// multi-utility computation suite · offline · instant · precise
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sci.CT-dose-index-CTDI Calculator
Calculates CT dose index CTDI_vol from tube current-time product and pitch, estimating patient radiation dose. Typical CTDI_vol: 10–25 mGy for adult chest CT — head CT doses are 2–3× higher due to smaller volume and skull geometry.
Inputs
Mas
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Kvp
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
Pitch
A multiplier applied in the calculation.
Ctdi100 Mgy Per Mas
Reference formula or conversion factor shown for context.
Results
CTDIvol (mGy)
Reference formula or conversion factor shown for context.
CTDI₁₀₀ (mGy)
Reference formula or conversion factor shown for context.
DLP per cm of scan (mGy·cm)
Sample size or count used in the calculation.
effective dose estimate (mSv/cm)
The value at the specified point or condition.
CTDIvol = CTDI₁₀₀ / pitch
Reference formula or conversion factor shown for context.
dose level
The measured or computed level on the applicable scale.