PMID: 9531384Apr 8, 1998Paper

Multiple machine implementation of enhanced dynamic wedge

International Journal of Radiation Oncology, Biology, Physics
E E KleinJ A Purdy

Abstract

After acquiring 4 years of experience with Dynamic Wedge, a software-driven one-dimensional (1D) compensation system, we implemented a new software version called Enhanced Dynamic Wedge (EDW). The EDW allows larger (30 cm) and asymmetric field sizes and additional angles for wedged fields. We implemented this software on four similar dual-energy accelerators that also possess upper and lower physical wedge sets. Our goal was to implement EDW with one common wedge factor (WF) table and one set of treatment-planning files. We measured WFs with an ionization chamber and isodose profiles with both film and a diode array. We used a calculation scheme that requires only entry of the wedge angle and fixed jaw value. Filters for computerized treatment planning were configured for each wedge angle. We also examined to what degree the multileaf collimation (MLC) orientation, which is orthogonal to the EDW direction, was compromised for specific treatment sites. As a comparative test, we examined the dosimetric consistency for the 8 sets of physical wedges on the four machines. Finally, we updated our DW quality assurance program for EDW. The measured EDW WF was common for all four machines to within +/- 1.5% and the calculation scheme he...Continue Reading

References

Sep 1, 1985·Physics in Medicine and Biology·P L Petti, R L Siddon
Dec 1, 1995·International Journal of Radiation Oncology, Biology, Physics·E E KleinJ A Purdy
Feb 1, 1995·International Journal of Radiation Oncology, Biology, Physics·E E KleinJ A Purdy
Jan 1, 1996·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·E E KleinJ A Purdy
Mar 1, 1997·International Journal of Radiation Oncology, Biology, Physics·Z Li, E E Klein

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Citations

Jun 17, 2000·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·M MiftenS Broad
May 16, 2003·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Phil W KokenJohan P Cuijpers
Oct 12, 2010·Journal of Medical Physics·Ehab M AttallaIsmail El-Desoky
Jul 1, 2010·Journal of Medical Physics·Michael S Gossman, Subhash C Sharma
Dec 30, 1998·International Journal of Radiation Oncology, Biology, Physics·E E KleinJ A Purdy
Oct 9, 2009·Medical Physics·Eric E KleinUNKNOWN Task Group 142, American Association of Physicists in Medicine
Jul 28, 2007·Medical Physics·Sujatha PaiUNKNOWN American Association of Physics in Medicine
Aug 18, 2000·Medical Physics·M H PhillipsP S Cho
Aug 9, 2003·Medical Physics·Chihray LiuJatinder R Palta
Oct 10, 2008·Medical Physics·Indra J DasUNKNOWN TG-106 of the Therapy Physics Committee of the AAPM
May 22, 2009·Journal of Applied Clinical Medical Physics·Massimo PasquinoF Ozzello
Dec 19, 2003·Physics in Medicine and Biology·Chee-Wai ChengIndra J Das
Dec 1, 2000·Physics in Medicine and Biology·A SethiG P Glasgow
Dec 25, 2015·Journal of Applied Clinical Medical Physics·Christopher F Njeh
Jan 24, 2003·Journal of Applied Clinical Medical Physics·K L PradoR G Lane
Jul 5, 2003·Journal of Applied Clinical Medical Physics·B D Wichman
Jun 9, 2005·Journal of Applied Clinical Medical Physics·Laura Drever, Peter Dickof
Sep 7, 2005·Journal of Applied Clinical Medical Physics·Jingeng Zhu

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