## Calculate DVH and DVH parameters (D99%, V40Gy, D0.5cc, ...)

Version 1.0.2 (2.71 KB) by
A function to calculate the cumulative dose-volume histogram (DVH) and DVH parameters from a dose map and binary structure mask.

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Updated 24 Apr 2023

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I couldn't find a good all-in-one function to calculate DVH parameters from dose maps + structure masks (GTV, OAR, ...), so I made one myself. Any feedback is very welcome.
The primary purpose of this function is to calculate DVH parameters, like D99%, V40Gy, D0.5cc and the like. In my experience, the actual DVH itself is desired less often, but since it needs to be calculated anyway before parameters can be extracted, the function can also return that for free.
This function is supposed to be very "Matlab-native", meaning it needs and returns typical Matlab objects such as logical arrays and tables. Therefore, it is expected you have already imported the dose files (which typically begin as RTdose dicoms) as arrays, converted structure contours (RTstruct dicoms) to binary arrays, and so forth.
A limitation of this function is that it cannot calculate multiple DVHs for multiple structures at the same time. However, it is fast enough that it should be no problem calling it multiple times for every structure. As long as the underlying dose map remains the same, you can plot the resulting DVHs on top of each other; the dose bins (DVH x-axis) is calculated using the dose map maximum.
Use
Name-value pair arguments are used to obtain the DVH parameters, e.g.
'Dperc', 99 -> returns the minimal dose to 99% of the volume
'Dvol', 0.5 -> returns the minimal dose to 0.5 cc
'Vperc', 45 -> returns the volume percentage receiving at least 45 Gy
'Vvol', 30 -> returns the volume in cc receiving at least 30 Gy
The rest of the syntax and input arguments are fairly straightforward, please see the code. Most important things to remember:
• Structure mask must be a logical and same size as the dose map
• Voxel sizes are required and are in cm
Examples:
>> [params, dvh_values] = dvh(dose_map, gtv_mask, [0.3; 0.3; 0.3], 'Dperc', 99, 'Vvol', 45);
>> params
params =
1×2 table
D99% (Gy) V45.0cc (cc)
_________ ____________
40.711 29.889
>> plot(dvh_values(:, 1), dvh_values(:, 2)) % To plot the DVH
>> params = dvh(dose_map, gtv_mask, [0.3; 0.3; 0.3], 'Vperc', 45)
params =
table
V45Gy (%)
________
45.782
>> [~, dvh_values] = dvh(dose_map, gtv_mask, [0.3; 0.3; 0.3], 'Normalize', false); % get an absolute DVH with cc values

### Cite As

Guus Grimbergen (2023). Calculate DVH and DVH parameters (D99%, V40Gy, D0.5cc, ...) (https://www.mathworks.com/matlabcentral/fileexchange/127788-calculate-dvh-and-dvh-parameters-d99-v40gy-d0-5cc), MATLAB Central File Exchange. Retrieved .

##### MATLAB Release Compatibility
Created with R2023a
Compatible with any release
##### Platform Compatibility
Windows macOS Linux

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Version Published Release Notes
1.0.2

Updated description.

1.0.1

Fixed comment typos

1.0.0