[Gate-users] How to simulate Lu-176 in LSO crystal

[Emilie Gaudin]

Hi Zhengzhi,

Maxime was absolutely right saying the noise module simulate the intrinsic radioactivity. It was well established and demonstrated since many years (just google it).
 You only need to define your noise (mean std lambda) as you know how your detector react.
You can create a source for each crystal but why tho ... In my opinion it's a terrible ideas since your sources are user dependent and  your simulations will be much slower.

Have a nice day !

Émilie

________________________________
De : Gate-users <gate-users-bounces at lists.opengatecollaboration.org> de la part de Arnulfo Martinez-Davalos <arnulfo at fisica.unam.mx>
Envoyé : 11 juin 2020 15:03
À : gate-users at lists.opengatecollaboration.org <gate-users at lists.opengatecollaboration.org>
Objet : Re: [Gate-users] How to simulate Lu-176 in LSO crystal


Dear Zhengzhi,

Please let me call your attention to a series of papers our group has published regarding the intrinsic radioactivity in LYSO crystals due to Lu-176:

- Alva-Sánchez H, et al., “Understanding the intrinsic radioactivity energy spectrum from 176Lu in LYSO/LSO scintillation crystals”, Nature Sci. Rep. (2018) 8:17310 (https://doi.org/10.1038/s41598-018-35684-x<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.1038%2Fs41598-018-35684-x&data=02%7C01%7Cemilie.odette.gaudin%40usherbrooke.ca%7Cc1f6a6661e3e4b40b85d08d80e3a1df7%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274990921014034&sdata=Yz4MiMo6YwF6srTIDNTo9vV5ek1xIAfl4d4ymbv%2B6WU%3D&reserved=0>)

- Enríquez-Mier-y-Terán FE, et al., “GATE simulation of the intrinsic radioactivity in LYSO scintillation crystals”, Nucl. Instr. Meth. B 454 (2019) 1-5. (https://doi.org/10.1016/j.nimb.2019.06.001<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.1016%2Fj.nimb.2019.06.001&data=02%7C01%7Cemilie.odette.gaudin%40usherbrooke.ca%7Cc1f6a6661e3e4b40b85d08d80e3a1df7%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274990921024033&sdata=xihfZcHk7tAb9Wfx%2Fz4hbhENH%2BGW%2F0xk2fY5fOvvO8Y%3D&reserved=0>).

- Enríquez-Mier-y-Terán FE, et al., “Coincidence energy spectra due to the intrinsic radioactivity of LYSO scintillation crystals”, EJNMMI Physics (2020) 7:21 (https://doi.org/10.1186/s40658-020-00291-1<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.1186%2Fs40658-020-00291-1&data=02%7C01%7Cemilie.odette.gaudin%40usherbrooke.ca%7Cc1f6a6661e3e4b40b85d08d80e3a1df7%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274990921024033&sdata=zYkJkVLbAnyMLMvaCisYCcaLHeHaN43dbbk3DdqAeRw%3D&reserved=0>).

For the second and third ones we actually used the ion source for Lu-176 in GATE v8.1, and it worked just fine. I hope you find this information useful.

Best regards,
Arnulfo

Arnulfo Martinez-Davalos, PhD
Instituto de Fisica, UNAM
A.P. 20-364
01000 CDMX
MEXICO

On 2020-06-11 12:09 AM, Albert Grace Lieu wrote:
Dear Gate users and developers,

There are a couple of papers [1<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Faapm.onlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1118%2F1.4824694&data=02%7C01%7Cemilie.odette.gaudin%40usherbrooke.ca%7Cc1f6a6661e3e4b40b85d08d80e3a1df7%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274990921034020&sdata=NpKzPik242hOOn8fcm1BBvkPABRxzwBaNdSQFBBave4%3D&reserved=0>,2<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fieeexplore.ieee.org%2Fdocument%2F5751205&data=02%7C01%7Cemilie.odette.gaudin%40usherbrooke.ca%7Cc1f6a6661e3e4b40b85d08d80e3a1df7%7C3a5a8744593545f99423b32c3a5de082%7C0%7C0%7C637274990921034020&sdata=JHa%2F1Vlq6s%2FpXSz6ReUa1EpWos1YriNuXMKGIwZaeN4%3D&reserved=0>] addressing the importance of adding the simulation of Lu-176 in Lutetium based crystal in GATE simulation. I try to do this to my simulated PET system that has thousands of pieces of crystals (created with linear and cubic array repeater). My general idea of implementing this is to create a Lu176 ion source and then attach it to my crystals. However,  when I do:

/gate/source/Lu176/attachTo Crystal

the Lu176 is only attached to a single piece of crystal (which can be visualized with /gate/source/Lu176/visualize 1000 red 3).  Has anyone implemented this before? Could you please share your thoughts?

Thanks a lot. Greatly appreciated.

Zhengzhi



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