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RadiAnt DICOM Viewer - Discussion Forum
It's finally here - GPU accelerated Volume Rendering!

Dec 19, 2017 05:26 PM
by RadiAnt
Our latest beta versions (4.5.1) adds the GPU acceleration for 3D VR mode.

Volume rendering is started in the GPU mode by default (if a supported graphic card is detected).
Press F9 to switch between GPU and CPU modes.

This feature is available on modern Nvidia graphic cards:

GeForce GTX 770, GeForce GTX 760, GeForce GT 740, GeForce GTX 690, GeForce GTX 680, GeForce GTX 670, GeForce GTX 660 Ti, GeForce GTX 660, GeForce GTX 650 Ti BOOST, GeForce GTX 650 Ti, GeForce GTX 650, GeForce GTX 880M, GeForce GTX 780M, GeForce GTX 770M, GeForce GTX 765M, GeForce GTX 760M, GeForce GTX 680MX, GeForce GTX 680M, GeForce GTX 675MX, GeForce GTX 670MX, GeForce GTX 660M, GeForce GT 750M, GeForce GT 650M, GeForce GT 745M, GeForce GT 645M, GeForce GT 740M, GeForce GT 730M, GeForce GT 640M, GeForce GT 640M LE, GeForce GT 735M, GeForce GT 730M, GeForce GTX Titan Z, GeForce GTX Titan Black, GeForce GTX Titan, GeForce GTX 780 Ti, GeForce GTX 780, GeForce GT 640 (GDDR5), GeForce GT 630 v2, GeForce GT 730, GeForce GT 720, GeForce GT 710, GeForce GT 740M (64-bit, DDR3), GeForce GT 920M, GeForce GTX 750 Ti, GeForce GTX 750, GeForce GTX 960M, GeForce GTX 950M, GeForce 940M, GeForce 930M, GeForce GTX 860M, GeForce GTX 850M, GeForce 845M, GeForce 840M, GeForce 830M, GeForce GTX Titan X, GeForce GTX 980 Ti, GeForce GTX 980, GeForce GTX 970, GeForce GTX 960, GeForce GTX 950, GeForce GTX 750 SE, GeForce GTX 980M, GeForce GTX 970M, GeForce GTX 965M, Nvidia TITAN Xp, Titan X, GeForce GTX 1080 Ti, GTX 1080, GTX 1070 Ti, GTX 1070, GTX 1060, GTX 1050 Ti, GTX 1050, GT 1030, MX150, NVIDIA TITAN V, Quadro K5000, Quadro K4200, Quadro K4000, Quadro K2200, Quadro K2000, Quadro K2000D, Quadro K600, Quadro K420, Quadro K500M, Quadro K510M, Quadro K610M, Quadro K1000M, Quadro K2000M, Quadro K1100M, Quadro K2100M, Quadro K3000M, Quadro K3100M, Quadro K4000M, Quadro K5000M, Quadro K4100M, Quadro K5100M, NVS 510, Quadro K6000, Quadro K5200, Quadro K1200, Quadro K620, Quadro M2000M, Quadro M1000M, Quadro M600M, Quadro K620M, NVS 810, Quadro M6000 24GB, Quadro M6000, Quadro M5000, Quadro M4000, Quadro M2000, Quadro M5500, Quadro M5000M, Quadro M4000M, Quadro M3000M, Quadro P6000, Quadro P5000, Quadro P4000, Quadro P2000, Quadro P1000, Quadro P600, Quadro P400, Quadro P5000(Mobile), Quadro P4000(Mobile), Quadro P3000(Mobile)
Dec 21, 2017 01:49 AM
by Luiz
can`t use GPU rendering in my notebook, only CPU, NVIDIA GTX970M, F9 does not switch
Dec 21, 2017 12:17 PM
by Carlo
Please, add this feature for AMD Vega64 gpu?
Dec 22, 2017 05:51 PM
by RadiAnt

Make sure that you have the latest GeForce drivers installed:


We will explore the possibility of supporting AMD GPUs in the future.
Dec 23, 2017 04:01 PM
by Marcel
Any chance to see improvements in Intel HD graphics?
Jan 1, 2018 01:45 PM
by tomb745
So many of us work with ultrabooks with build-in graphic accelelators - please do consider it in your plans.
Jan 7, 2018 03:02 PM
by Tommy
I have a Win7 x64 computer with an NVIDIA QUADRO FX 3700 card.

