Calculator
X-ray Room Workload Calculator
Estimate weekly X-ray workload in mA-min from exams, images per exam, and average mAs.
Calculator Inputs
Legend
X-ray Room Workload Calculator guidance
Weekly workload mA-min = exams per week x images per exam x average mAs / 60.
Input meaning
- Exams per week: enter the measured, quoted, or hospital-approved value.
- Images per exam: enter the measured, quoted, or hospital-approved value.
- Average mAs per image: enter the measured, quoted, or hospital-approved value.
Result interpretation
- Use the result as a planning estimate, not as a final approval by itself.
- Record the assumptions used so Procurement, Biomedical, Facilities, Finance, and vendors can review the same basis.
Assumptions
- Shielding design requires modality-specific workload, kVp distribution, occupancy, use factor, and physicist review.
- Do not use this simplified workload alone for radiation room approval.
Biomedical use
- Use this calculator during RFQ preparation, technical evaluation, acceptance planning, service review, or biomedical workload planning.
How to identify the required values
Use these examples and common working ranges to choose values from gauges, labels, manuals, datasheets, RFQs, service reports, CMMS records, or hospital planning assumptions.
| Field | Example value | Common range | Tip |
|---|---|---|---|
| Exams per week | Example: 150. | Use weekly exam volume by room or modality. | Use room-level weekly workload. |
| Images per exam | Example: 2. | General X-ray often uses 1-4 images per exam; special procedures may need more. | Use average images per exam for that room. |
| Average mAs per image | Example: 10. | Use average technique factor from protocols or exposure records. | Use average mAs from protocols or exposure logs. |
Common ranges are starting points for hospital planning. For final procurement, acceptance testing, electrical design, medical gas design, radiation shielding, dialysis water systems, or clinical use, replace the example values with site-specific data and vendor-confirmed figures.
Input Checklist
Confirm these values before relying on the output for procurement, PM, or service planning.
- Exams per week
- Images per exam
- Average mAs
Safety And Engineering Notes
Use calculator outputs as planning estimates and verify critical systems with calibrated measurement or qualified engineering review.
- Shielding design requires modality-specific workload, kVp distribution, occupancy, use factor, and physicist review.
- Do not use this simplified workload alone for radiation room approval.
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