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RadiAnt DICOM Viewer - Discussion Forum
RadiAnt DICOM Viewer 0.70 BETA - with MPRs

Dec 5, 2011 07:24 PM
by RadiAnt

MPR function is hidden under CTRL + ALT + 1 (coronal) or + 2 (sagittal) or + 3 (axial).

Known issue is wrong display of cross reference lines when the source plane is oblique.

We'll appreciate your comments :-)

Dec 6, 2011 04:32 PM
by Tommy
I'm speechless!!!
MPR work so fast!!!

I just suggest to have direct "make coronal" and "make sagittal" GUI buttons, rather than shortcuts.

It would be easier and more intuitive.
Dec 6, 2011 06:25 PM
by Sameer
Well done, it's brilliant. Mpr is seamless very happy, would need to get icons up now
Dec 6, 2011 08:20 PM
by RadiAnt
Of course the final version will include MPR buttons. I just didn't want you guys to wait any longer :-) We can brush up a few things and you can at the same time test the MPR engine.

Anyway, I'm happy that you liked what you saw. Thanks for your help!
Dec 7, 2011 08:04 AM
by Tommy
I've noticed that if source images are oblique axials RadiAnt fails to generate MPRs... you hit the hotkey and nothing happens

We do a lot of TOF MR angiography of the head and sometimes the acquisition plain in quite oblique.

If the acquistion plain is more horizontal, MPRs work fine.

If you want I can send you sample DICOM files, with a working and a non-working source TOF sequence
Dec 7, 2011 08:13 AM
by Tommy
probably if the axial oblique angle is 45° or higher the MPR has troubles understanding if the source image is an axial oblique or a coronal oblique.
Dec 7, 2011 08:12 PM
by RadiAnt
We're aware of this problem. Please send me the DICOM sets you've mentioned. Thanks.
Dec 9, 2011 07:58 PM
by Tommy
check your mail
I've just sent you a download link with some sample sequences
Dec 10, 2011 05:59 PM
by Tommy
After few days of testing the new MPR feature I'm getting even more convinced that the software has troubles dealing with oblique non-orthogonal source images.

Apart from the axial-oblique TOF brain images I've sent you before, now I'm sending an entire MRI study of the shoulder (check your mail for the download link) in which MPR feature fails with almost every series...

this makes sense since MRI of the shoulder is composed by oblique-coronal, oblique-sagittal and oblique-axial...

if you double check only the first serie which is a triplane orthogonal localizer can generate MPR.
The other series won't...
Dec 10, 2011 08:12 PM
by RadiAnt
Thanks for taking the time to send the problematic sets. Hopefully we will quickly find a solution.
Dec 10, 2011 08:39 PM
by Tommy
It's a pleasure to help in beta test.

I don't know how exactly your MPR thing works, however I suspect that must be some critic angle of obliquity that confuses the software.

probably some degrees of obliquity are tolerated but beyond some level the software doesn't understand if that source oblique image is an axial-oblique or a coronal-oblique
Dec 11, 2011 07:07 PM
by RadiAnt
I've uploaded a new beta (0.70.2) addressing the issues pointed by Tommy:
Dec 12, 2011 12:24 PM
by Tommy
the new beta is amazing!!!
MPR works with any kind of source images!!!
thumbs up!!!
Dec 12, 2011 02:21 PM
by RadiAnt
Thanks. That's how it was supposed to be :-)
Dec 16, 2011 03:17 PM
by Tommy
apart from MPR which are really a major improvement, will 0.70 have other additional features and/or bugfixes?

do you have a planned final version release date?
Dec 17, 2011 08:57 PM
by RadiAnt
We've been working concurrently on another major feature which probably will be announced in early January. There will be no final release until that feature goes public.

Dec 18, 2011 08:19 AM
by Tommy
wow!!! If that feature is still secret, it must be something really great!!!
Dec 18, 2011 03:49 PM
by RadiAnt
Well, I think it will be less frequently used than MPR...
It's not a big secret - soon we will upload some preview video. Stay tuned! :-)
Dec 19, 2011 12:04 PM
by Tommy
Ok, I'll check this website 24/7 !!! :-)
Dec 19, 2011 02:24 PM
by RadiAnt
Dec 19, 2011 03:00 PM
by Tommy
I don't perform PET-CT studies, however I must say that your software is becoming something incredible...

Dec 19, 2011 04:25 PM
by Tommy
mmmhhhh.... wait a minute... maybe this feature could be interesting for me as well since I perform a lot of body DWI studies

do you think that I could try fusing the DWI images with conventional MR sequences just like you do with PET and CT?
Dec 19, 2011 05:17 PM
by RadiAnt
Let's try - could you send me a sample set with the DWI and conventional MR sequence?
Dec 20, 2011 09:53 AM
by Tommy
ok. I've just sent it. check email.
Dec 29, 2011 05:01 PM
by Ascari
Dear RadiAnt,

first of all many compliments for the essential GUI realized on DICOM field, it can become so dispersive..

Then, as sw developer, I'm surprised by your loading&rendering performance. If it's not a secret, could you tell me the graphic library you use..

Dec 29, 2011 05:42 PM
by RadiAnt
Ascari, thank you! As for your question - it's not a secret, we use plain windows GDI augmented by our own rendering code. The entire DICOM engine is developed from scratch.

Dec 31, 2011 02:53 PM
by DeoVolente
Excellent addition to RadiAnt. MPR starts in a flash, without any delay that's super cool. After we load Sagittal, Coronal and Axial, I think if we have a cursor or cross-hair sort of thing which we can adjust to our ROI(Region of Interest) in one plane so as to simultaneously see in other two planes would be superb. Please think about it.
Jan 1, 2012 02:28 PM
by RadiAnt
DeoVolente, a 3d cursor for easy navigation in reconstructed series would be very helpful indeed. We will certainly implement it in the future. Thanks for a suggestion.
Jan 2, 2012 04:46 PM
by DeoVolente
Well appreciated. Thanks a lot.
Jan 21, 2012 06:58 AM
by Tommy

take a look to this paper:

it shows application of MRI-DWI fusion.
they used OsiriX to fuse images.

i'm glad to know that RadiAnt Viewer will do the same in the near future.
any news about the release of next beta?
Jan 21, 2012 07:37 PM
by RadiAnt
Next week, hopefully :-)

As for the paper - yes, you'll be able to do the same with RadiAnt, however, in conclusions they state that accuracy wasn't improved by fusion.
Jan 22, 2012 08:25 AM
by Tommy
great!!! i'm so excited about next release.

regarding fusion i think that the main advantage is to have DWI images that are more easy to understand for referring clinicians.

I also think that fusion could improve staging miometral invasion in endometrial carcinoma. sometimes in T2 images there may be some doubt about degree of invasion
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