Title: Tubus for determining the boundaries of a beam of penetrating rays

Abstract: A tubus for defining the boundary of a beam of penetrating rays, which is preferably adapted for use in the radiation therapy. In a tubus of the above-mentioned type, the tube wall is thereby constructed of a plurality of over-lapping wall elements directed in parallel with the edge radiation of the radiation cone encompassed by the tubus, and suspended on the tubus housing so as to be displaceable to the direction of the edge radiation. That type of construction of the tubus facilitates the cross-section and also the surface of the focused radiation cone to be varied. Thereby it becomes possible to correlate the radiation field in a stepless manner by means of one and the same tubus over a wide range to almost every form and size of the illness spread.

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Inventors: Arauner, Alfred (Furth, DT)

Application Number: 617579
Filing Date: 1975-09-29
Publication_date: 1977-07-05
Assignee: Siemens Aktiengesellschaft (Berlin & Munich, DT)
Primary Class(es): 378/152 378/153, 976/DIG430
Other Classes:
US Patent Ref:

1909118	May, 1933	Raab	250/513.
2542196	Feb, 1951	Haupt	250/513.
2570820	Oct, 1951	Knab	250/511.
3942019	Mar, 1976	Claridge et al.	250/512.

Other Refs:
Primary Examiner: Smith, Alfred E.
Assistant Examiner: Grigsby, T. N.
Attorney: Hill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson