About this Modality Worklist Volume Calculator
DICOM modality worklist traffic depends on scheduled studies, number of modalities, and how often devices refresh their lists.
Who this calculator is for
- PACS/RIS administrators.
- Modality integration teams.
- Radiology IT teams sizing worklist services.
When to use it
- Estimate daily worklist queries.
- Plan peak MWL traffic.
- Compare refresh interval assumptions.
How to use this calculator
- Enter scheduled studies and modality count.
- Enter queries per modality per hour and operating hours.
- Set peak concentration.
- Review daily and peak query volume.
Key assumptions
- Query behavior is averaged across modalities.
- Add-on overhead applies to scheduled studies only.
- No patient or order data is used.
Accuracy and testing
Review formula sources, default test cases, assumptions, unit handling, rounding rules, and changelog for this calculator.
How this calculator works
Daily queries = modalities x queries per modality per hour x operating hours. Daily orders are scheduled studies plus add-on overhead.
Daily worklist queries = modality count * queries per modality per hour * operating hours. Daily order volume = scheduled studies * add-on overhead factor.
Inputs explained
Queries per modality per hour
How often each modality refreshes or queries worklist.
Add-on overhead
Extra orders from same-day add-ons, corrections, and reschedules.
Peak hour share
Share of daily queries expected in the busiest hour.
Understanding your results
Use query volume for worklist-service sizing and order volume for operational monitoring. Real traffic depends on modality configuration.
Example scenarios
Worklist service
25 modalities querying 6 times/hour over 12 hours creates 1,800 daily worklist queries.
Key Features
- Instant Calculation
- Private & Secure
- Mobile Optimized
Tips & Best Practices
- Measure actual DICOM C-FIND counts if available.
- Separate high-frequency modalities from low-frequency devices.
- Watch for misconfigured modalities polling too frequently.