Quantitative assessment of beam perturbations caused by silicon diodes used for in vivo dosimetry

Sen, Arijit; Parsai, E; McNeeley, Shawn; Ayyangar, Komanduri M.

doi:10.1016/s0360-3016(96)00279-9

Cited by 30 publications

(34 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sen et al reported 23% of the volume in a 4 ϫ 4 cm 2 field receiving a 10% less dose for a 6 MV photon beam. 10 It is therefore expected that, for a given patient setup and in vivo dosimetry system, the probability of tumor control will be affected by the frequency of in vivo dosimetry. However, no clear recommendations exist for the optimum frequency of in vivo dosimetry, based on a consideration of the dose reduction in part of the PTV, caused by the in vivo detectors, and its biological effect.…”

Section: Introductionmentioning

confidence: 99%

Correction factors for low perturbation in vivo diodes used in the determination of entrance doses in high energy photon beams

Roberts

Philp

2007

Medical Physics

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Correction factors for low perturbation in vivo diodes used in the determination of entrance doses in high energy photon beams

Roberts

Philp

2007

Medical Physics

View full text Add to dashboard Cite

show abstract

“…Different SSDs 85, 80 and 75 cm and FSs 5 3 5, 10 3 10 and 15 3 15 cm 2 were included in calculation of this factor for irradiation time of 0?72 minutes calculated for 50 cGy at d max at 10 3 10 cm 2 . Different SSDs 85, 80 and 75 cm and FSs 5 3 5, 10 3 10 and 15 3 15 cm 2 were included in calculation of this factor for irradiation time of 0?72 minutes calculated for 50 cGy at d max at 10 3 10 cm 2 .…”

Section: Block Tray Correction Factor (Cf Tray )mentioning

confidence: 99%

“…[1][2][3][4][5][6][7] The diode signal depends upon photon energy, dose rate, temperature, geometric parameters, phantom scatter; head scatter electrons and build up cap. The intention is to replace thermo luminescent dosimeter, which is a passive dosimeter, time consuming, and is an inconvenient method for patient dose verification/monitoring.…”

Section: Introductionmentioning

confidence: 99%

A study of dosimetric characteristics for in vivo dosimetry with cylindrical n-type Isorad diode

Islam

Haque²,

Muhammad³

et al. 2013

J Radiother Pract

View full text Add to dashboard Cite

Background and purpose: The objective was to determine diode characteristics before actual dose verification on human phantom and patients. Materials and methods:The reliability and stability of equipment, signal stability, precision, dose response linearity, field flatness, perturbation of radiation dose, plastic to water conversion factor (K pl ), ionisation chambers (ICs) and diode calibration were determined. Correction factors for tray (CF tray ), wedge (CF wedge ), field size (CF FS ), SSD (CF SSD ), angle (CF angle ) and block (CF block ) were found. Patient dose monitor, Isorad diode (n-type) and IC (PTW Frieburg), Co-60 unit (Theratron), ATOM Adult male human phantom (Model 701-D, CIRS) were used.Results and conclusion: Good signal stability, precise data, and linear dose response, variation of 0?500% and 5?000% in field flatness and perturbation tests, respectively, were noted. K pl was 1?006 for IC PTW Frieburg TW30013, 0114. The diode calibration factor was 0?989. CF tray , CF FS , CF SSD , CF angle , CF block were 1?001, 1?001, 0?997, 1?006 and 0?990, respectively. CF wedge were 1?024, 1?030 and 1?038 for 308, 458 and 608 wedges, respectively. The verification of above correction factors (CFs) on Nasopharynx and lung of human phantom was also done.

show abstract

“…Larger heads may induce attenuation and alteration of beam characteristics, which in tum would impact on the dose distribution. The latter effect has been studied by several authors, using silicon diodes [36,37]. Moreover, small size sensors can be used when the space nm band which corresponds to the maximum of the emission of SrS:Ce,Sm (i.e.…”

Section: Optics and Electronics Readoutmentioning

confidence: 99%

Real-time fibered optically stimulated luminescence dosimeter based on SrS:Ce,Sm phosphor

Benoit

Garcia²,

Matias-Vaille³

et al. 2007

2007 9th European Conference on Radiation and Its Effects on Components and Systems

View full text Add to dashboard Cite

A novel real-time optical fibered dosimetry system based on optically stirn ulated luminescence (OSL) of SrS:Ce,Sm phosphor was developed and is presented. The advantages of this system are the combination of OSL and optical fibers, immediate readout, simplicity of use, low cost, reliability, flexibility, and robustness. Experimental results show an excellent linearity with the dose (0.01 to 6 Gy), repeatability better than 2%, radiation sensitivity up to 80 mV.cGy-l and accuracy since error on dose is less than 5%. The applications targeted are the measurement of the dose delivered during a treatment in radiation therapy and the monitoring of the dose or dose-rate around or in nuclear reactor and accelerator facilities in high energy physics. Further experiments are still to be conducted in order to fully characterize the system and evaluate the feasibility of each application mentioned.

show abstract

Quantitative assessment of beam perturbations caused by silicon diodes used for in vivo dosimetry

Cited by 30 publications

References 10 publications

Correction factors for low perturbation in vivo diodes used in the determination of entrance doses in high energy photon beams

Correction factors for low perturbation in vivo diodes used in the determination of entrance doses in high energy photon beams

A study of dosimetric characteristics for in vivo dosimetry with cylindrical n-type Isorad diode

Real-time fibered optically stimulated luminescence dosimeter based on SrS:Ce,Sm phosphor

Contact Info

Product

Resources

About