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EQD Calculator

In practice of radiotherapy, do you often want to check easily the BED and EQD

In practice of radiotherapy, do you often want to check easily the BED and EQD

EQD Calculator

by Hiroyuki KATOH
EQD Calculator
EQD Calculator

What is it about?

In practice of radiotherapy, do you often want to check easily the BED and EQD?

App Details

Medical Education
Last updated
March 26, 2015
Release date
July 19, 2014
More info

App Screenshots

EQD Calculator screenshot-0
EQD Calculator screenshot-1
EQD Calculator screenshot-2
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EQD Calculator screenshot-4

App Store Description

In practice of radiotherapy, do you often want to check easily the BED and EQD?
We considered that it is wonderful to calculate them with iPhone, iPod and iPad that we carry always.
That’s why we designed new App “EQD calculator”.
Considering use in practice, primary concept of design is easy to use and quick to get the results.
In practice, we think that EQD is more useful than directly use of BED, so we named this App as “EQD Calculator”.
Please try EQD calculator!

We have released “TDF Calculator” that is capable to calculate the TDF factor defined by Orton et al.
Please, try also “TDF Calculator”.
See “View More by This Developer” appeared above.

#Strong points
- This App is designed for the professionals working in the field of Radiation Oncology.
- Although there are a lot of numbers on the screen, this App is designed to look like a table calculation, therefore you can understand easily the indication of each values.
- You can refer alpha/beta ratio and tolerance dose tables in this App.
- You can organize this App with URL scheme (jp.37.EQDcalculator://) in other App such as launchers.

#Main features
- This App calculates Biologically Effective Dose (BED) defined by Linear-Quadratic (LQ) model. Additionally, this App can calculate Equivalent Dose (EQD) in indicating fraction dose simultaneously.
- This App can also calculate the fraction dose which is equivalent in indicating fractionation times. Therefore, when you need to change the schedule of radiotherapy, you can keep the influences of change in the treatment to a minimum, estimating with this App.
- This App can calculate these values together in three different conditions stated by three parameters (fraction dose or total dose, number of fractions and alpha/beta ratio), and summation of them automatically.
- Setting either a total dose or a fraction dose, related fraction dose or total dose is calculated respectively, depending on the fractionation times.
- This App (from ver.1.2.0) is just designed for iPhone and iPad with iOS8.

1. J.F. Fowler, Review: Total doses in fractionated radiotherapy—Implications of new radiobiological data. Int J Radiat Oncol Biol Relat Studi Phys Chem Med 1984;46:103–120.
2. B. Emami, J. Lyman, A. Brown, Tolerance of normal tissue to therapeutic irradiation. Int J Radiat Oncol Biol Phys 1991;21:109–122.
3. S.M. Bentzen, M.C. Joiner. The linear-quadratic approach in clinical practice. In M.C. Joiner, A. van der Kogel eds. Basic Clinical Radiobiology. 4 ed. London: Hodder Education; 2009: 120-134.

- Please check carefully End User License Agreement (EULA) before using the App.
- Additionally, you may not use this App unless you agree to terms included below.
- You agree to assume full and sole responsibility for any use of this App.
- We are not responsible for any damages or injury, including but not limited to special or consequential damages, that result from your use of (or inability to use) this App, including any damages or injury caused by any failure of performance, error, omission, interruption, defect, delay in operation, computer virus, or other computer malfunction.

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