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Beitrag zur Filmdosimetrie energiereicher Strahlen
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Journal Article
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Progress Report
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Strahlentherapie; v. 141(2); p. 176-184
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AbstractAbstract
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Progress Report
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Health Physics; v. 20(2); p. 205-212
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Health Physics; v. 21(4); p. 598-602
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AbstractAbstract
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Health Physics; v. 23(6); p. 862-865
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AbstractAbstract
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Original Title
Simulation von Bewegungsbestrahlungen und Rastergroesse bei der elektronischen Berechnung von Einzelfeldern und Standardplaenen der Telekobalttherapie
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12 figs.; 6 refs.
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Journal Article
Literature Type
Progress Report
Journal
Strahlentherapie; v. 141(1); p. 56-63
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AbstractAbstract
No abstract available
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Journal Article
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Health Physics; v. 21(4); p. 553-562
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AbstractAbstract
No abstract available
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Journal Article
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Progress Report
Journal
Physics in Medicine and Biology; v.16(1); p.35-46
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AbstractAbstract
No abstract available
Original Title
Telecesium therapie en couronne
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Source
8. congress of the latin federation on medical electroradiological societies; Rio de Janeiro, Brazil; 15 Aug 1970; 16 figs.; 11 refs.
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Journal Article
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Conference
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Strahlentherapie; v. 142(4); p. 417-432
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Perez Diaz, M.; Carvalho, A. E.; Andrade, M. E.; Khoury, H. J., E-mail: mperez@uclv.edu.cu
AbstractAbstract
[en] Thirty two head CT scans were acquired employing an anthropomorphic phantom which contains small lesions in posterior fosse, using 2 scanners, one with 64 slices 'Siemens Sensation' and other with 6 slices Philip Brilliance. Parameters as Tube current (I [mA]), Collimation (C [mm]), spectrum energy (kVp) and dynamic range were changed during studies, looking for the optimal acquisition/processing conditions which permit both, good lesion detectability and the lowest dose. Air kerma (mGy) was measured with a ionization chamber and the air kerma index (Ca,100 [mGy]) was calculated as dose index. Image quality was analyzed by 5 expert criteria using a 5 points-scale (1=poor, 2=fair, 3=good, 4=very good, 5=excellent) and also using 5 Figure of merit in the spatial and frequency domains: Contrast C(%), Contrast to Noise Ratio CNR, Signal to Noise Ratio SNR, Normalized Mean Square Error (NMSE) and the Spectral Distance (SD). Objective and subjective results were correlated. We observed that doses can be diminished until a 25% respect to the usual practice with both technologies, diminishing mainly the mAs, without affecting lesion detection. As a result, we propose an optimized protocol for each scanner as follow: The use of 250 mAs, 120 kVp and the collimation of 6 slices x 1.50 mm per rotation to detect the lesions in posterior fosse with good image quality for the Philips Brilliance 6 tested, while 150 mAs, 100 kVp and slice thickness of 3 mm were needed with the Siemens Sensation 64. (Author)
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Source
Centro de Aplicaciones Tecnologicas y Desarrollo Nuclear (CEADEN), La Habana (Cuba); Instituto de Ciencias y Tecnologia de Materiales (IMRE), La Habana (Cuba); Centro Latinoamericano de Fisica (CLAF), La Habana (Cuba); Sociedad Cubana de Fisica (SCF), La Habana (Cuba); Centro de Investigaciones en Optica (CIO), La Habana (Cuba); 1 CD-ROM; ISBN 978-959-7136-98-9; 
; Feb 2013; 3 p; WONP-NURT 2013: 14. Workshop on Nuclear Physics and 8. International Symposium on Nuclear and Related Techniques; La Habana (Cuba); 5-8 Feb 2013; Available from Centro de Aplicaciones Tecnologica y Desarrollo Nuclear (CEADEN), La Habana (CU), Email: natacha@ceaden.edu.cu; Centro de Gestion de la Informacion y Desarrollo de la Energia (Cubaenergia), La Habana (CU), Email: belkis@cubaenergia.cu; 13 refs.; 3 tabs.; 6 figs.
; Feb 2013; 3 p; WONP-NURT 2013: 14. Workshop on Nuclear Physics and 8. International Symposium on Nuclear and Related Techniques; La Habana (Cuba); 5-8 Feb 2013; Available from Centro de Aplicaciones Tecnologica y Desarrollo Nuclear (CEADEN), La Habana (CU), Email: natacha@ceaden.edu.cu; Centro de Gestion de la Informacion y Desarrollo de la Energia (Cubaenergia), La Habana (CU), Email: belkis@cubaenergia.cu; 13 refs.; 3 tabs.; 6 figs.
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Multimedia
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Conference
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Curran, B.; Ramey, G.; Buscher, M.; LeMaire, M.; Wu, A.; Sternick, E.S.
Radiological Society of North America 73rd scientific assembly and annual meeting (Abstracts)
Radiological Society of North America 73rd scientific assembly and annual meeting (Abstracts)
AbstractAbstract
[en] The accuracy and limitations of ''back of the hand'' methods for estimating the effects of shielding blocks on central axis dose rates are not well known. In this poster, the authors investigated the ''equivalent short side'' method of altering the dose rate for a number of clinical setups. Dose rates obtained using this method are compared with calculations based on a Clarkson scatter summation technique (Theraplan, AECL) and with measurements in a polystyrene phantom. The results of these measurements and calculations show the treatment techniques where such methods are appropriate, and the size of the error incurred with different block placements and varying areas of the field blocked
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Secondary Subject
Source
Anon; vp; 1987; vp; Radiological Society of North America Inc; Oak Brook, IL (USA); 73. scientific assembly and annual meeting of the Radiological Society of North America; Chicago, IL (USA); 29 Nov - 4 Dec 1987
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Book
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Conference
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