TY - JOUR
T1 - Improving radiation conformality in the treatment of non-small-cell lung cancer
AU - Chang, Joe Y.
AU - Cox, James D.
N1 - Funding Information:
Supported in part by grant NCI RO1-CA74043 and NIH PO1-CA 021239 .
PY - 2010/7
Y1 - 2010/7
N2 - One of the many challenges of lung cancer radiotherapy is conforming the radiation dose to the target because of tumor/organ motion and the need to spare surrounding critical structures. Evolving radiotherapy technologies, such as 4-dimensional image-based motion management, daily on-board imaging, and adaptive radiotherapy, have enabled us to improve the therapeutic index of radiation therapy for lung cancer by permitting the design of personalized treatments that deliver adequate doses conforming to the target while sparing the surrounding critical normal tissues. Four-dimensional computed tomography image-based motion management provides an opportunity to individualize target motion margins and reduce the risk of a geographic target miss. Daily on-board imaging and adaptive radiotherapy reduce setup and motion/anatomy uncertainties over the course of radiotherapy. These achievements in image guidance have permitted the implementation in lung cancer patients of highly conformal treatment delivery techniques that are exquisitely sensitive to organ motion and anatomic change, such as intensity-modulated radiation therapy, stereotactic body radiation therapy, and proton therapy. More clinical studies are needed to further optimize conformal radiotherapy using individualized treatment adaptations based on changes in anatomy and tumor motion during the course of radiotherapy and using functional and biological imaging to selectively escalate doses to radioresistant subregions within the tumor.
AB - One of the many challenges of lung cancer radiotherapy is conforming the radiation dose to the target because of tumor/organ motion and the need to spare surrounding critical structures. Evolving radiotherapy technologies, such as 4-dimensional image-based motion management, daily on-board imaging, and adaptive radiotherapy, have enabled us to improve the therapeutic index of radiation therapy for lung cancer by permitting the design of personalized treatments that deliver adequate doses conforming to the target while sparing the surrounding critical normal tissues. Four-dimensional computed tomography image-based motion management provides an opportunity to individualize target motion margins and reduce the risk of a geographic target miss. Daily on-board imaging and adaptive radiotherapy reduce setup and motion/anatomy uncertainties over the course of radiotherapy. These achievements in image guidance have permitted the implementation in lung cancer patients of highly conformal treatment delivery techniques that are exquisitely sensitive to organ motion and anatomic change, such as intensity-modulated radiation therapy, stereotactic body radiation therapy, and proton therapy. More clinical studies are needed to further optimize conformal radiotherapy using individualized treatment adaptations based on changes in anatomy and tumor motion during the course of radiotherapy and using functional and biological imaging to selectively escalate doses to radioresistant subregions within the tumor.
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U2 - 10.1016/j.semradonc.2010.01.005
DO - 10.1016/j.semradonc.2010.01.005
M3 - Review article
C2 - 20652085
AN - SCOPUS:77954835925
SN - 1053-4296
VL - 20
SP - 171
EP - 177
JO - Seminars in radiation oncology
JF - Seminars in radiation oncology
IS - 3
ER -