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The influence of automation on tumor contouring
2017
Cognition, Technology & Work
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This study evaluates the influences of a semi-automation contouring tool, called between-slice interpolation, on the resulting contours and the contouring process. ...
The tumor contouring study was conducted on three patient cases with five physicians in a naturalistic setting. ...
The ethics committee of Delft University of Technology approved the study with physicians. Consents from participants were obtained before the experiment. ...
doi:10.1007/s10111-017-0436-0
fatcat:vw2ipxozljebvibaxcot6bi6fm
Initial Evaluation of a Novel Cone-Beam CT-Based Semi-Automated Online Adaptive Radiotherapy System for Head and Neck Cancer Treatment – A Timing and Automation Quality Study
2020
Cureus
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Conclusion Feasibility of a novel, semi-automated on-line ART system for various head and neck (H&N) cancer sites was demonstrated in terms of treatment duration, dosimetric benefits, and automated contour ...
In this on-line ART system, organs-at-risk (OARs) and target contours and radiotherapy (RT) plans are semi-automatically generated based on the patient CBCT, expediting a typically hours-long RT planning ...
Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: This study was performed on an evaluation system provided by Varian ...
doi:10.7759/cureus.9660
pmid:32923257
pmcid:PMC7482986
fatcat:gwi6lcjd3vgzrdpd7iprmrvkpq
Head and Neck Cancers on CT: Preliminary Study of Treatment Response Assessment Based on Computerized Volume Analysis
2010
American Journal of Roentgenology
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OBJECTIVE-The objective of our study was to investigate the feasibility of computerized segmentation of lesions on head and neck CT scans and evaluate its potential for estimating changes in tumor volume ...
An experienced radiologist (radiologist 1) marked the 35 lesions and outlined each lesion's 2D contour on the best slice on both the pre-and posttreatment scans. ...
Acknowledgments This work was supported in part by a grant from the U.S. Public Health Service (grant CA95153). ...
doi:10.2214/ajr.09.2817
pmid:20308515
pmcid:PMC3729396
fatcat:decoikapgrarno7aa3dwwmefdy
The impact of 2D cine MR imaging parameters on automated tumor and organ localization for MR-guided real-time adaptive radiotherapy
2018
Physics in Medicine and Biology
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This study systematically investigates the impact of geometric imaging parameters on the ability of 2D cine MR imaging to guide template-matching-driven autocontouring of lung tumors and abdominal organs ...
Automated tumor and organ localization using 2D cine MR imaging and template-matching-based autocontouring is robust against variation of geometric imaging parameters. ...
For very small tumors, localization sometimes failed using low-resolution images due to the tumor-to-background-contrast. ...
doi:10.1088/1361-6560/aae74d
pmid:30465542
pmcid:PMC6372137
fatcat:p63r6rjdrjfgfja3joz2gtekhy
Automated quantification of baseline imaging PET metrics on FDG PET/CT images of pediatric Hodgkin lymphoma patients
2020
EJNMMI Physics
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Results Median Dice similarity coefficient of patient contours between automated and physician contours was 0.86 (IQR 0.78–0.91). ...
The purpose of this study was to fully automate the measurement of PET imaging features in PET/CT images of pediatric lymphoma. ...
Authors' contributions AJW designed the retrospective study, performed research, and wrote the manuscript. JK and IL segmented the patient images. ...
doi:10.1186/s40658-020-00346-3
pmid:33315178
fatcat:iuzwajhfavgr5icjy4vahpugvq
Clinical Experience of Automated SBRT Paraspinal and Other Metastatic Tumors Planning with Constrained Hierarchical Optimization
2019
Advances in Radiation Oncology
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We report on the clinical performance of a fully automated approach to treatment planning based on a Pareto optimal, constrained hierarchical optimization algorithm, named Expedited Constrained Hierarchical ...
For each case, after contouring, a template plan using 9 intensity modulated RT fields based on disease site and tumor location was sent to ECHO through an application program interface plug-in from the ...
As shown in Figure 4b , on average, 58.3% of the time was spent on influence matrix calculation, 27.4% on optimization, and 14.3% on the rest of operations (eg, importing the optimal fluence into Eclipse ...
doi:10.1016/j.adro.2019.11.005
pmid:33083666
pmcid:PMC7557131
fatcat:xquosetwjvdipm4ul6qjtx4xye
Reply: Autocontouring Versus Manual Contouring
2011
Journal of Nuclear Medicine
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As expected, manual contouring of PET uptake correlated better with the maximum diameter of the primary tumor than did autocontouring using a fixed threshold at 50% of maximum tumor uptake. ...
Tri-dimensional automatic segmentation of PET volumes based on measured source-to-background ratios: influence of reconstruction algorithms. Radiother Oncol. 2003;69:247-250. 7. ...
