[Castor-users] TOF Reconstruction ERROR

Fri Mar 25 16:28:08 CET 2022

Greetings,

Maybe I am missing something, but why did you multiply the difference in arrival time by 10^12? GATE TOF data are in ps (if my memory serves me correctly) and CASToR requires TOF data in ps, right?

Bests,
Maxime Toussaint
________________________________
De : Castor-users <castor-users-bounces at lists.castor-project.org> de la part de Shwan K <ksh2454178 at naver.com>
Envoyé : 23 mars 2022 01:31
À : castor-users at lists.castor-project.org <castor-users at lists.castor-project.org>; Shwan K <ksh2454178 at naver.com>
Objet : [Castor-users] TOF Reconstruction ERROR

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  다운로드 기간: 2022/03/23 ~ 2022/04/22

Dear CASToR Users and Developers,

Hi I am Suhwan.

I'm having trouble doing TOF reconstruction. I checked the castor manual to make a '.Cdf' file without using the 'castor-GATERootToCastor' command. (Table 3)

The non-tof image reconstruction performed well.

However, the image of Tof image reconstruction is strange.

I checked 'Table 3' to perform non-tof reconstruction and tof reconstructionf and proceeded with the following procedure.

[X]

[non-tof reconstruction]

1. I extracted 'time', 'crystal ID1', and 'crystal ID2' after GATE simulation to proceed with non-tof reconstruction.

2. Using Matlab, 'time', 'crystal ID1', and 'crystal ID2' were combined. And I changed them to 'uint32' type.

3. As shown in the picture below, the image of the Phantom came out well.

[X]

[tof-reconstruction]

1. For tof reconstruction, 'time', 'crystal ID1', and 'crystal ID2' were extracted after GATE simulation. And to add TOF, the difference between 'time1' and 'time2' was calculated. ((time2 - time1)*1000000000000)

2. Using Matlab, 'time', 'time2 - time1', 'crystal ID1', and 'crystal ID2' were combined. And changed to 'uint32' type.

3. And the following text was added to the '.Cdh' file. TOF information flag: 1 TOF resolution (ps): 168.7 List TOF measurement range (ps): 1999.99

4.Tof reconstruction image came out strange as below.

[X]

I don't know what's wrong.

I have one more question. Why are the corners of the image bright?

[X]

Any advice and suggestion will be greatly appreciated. Thank you!

Thanks

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