FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2152804055> ?p ?o ?g. }

• W2152804055 endingPage "800" @default.
• W2152804055 startingPage "799" @default.
• W2152804055 abstract "A common planning problem is the treatment of large areas, 30 to 40 cm on a side. This can be done quite easily with parallel opposing fields if one has a therapy unit with a reasonable output at 80 to 100 cm and a design which permits positioning of the patient at these distances. Otherwise, segmental therapy or some form of a trunk bridge must be employed. The most popular segmental technic is the M. D. Anderson system which has been described as the “horizontal moving strip” (1). More recently, a vertical moving strip technic has been described by Aral and Spira (2). These require fields of many different sizes and long periods of time to give relatively modest doses. An even less desirable method is the use of adjoining fields. This gives quite inhomogeneous depth doses because of the penumbra of the cobalt source. The method which we are currently studying is that of moving the patient under the open shutter of a cobalt therapy unit for distances up to 60 cm. This is done by first positioning a transparent Plexiglas tray over the patient for the support of lead blocks delimiting the ends of the field and then moving the entire complex under the aperture of the cobalt unit. A variable speed motor is fixed to the wall at the end of the table and attached with a wire and hook. The treatment begins and ends with the beam absorbed by the field-limiting lead blocks at either end, so that no area is exposed longer than any other. These blocks are 6 cm thick and transmit less than 3 per cent of the beam (Fig. 1). There are two variables for determining the dose delivered: the source-skin distance and the speed of the table. The width of the field will determine the source-skin distance. That is, the shortest SSD will be used that can provide a field of the desired width. For the treatment of long narrow fields (para-aortic nodes, spinal canal), a narrow field, short-distance technic can be employed: 50 to 55 cm source-skin distance. Treatment of the whole abdomen or one hemithorax may require a wider field at 60 to 65 cm SSD. The other dimension, the length, is limited only by the distance the table can be made to travel. It may be only 30 cm for a whole abdomen or 50 to 60 cm for the thoracoabdominal para-aortic area or an entire femur. The dose delivered will then be varied by the speed of the field: the slower the movement the greater the dose delivered to any one point. The dose is monitored by placing a sensing device at various positions in the field to be irradiated. This is connected to an integrating rate-meter, and the time required for the beam to pass any one point is measured. The variation in exposure dose at different sites is less than 2 per cent. The depth dose is still subject to the usual variations of inhomogeneity of tissues and variations in the patient's contour. The therapy unit on which this is employed is a rotating telecobalt machine designed to rotate at 55 cm source-axis distance." @default.
• W2152804055 created "2016-06-24" @default.
• W2152804055 creator A5005575353 @default.
• W2152804055 creator A5081527714 @default.
• W2152804055 date "1968-04-01" @default.
• W2152804055 modified "2023-09-25" @default.
• W2152804055 title "Large-Field Telecobalt Therapy with a Moving Table: Technical Aspects" @default.
• W2152804055 cites W1977758678 @default.
• W2152804055 doi "https://doi.org/10.1148/90.4.799" @default.
• W2152804055 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/5640814" @default.
• W2152804055 hasPublicationYear "1968" @default.
• W2152804055 type Work @default.
• W2152804055 sameAs 2152804055 @default.
• W2152804055 citedByCount "1" @default.
• W2152804055 crossrefType "journal-article" @default.
• W2152804055 hasAuthorship W2152804055A5005575353 @default.
• W2152804055 hasAuthorship W2152804055A5081527714 @default.
• W2152804055 hasConcept C120665830 @default.
• W2152804055 hasConcept C121332964 @default.
• W2152804055 hasConcept C127413603 @default.
• W2152804055 hasConcept C188198153 @default.
• W2152804055 hasConcept C24890656 @default.
• W2152804055 hasConcept C2776871301 @default.
• W2152804055 hasConcept C71924100 @default.
• W2152804055 hasConcept C78336883 @default.
• W2152804055 hasConcept C78519656 @default.
• W2152804055 hasConceptScore W2152804055C120665830 @default.
• W2152804055 hasConceptScore W2152804055C121332964 @default.
• W2152804055 hasConceptScore W2152804055C127413603 @default.
• W2152804055 hasConceptScore W2152804055C188198153 @default.
• W2152804055 hasConceptScore W2152804055C24890656 @default.
• W2152804055 hasConceptScore W2152804055C2776871301 @default.
• W2152804055 hasConceptScore W2152804055C71924100 @default.
• W2152804055 hasConceptScore W2152804055C78336883 @default.
• W2152804055 hasConceptScore W2152804055C78519656 @default.
• W2152804055 hasIssue "4" @default.
• W2152804055 hasLocation W21528040551 @default.
• W2152804055 hasLocation W21528040552 @default.
• W2152804055 hasOpenAccess W2152804055 @default.
• W2152804055 hasPrimaryLocation W21528040551 @default.
• W2152804055 hasRelatedWork W1964690639 @default.
• W2152804055 hasRelatedWork W2021687945 @default.
• W2152804055 hasRelatedWork W2050467175 @default.
• W2152804055 hasRelatedWork W2059599663 @default.
• W2152804055 hasRelatedWork W2060682485 @default.
• W2152804055 hasRelatedWork W2063586000 @default.
• W2152804055 hasRelatedWork W2085366150 @default.
• W2152804055 hasRelatedWork W2164174197 @default.
• W2152804055 hasRelatedWork W2168891222 @default.
• W2152804055 hasRelatedWork W45761799 @default.
• W2152804055 hasVolume "90" @default.
• W2152804055 isParatext "false" @default.
• W2152804055 isRetracted "false" @default.
• W2152804055 magId "2152804055" @default.
• W2152804055 workType "article" @default.