// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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health.MRI-SAR-limit Calculator
Calculates MRI Specific Absorption Rate (SAR) from RF pulse parameters and verifies compliance with IEC 60601-2-33 limits (2 W/kg whole body, 10 W/kg local). Exceeding SAR limits causes RF-induced tissue heating — this is a hard safety constraint in MRI sequence design.
Inputs
B1 Ut
Reference formula or conversion factor shown for context.
Rho Tissue Kg M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Sigma S M
Reference formula or conversion factor shown for context.
Pulse Duration Ms
Length of time the process lasts. Ensure units are consistent with rate inputs.
Tr Ms
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
Results
average SAR (W/kg)
The arithmetic mean -- sum divided by count.
peak SAR (W/kg)
Reference formula or conversion factor shown for context.
duty cycle
Reference formula or conversion factor shown for context.
SAR = σE²/(2ρ)
Reference formula or conversion factor shown for context.
IEC 60601-2-33 limits
Reference formula or conversion factor shown for context.
status
Current state of the system, process, or metric — typically pass/fail, healthy/warning/critical, or a descriptive classification.