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Acceptance testing and quality assurance of automated scanning film densitometers used in the dosimetry of electron and photon therapy beams


, : Acceptance testing and quality assurance of automated scanning film densitometers used in the dosimetry of electron and photon therapy beams. Medical Physics 10(5): 698-700

Scanning film densitometry routinely used for obtaining dosimetric information about therapy treatment beams is subject to several sources of inaccuracies. The most significant of these are described and appropriate methods of testing are presented. This establishes the need for adequate acceptance testing followed by a quality assurance program if these devices are to be used to provide accurate relative dose information over extended periods of time.

US$19.90

PMID: 6646080

DOI: 10.1118/1.595407


Other references

Song, S.J.; Shroff, S.G., 2017: Idiopathic Myointimal Hyperplasia of Mesenteric Veins of the Ileum and Colon in a Patient with Crohn's Disease: A Case Report and Brief Review of the Literature. Idiopathic myointimal hyperplasia of the mesenteric veins (IMHMV) is a rare disease characterized by intimal smooth muscle proliferation, leading to the thickening of small to medium-sized mesenteric veins. This vascular disease mimics inflammator...

Pallis, E.; Thermos, K.; Spyraki, C., 2001: Chronic desipramine treatment selectively potentiates somatostatin-induced dopamine release in the nucleus accumbens. Dopamine and somatostatin have been implicated in the pathophysiology of depression. We have employed in vivo microdialysis to investigate the regulation of dopamine release by somatostatin in the nucleus accumbens and the striatum of awake, freel...

Malik, S.M.; Collins, B.; Pishvaian, M.; Ramzi, P.; Marshall, J.; Hwang, J., 2011: A phase I trial of bexarotene in combination with docetaxel in patients with advanced solid tumors. The purpose of this study was to identify dose-limiting toxicity (DLT) and maximum tolerated dose (MTD) of docetaxel with a fixed-dose of bexarotene. This was a phase I, single-center and open-label trial of dose-escalating docetaxel with a fixed-...

Bocco, F.; Langan, P.; Charnley, J., 1977: Changes in the calcar femoris in relation to cement technology in total hip replacement. Radiological changes in the calcar femoris after total hip replacement, in 97 hips where an extreme valgus position of the prosthesis had been achieved, were compared with 119 hips where the alignment of the prosthesis ranged from varus to only a...

Thompson Allan M., 1972: Shallow-Water Distal Turbidites in Ordovician Flysch, Central Appalachian Mountains, U. S. A. Reedsville Formation, sandstones and silty shales, low energy currents, thin-shelled invertebrates, graded bedding, gentle slopes.

Taylor, DB., 1983: Speciation in the Aedes triseriatus species complex. Dissertation Abstracts International B Sciences and Engineering, 4310: 3130

Hiremath, P.; Bauer, M.; Cheng, H-Wen.; Unno, K.; Liao, R.; Cheng, S., 2014: Ultrasonic assessment of myocardial microstructure. Echocardiography is a widely accessible imaging modality that is commonly used to noninvasively characterize and quantify changes in cardiac structure and function. Ultrasonic assessments of cardiac tissue can include analyses of backscatter signa...

Durio W.O.; Manter H.W., 1969: Some digenetic trematodes of marine fishes of new caledonia iii acanthocolipidae haploporidae glyliauchenidae and cryptogonimidae isorchis parvus new genus new species stephanostomum japonocasum new species atractotrema sigani new species paracryptogonimus prouitellosus new species paracryptogonimus longitestis new species paracryptogonimus catalae new species paracryptogonimus testitactus new species siphoderina paracatalae new species. Journal of Parasitology 55(2): 293-300

Roma, M.G.; Crocenzi, F.A.; Rodriguez Garay, E.A., 1996: Does paracellular permeability play a role in cholephilic dye-induced cholestasis?. Changes in hepatic paracellular permeability were investigated during the development of cholephilic dye-induced cholestasis in rats. For this purpose, four dyes with different cholestatic potency (phenol red, sulfobromophthalein, bromcresol green...

Annette M.O.ivarez; Robert M.O.en, 1991: The europium anomaly of seawater; implications for fluvial versus hydrothermal REE inputs to the oceans. Seafloor hydrothermal vent fluids are characterized by rare earth element (REE) enrichments and large positive Eu anomalies; however, this input is not recorded by seawater. Hydrothermal sediments from the southeast Pacific (DSDP Site 598) were ex...