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    Modeling of Non-Small Cell Lung Cancer Volume Changes during CT-Based Image Guided Radiotherapy: Patterns Observed and Clinical Implications

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    Author
    Gay, Hiram A.; Taylor, Quendella Q.; Kiriyama, Fumika; Dieck, Geoffrey T.; Jenkins, Todd; Walker, Paul; Allison, Ron R.; Ubezio, Paolo
    Abstract
    Background. To characterize the lung tumor volume response during conventional and hypofractionated radiotherapy (RT) based on diagnostic quality CT images prior to each treatment fraction. Methods. Out of 26 consecutive patients who had received CT-on-rails IGRT to the lung from 2004 to 2008, 18 were selected because they had lung lesions that could be easily distinguished. The time course of the tumor volume for each patient was individually analyzed using a computer program. Results. The model fits of group L (conventional fractionation) patients were very close to experimental data, with a median Δ% (average percent difference between data and fit) of 5.1% (range 3.5–10.2%). The fits obtained in group S (hypofractionation) patients were generally good, with a median Δ% of 7.2% (range 3.7–23.9%) for the best fitting model. Four types of tumor responses were observed—Type A: “high” kill and “slow” dying rate; Type B: “high” kill and “fast” dying rate; Type C: “low” kill and “slow” dying rate; and Type D: “low” kill and “fast” dying rate. Conclusions. The models used in this study performed well in fitting the available dataset. The models provided useful insights into the possible underlying mechanisms responsible for the RT tumor volume response.
    URI
    http://hdl.handle.net/10342/5725
    Date
    2013
    Citation:
    APA:
    Gay, Hiram A., & Taylor, Quendella Q., & Kiriyama, Fumika, & Dieck, Geoffrey T., & Jenkins, Todd, & Walker, Paul, & Allison, Ron R., & Ubezio, Paolo. (January 2013). Modeling of Non-Small Cell Lung Cancer Volume Changes during CT-Based Image Guided Radiotherapy: Patterns Observed and Clinical Implications. Computational and Mathematical Methods in Medicine, (1-13. Retrieved from http://hdl.handle.net/10342/5725

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    MLA:
    Gay, Hiram A., and Taylor, Quendella Q., and Kiriyama, Fumika, and Dieck, Geoffrey T., and Jenkins, Todd, and Walker, Paul, and Allison, Ron R., and Ubezio, Paolo. "Modeling of Non-Small Cell Lung Cancer Volume Changes during CT-Based Image Guided Radiotherapy: Patterns Observed and Clinical Implications". Computational and Mathematical Methods in Medicine. . (1-13.), January 2013. February 26, 2021. http://hdl.handle.net/10342/5725.
    Chicago:
    Gay, Hiram A. and Taylor, Quendella Q. and Kiriyama, Fumika and Dieck, Geoffrey T. and Jenkins, Todd and Walker, Paul and Allison, Ron R. and Ubezio, Paolo, "Modeling of Non-Small Cell Lung Cancer Volume Changes during CT-Based Image Guided Radiotherapy: Patterns Observed and Clinical Implications," Computational and Mathematical Methods in Medicine 2013, no. (January 2013), http://hdl.handle.net/10342/5725 (accessed February 26, 2021).
    AMA:
    Gay, Hiram A., Taylor, Quendella Q., Kiriyama, Fumika, Dieck, Geoffrey T., Jenkins, Todd, Walker, Paul, Allison, Ron R., Ubezio, Paolo. Modeling of Non-Small Cell Lung Cancer Volume Changes during CT-Based Image Guided Radiotherapy: Patterns Observed and Clinical Implications. Computational and Mathematical Methods in Medicine. January 2013; 2013() 1-13. http://hdl.handle.net/10342/5725. Accessed February 26, 2021.
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