RADIOGRAPHIC SYSTEMS AND METHOD
An x-ray generator is described, which may be selectively operated in conventional radiographic systems or cineradiographic systems. A pulse-forming and -timing circuit for generating an essentially square voltage pulse is provided. A switching circuit built into the x-ray tube comprises an electric field-forming element that encircles the filament and, when the negative bias is applied, creates a negative field to prevent flow of electrons from filament to anode. The filament associated with the switching circuit produces a small focal spot of precisely controlled dimensions for use in cineradiography. A second filament in the same tube is separate from the switching means and selectively operable. It produces a large focal spot suitable for conventional radiography. (A.G.W.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-005472
- Assignee:
- The Machlett Labs., Inc.
- Patent Number(s):
- US 3103591
- OSTI ID:
- 4131436
- Country of Publication:
- United States
- Language:
- English
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