[Rtk-users] Fwd: rtkfourdfdk

[Guillaume Landry]

Hi Simon,

We are using the 1.1.0 release version. Thanks for the explanation.

Regards
Guillaume

Dr. Guillaume Landry
Ludwig Maximilians University (LMU) Munich 
Medical Physics
Am Coulombwall 1
85748 Garching
Tel:+49 (0) 89 289-14077
Fax:+49 (0) 89 289-14072

On 12/07/2015 09:54 AM, Simon Rit wrote:
> Hi Guillaume,
> I think this issue has been fixed with this commit:
> https://github.com/SimonRit/RTK/commit/c20b469cb0ccca0a93a16835aba38f9dae64ff0b
> Are you using a version that is older? If yes, maybe try to update RTK.
> Thanks for the report,
> Simon
>
> On 07/12/2015 09:43, Guillaume Landry wrote:
>> Good morning Simon,
>>
>> I sent this mail to the rtk list but its currently held due to the
>> size of the screenshots. Anyway I was wondering what you thought was
>> the issue. If you prefer to wait for the mailing list no worries.
>>
>> Thanks
>> Guillaume
>>
>>
>> -------- Forwarded Message --------
>> Subject: 	rtkfourdfdk
>> Date: 	Sun, 6 Dec 2015 15:53:58 +0100
>> From: 	Guillaume Landry <g.landry at physik.uni-muenchen.de>
>> Reply-To: 	Christopher Kurz <christopher.kurz at physik.uni-muenchen.de>
>> To: 	rtk-users at public.kitware.com
>>
>>
>>
>> Dear users, developers,
>>
>> I am exploring the 4D functionality of rtk and was experimenting with
>> rtkfourdfdk as starting point, using a 1 minute scan of the CIRS moving
>> phantom. I used the attached phase signal along with the settings I
>> normally use with rtkfdk (so far those worked fine in 3D, see below for
>> the command used).
>>
>> I tried the default 10 phase bin reconstruction and I obtain a
>> corresponding image. The issue I observe is that when I open the data in
>> my viewer (vv in this case) for each phase bin the reconstructed images
>> have difference "initial angle", in other words rotated with respect to
>> each other (see snapshots). The rotation increases with bin# up to the
>> 8th bin (numbered 7 in snapshots), for the 9th bin the angle "resets" to
>> a lower value and the trend continues for the few remaining bins. This
>> seems somewhat related to the phase per projection (the phase wraps
>> after the 7th projection).
>>
>> rtkfourdfdk --geometry geometry.xml --path path --regexp
>> ''projections.mha'' --output CBCT_4D.mha --verbose --spacing 1,1,1
>> --hann 5.0 --hannY 5.0 --pad 0.2 --hardware cuda --dimension 410,264,410
>> --origin -205,-131,-205 --signal phase.txt
>>
>> Any guidance on this topic would be appreciated.
>>
>> Regards
>> Guillaume
>>
>> -- 
>> Dr. Guillaume Landry
>> Ludwig Maximilians University (LMU) Munich 
>> Medical Physics
>> Am Coulombwall 1
>> 85748 Garching
>> Tel:+49 (0) 89 289-14077
>> Fax:+49 (0) 89 289-14072
>>
>>
>>
>>
>

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