What do the BED and EQD2 values represent in radiation therapy?

BED quantifies the biological effectiveness of a radiation dose using the linear-quadratic model, while EQD2 converts any fractionation scheme into an equivalent total dose delivered in 2 Gy fractions for easier comparison across treatment plans.

Can this tool compare multiple fractionation schemes at once?

Yes, the interface includes separate PTV fields for up to three different fractionation schemes, allowing side-by-side calculation of total dose, EQD2, and BED for direct comparison.

Is the alpha-beta ratio preset or do I need to look it up?

The alpha-beta ratio is a user-defined parameter; you enter the value relevant to the specific tissue or tumor type being evaluated, and the calculator applies it to the BED and EQD2 formulas.

Are the calculation results legally binding for insurance reimbursement?

No, the site explicitly states that the calculations are for orientation only and do not constitute a therapeutic recommendation or guarantee of reimbursement under the EBM tariff system.

Medical & ClinicalTool Review

BED Calculator

Provided byEQD2 Rechnereqd2rechner.de

The site includes an EQD2 and BED calculator with explicit formulas and variable definitions. Users can enter fractio...

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Screenshot of BED Calculator on EQD2 Rechner — eqd2rechner.deOpen the live tool →

About this tool

What BED Calculator does

The EQD2 Rechner is a free online tool for comparing fractionated radiation therapy plans using biologically effective dose (BED) and equivalent dose in 2 Gy fractions (EQD2). Users enter the dose per fraction, the number of fractions, and the alpha-beta ratio to calculate total dose, EQD2, and BED values. The site presents explicit formulas and variable definitions, making the radiobiological calculations transparent for clinicians and researchers evaluating treatment plans.

Step by step

How to use the EQD2 Rechner BED Calculator

1
Enter the dose delivered per fraction in Gy/f
2
Input the total number of fractions planned
3
Specify the alpha-beta ratio for the tissue type
4
View the computed total dose, EQD2, and BED outputs
5
Compare results across different fractionation schemes using the side-by-side PTV fields

Is it right for you

Best for

Radiation oncologists and medical physicists who need to quickly calculate and compare BED and EQD2 values for standard or experimental fractionation schedules without installing software.

Limitations

Results are for orientation only and not a therapeutic recommendation
No unit switching beyond grays and fractions
Clinical decisions should not rely solely on this calculator's output

Questions

BED Calculator FAQ

What do the BED and EQD2 values represent in radiation therapy?: BED quantifies the biological effectiveness of a radiation dose using the linear-quadratic model, while EQD2 converts any fractionation scheme into an equivalent total dose delivered in 2 Gy fractions for easier comparison across treatment plans.
Can this tool compare multiple fractionation schemes at once?: Yes, the interface includes separate PTV fields for up to three different fractionation schemes, allowing side-by-side calculation of total dose, EQD2, and BED for direct comparison.
Is the alpha-beta ratio preset or do I need to look it up?: The alpha-beta ratio is a user-defined parameter; you enter the value relevant to the specific tissue or tumor type being evaluated, and the calculator applies it to the BED and EQD2 formulas.
Are the calculation results legally binding for insurance reimbursement?: No, the site explicitly states that the calculations are for orientation only and do not constitute a therapeutic recommendation or guarantee of reimbursement under the EBM tariff system.

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