TY - GEN
T1 - Respiratory motion prediction for tumor following radiotherapy by using time-variant seasonal autoregressive techniques
AU - Ichiji, Kei
AU - Homma, Noriyasu
AU - Sakai, Masao
AU - Takai, Yoshihiro
AU - Narita, Yuichiro
AU - Abe, Mokoto
AU - Sugita, Norihiro
AU - Yoshizawa, Makoto
PY - 2012/12/14
Y1 - 2012/12/14
N2 - We develop a new prediction method of respiratory motion for accurate dynamic radiotherapy, called tumor following radiotherapy. The method is based on a time-variant seasonal autoregressive (TVSAR) model and extended to further capture time-variant and complex nature of various respiratory patterns. The extended TVSAR can represent not only the conventional quasi-periodical nature, but also the residual components, which cannot be expressed by the quasi-periodical model. Then, the residuals are adaptively predicted by using another autoregressive model. The proposed method was tested on 105 clinical data sets of tumor motion. The average errors were 1.28 ± 0.87 mm and 1.75 ± 1.13 mm for 0.5 s and 1.0 s ahead prediction, respectively. The results demonstrate that the proposed method can outperform the state-of-the-art prediction methods.
AB - We develop a new prediction method of respiratory motion for accurate dynamic radiotherapy, called tumor following radiotherapy. The method is based on a time-variant seasonal autoregressive (TVSAR) model and extended to further capture time-variant and complex nature of various respiratory patterns. The extended TVSAR can represent not only the conventional quasi-periodical nature, but also the residual components, which cannot be expressed by the quasi-periodical model. Then, the residuals are adaptively predicted by using another autoregressive model. The proposed method was tested on 105 clinical data sets of tumor motion. The average errors were 1.28 ± 0.87 mm and 1.75 ± 1.13 mm for 0.5 s and 1.0 s ahead prediction, respectively. The results demonstrate that the proposed method can outperform the state-of-the-art prediction methods.
UR - http://www.scopus.com/inward/record.url?scp=84870795818&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84870795818&partnerID=8YFLogxK
U2 - 10.1109/EMBC.2012.6347368
DO - 10.1109/EMBC.2012.6347368
M3 - Conference contribution
C2 - 23367303
SN - 9781424441198
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 6028
EP - 6031
BT - 2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2012
T2 - 34th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS 2012
Y2 - 28 August 2012 through 1 September 2012
ER -