What do BED and EQD2 values mean in radiation therapy?

BED (Biologically Effective Dose) and EQD2 (Equivalent Dose in 2-Gy fractions) are radiobiological metrics that adjust the physical dose to account for fraction size and overall treatment duration, allowing comparison between different radiation schedules using the linear-quadratic model.

How do I choose the right alpha-beta ratio for my calculation?

The alpha-beta ratio is specific to the tissue or tumor type being treated; typical values range from 2-10 Gy for many tumors, around 3 Gy for late-responding normal tissues, and 2-3 Gy for early-responding tissues, but clinical guidelines should be consulted for the specific application.

Can this tool compare multiple treatment plans at once?

The calculator processes one set of inputs at a time; users can manually run separate calculations for different fractionation schemes to compare their biological dose equivalents side by side.

Is the BED Calculator on Solutio in silico free to use?

Yes, the Biological Dose Calculator is a free online tool accessible directly on the page with no mandatory paid account or registration required.

Medical & ClinicalTool Review

BED Calculator

Provided bySolutio in silicosolutioinsilico.com

Its Biological Dose Calculator is a free online tool for BED and EQD2-style radiobiological dose comparisons. Users i...

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About this tool

What BED Calculator does

The BED Calculator on Solutio in silico is a free online tool for radiobiological dose comparisons using the Biologically Effective Dose (BED) and Equivalent Dose in 2-Gy fractions (EQD2) methods. Users enter the dose delivered per fraction, the total number of fractions planned, and the alpha-beta ratio to evaluate and compare different radiation therapy treatment schemes. The calculator provides immediate results on the page without requiring a paid account or registration. What distinguishes this particular site's version is its direct, no-frills accessibility. Unlike some competitors that may require account creation or limit functionality behind paywalls, this tool is openly available on the page with no mandatory paid account. The interface focuses on the core radiobiological inputs—dose per fraction, number of fractions, and alpha-beta ratio—presenting results clearly for treatment plan evaluation. While other tools like Omni Calculator or EQD2 Rechner also offer BED and EQD2 calculations, Solutio in silico's version is notable for its straightforward, registration-free access within a dedicated radiobiology context.

Step by step

How to use the Solutio in silico BED Calculator

1
Enter the dose delivered per fraction in the designated field
2
Input the total number of fractions planned for the treatment course
3
Specify the alpha-beta ratio relevant to the tissue or organ being treated
4
View the calculated BED and EQD2 results displayed on the page
5
Compare the output with planned treatment schemes to assess biological effectiveness

Is it right for you

Best for

Radiation oncologists, medical physicists, and radiobiology researchers who need to quickly compare treatment plans or evaluate biological dose equivalents using custom alpha-beta ratios without account barriers.

Limitations

Results depend on the linear-quadratic model assumptions and may not apply to all tissue types equally
Requires user to know the appropriate alpha-beta ratio for the specific clinical scenario
No unit switching or conversion features beyond the standard BED/EQD2 outputs

Questions

BED Calculator FAQ

What do BED and EQD2 values mean in radiation therapy?: BED (Biologically Effective Dose) and EQD2 (Equivalent Dose in 2-Gy fractions) are radiobiological metrics that adjust the physical dose to account for fraction size and overall treatment duration, allowing comparison between different radiation schedules using the linear-quadratic model.
How do I choose the right alpha-beta ratio for my calculation?: The alpha-beta ratio is specific to the tissue or tumor type being treated; typical values range from 2-10 Gy for many tumors, around 3 Gy for late-responding normal tissues, and 2-3 Gy for early-responding tissues, but clinical guidelines should be consulted for the specific application.
Can this tool compare multiple treatment plans at once?: The calculator processes one set of inputs at a time; users can manually run separate calculations for different fractionation schemes to compare their biological dose equivalents side by side.
Is the BED Calculator on Solutio in silico free to use?: Yes, the Biological Dose Calculator is a free online tool accessible directly on the page with no mandatory paid account or registration required.

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