FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2122853529> ?p ?o ?g. }

• W2122853529 endingPage "516" @default.
• W2122853529 startingPage "515" @default.
• W2122853529 abstract "A definitive method for representing isodose patterns around radioactive sources has been sought for many years. Tsien and Robbins (1) used the Sabattier effect (photographic image reversal phenomenon) with some success. Bogardus, White, and Powers (2) and Hertsch and Maris (3) described electromechanical devices to scan films and print isodensity contours. Tochilin (4) used densitometry for measuring radiation fields surrounding multiple radium sources. Miller, Parsons, and Kofsky (5) used microdensitometer scanning technics to examine density patterns on industrial and medical radiographs, photographic negatives, and even biological specimens. They describe density contour mapping, using an automatic “isodensitracer”2 (IDT). The isodensity tracer is designed to scan a transparency and record the photodensity distribution. The recording pen changes its symbol whenever the density (or object brightness) changes by a small preselected density increment. As the density along a scan decreases, the pen prints a solid line until the limit of this discrete density increment is reached. For the next density increment, a series of equally spaced dots are printed. A blank space is used for the third increment, and the pattern, line-dots-blank, is repeated as long as the density is decreasing. For increasing density, the pattern is reversed (i.e., blank-dots-line). From a series of successive parallel scans, one can quickly visualize an isodensity contour map. Hilger (6) suggested this method as ideal for studying the isodose distribution patterns around radiotherapy applicators and sources. The first example shows an IDT contour map of one side of an Ernst applicator containing a total of 35 mg of radium (Fig. 1). A 5 × 7-in. sheet of Kodak industrial Type M film was placed along the mid-plane and exposed for sixty minutes. A “cut-out” was made in the film for the applicator arm. Both the film and “cut-out” were processed, using standard technics. The “cut-out” was replaced in the film to eliminate edge effects for scans over this area. Figure 2 shows two isodensity tracings from an autoradiograph made with a 3 mg radium needle. Even though the source is unevenly loaded (Fig. 2, B), the IDT contours show that the irregularities along the length of the source cannot be detected beyond 4 to 5 mm. More interesting, however, is the amount of detail obtained by this method. One needs only to vary the IDT settings to view details adjacent to or at a particular distance from the source. Since this procedure gives a more detailed presentation than any other currently known, the IDT can be employed in conjunction with dosimetry methods for routine quality control of new sources. Other possible uses include the plotting of multi-source implant patterns, making comparisons with computer data, correlating experimental data with existing tables, and comparing the isodose patterns of various radionuclides." @default.
• W2122853529 created "2016-06-24" @default.
• W2122853529 creator A5018914559 @default.
• W2122853529 creator A5025828703 @default.
• W2122853529 date "1967-09-01" @default.
• W2122853529 modified "2023-10-18" @default.
• W2122853529 title "Photographic Representation of Isodose Patterns by Isodensity Tracing" @default.
• W2122853529 doi "https://doi.org/10.1148/89.3.515" @default.
• W2122853529 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/6034923" @default.
• W2122853529 hasPublicationYear "1967" @default.
• W2122853529 type Work @default.
• W2122853529 sameAs 2122853529 @default.
• W2122853529 citedByCount "0" @default.
• W2122853529 crossrefType "journal-article" @default.
• W2122853529 hasAuthorship W2122853529A5018914559 @default.
• W2122853529 hasAuthorship W2122853529A5025828703 @default.
• W2122853529 hasConcept C120665830 @default.
• W2122853529 hasConcept C121332964 @default.
• W2122853529 hasConcept C121684516 @default.
• W2122853529 hasConcept C136496925 @default.
• W2122853529 hasConcept C153294291 @default.
• W2122853529 hasConcept C159985019 @default.
• W2122853529 hasConcept C192562407 @default.
• W2122853529 hasConcept C198352243 @default.
• W2122853529 hasConcept C2524010 @default.
• W2122853529 hasConcept C2778089247 @default.
• W2122853529 hasConcept C2779751349 @default.
• W2122853529 hasConcept C2781186391 @default.
• W2122853529 hasConcept C2989005 @default.
• W2122853529 hasConcept C33923547 @default.
• W2122853529 hasConcept C41008148 @default.
• W2122853529 hasConcept C52119771 @default.
• W2122853529 hasConcept C71924100 @default.
• W2122853529 hasConcept C86069527 @default.
• W2122853529 hasConceptScore W2122853529C120665830 @default.
• W2122853529 hasConceptScore W2122853529C121332964 @default.
• W2122853529 hasConceptScore W2122853529C121684516 @default.
• W2122853529 hasConceptScore W2122853529C136496925 @default.
• W2122853529 hasConceptScore W2122853529C153294291 @default.
• W2122853529 hasConceptScore W2122853529C159985019 @default.
• W2122853529 hasConceptScore W2122853529C192562407 @default.
• W2122853529 hasConceptScore W2122853529C198352243 @default.
• W2122853529 hasConceptScore W2122853529C2524010 @default.
• W2122853529 hasConceptScore W2122853529C2778089247 @default.
• W2122853529 hasConceptScore W2122853529C2779751349 @default.
• W2122853529 hasConceptScore W2122853529C2781186391 @default.
• W2122853529 hasConceptScore W2122853529C2989005 @default.
• W2122853529 hasConceptScore W2122853529C33923547 @default.
• W2122853529 hasConceptScore W2122853529C41008148 @default.
• W2122853529 hasConceptScore W2122853529C52119771 @default.
• W2122853529 hasConceptScore W2122853529C71924100 @default.
• W2122853529 hasConceptScore W2122853529C86069527 @default.
• W2122853529 hasIssue "3" @default.
• W2122853529 hasLocation W21228535291 @default.
• W2122853529 hasLocation W21228535292 @default.
• W2122853529 hasOpenAccess W2122853529 @default.
• W2122853529 hasPrimaryLocation W21228535291 @default.
• W2122853529 hasRelatedWork W1519318198 @default.
• W2122853529 hasRelatedWork W2041587714 @default.
• W2122853529 hasRelatedWork W2056780279 @default.
• W2122853529 hasRelatedWork W2066744240 @default.
• W2122853529 hasRelatedWork W2083234420 @default.
• W2122853529 hasRelatedWork W2095339697 @default.
• W2122853529 hasRelatedWork W2115884259 @default.
• W2122853529 hasRelatedWork W2261644864 @default.
• W2122853529 hasRelatedWork W2374762495 @default.
• W2122853529 hasRelatedWork W764777563 @default.
• W2122853529 hasVolume "89" @default.
• W2122853529 isParatext "false" @default.
• W2122853529 isRetracted "false" @default.
• W2122853529 magId "2122853529" @default.
• W2122853529 workType "article" @default.