Evaluation of mechanical accuracy for couch-based tracking system (CBTS)

Suk Lee, Kyung Hwan Chang, Jand Bo Shim, Yuanjie Cao, Chang Ki Lee, Sam Ju Cho, Dae Sik Yang, Young Je Park, Won Seob Yoon, Chul Yong Kim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


This study evaluated the mechanical accuracy of an in-house-developed couch-based tracking system (CBTS) according to respiration data. The overall delay time of the CBTS was calculated, and the accuracy, reproducibility, and loading effect of the CBTS were evaluated according to the sinusoidal waveform and various respiratory motion data of real patients with and without a volunteer weighing 75kg. The root mean square (rms) error of the accuracy, the reproducibility, and the sagging measurements were calculated for the three axes (X, Y, and Z directions) of the CBTS. The overall delay time of the CBTS was 0.251 sec. The accuracy and reproducibility in the Z direction in real patient data were poor, as indicated by high rms errors. The results of the loading effect were within 1.0 mm in all directions. This novel CBTS has the potential for clinical application for tumor tracking in radiation therapy.

Original languageEnglish
Pages (from-to)157-169
Number of pages13
JournalJournal of Applied Clinical Medical Physics
Issue number6
Publication statusPublished - 2012


  • Consistency
  • Couch
  • Delay time
  • Image-guided radiation therapy (IGRT)
  • Tracking

ASJC Scopus subject areas

  • Radiation
  • Instrumentation
  • Radiology Nuclear Medicine and imaging


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