A phantom-based evaluation of a real-time tracking micro MLC deliv

Yaxi Liu, Fan Chi Su, Martin Szegedi, Lan Lin, Chengyu Shi, Niko Papanikolaou

Research output: Contribution to journalArticlepeer-review


A cutting edge real-time tracking delivery system was evaluated for respiratory-correlated radiation therapy. The performed evaluations included Multi-Leaf Collimator (MLC) leaf position accuracy, MLC motion time delay, dosimetric performance, and tracking failure. The experiment-based results indicated that the dynamic MLC was capable of achieving the position accuracy in 1~2 mm and the MLC time delay in the range of 100 s. The dosimetric comparison evidenced the significant advantage when utilizing real-time tracking. The analysis of experiments also indicated the potential fail of tracking due to the impact of patient breathing patterns and the visibility of tumour.

Original languageEnglish (US)
Pages (from-to)274-297
Number of pages24
JournalInternational Journal of Biomedical Engineering and Technology
Issue number2-3
StatePublished - 2012


  • Dual-layer micro MLC
  • Intra-fractional motion
  • RTRT
  • Radiation therapy
  • Real-time tracking

ASJC Scopus subject areas

  • Biomedical Engineering


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