[Rtk-users] Rtk-users Digest, Vol 27, Issue 3

Thu Nov 6 10:32:53 EST 2014

Dear Louie/Simon/Chao,

Thanks a lot for your help. Your suggestions have been useful.

Kind regards,

Andria

On 04/11/2014 17:09, "rtk-users-request at public.kitware.com"
<rtk-users-request at public.kitware.com> wrote:

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>Today's Topics:
>
>   1. Re: Tomosynthesis Reconstruction using RTK (louie L)
>   2. Re: Tomosynthesis Reconstruction using RTK (Simon Rit)
>   3. Re: Tomosynthesis Reconstruction using RTK (Chao Wu)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Tue, 4 Nov 2014 17:17:10 +0100
>From: louie L <ghostcz at hotmail.com>
>To: "Hadjipanteli Andria (ROYAL SURREY COUNTY HOSPITAL NHS FOUNDATION
>       TRUST)" <andria.hadjipanteli at nhs.net>
>Cc: "rtk-users at public.kitware.com" <rtk-users at public.kitware.com>
>Subject: Re: [Rtk-users] Tomosynthesis Reconstruction using RTK
>Message-ID: <SNT404-EAS1877AF519D0152FF69E0F0FB1860 at phx.gbl>
>Content-Type: text/plain; charset="us-ascii"
>
>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
>>
>>
>>*************************************************************************
>>*******************************************
>>
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>> 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.
>>
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>>staff in England and Scotland
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>> <NCCPM_TomoGeometry.pdf>
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>------------------------------
>
>Message: 2
>Date: Tue, 4 Nov 2014 17:55:06 +0100
>From: Simon Rit <simon.rit at creatis.insa-lyon.fr>
>To: louie L <ghostcz at hotmail.com>
>Cc: "Hadjipanteli Andria \(ROYAL SURREY COUNTY HOSPITAL NHS FOUNDATION
>       TRUST\)" <andria.hadjipanteli at nhs.net>, "rtk-users at public.kitware.com"
>       <rtk-users at public.kitware.com>
>Subject: Re: [Rtk-users] Tomosynthesis Reconstruction using RTK
>Message-ID:
>       <CAF0oig3VZ7iFmNBjSrAT9CHHccpLi4FdoFKjzY7YieF7tM7UpQ at mail.gmail.com>
>Content-Type: text/plain; charset="utf-8"
>
>Hi,
>When the source moves, along which axis of the detector is it? I would
>have
>expected it to move along the X axis.
>There is another option to set the geometry that might be easier for you,
>Reg23ProjectionGeometry
><http://www.openrtk.org/Doxygen/classrtk_1_1Reg23ProjectionGeometry.html>.
>In any case, your scheme is wrong and I agree with Louie, you should think
>of the source parameters as the coordinates if all angles are set to 0 so
>in your case sdd==sid.
>Simon
>
>On Tue, Nov 4, 2014 at 5:17 PM, louie L <ghostcz at hotmail.com> wrote:
>
>> 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
>>
>>
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>------------------------------
>
>Message: 3
>Date: Tue, 4 Nov 2014 18:08:11 +0100
>From: Chao Wu <wuchao04 at gmail.com>
>To: Simon Rit <simon.rit at creatis.insa-lyon.fr>
>Cc: "Hadjipanteli Andria \(ROYAL SURREY COUNTY HOSPITAL NHS FOUNDATION
>       TRUST\)" <andria.hadjipanteli at nhs.net>, "rtk-users at public.kitware.com"
>       <rtk-users at public.kitware.com>
>Subject: Re: [Rtk-users] Tomosynthesis Reconstruction using RTK
>Message-ID:
>       <CAH+sHrXxZChsaZSQaYL3Aa1mN0h682Wf1Nwq+wt2ExCearNttA at mail.gmail.com>
>Content-Type: text/plain; charset="utf-8"
>
>Agree, sdd==sid=700*cos(theta_in_the_picture). Another suspicious thing
>may
>be the projection shift (-isox,0). If the input projection are plain
>images
>from a real system without origin definition in its format, then the
>projection shift may be (0,-isoy) instead, with projection origin at the
>corner pixel.
>
>2014-11-04 17:55 GMT+01:00 Simon Rit <simon.rit at creatis.insa-lyon.fr>:
>
>> Hi,
>> When the source moves, along which axis of the detector is it? I would
>> have expected it to move along the X axis.
>> There is another option to set the geometry that might be easier for
>>you,
>> Reg23ProjectionGeometry
>>
>><http://www.openrtk.org/Doxygen/classrtk_1_1Reg23ProjectionGeometry.html>
>>.
>> In any case, your scheme is wrong and I agree with Louie, you should
>>think
>> of the source parameters as the coordinates if all angles are set to 0
>>so
>> in your case sdd==sid.
>> Simon
>>
>> On Tue, Nov 4, 2014 at 5:17 PM, louie L <ghostcz at hotmail.com> wrote:
>>
>>> 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
>>>
>>>
>>> _______________________________________________
>>> Rtk-users mailing list
>>> Rtk-users at public.kitware.com
>>> http://public.kitware.com/mailman/listinfo/rtk-users
>>>
>>>
>>
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>>
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