath1, C H Chang, M Kniazuk

  • 1Merck Research Laboratory, Rahway, NJ 07065, USA.

IEEE Transactions on Bio-Medical Engineering
|September 1, 1995
PubMed
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Researchers developed a portable electronic planimeter for accurately measuring skin reactions in dermatitis studies. This handheld device offers precise, non-contact area measurements up to 1000 mm², aiding clinical research.

Area of Science:

  • Biomedical Engineering
  • Dermatology
  • Medical Instrumentation

Background:

  • Dermatitis assays require accurate measurement of skin reactions (wheals).
  • Existing methods for wheal area measurement can be time-consuming or lack precision.
  • A need exists for a portable, user-friendly device for quantifying wheal size.

Purpose of the Study:

  • To develop and fabricate a portable, hand-held electronic area planimeter.
  • To enable precise, non-contact measurement of wheal areas in dermatitis assays.
  • To provide a digital readout for immediate data acquisition.

Main Methods:

  • The planimeter utilizes an optical beam splitter/cross-hair system.
  • A miniature x-y table allows tracing of the wheal's perimeter.

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  • Transducers and an electronic circuit integrate the traced area for digital display.

    • Main Results:

    • The developed electronic area planimeter is portable and hand-held.
    • It enables non-contact measurement of wheal areas up to 1000 mm².
    • The device achieves a resolution of 1 mm² for precise measurements.

    Conclusions:

    • The portable electronic area planimeter is a viable tool for dermatitis research.
    • It offers accurate and efficient measurement of wheal areas.
    • This instrument can improve the standardization and data quality in dermatological assays.