US3678233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Standardized set of compensating filters for mantle-field radiation therapy
Assignee: United States Department of Health and Human Services
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Filing: 1970-04-02
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Granted: 1972-07-18
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Expires: 1990-04-02
Abstract
Abstract A standardized set of compensating filters for ''''mantle-field'''' radiotherapy. The set of compensating filters is supported in a filter-holder interposed between the radiation source and the patient and includes a plurality of individual filter elements which are selectively combined to provide the various portions of the mantle-field of the patient with a predetermined, reproducible radiation dosage.
Inventors
- 👤 Frederick L Faw
- 👤 Ralph E Johnson
- 👤 Constance A Warren
- 👤 Dwight W Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/10; A; A61; A61B; A61B6/00; A61B6/10; A61B6/107; A61N; A61N5/00; A61N5/10; A61N2005/1092; A61N2005/1095; A61N2005/1096
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A clinical radiotheraphy device for mantle field irradiation comprising a set of compensating filters to be interposed between a patient and a radiation source, said set of compensating filters including a filter holder, and a plurality of individual filter elements, selected filter elements being combined and supported by said filter holder to simultaneously provide selected portions of the mantle-field of a patient with different predetermined, reproducible, radiation dosages, said Individual filter elements including lateral cervical filter means, midline cervical and supraclavicular filter means, axillary filter means and mediastinal filter means, said midline cervical and supraclavicular filter means being generally T-shaped including a midline cervical portion forming the stem of the T and a pair of mirror-image supraclavicular portions forming the crossbar of the T, said midline cervical and supraclavicular filter means being relatively thicker than the remainder of said filter means.
Claim 2
Dependent Claim
141 words
A clinical radiotheraphy device for mantle field irradiation comprising a set of compensating filters to be interposed between a patient and a radiation source, said set of compensating filters including a filter holder, and a plurality of individual filter elements, selected filter elements being combined and supported by said filter holder to simultaneously provide selected portions of the mantle-field of a patient with different predetermined, reproducible, radiation dosages, said Individual filter elements including lateral cervical filter means, midline cervical and supraclavicular filter means, axillary filter means and mediastinal filter means, said midline cervical and supraclavicular filter means being generally T-shaped including a midline cervical portion forming the stem of the T and a pair of mirror-image supraclavicular portions forming the crossbar of the T, said midline cervical and supraclavicular filter means being relatively thicker than the remainder of said filter means.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein said individual filter elements are formed of brass.
Claim 4
Dependent Claim
31 words
The improvement of claim 1 wherein said filter holder is formed of plastic and includes a recessed portion corresponding in shape to the overall outline of said set of compensating filters.
Claim 5
Dependent Claim
68 words
The improvement of claim 1 wherein said lateral cervical filter means comprises a pair of mirror-image lateral cervical filter members positioned on opposite sides of said midline cervical portion in said filter holder, said lateral cervical filter members each including a portion juxtaposed to said supraclavicular portions of said midline cervical and supraclavicular filter means which is relatively thicker than the remainder of said lateral cervical filter members.
Claim 6
Dependent Claim
73 words
The improvement of claim 1 wherein said mediastinal filter means is positioned centrally of the crossbar of the T of said midline cervical and supraclavicular filter means on the side of said crossbar opposite to the stem of the T, said mediastinal filter means including a portion juxtaposed to the crossbar of the T of said cervical and supraclavicular filter means which is relatively thicker than the remainder of said mediastinal filter means.
References Cited (Backward Citations)
US2405444A
Cited
US3248547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |