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Related Experiment Videos

Ni-Cds: the memory lingers on.

R S Skinner1

  • 1University Hospital of Wales, Heath Park, Cardiff, UK.

The Journal of Audiovisual Media in Medicine
|January 1, 1992
PubMed
Summary

Medical photographers

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Area of Science:

  • Medical photography
  • Electrical engineering
  • Materials science

Background:

  • The power sources for portable electronic flash units used in medical photography have evolved significantly over time.
  • Early power sources included disposable batteries and wet cells, followed by nickel-cadmium rechargeable batteries.
  • Recent advancements have introduced 'dry-fit' rechargeable batteries.

Purpose of the Study:

  • To examine the characteristics of nickel-cadmium rechargeable batteries, focusing on their charge/discharge cycling and chemical memory.
  • To compare nickel-cadmium batteries with single-use and other rechargeable battery types.
  • To evaluate these batteries based on ease of use, capacity, and working life for medical photography applications.

Main Methods:

  • Literature review of battery technologies in medical photography.
  • Analysis of charge/discharge cycling data for nickel-cadmium batteries.
  • Comparative assessment of different battery types based on performance metrics.

Main Results:

  • Nickel-cadmium batteries exhibit specific charge/discharge behaviors and a chemical 'memory' effect.
  • Comparisons reveal differences in ease of use, capacity, and lifespan among battery types.
  • The evolution towards 'dry-fit' batteries suggests improvements in convenience and performance.

Conclusions:

  • Nickel-cadmium batteries have been a key power source, but their chemical memory requires consideration.
  • Understanding battery characteristics is crucial for optimizing portable flash performance in medical photography.
  • Ongoing battery technology advancements continue to enhance the capabilities of medical imaging equipment.

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