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Questions and Answers
What is the primary material used as a base for modern X-ray film?
Which characteristic is essential for a good base material in X-ray film?
What was a critical issue with Cellulose Triacetate as a film base?
What is one of the main disadvantages of using Glass plates as a film base?
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Which attribute corresponds to high tensile strength in a film base?
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Study Notes
Medical X-ray Film Overview
- First recording medium for radiographic images.
- Film base serves as the foundation, providing a rigid structure for the emulsion.
- Thickness of the film base ranges from 150 to 300 μm.
Historical Evolution of X-ray Film Bases
- Glass plates: Early medium that was heavy and breakable.
- Cellulose Nitrate: Used in the 1920s to early 1930s, but flammable; led to a fire incident in a hospital.
- Cellulose Triacetate: Known as "safety base," introduced in the 1960s; thicker than polyester but retained moisture, causing staining on processed images.
- Polyester: Modern film base that is thinner, more flexible, dimensionally stable, and resistant to degradation from repeated processing.
Characteristics of a Good Base Material
- Dimensional Stability: Maintains original size through multiple processing cycles.
- Optical Clarity/Uniform Lucency: Necessary for clear imaging; crucial for visibility on a negatoscope.
- High Tensile Strength: Combines being thinner while maintaining strength to reduce parallax error in images.
- Flexibility: Essential to prevent breaking or snapping during use.
- Chemical Inertness: Must not alter in response to processing chemicals, ensuring consistent performance throughout its lifecycle.
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Description
Explore the evolution of X-ray film mediums from heavy glass plates to modern polyester materials. Learn about the characteristics of a good base material and how they impact radiographic imaging. This quiz covers key developments and properties essential for medical imaging.
