Quality Assurance of Radiation Therapy Planning Systems: Current Status and Remaining Challenges

Dyk, Jacob Van

doi:10.1016/j.ijrobp.2007.04.095

Cited by 23 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yet for incidence of 50 degrees, Figures 7D and Figure 8E show that the corresponding differences are ±1~2%, ±6~8% and ±2~3% (Table 2). It is known that TPS based on Monte Carlo algorithm may compromise the accuracy for calculation speed and also that the TPS is tuned to reproduce the input measurements (Van Dyk, 2008, Jamema et al, 2008), typically made with cylindrical ionization chambers. Secondly, in TPS, dose is generally calculated in voxelised volume from the CT scan.…”

Section: 0 Discussionmentioning

confidence: 99%

Superficial dosimetry imaging of Čerenkov emission in electron beam radiotherapy of phantoms

Zhang¹,

Fox²,

Glaser³

et al. 2013

Phys. Med. Biol.

View full text Add to dashboard Cite

Čerenkov emission is generated from ionizing radiation in tissue above 264keV energy. This study presents the first examination of this optical emission as a surrogate for the absorbed superficial dose. Čerenkov emission was imaged from the surface of flat tissue phantoms irradiated with electrons, using a range of field sizes from 6cm×6cm to 20cm×20cm, incident angles from 0 to 50 degrees, and energies from 6 to 18 MeV. The Čerenkov images were compared with estimated superficial dose in phantoms from direct diode measurements, as well as calculations by Monte Carlo and the treatment planning system. Intensity images showed outstanding linear agreement (R2=0.97) with reference data of the known dose for energies from 6MeV to 18MeV. When orthogonal delivery was done, the in-plane and cross-plane dose distribution comparisons indicated very little difference (±2~4% differences) between the different methods of estimation as compared to Čerenkov light imaging. For an incident angle 50 degrees, the Čerenkov images and Monte Carlo simulation show excellent agreement with the diode data, but the treatment planning system (TPS) had at a larger error (OPT=±1~2%, Diode=±2~3%, TPS=±6~8% differences) as would be expected. The sampling depth of superficial dosimetry based on Čerenkov radiation has been simulated in layered skin model, showing the potential of sampling depth tuning by spectral filtering. Taken together, these measurements and simulations indicate that Čerenkov emission imaging might provide a valuable way to superficial dosimetry imaging from incident radiotherapy beams of electrons.

show abstract

Section: 0 Discussionmentioning

confidence: 99%

Superficial dosimetry imaging of Čerenkov emission in electron beam radiotherapy of phantoms

Zhang¹,

Fox²,

Glaser³

et al. 2013

Phys. Med. Biol.

View full text Add to dashboard Cite

show abstract

“…The focus of this document is contained in Tables 1 and 2 and their associated notes which specify the routine quality control standards to be followed. More detailed descriptions of TPSs and in particular, commissioning activities and quality assurance, can be found in the source document9 and other related references 10, 11, 12, 13, 14, 15…”

Section: System Descriptionmentioning

confidence: 99%

“…It is worth noting that the rapid evolution of radiation treatment technologies presents significant challenges on the quality assurance and quality control of TPSs. Some of these challenges are related to the dose optimization processes and their corresponding algorithms (as used in IMRT), dose reconstruction, four‐dimensional calculations, treatments and all their associated phantoms, and quality assurance tools 15, 16…”

Section: System Descriptionmentioning

confidence: 99%

COMP report: CPQR technical quality control guidelines for treatment planning systems

Villarreal-Barajas

2018

J Applied Clin Med Phys

View full text Add to dashboard Cite

The Canadian Organization of Medical Physicists (COMP), in close partnership with the Canadian Partnership for Quality Radiotherapy (CPQR) has developed a series of Technical Quality Control (TQC) guidelines for radiation treatment equipment. These guidelines outline the performance objectives that equipment should meet in order to ensure an acceptable level of radiation treatment quality. The TQC guidelines have been rigorously reviewed and field tested in a variety of Canadian radiation treatment facilities. The development process enables rapid review and update to keep the guidelines current with changes in technology. This article contains detailed performance objectives and safety criteria for Treatment Planning Systems (TPS) for External Beam Radiotherapy.

show abstract

“…A difference of more than 5% This NCS report has been downloaded on 12 May 2018 requires an immediate action. In high dose-gradients, a 3 mm spatial agreement criterion is recommended as stated by Van Dyk (Van Dyk, 2008;Van Dyk et al, 1993) and TG-119 report (Ezzell et al, 2009). Dosimetric verification of helical standard treatment plans should be performed weekly for one configuration (2.5 cm field size, off-axis target) and after any upgrade/update of the TPS for all commissioned field sizes.…”

Section: Tomotherapymentioning

confidence: 99%

NCS Report 27: Quality assurance for Tomotherapy systems

Althof¹,

Ost²,

Reynaert³

et al. 2017

View full text Add to dashboard Cite

Quality Assurance of Radiation Therapy Planning Systems: Current Status and Remaining Challenges

Cited by 23 publications

References 13 publications

Superficial dosimetry imaging of Čerenkov emission in electron beam radiotherapy of phantoms

Superficial dosimetry imaging of Čerenkov emission in electron beam radiotherapy of phantoms

COMP report: CPQR technical quality control guidelines for treatment planning systems

NCS Report 27: Quality assurance for Tomotherapy systems

Contact Info

Product

Resources

About