[Rtk-users] Tomosynthesis Reconstruction using RTK

[louie L]

Hi Andria,

Can you explain the setup with some more details? Which is the axis of rotation?
I think if the isocenter is on the detector, the sid should be set equal to the sdd.

Best regards,
Louie

Greetings from my iOS!

> On 04 Nov 2014, at 17:04, Hadjipanteli Andria (ROYAL SURREY COUNTY HOSPITAL NHS FOUNDATION TRUST) <andria.hadjipanteli at nhs.net> wrote:
> 
>> 
>> 
>> 
>> 
>> Dear all,
>> 
>> We used the FirstReconstruction.cxx code with minor changes to reconstruct a digital breast tomosynthesis stack of projections acquired using a Hologic Selenia Dimenions system. Unfortunately, the reconstructed
>>  image does not look as expected.
>> 
>> The characteristics of the geometry of the system are that the detector remains stationary while the x-ray tube moves around a centre of rotation located at the detector (see attached diagram). The
>>  changes we made to FirstReconstruction.cxx so that it represents the Hologic Geometry are that the sdd and sourceOffesetY both vary as a function of the rotation of the source (sid*sin(angleTheta)
>>  and sid*cos(angleTheta) respectively) while in all cases gantryAngle= 0, sid = 700 mm and isox = -detectorWidth/2. Our geometry definition is:
>> 
>> geometry->AddProjection(700,sdd,0,-isox,0,0,0,0,sourceOffsetY);
>> Please let me know if you have any ideas on what we might be doing
>>  wrong.  
>> 
>> Thank you for your help.
>> Kind regards,
>> Andria
> 
> ********************************************************************************************************************
> 
> This message may contain confidential information. If you are not the intended recipient please inform the
> sender that you have received the message in error before deleting it.
> Please do not disclose, copy or distribute information in this e-mail or take any action in reliance on its contents:
> to do so is strictly prohibited and may be unlawful.
> 
> Thank you for your co-operation.
> 
> NHSmail is the secure email and directory service available for all NHS staff in England and Scotland
> NHSmail is approved for exchanging patient data and other sensitive information with NHSmail and GSi recipients
> NHSmail provides an email address for your career in the NHS and can be accessed anywhere
> 
> ********************************************************************************************************************
> <NCCPM_TomoGeometry.pdf>
> _______________________________________________
> Rtk-users mailing list
> Rtk-users at public.kitware.com
> http://public.kitware.com/mailman/listinfo/rtk-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.creatis.insa-lyon.fr/pipermail/rtk-users/attachments/20141104/eb4d8c36/attachment.htm>
-------------- next part --------------
_______________________________________________
Rtk-users mailing list
Rtk-users at public.kitware.com
http://public.kitware.com/mailman/listinfo/rtk-users