I don't see it on the list... does this mean that it's not supported?
Jan 9, 2018 04:31 PM
by RadiAnt
@Marcel & @tomb745

Current Intel HD graphics are not very well suited for Volume Rendering. They substantially lack power required for computational efforts in VR. Creating VR images is very different from rendering game scenes.


Quadro FX 3700 supports the 1.1 version of Compute Capability.
RadiAnt requires at least CC version 3.0 (the most recent is 7.0).
You basically need the Nvidia graphics card released within last 5 years. Yours is 10 years old.
Jan 9, 2018 06:13 PM
by Tommy
Ok, I understand.
Jan 25, 2018 11:52 AM
by Kiril
1050Ti with latest drivers (390.65). Radiant does not switch to gpu rendering. Drivers and programm also reinstalled.
Jan 27, 2018 09:32 PM
by Stefan
- I want to see the DICOM Header and search in it

Feb 3, 2018 03:56 PM
by RadiAnt
Kiril, please try our latest beta (4.5.5). It seems that there was a library missing in the 4.5.3 setup file.

Stefan, just press CTRL+ALT+T when viewing a DICOM file.
Feb 11, 2018 05:24 PM
by Michael Tran
Dear Radiant

Just need your advice for select Graphic card : GeForce GTX or quadro is better one for VR.
Some guy told me that GTX for gaming, not rendering .
is that true ?

Thank you

Feb 20, 2018 05:31 PM
by RadiAnt
You'll be better off with a fast GTX card (1080ti or Titan). GPU acceleration was designed with the consumer cards in mind.
Apr 30, 2018 04:38 PM
by crow
To all having issues switching to GPU mode on laptops, you need to add radiant to your nvidia control panel program options and set to always use nvidia for this program.

@Radiant team

I don't know if I've missed it, but is there an option to save the 3d reconstruction to a mesh or cad?

May 5, 2018 05:20 PM
by RadiAnt

No, currently there is no such option (3D export) in RadiAnt.
Thank you for your tip about GPU on laptops.
May 20, 2018 11:06 AM
by vaderbsb
Tried latest version of Radiant using a GeForce GT 730 card. The 3D or MPR simply would not use the GPU. In fact, when I click the settings button I see two options: CPU and the GT 730 but the CPU seems to be always selected.
Checked out card drivers and everything seems to be OK.
Any idea on how to force Radiant to use the GPU?

Jun 3, 2018 05:35 PM
by RadiAnt

It could be insufficient memory - if the volume data cannot be loaded into GPU RAM, the GPU mode cannot be enabled. We will probably add some error notifications for GPU mode.
Jul 31, 2018 08:00 AM
by crow

After some update my tip doesn't even work for me anymore. I have dual cards an intel and other nvidia on my laptop. I had to go to BIOS and disable intels integrated. After that i was able to use nvidia for 3d rendering.
Aug 1, 2018 08:12 PM
by JJ
JJ here again, going to be a rant session. sorry.


Please take note of how many people here have questions related to laptop related hardware. Many of the people/radiologist using your product are doing so on laptops. they're taking their laptops to conferences and lectures...

With that in mind again I stress the importance of a local library. The people using your product are not using this for advanced post-processing. while generating cool 3d recons is neat and people like doing it quickly on their laptop. I'd recommend that the local library really take a preceding priority so you can gain wider market appeal.

Still a great product.
Aug 2, 2018 07:17 AM
by RadiAnt

No worries, it's going to happen ;-)
Forum post picture
Aug 7, 2018 03:29 PM
by JJ
Incredible news guys! I'll be eagerly awaiting this feature. I'd expect to become the defacto dicom viewer for the non-Mac OS platform. Get your servers ready!
Aug 8, 2018 07:24 PM
by vaderbsb
Indeed the local database will be a fantastic plus for this software. Just one note for the developers: please make sure that the user can choose the folder and specially the drive where the database is located. This critical for notebook users with a small boot SSD and a larger spinning HD. If only the C: drive is available for the database then we will be extremely limited!!

