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Customizing Treatment Scheduling Windows with a Time Margin Recipe: A Single-institutional Study.

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Optimizing radiotherapy scheduling is crucial. A new method using van Herk's safety margin formula established a longer treatment scheduling window (TSW), improving workload management and reducing patient wait times.

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Area of Science:

  • Radiotherapy
  • Medical Physics
  • Healthcare Management

Background:

  • Increasing cancer incidence and complex treatments necessitate intelligent radiotherapy scheduling.
  • Current scheduling practices may not adequately accommodate treatment complexities.

Purpose of the Study:

  • To determine an optimized radiotherapy treatment scheduling window (TSW) using van Herk's safety margin formula.
  • To investigate the impact of in-room imaging on linac occupancy time (LOT).

Main Methods:

  • Utilized van Herk's safety margin formula to calculate TSW.
  • Analyzed retrospective data on LOT, treatment site, intent, techniques, and in-room imaging using Varian Aria™ software.
  • Examined the influence of in-room imaging on linac occupancy time.

Main Results:

  • The calculated mean TSW (31.5 min) was significantly longer than the current 15 min TSW (P=0.036).
  • Pelvic (43.8 min) and brain (12 min) sites showed the longest and shortest TSWs, respectively.
  • Factors like palliative intent, IMRT, special protocols, and multiple in-room images increased LOT, with high time uncertainty observed in pelvic and thorax sites.

Conclusions:

  • The time margin recipe can customize TSW and enhance radiotherapy practices.
  • This approach aids in managing departmental workload and reducing patient wait times.