Whole-limb irradiation of the lower calf using a six-field electron technique

Wooden, Kendra K.; Hogstrom, Kenneth R.; Blum, Pamela; Gastorf, Robert J.; Cox, James D.

doi:10.1016/s0958-3947(96)00129-x

Cited by 11 publications

(10 citation statements)

References 4 publications

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“…This technique has been discussed by Wooden et al who applied it to irradiating the lower calf of a patient with Kaposi's sarcoma. 200…”

Section: Viiil2 Overview Of Techniquementioning

confidence: 99%

“…202 Third, the average maximum dose along each radius is approximately 2.55 times the given dose of each of the six fields for the linac in this study and 5 MeV electrons. 200 Hence, the monitor units ͑U͒ for each of the six single fields to deliver the prescription dose ͑D prescribed ͒ to the X% isodose contour can be given by where ͑D / U͒ s is the absorbed dose per monitor unit for the single, 105 cm SSD, 17ϫ 31 cm 2 , 5 MeV electron beam incident on a flat water phantom. It must be stressed that the factor of 2.55 in Eq.…”

Section: Viiil4 Treatment Planningmentioning

confidence: 99%

“…It must be stressed that the factor of 2.55 in Eq. ͑20͒ is only applicable to the linac, accessories, and beam energy associated with the quoted study 200 and can differ significantly from this value. This factor must be measured for each particular radiation situation with the accessories that are to be used and a phantom whose cylindrical size approximates the limb to be treated.…”

Section: Viiil4 Treatment Planningmentioning

confidence: 99%

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Recommendations for clinical electron beam dosimetry: Supplement to the recommendations of Task Group 25

et al. 2009

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The goal of Task Group 25 (TG-25) of the Radiation Therapy Committee of the American Association of.Physicists in Medicine (AAPM) was to provide a methodology and set of procedures for a medical physicist performing clinical electron beam dosimetry in the nominal energy range of 5-25 MeV. Specifically, the task group recommended procedures for acquiring basic information required for acceptance testing and treatment planning of new accelerators with therapeutic electron beams. Since the publication of the TG-25 report, significant advances have taken place in the field of electron beam dosimetry, the most significant being that primary standards laboratories around the world have shifted from calibration standards based on exposure or air kerma to standards based on absorbed dose to water. The AAPM has published a new calibration protocol, TG-51, for the calibration of high-energy photon and electron beams. The formalism and dosimetry procedures recommended in this protocol are based on the absorbed dose to water calibration coefficient of an ionization chamber at 60Co energy, N60Co(D,w), together with the theoretical beam quality conversion coefficient k(Q) for the determination of absorbed dose to water in high-energy photon and electron beams. Task Group 70 was charged to reassess and update the recommendations in TG-25 to bring them into alignment with report TG-51 and to recommend new methodologies and procedures that would allow the practicing medical physicist to initiate and continue a high quality program in clinical electron beam dosimetry. This TG-70 report is a supplement to the TG-25 report and enhances the TG-25 report by including new topics and topics that were not covered in depth in the TG-25 report. These topics include procedures for obtaining data to commission a treatment planning computer, determining dose in irregularly shaped electron fields, and commissioning of sophisticated special procedures using high-energy electron beams. The use of radiochromic film for electrons is addressed, and radiographic film that is no longer available has been replaced by film that is available. Realistic stopping-power data are incorporated when appropriate along with enhanced tables of electron fluence data. A larger list of clinical applications of electron beams is included in the full TG-70 report available at http://www.aapm.org/pubs/reports. Descriptions of the techniques in the clinical sections are not exhaustive but do describe key elements of the procedures and how to initiate these programs in the clinic. There have been no major changes since the TG-25 report relating to flatness and symmetry, surface dose, use of thermoluminescent dosimeters or diodes, virtual source position designation, air gap corrections, oblique incidence, or corrections for inhomogeneities. Thus these topics are not addressed in the TG-70 report.

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“…This technique has been discussed by Wooden et al who applied it to irradiating the lower calf of a patient with Kaposi's sarcoma. 200…”

Section: Viiil2 Overview Of Techniquementioning

confidence: 99%

Section: Viiil4 Treatment Planningmentioning

confidence: 99%

Section: Viiil4 Treatment Planningmentioning

confidence: 99%

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Recommendations for clinical electron beam dosimetry: Supplement to the recommendations of Task Group 25

et al. 2009

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“…Electron beam therapy is an integral part of treatment plans for a wide variety of tumor sites. [1][2][3][4] Most of the electron therapy treatments are performed using the nominal SSD of 100 cm. Performing electron therapy treatments at extended SSD occasionally becomes necessary, due to either anatomic restrictions or to obtain larger field sizes.…”

Section: Introductionmentioning

confidence: 99%

Output calculation of electron therapy at extended SSD using an improved LBR method

et al. 2015

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“…The rapid dose deposition of electron beams followed by a characteristic sharp drop-off of dose as a function of depth makes electron therapy an important treatment option in radiation oncology. [1][2][3][4] Accurate and fast calculation of the dose distribution from irregularly shaped cutouts is critical to the clinical implementation of electron therapy. This calculation has a complex dependence on the shape and energy of the electron beam as the beam travels from the accelerator head to the patient.…”

Section: Introductionmentioning

confidence: 99%

Dose calculation for electron therapy using an improved LBR method

2013

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In this research, it is shown that the lateral spread parameter σR(z) increases with cutout size. For radii of circular cutout sizes up to the equilibrium range of the electron beam, the increase of σR(z) with the cutout size is linear. The percentage difference of the calculated PDD curve from the measured PDD data for irregularly shaped cutouts was under 1.0% in the region between the surface and therapeutic range of the electron beam. Similar results were obtained for four electron beam energies (6, 9, 12, and 15 MeV).

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Whole-limb irradiation of the lower calf using a six-field electron technique

Cited by 11 publications

References 4 publications

Recommendations for clinical electron beam dosimetry: Supplement to the recommendations of Task Group 25

Recommendations for clinical electron beam dosimetry: Supplement to the recommendations of Task Group 25

Output calculation of electron therapy at extended SSD using an improved LBR method

Dose calculation for electron therapy using an improved LBR method

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