English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Lung tumor motion due to respiration poses a challenge in the application ofmodern three-dimensional conformal radiotherapy. Direct tracking of the lungtumor during radiation therapy is very difficult without implanted fiducialmarkers. Indirect tracking relies on the correlation of the tumor's motion andthe surrogate's motion. The present paper presents an analysis of thecorrelation between the tumor motion and the diaphragm motion in order toevaluate the potential use of diaphragm as a surrogate for tumor motion. Wehave analyzed the correlation between diaphragm motion and superior-inferiorlung tumor motion in 32 fluoroscopic image sequences from 10 lung cancerpatients. A simple linear model and a more complex linear model that accountsfor phase delays between the two motions have been used. Results show that thediaphragm is a good surrogate for tumor motion prediction for most patients,resulting in an average correlation factor of 0.94 and 0.98 with each modelrespectively. The model that accounts for delays leads to an averagelocalization prediction error of 0.8mm and an error at the 95% confidence levelof 2.1mm. However, for one patient studied, the correlation is much weakercompared to other patients. This indicates that, before using diaphragm forlung tumor prediction, the correlation should be examined on apatient-by-patient basis.

Diaphragm as an anatomic surrogate for lung tumor motion