Aug 21, 2018 08:23 PM
by RadiAnt
Surely, the database folder will be configurable.
May 17, 2019 12:04 AM
by Rafael
I bought a new pc to work with radiant -ryzen 2600x, 16gb ddr4, radeon rx 570 4gb, but only afterwards I discovered that the 3d GPU render mode only works with nvidia cards... It is really a shame.
Any plans to make it work with AMD GPUs?
May 22, 2019 06:46 PM
by RadiAnt
Sorry, no imminent plans for AMD GPUs... GPU acceleration is based on CUDA, which is available only for NVIDIA cards.
Jul 18, 2019 02:45 PM
I wanted to report, I have GTX 1060 with latest drivers in latest radiant version and only shows CPU acceleration.
Jul 19, 2019 01:31 PM
sorry my bad, wasnt on the latest drivers. It works great.
Jul 21, 2019 06:41 PM
by RadiAnt
Glad to hear that, G-DAWG :-)
Apr 30, 2020 04:07 AM
by Erico
Any plans to work with AMD GPUs?
May 7, 2020 10:41 AM
by RadiAnt
Sorry to disappoint you but not in the nearest future...
Oct 2, 2020 02:46 PM
by DD
GPU function does not work on my computer with quadro k600 with latest drivers , in normal mpr it is possible which doesn’t seem to show any significant improvement from cpu but in vrt mode.... it just doesn’t run and switches to cpu all the time
Oct 3, 2020 12:00 PM
by boskar
@DD - your GPU is simply slower in this scenario then your CPU.
Oct 19, 2020 07:47 AM
by RadiAnt
Quadro K600 has only 1GB of RAM. This might be not enough to load 3D volumes.
Oct 18, 2021 11:47 PM
by Alex
Any chance of supporting the new Intel Iris Xe graphcis ? Most notebooks don´t have Nvidia cards in them.
Oct 24, 2021 08:17 AM
by RadiAnt
There are certainly chances but not in the coming months, I'm afraid.
Nov 24, 2021 05:29 PM
by Lukash
Hello again, thank you for your work!
I am not IT-man, so maybe my question will be dumb

As I understand, RadiAnt uses CUDA cores from NVIDIA cards to render.
But there is another method - OpenCL
And AMD makes an utility to convert CUDA code to OpenCl

What do you think about it?
Nov 25, 2021 05:02 AM
by Free Guy, not so, any more
how to download the beta version?
can some one post the link ??
Nov 25, 2021 10:27 AM
by RadiAnt

ROCm is only supported on Linux...

@Free Guy, not so, any more

Beta versions are only available ...when they're available ;-)
We'll probably see one in early 2022.
Jun 8, 2022 03:42 PM
by Riccardino
hey, first of all thank you for all the amazing work!

I'm planning my new pc build and i was almost going for an AMD GPU till i asked myself..."what about RADIANT?"

So I'm writing you to be sure that the only graphics card supporting GPU acceleration for 3D VR mode are still the NVIDIA one (since last post is more than 6 month old)
If so i have no choiche but buying one of those ;)

Jun 25, 2022 09:38 AM
by RadiAnt
Thanks for your kind words! Yes, still only NVIDIA cards are supported for GPU acceleration.
Aug 31, 2022 07:28 PM
by Ben- Veterinary Radiologist
Hello! Are there any plans to enable GPU accelerated volume rendering for AMD graphics cards? If not, can you provide an explanation why? Unfortunately, I don't have the ability to choose the graphics card in my workstations (corporate), and for some reason they choose AMD.


Sep 20, 2022 10:39 AM
by wwj
Does NVIDIA RTX A2000 6GB support GPU acceleration in 3D
Sep 28, 2022 02:56 PM
by RadiAnt
@Ben- Veterinary Radiologist

NVIDIA provides CUDA SDK which makes easy for us to develop efficient 3D VR/MIP engine.
There is no similar solution from AMD.


RTX A2000 should work just fine with RadiAnt.
Nov 28, 2023 08:08 PM
by nbbt
Need AMD GPU Acceleration...
Dec 2, 2023 05:29 PM
by boskar
Currently, as a Linux user I do think that CUDA might be a dead end.
6 years ago I was really enthusiastic about Radiant+CUDA.
I even managed to run it under wine-staging.
Nvidia still dominates the market, but OpenCL/maybe other technologies are getting more and more important, and vendor neutral.
I don't know how much complexity it would add to the code, maybe there will be some performance tradeoff, but I feel it may be reasonable to rewrite cuda to opencl.
Although: other features are certainly more important - CMPR and creating DICOM reconstructions/SCs.
Dec 13, 2023 08:57 AM
by yyr
Has anyone tried using an eGPU? If it works, does it run well?
Just exploring rig options.
Dec 23, 2023 08:08 PM
by RadiAnt
We chose CUDA because of its performance and developer friendliness. There might come a moment to start catering to other GPU vendors; however, there are still some prioritized features in the to-do list.
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