There are limited data on contouring the gross tumor volume (GTV) using PET/CT thresholds correlated with tumor size on histopathologic examination. ...
doi:10.2967/jnumed.110.085399
fatcat:qmq4hfrqk5de7pccdbimabau2i
Organ Contouring for Lung Cancer Patients with a Seed Generation Scheme and Random Walks
2020
Sensors
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Several organs were contoured, including the lungs, airway, heart, spinal cord, body, and gross tumor volume (GTV). ...
of time in contouring. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/s20174823
pmid:32858982
pmcid:PMC7506591
fatcat:jui5zk4glna3phpi6my4y7fcte
A Hybrid Approach of Using Particle Swarm Optimization and Volumetric Active Contour without Edge for Segmenting Brain Tumors in MRI Scan
2018
Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
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Segmentation of brain tumors in magnetic resonance imaging is a one of the most complex processes in medical image analysis because it requires a combination of data knowledge with domain knowledge to ...
Such that, the data knowledge refers to homogeneity, continuity, and anatomical texture. While the domain knowledge refers to shapes, location, and size of the tumor to be delineated. ...
Active contour models work under influence of two forces (internal and external forces). These two forces manage pushing and pulling of contour toward the required object's boundaries [1] . ...
doi:10.11591/ijeei.v6i3.592
fatcat:uonqucnrrfg6bd5up4pbj7v6iq
A Review of Snake Models in Medical MR Image Segmentation
2014
Jurnal Teknologi
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We underscore a critical appraisal of the current status of semi-automated and automated methods for the segmentation of MR images with important issues and terminologies. ...
This paper presents an overview of the recent development and challenges of the energy minimizing active contour segmentation model called snake for the MRI. ...
Acknowledgement Mohammed Sabbih Hamoud Al-Tamimi is grateful to the Ministry of Higher Education & Scientific Research, Iraq for providing sponsorship to continue his PhD. ...
doi:10.11113/jt.v69.3116
fatcat:3x7ghtbni5gmflz33nxlbt5hmi
Iterative active deformational methodology for tumor delineation: Evaluation across radiation treatment stage and volume
2008
Journal of Magnetic Resonance Imaging
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Materials and Methods-A comparison by Jaccard similarity (J S ) between this active deformational method and manual segmentation was performed on tumors of various sizes across pre-radiation, three weeks ...
In the large pre-radiated tumors each additional cm 3 of volume was associated with an increase or improvement in J S of 0.0008 (95% CI: 0.0003, 0.0014). ...
This study aimed to demonstrate the feasibility of using the active contour segmentation for the delineation of cervical cancer tumors based on a single target. ...
doi:10.1002/jmri.21500
pmid:18972365
pmcid:PMC2720022
fatcat:mdef2xgyhzhnphubmrvraonld4
SP-0292: Standardisation and treatment planning
2016
Radiotherapy and Oncology
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The standardization of tumor and target volume contouring is therefore highly desirable and can be positively influenced by consensus guidelines, education and clinical audits. ...
Current perspectives on contouring procedure suggest that an automated approach could reduce both the contouring time and inter-observer variations. ...
The standardization of tumor and target volume contouring is therefore highly desirable and can be positively influenced by consensus guidelines, education and clinical audits. ...
doi:10.1016/s0167-8140(16)31541-9
fatcat:55qnsyrwovgkrlj23qiketjflu
Automated delineation of brain structures in patients undergoing radiotherapy for primary brain tumors: From atlas to dose–volume histograms
2014
Radiotherapy and Oncology
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The MRI-ABAS procedure consists of grey matter classification and atlas-based regions of interest definition. ...
Conclusions: The speed, reproducibility, and robustness of the process make MRI-ABAS a valuable tool for investigating radiation dose-volume effects in non-target brain structures providing additional ...
Acknowledgment The authors thank Dr. Maria Pia Graziani for useful suggestions.
Appendix A. ...
doi:10.1016/j.radonc.2014.06.006
pmid:25012642
fatcat:eh7fdrq7tbaxnewd2rb5qbtine
Future directions on the merge of quantitative imaging and artificial intelligence in radiation oncology
2020
Physics and Imaging in Radiation Oncology
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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. ...
Automation of the contouring process has the potential to substantially decrease the workload while possibly increasing contour consistency [10] . ...
On the other side, errors in image acquisition and quantification impact directly on the accuracy of radiotherapy delivery. ...
doi:10.1016/j.phro.2020.06.007
pmid:33458325
pmcid:PMC7807640
fatcat:4xnc6dlinjeqfhx4k7xmwcl5ga
Segmentation of elastographic images using a coarse-to-fine active contour model
2006
Ultrasound in Medicine and Biology
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The approach consists of a coarse-to-fine method for active contour initialization and a gradient vector flow, active contour model for deformable contour optimization with the help of prior knowledge ...
The performance of the algorithm has been shown to be comparable to manual delineation of coagulations on elastograms by medical physicists (r ؍ 0.99 for volumes of 36 radiofrequency-induced coagulations ...
Acknowledgements-This research was supported in part by the Whitaker Foundation (grant RG-02-0457) and the National Institutes of Health (grants R21EB002722, R21CA100989 and R01CA100373). ...
doi:10.1016/j.ultrasmedbio.2005.11.011
pmid:16530098
pmcid:PMC1764611
fatcat:ktf3id4isnahhej3asorfxigp4
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