Preliminary retrospective analysis of daily tomotherapy output constancy checks using statistical process control

Emilio Mezzenga, Vincenzo D'Errico, Anna Sarnelli, Lidia Strigari, Enrico Menghi, Francesco Marcocci, David Bianchini, Marcello Benassi

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to retrospectively evaluate the results from a Helical TomoTherapy Hi-Art treatment system relating to quality controls based on daily static and dynamic output checks using statistical process control methods. Individual value X-charts, exponentially weighted moving average charts, and process capability and acceptability indices were used to monitor the treatment system performance. Daily output values measured from January 2014 to January 2015 were considered. The results obtained showed that, although the process was in control, there was an out-of-control situation in the principal maintenance intervention for the treatment system. In particular, process capability indices showed a decreasing percentage of points in control which was, however, acceptable according to AAPM TG148 guidelines. Our findings underline the importance of restricting the acceptable range of daily output checks and suggest a future line of investigation for a detailed process control of daily output checks for the Helical TomoTherapy Hi-Art treatment system.

Original languageEnglish
Article numbere0147936
JournalPLoS One
Volume11
Issue number2
DOIs
Publication statusPublished - Feb 1 2016

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

Fingerprint Dive into the research topics of 'Preliminary retrospective analysis of daily tomotherapy output constancy checks using statistical process control'. Together they form a unique fingerprint.

  • Cite this

    Mezzenga, E., D'Errico, V., Sarnelli, A., Strigari, L., Menghi, E., Marcocci, F., Bianchini, D., & Benassi, M. (2016). Preliminary retrospective analysis of daily tomotherapy output constancy checks using statistical process control. PLoS One, 11(2), [e0147936]. https://doi.org/10.1371/journal.pone.0147936