An effective calibration technique for radiochromic films using a single-shot dose distribution in Gamma Knife®

Chung, Jae Pil; Oh, Se Woon; Seong, Young Min; Chun, Kook Jin; Chung, Hyun‐Tai

doi:10.1016/j.ejmp.2016.02.001

Cited by 14 publications

(7 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Type A uncertainty is statistical, and Type B uncertainty is systematic. Determination of the uncertainty in dose calibration was described in a previous study . Film‐to‐film uniformity was defined as the mean standard deviation of the OD values of calibration films.…”

Section: Resultsmentioning

confidence: 99%

“…Determination of the uncertainty in dose calibration was described in a previous study. 27 Film-to-film uniformity was defined as the mean standard deviation of the OD values of calibration films. The uncertainty from autopositioning in the dose-calculation plane was obtained by moving a measured distribution of a calibration film in 0.1 mm steps to 0.4 mm.…”

Section: C Uncertainty Analysismentioning

confidence: 99%

See 1 more Smart Citation

Verification of dose profiles generated by the convolution algorithm of the gamma knife^® radiosurgery planning system

2017

Self Cite

View full text Add to dashboard Cite

The measured accuracies of the dose distributions calculated by the convolution algorithm of the LGP were within the clinically acceptable range (GIPR ≥ 96.9%) for various configurations of collimator size, location, direction of calculation plane, and number of shots. Due to the intrinsic asymmetry in the dose distribution along the z-axis, the treatment plan should also be verified in coronal or sagittal plane.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: C Uncertainty Analysismentioning

confidence: 99%

Verification of dose profiles generated by the convolution algorithm of the gamma knife^® radiosurgery planning system

2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, the procedure must be repeated for sets of films with different numbers, even if they are of the same type. Therefore, it is desirable to develop a simple method of building a calibration curve for a new set of films using existing data without requiring repeating the calibration procedure 4) .…”

Section: Discussionmentioning

confidence: 99%

Validation of Gamma Knife Perfexion Dose Profile Distribution by a Modified Variable Ellipsoid Modeling Technique

Hur

Jin

Kim

et al. 2021

J Korean Neurosurg Soc

View full text Add to dashboard Cite

“…3. The third protocol works with D and OD as sensitometric magnitudes, while the lot calibration curve for every color channel is a polynomial curve, D = aOD 3 + bOD 2 + cOD + d, where OD = −log PV PVmax with PV max = 2 16 − 1, as described in Chung et al (2016). 4.…”

Section: Dosimetry Protocols and Recalibration Methodsmentioning

confidence: 99%

Optimizing the recalibration process in radiochromic film dosimetry

Ruiz-Morales

Vera-Sánchez²,

González‐López

2020

Phys. Med. Biol.

View full text Add to dashboard Cite

Intra-lot, inter-scan and other variabilities in radiochromic film dosimetry may have a severe impact on absolute dosimetry with this dosimeter. In the literature, several dosimetry protocols may be found characterized by different calibration functions and different film response variables. Also, the re-calibration methods found in the literature correct and minimize the impact of the variabilities in the absolute dose estimates. In this work, several recalibration methods and dosimetry protocols are evaluated. In order to find optimal configurations, their accuracy is compared, and the accuracy level that can be reached in each case is discussed. The efficient protocol and the parameter escalation are used to recalibrate EBT3 films from two different film batches. The mean absolute deviations between known doses and estimated doses for eight dose levels are obtained and compared with the self calibration of each reading, named intrinsic film calibration. Eight film sheets from two different lots and two digitizers are used. The parameter escalation method with a four-level recalibration using net optical density (NOD) and a power law as dosimetry protocol obtains the highest accuracy. Regarding the number of control strips, increasing the number from two to three makes the parameter escalation protocol to come close to intrinsic film calibration in all cases, but has a less important effect on the efficient protocol. Regardless the choice of the sensitometric variables, using the appropriate recalibration method results in accuracy levels typical of self calibration of the film. In addition, the parameter escalation method provides better results than the efficient protocol with three calibration strips.

show abstract

An effective calibration technique for radiochromic films using a single-shot dose distribution in Gamma Knife®

Cited by 14 publications

References 10 publications

Verification of dose profiles generated by the convolution algorithm of the gamma knife^® radiosurgery planning system

Verification of dose profiles generated by the convolution algorithm of the gamma knife^® radiosurgery planning system

Validation of Gamma Knife Perfexion Dose Profile Distribution by a Modified Variable Ellipsoid Modeling Technique

Optimizing the recalibration process in radiochromic film dosimetry

Contact Info

Product

Resources

About

An effective calibration technique for radiochromic films using a single-shot dose distribution in Gamma Knife®

Cited by 14 publications

References 10 publications

Verification of dose profiles generated by the convolution algorithm of the gamma knife® radiosurgery planning system

Verification of dose profiles generated by the convolution algorithm of the gamma knife® radiosurgery planning system

Validation of Gamma Knife Perfexion Dose Profile Distribution by a Modified Variable Ellipsoid Modeling Technique

Optimizing the recalibration process in radiochromic film dosimetry

Contact Info

Product

Resources

About

Verification of dose profiles generated by the convolution algorithm of the gamma knife^® radiosurgery planning system

Verification of dose profiles generated by the convolution algorithm of the gamma knife^® radiosurgery planning system