Methodology for radiochromic film analysis using FilmQA Pro and ImageJ

Howard, Michelle E.; Herman, Michael; Grams, Michael P.

doi:10.1371/journal.pone.0233562

Cited by 33 publications

(31 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Film measurements were performed with Gafchromic EBT3 film and analyzed with FilmQA Pro software (Ashland, Bridgewater, NJ, USA) following a previously published single scan, triple channel dosimetry protocol 21 . Film was placed inside of the cork lung insert in a coronal plane through the center of the solid water lesion.…”

Section: Methodsmentioning

confidence: 99%

Implementation of free breathing respiratory amplitude‐gated treatments

Hickling

Veres

Moseley

et al. 2021

J Applied Clin Med Phys

Self Cite

View full text Add to dashboard Cite

The purpose of this study was to provide guidance in developing and implementing a process for the accurate delivery of free breathing respiratory amplitude-gated treatments.Methods: A phase-based 4DCT scan is acquired at time of simulation and motion is evaluated to determine the exhale phases that minimize respiratory motion to an acceptable level. A phase subset average CT is then generated for treatment planning and a tracking structure is contoured to indicate the location of the target or a suitable surrogate over the planning phases. Prior to treatment delivery, a 4DCBCT is acquired and a phase subset average is created to coincide with the planning phases for an initial match to the planning CT. Fluoroscopic imaging is then used to set amplitude gate thresholds corresponding to when the target or surrogate is in the tracking structure. The final imaging prior to treatment is an amplitude-gated CBCT to verify both the amplitude gate thresholds and patient positioning. An amplitude-gated treatment is then delivered. This technique was commissioned using an in-house lung motion phantom and film measurements of a simple two-field 3D plan.Results: The accuracy of 4DCBCT motion and target position measurements were validated relative to 4DCT imaging. End to end testing showed strong agreement between planned and film measured dose distributions. Robustness to interuser variability and changes in respiratory motion were demonstrated through film measurements. Conclusions:The developed workflow utilizes 4DCBCT, respiratory-correlated fluoroscopy, and gated CBCT imaging in an efficient and sequential process to ensure the accurate delivery of free breathing respiratory-gated treatments. | INTRODUCTIONRespiratory motion management is an important strategy to account for breathing-induced target motion during radiation therapy. 1 If not considered during both the treatment planning and delivery processes, respiratory motion can lead to artifacts and target volumes that do not adequately encompass the target. Active respiratory motion management techniques can be used to minimize target motion during treatment delivery, allowing for a reduction in target volumes and improved normal tissue sparing. Such techniques include abdominal compression, 2 breath hold, 3 and free breathing phase or amplitude gating. 4 Many thoracic and abdominal sites are susceptible to substantial motion, with abdominal and lower lung lesion motion often measured to be greater than 1 cm. 5,6 Inter-and intrafraction changes in target motion magnitude greater than 5 mm have been

show abstract

Section: Methodsmentioning

confidence: 99%

Implementation of free breathing respiratory amplitude‐gated treatments

Hickling

Veres

Moseley

et al. 2021

J Applied Clin Med Phys

Self Cite

View full text Add to dashboard Cite

show abstract

“…FilmQA Pro software from Ashland Inc. is specifically designed for Gafchromic™ film measurements in quality assurance (QA) medical applications and it uses a proprietary multichannel algorithm to remove non-dose contributions [78,79]. Howard et al described the analysis procedures with both FilmQA Pro and ImageJ software, by achieving ±2% accuracy with both software [80]. RisøScan is a software package based on LabView that can be used for analysis of Risø B3 and FWT RCFs, as well as for Gafchromic™ films [81,82].…”

Section: Flatbed Scannersmentioning

confidence: 99%

Radiochromic Films for the Two-Dimensional Dose Distribution Assessment

Casolaro

2021

Applied Sciences

View full text Add to dashboard Cite

Radiochromic films are mainly used for two-dimensional dose verification in photon, electron, and proton therapy treatments. Moreover, the radiochromic film types available today allow their use in a wide dose range, corresponding to applications from low-medical diagnostics to high-dose beam profile measurements in charged particle medical accelerators. An in-depth knowledge of the characteristics of radiochromic films, of their operating principles, and of the dose reading techniques is of paramount importance to exploit all the features of this interesting and versatile radiation detection system. This short review focuses on these main aspects by considering the most recent works on the subject.

show abstract

“…Several publications [11][12][13][14][15][16] discussed the quality control of different SRS techniques and, most of them, are related to the systems Cyberknife and Gamma Knife. As the small fields used in SRS are characterized by high dose gradients, a lack of lateral particle equilibrium and a variation of energy spectra with beam sizes, a dosimeter with high resolution, tissue-equivalence and high precision is required [11].…”

Section: Introductionmentioning

confidence: 99%

“…As the small fields used in SRS are characterized by high dose gradients, a lack of lateral particle equilibrium and a variation of energy spectra with beam sizes, a dosimeter with high resolution, tissue-equivalence and high precision is required [11]. Radiochromic film has several advantageous characteristics which make it an attractive dosimeter for many clinical tasks in radiation oncology [12]. Its potential has been demonstrated in several studies in the literature [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dose distribution in a radiosurgery treatment for an acoustic neuroma

Cardoso¹,

Alves²,

Cardoso

2021

Braz. J. Rad. Sci.

View full text Add to dashboard Cite

Evaluation of the dose distribution delivered in a radiosurgery treatment of an acoustic neuroma using an adapted Alderson phantom and radiochromic film to assess absolute dose. A system was developed to perform the dose measurements, using the Alderson Rando phantom´s head carrying a modified slice, where a material reproducing the tumor was inserted. The phantom’s head with the modified slice was irradiated in a medical linear accelerator, using a procedure similar to that adopted in real cases, and radiochromic films were used to assess dose values. The suitability of the dose distribution delivered in the treatment was evaluated by comparing the Dose Volume Histograms, obtained from the Treatment Planning System (TPS) and by radiochromic film measurements. An agreement around 3% between experimental data and TPS´s calculations, showing an acceptable concordance with the planning results. The established approach of transforming 2D arrays of dose in a 3D one is satisfactory, validating it. The developed method shows to be an excellent alternative to quality control in radiosurgery using the radiochromic film to assess absolute dose.

show abstract

Methodology for radiochromic film analysis using FilmQA Pro and ImageJ

Cited by 33 publications

References 49 publications

Implementation of free breathing respiratory amplitude‐gated treatments

Implementation of free breathing respiratory amplitude‐gated treatments

Radiochromic Films for the Two-Dimensional Dose Distribution Assessment

Dose distribution in a radiosurgery treatment for an acoustic neuroma

Contact Info

Product

Resources

About