FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2079779662> ?p ?o ?g. }

• W2079779662 endingPage "389" @default.
• W2079779662 startingPage "381" @default.
• W2079779662 abstract "When we began to use rotation therapy at 250 kv. early in 1952, dosage determination methods by Hawley (1), Nielsen (2), and by Kligerman, Rosen and Quimby (3) were available. We adopted the method of the latter group, and it remains our basic method of dose assessment to date. A short time later, Wachsmann (4) suggested the measurement of the dose rate of the transmitted radiation as a measure of the tissue dose at the axis of rotation. We set out to confirm the validity of this system for 250-kv. radiation. The physical arrangement of the rotation chair, x-ray tube, and transit chamber are shown in Figure 1. The x-ray machine is operated at h.v.l. 1.7 mm. Cu, at a target-axis distance of 85 cm. The transit detector consists of a Victoreen Radocon with a 25-c.c. thimble chamber placed in the front surface of a presdwood phantom at 150 cm. from the target. A condenser r meter chamber of equally high sensitivity, such as the Victoreen 2.5-r chamber, would be satisfactory in a similar presdwood phantom, which we considered would minimize differences in the amount of scatter picked up from objects around the transit chamber in different rotation therapy rooms. A 25-r Victoreen chamber was used in a plastic jacket for making the axis measurements in water phantoms of various shapes and sizes. All measurements were expressed as per cent of the air dose rate at the axis or transit positions, as appropriate. Measurements were made simultaneously of axis and transit dose rates in air and at the center of a series of water phantoms, ranging in diameter from 11 to 35 cm., and in a series of elliptical base phantoms of equal base areas but with diameters in ratios of 1:1, 3:2, and 2:1. These studies were repeated for a range of portal areas, for elongated portals, and for non-central tumors, since these gave values which did not fall on the curves for central tumors. Further, the density of the phantom was changed by adding paper and air, bone, etc. Results Figures 2 and 3 show the variation, in per cent of air dose rate with portal area, with thickness of phantom as parameter, at the axis and transit positions respectively. From these curves, a family of curves was drawn (Fig. 4) relating the percentage air-dose rates at the axis and at the transit positions for various areas. The relationship shown was demonstrated to be valid for the elliptical phantoms (i.e., to be independent of body shape), and for phantoms containing water and air or water and bone. Observations on the effect of elongated portals on tumor dose are in agreement with those of Clarkson (6), and this correction should be applied for portals whose sides differ in length by a factor of 2 or more. This situation is not often encountered in our department." @default.
• W2079779662 created "2016-06-24" @default.
• W2079779662 creator A5012404088 @default.
• W2079779662 creator A5013953834 @default.
• W2079779662 date "1954-09-01" @default.
• W2079779662 modified "2023-09-27" @default.
• W2079779662 title "The Calculation of Rotation Therapy Tumor Doses at 250 Kv. by Means of the Transmitted Dose Rate" @default.
• W2079779662 doi "https://doi.org/10.1148/63.3.381" @default.
• W2079779662 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/13204601" @default.
• W2079779662 hasPublicationYear "1954" @default.
• W2079779662 type Work @default.
• W2079779662 sameAs 2079779662 @default.
• W2079779662 citedByCount "7" @default.
• W2079779662 crossrefType "journal-article" @default.
• W2079779662 hasAuthorship W2079779662A5012404088 @default.
• W2079779662 hasAuthorship W2079779662A5013953834 @default.
• W2079779662 hasConcept C104293457 @default.
• W2079779662 hasConcept C120665830 @default.
• W2079779662 hasConcept C121332964 @default.
• W2079779662 hasConcept C136229726 @default.
• W2079779662 hasConcept C145148216 @default.
• W2079779662 hasConcept C151770136 @default.
• W2079779662 hasConcept C153385146 @default.
• W2079779662 hasConcept C19527891 @default.
• W2079779662 hasConcept C198291218 @default.
• W2079779662 hasConcept C2524010 @default.
• W2079779662 hasConcept C2780934509 @default.
• W2079779662 hasConcept C2982854487 @default.
• W2079779662 hasConcept C2989005 @default.
• W2079779662 hasConcept C3017588741 @default.
• W2079779662 hasConcept C33923547 @default.
• W2079779662 hasConcept C62520636 @default.
• W2079779662 hasConcept C71924100 @default.
• W2079779662 hasConcept C74050887 @default.
• W2079779662 hasConcept C90774946 @default.
• W2079779662 hasConcept C94915269 @default.
• W2079779662 hasConceptScore W2079779662C104293457 @default.
• W2079779662 hasConceptScore W2079779662C120665830 @default.
• W2079779662 hasConceptScore W2079779662C121332964 @default.
• W2079779662 hasConceptScore W2079779662C136229726 @default.
• W2079779662 hasConceptScore W2079779662C145148216 @default.
• W2079779662 hasConceptScore W2079779662C151770136 @default.
• W2079779662 hasConceptScore W2079779662C153385146 @default.
• W2079779662 hasConceptScore W2079779662C19527891 @default.
• W2079779662 hasConceptScore W2079779662C198291218 @default.
• W2079779662 hasConceptScore W2079779662C2524010 @default.
• W2079779662 hasConceptScore W2079779662C2780934509 @default.
• W2079779662 hasConceptScore W2079779662C2982854487 @default.
• W2079779662 hasConceptScore W2079779662C2989005 @default.
• W2079779662 hasConceptScore W2079779662C3017588741 @default.
• W2079779662 hasConceptScore W2079779662C33923547 @default.
• W2079779662 hasConceptScore W2079779662C62520636 @default.
• W2079779662 hasConceptScore W2079779662C71924100 @default.
• W2079779662 hasConceptScore W2079779662C74050887 @default.
• W2079779662 hasConceptScore W2079779662C90774946 @default.
• W2079779662 hasConceptScore W2079779662C94915269 @default.
• W2079779662 hasIssue "3" @default.
• W2079779662 hasLocation W20797796621 @default.
• W2079779662 hasLocation W20797796622 @default.
• W2079779662 hasOpenAccess W2079779662 @default.
• W2079779662 hasPrimaryLocation W20797796621 @default.
• W2079779662 hasRelatedWork W1966801408 @default.
• W2079779662 hasRelatedWork W1984506208 @default.
• W2079779662 hasRelatedWork W1994394832 @default.
• W2079779662 hasRelatedWork W2058069207 @default.
• W2079779662 hasRelatedWork W2070667509 @default.
• W2079779662 hasRelatedWork W2073777833 @default.
• W2079779662 hasRelatedWork W2079779662 @default.
• W2079779662 hasRelatedWork W2085206145 @default.
• W2079779662 hasRelatedWork W2417033430 @default.
• W2079779662 hasRelatedWork W2738790871 @default.
• W2079779662 hasVolume "63" @default.
• W2079779662 isParatext "false" @default.
• W2079779662 isRetracted "false" @default.
• W2079779662 magId "2079779662" @default.
• W2079779662 workType "article" @default.