Three-Dimensional Motion of Liver Tumors Using Cine-Magnetic Resonance Imaging

Kirilova, A.; Lockwood, Gina; Choi, Perry; Bana, Neelufer; Haider, Masoom A.; Brock, Kristy K.; Eccles, C.; Dawson, Laura A.

doi:10.1016/j.ijrobp.2007.11.026

Cited by 96 publications

(89 citation statements)

References 24 publications

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“…[11][12][13][14][15] Park et al analyzed the interfraction and intrafraction liver motion variability constructing a 3-dimensional motion trajectory of the fiducial markers implanted, at different sites in the liver and as a function of the breathing cycle. They reported, for 20 patients, a range of motion of 3.0 ± 2.0 mm, 5.1 ± 3.1 mm and 17.9 ± 5.1 mm using the planning 4-dimensionnal computed tomography (4DCT), and of 2.8 ± 1.6 mm, 5.3 ± 3.1 mm, and 16.5 ± 5.7 mm using the conebeam computed tomography (CBCT), for the LR, AP and CC directions, respectively.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of reproducibility of tumor repositioning during multiple breathing cycles for liver stereotactic body radiotherapy treatment

Bedos

Riou

Aillères

et al. 2017

Reports of Practical Oncology & Radiotherapy

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a b s t r a c tAim: To evaluate the tumor repositioning during gated volumetric modulated arc therapy (VMAT) for liver stereotactic body radiotherapy(SBRT) treatment using implanted fiducial markers and intrafraction kilovoltage (kV) images acquired during dose delivery. Materials and methods:Since 2012, 47 liver cancer patients with implanted fiducial markers were treated using the gated VMAT technique with a Varian Truebeam STx linear accelerator.The fiducial markers were implanted inside or close to the tumor target before treatment simulation. They were defined at the maximum inhalation and exhalation phases on a 4-dimensionnal computed tomography (4DCT) acquisition. During the treatment, kV images were acquired just before the beam-on at each breathing cycle at maximum exhalation and inhalation phases to verify the fiducial markers positions. For the five first fractions of treatment in the first ten consecutive patients, a total of 2705 intrafraction kV images were retrospectively analyzed to assess the differences between expected and actual positions of the fiducial markers along the cranio-caudal (CC) direction during the exhalation phase. Results:The mean absolute intrafractional fiducial marker deviation along the CC direction was 1.0 mm at the maximum exhalation phase. In 99%, 95% and 90% cases, the fiducial marker deviations were ≤4.5 mm, 2.8 mm and 2.2 mm, respectively. Conclusion:Intrafraction kV images allowed us to ensure the consistency of tumor repositioning during treatment. In 99% cases, the fiducial marker deviations were ≤4.5 mm corresponding to our 5 mm treatment margin. This margin seems to be well-adapted to the gated VMAT SBRT treatment in liver disease.

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Section: Introductionmentioning

confidence: 99%

Evaluation of reproducibility of tumor repositioning during multiple breathing cycles for liver stereotactic body radiotherapy treatment

Bedos

Riou

Aillères

et al. 2017

Reports of Practical Oncology & Radiotherapy

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“…In this context, ImageJ, a Java-based, multithreaded, freely available, open source, platform independent, and public domain image processing and analysis program which was developed at the National Institutes of Health (NIH), USA [34,35] has been investigated in order to process images in the medical, agricultural and geographical domains [36][37][38][39], but not yet assayed in 2D-GC data to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive two-dimensional gas chromatography for fingerprint pattern recognition in olive oils produced by two different techniques in Portuguese olive varieties Galega Vulgar, Cobrançosa e Carrasquenha

Vaz-Freire

Silva

Freitas

2009

Analytica Chimica Acta

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a b s t r a c tFor olive oil production a metal hammer-decanter olive processing line was compared to a traditional metal hammer-press line, a discontinuous method which, if properly used, yields high-quality virgin olive oils. Galega, Carrasquenha and Cobranç osa olives (traditional Portuguese varieties) were studied. The analysis of the aroma compounds was performed after headspace-solid phase micro extraction. The analytical results obtained after comprehensive gas chromatography in tandem with time of flight mass spectrometry (GC × GC/ToFMS) for these three different olive oil varieties, from a single year harvest and processed with two different extraction technologies, were compared using statistical image treatment, by means of ImageJ software, for fingerprint recognitions and compared with principal component analysis when the area data of each chromatographic spot of the contour plots were considered. The differences used to classify the olive oils studied under different groups after principal component analysis were observed independently of the treatment used (peak areas or the sum of the pixels counts). When the individual peak areas were considered, more then 75.7% of the total variance is explained by the first two principal components while in the case where the data were subjected to image treatment 84.0% of the total variance is explained by the first two principal components. In both cases the first and second principal components present eigenvalues higher then 1.0. Fingerprint image monitoring of the aroma compounds of the olive oil allowed a rapid differentiation of the three varieties studied as well as the extraction methods used. The volatile compounds responsible for their characterization were tentatively identified in a bi-dimensional polar/non-polar column set in the GC × GC/Tof-MS apparatus. This methodology allowed the reduction of the number of compounds needed for matrices characterization, preserving the efficiency of the discrimination, when compared with the traditional methods where the identification of all peaks is needed.

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“…[10][11][12][13][14] In contrast, intrafraction motion refers to the motion of the patient and/or internal organs during delivery of a treatment fraction. A number of authors have investigated internal organ motion in a variety of tumor sites, including lung, 15 liver, [16][17][18] prostate, 19,20 and breast. [21][22][23] These studies indicate that internal anatomy can move significantly in time intervals corresponding to the duration of a radiation fraction.…”

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confidence: 99%

Quality assurance for nonradiographic radiotherapy localization and positioning systems: Report of Task Group 147

Willoughby

Lehmann

Bencomo³

et al. 2012

Medical Physics

107

126

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New technologies continue to be developed to improve the practice of radiation therapy. As several of these technologies have been implemented clinically, the Therapy Committee and the Quality Assurance and Outcomes Improvement Subcommittee of the American Association of Physicists in Medicine commissioned Task Group 147 to review the current nonradiographic technologies used for localization and tracking in radiotherapy. The specific charge of this task group was to make recommendations about the use of nonradiographic methods of localization, specifically; radiofrequency, infrared, laser, and video based patient localization and monitoring systems. The charge of this task group was to review the current use of these technologies and to write quality assurance guidelines for the use of these technologies in the clinical setting. Recommendations include testing of equipment for initial installation as well as ongoing quality assurance. As the equipment included in this task group continues to evolve, both in the type and sophistication of technology and in level of integration with treatment devices, some of the details of how one would conduct such testing will also continue to evolve. This task group, therefore, is focused on providing recommendations on the use of this equipment rather than on the equipment itself, and should be adaptable to each user's situation in helping develop a comprehensive quality assurance program.

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Three-Dimensional Motion of Liver Tumors Using Cine-Magnetic Resonance Imaging

Cited by 96 publications

References 24 publications

Evaluation of reproducibility of tumor repositioning during multiple breathing cycles for liver stereotactic body radiotherapy treatment

Evaluation of reproducibility of tumor repositioning during multiple breathing cycles for liver stereotactic body radiotherapy treatment

Comprehensive two-dimensional gas chromatography for fingerprint pattern recognition in olive oils produced by two different techniques in Portuguese olive varieties Galega Vulgar, Cobrançosa e Carrasquenha

Quality assurance for nonradiographic radiotherapy localization and positioning systems: Report of Task Group 147

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