CT Radiation Dosage Calculator

CT Dose & Risk Assistant

An intelligent tool for patient-specific radiation dose and risk assessment.

Patient Information

Age at Exposure

Sex Female Male

Patient Diameters (cm)

Standard Measurement Locations

Measure on a single, representative axial CT image:

• Chest CT: At the level of the main carina.
• Abdomen/Pelvis CT: At the level of the liver/kidneys.
• Head CT: At the widest part of the skull.

Scan Parameters

Scan Region Head Neck Chest Abdomen-Pelvis Trunk (Chest, Abdomen, Pelvis)

CTDIvol (mGy)

DLP (mGy·cm)

Calculated Effective Diameter:

Patient Absorbed Dose (SSDE)

-

A size-corrected estimate of the dose absorbed by the patient (mGy).

Effective Dose (E)

-

A standardized measure of radiation risk for context (mSv).

Lifetime Attributable Risk (LAR)

-

Personalized cancer risk estimate from this scan (%).

Patient-Friendly Summary

This report helps you understand the radiation from your recent CT scan. It's important to remember that your doctor has determined that the benefit of this scan for your health is greater than the very small risks associated with it.

Understanding the Dose:

• The radiation dose from this scan is estimated to be equivalent to the natural background radiation an average person receives over approximately - years.
• This is comparable to the radiation from about - standard chest X-rays.

Understanding the Risk:

Based on scientific models, the estimated additional chance of developing cancer over a lifetime from this single scan is about -. This is a very small increase to the average person's lifetime cancer risk.

Disclaimer: This is an estimate based on standard models and should be used for informational purposes only. It is a tool to support, not replace, conversations with your healthcare provider.