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Publication numberUS2748293 A
Publication typeGrant
Publication dateMay 29, 1956
Filing dateJun 26, 1952
Priority dateSep 8, 1951
Publication numberUS 2748293 A, US 2748293A, US-A-2748293, US2748293 A, US2748293A
InventorsFriedrich Reiniger
Original AssigneeHartford Nat Bank & Trust Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Irradiation applicator for chi-ray therapy
US 2748293 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

May 29, 1956 F. REINIGER IRRADIATION APFLICATOR FOR mm THERAPY Filed June 26, 1952 INVENTOR. fizzzvkzclikmrlem BY AGENT.

IRRADIATION APPLICATOR FOR X-RAY THERAPY Friedrich Reiniger, Hamburg-Fuhlsbuttel, Germany, as-

signor to Hartford National Bank and Trust Company, Hartford, Conn., as trustee Application June 26, 1952, Serial No. 295,663

Claims priority, application Germany September 8, 1951 3 Claims. (Cl. 250105) In medical radiology the general practice is to use irradiation attachment compressors for limiting the effective beam. With some kinds of irradiation, for example in the case of deep therapy irradiation, the said attachment compressors also serve for accurately fixing the distance of the focal spot from the surface of the tissue to be penetrated by the rays. This distance is important in view of the specific depth dose-decrease. The desired specific depth dose-decrease is generally ensured not only by the said distance but also by the choice of a suitable fixed filter incorporated in the attachment compressor. A so-called balancing filter permits of varying the specific depth dose-decrease, particularly at the surface of issue of the rays, by altering the filter thickness.

In the known compressor constructions it is essential that the filter made of metal (fixed filter or balancing filter) should be given a definite spatial curvature. The latter is determined by the need for a possibly uniform superficial load at the front face of the compressor, which comes into contact with the body of the patient. It goes Without saying that shaping the metal filter in its due form entails difficulty.

In deep therapy, so-called endotherapy, the tubular compressor is inserted in the body of the patient, for example, in the intestine, it being the standard practice to provide for circulation of cooling water in order to carry off the tube energy converted into heat, Since the cooled focal spot of the cylindrical hollow anode is enclosed within the irradiation compressor, the latter assumes the temperature of the cooling water in the case of metal irradiation attachment compressors hitherto known. This not only is found disagreeable by the patient but may also be harmful and endeavours have therefore been made to remedy the fault by the use of preheated cooling water. Nevertheless contact with the metal surface remains unpleasant for the patient.

The invention permits of obviating the difiiculties outlined. According to the invention, this is effected in the case of an irradiation attachment compressor for X-ray therapy and more particularly for deep therapy, by providing, at least in front of the point of issue of the "ice rays, an X-ray resistant plastic having the desired superficial form.

According to the invention, as an alternative the entire top of the compressor may be coated with plastic or the whole of the compressor may be made of plastic.

It has been found that hardenable cast resins are adapted to be used with advantage for carrying out the invention.

In order that the invention may be clearly understood and readily carried into effect, it will now be described in detail with reference to the accompanying drawing, in which one embodiment of the invention is shown by way of example.

Referring to the single figure of the drawing, there is shown an anode pipe 10 in the form of a long tubular elongation of an X-ray tube. At the inclined front end of the pipe 10, there is provided a transmission target 4. The pipe 10 is surrounded by a cooling-water-jacket 11. Electrons travelling through the pipe 10 and impinging on the target 4 produce X-rays which pass through the target and out the inclined ends of the pipe 10 and jacket 11. A hollow attachment compressor 12, provided with ray protection 1, fits over the end of the jacket 11. At the point of issue of the rays emanating from the target 4, provision is made of a fixed filter or a balancing filter 2. Due to the invention the form of this filter is no longer critical, the filter being preferably flat. The form of the outer surface, optimum for a minimum load and also for insertion in the body, is obtained by coating with plastic 3. By reason of its low thermal conductivity the use of this plastic ensures in addition that during operation of the X-ray tube temperature fluctuations are no longer'a nuisance for the patient.

What I claim is:

1. An irradiation compressor attachment for X-ray therapy adapted to fit over an end of an X-ray tube from which radiation emanates comprising a hollow tubular elongated member having an end wall portion through which radiation of desired intensity emanates, said end wall portion being constituted of an X-ray resistant synthetic hardenable cast resin plastic and having an exterior convex curvature adapted to conform to the surface of tissue with which it is to be placed in contact.

2. A compressor as claimed in claim 1 in which the compressor is wholly made of plastic.

3. A compressor as claimed in claim 1 in which a flat balancing filter is provided in front of the end Wall.

References Cited in the file of this patent UNITED STATES PATENTS 1,754,810 Wappler Apr. 15, 1930 2,144,114 Lehoczky Jan. 17, 1939 2,497,755 Berggren Feb. 14, 1950 2,506,342 Burke May 2, 1950 2,509,808 Cerniglia May 30, 1950

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1754810 *Mar 21, 1922Apr 15, 1930Wappler Electric Company IncChi-ray protective device
US2144114 *Mar 10, 1937Jan 17, 1939Herman J SpeckX-ray machine
US2497755 *May 10, 1946Feb 14, 1950Hartford Nat Bank & Trust CoX-ray tube with movable directing cone
US2506342 *Aug 9, 1947May 2, 1950Burke Arnold CPlacenta filter
US2509808 *Oct 20, 1947May 30, 1950Cerniglia Frank PCone attachment for chi-ray machines
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2919362 *Apr 21, 1958Dec 29, 1959Dunlee CorpStabilized x-ray generator
US3752990 *Jun 18, 1971Aug 14, 1973Fischer HX-ray device having an anode tube with filtering means thereon
US5153900 *Sep 5, 1990Oct 6, 1992Photoelectron CorporationMiniaturized low power x-ray source
US5165093 *Mar 23, 1992Nov 17, 1992The Titan CorporationInterstitial X-ray needle
US5369679 *Oct 2, 1992Nov 29, 1994Photoelectron CorporationLow power x-ray source with implantable probe for treatment of brain tumors
US6195411May 13, 1999Feb 27, 2001Photoelectron CorporationMiniature x-ray source with flexible probe
US6320932Dec 22, 2000Nov 20, 2001Photoelectron CorporationMiniature radiation source with flexible probe and laser driven thermionic emitter
USRE35383 *Jul 5, 1994Nov 26, 1996The Titan CorporationInterstitial X-ray needle
Classifications
U.S. Classification378/65, 976/DIG.442, 378/159
International ClassificationG21K5/04
Cooperative ClassificationG21K5/04
European ClassificationG21K5/04