[Gate-users] The design of CylindricalPET system with Rsectors of different structures

Wed Apr 30 13:04:01 CEST 2008

Hi Jinxia,

I don't think cylindricalPET is made for that

Using the cylindrical PET system, when you attach a volume to rsector, the
pointer representing the volume is transmitted to the rsector, so when you
attach two volumes to rsector, only the second will be attached to.

An alternative to have 4 rsectors (if you don't use module and submodule) is
to define a volume representing the module to a quarter of your rsector and
repeat it four times, so you can have 4 rsectors except that their names are
module! But I’m not sure about that
 I never did it before!

Cheers,

Susana Branco Silva

untitled

Faculdade de Ciências da Universidade de Lisboa

Campo Grande, 1749-016 Lisboa, Portugal
Phone: (+351) 21 750 01 77 ext.: 20515
Fax:  (+351) 21 750 00 30

 <mailto:susana.silva at fc.ul.pt> email: susana.silva at fc.ul.pt

url: www.ibeb.fc.ul.pt

From: jinxia guo [mailto:babygjx at gmail.com] 
Sent: quarta-feira, 30 de Abril de 2008 11:32
To: Susana Branco Silva
Subject: Re: [Gate-users] The design of CylindricalPET system with Rsectors
of different structures

Hi Susana,

I have tried ,but it failed too.Because all resctors come from the repeat of
one rsector,it is difficult to repeat a structure that I want.

I draw a picture for the structure. In the picture,a rectangle represents a
resctor.All the rectangles have same size. 

Can you have any methods to realize it or any other suggestion ? Thank you
for your help!

Best wishes,

2008/4/28 Susana Branco Silva <susana.silva at fc.ul.pt>:

Hi Jinxia,

I have the same opinion as Weiqingyang

Maybe  you can use the scanner system which can be designed  in your own
geometries. I think will be more simple!

Try to do it,
, and Good luck!

Cheers,

Susana

From: jinxia guo [mailto:babygjx at gmail.com] 
Sent: domingo, 27 de Abril de 2008 2:08
To: Susana Branco Silva
Subject: Re: [Gate-users] The design of CylindricalPET system with Rsectors
of different structures

Firstly,thank you very much for the answer!  I am sorry I haven,t describe
the question clearly.

For DualPET,I have designed two planes before and the structure of the two
planes are same.Now I want to design a PET system with four planes.

The first plane: number of rsector 1, number of module 13*9,number of
crystal 8*8;

The second Plane : number of rsector 1, number of module 13*13,number of
crystal 8*8;

The third Plane is same as the first Plane.The fourth Plane is the same as
the second plane.

Hope your reply soon!
Best wishes!

2008/4/27 Susana Branco Silva <susana.silva at fc.ul.pt>:

Hi Jinxia,

As you can read in the User's Guide (pag. 51):

cylindricalPET is defined as a cylinder in the world, with a non zero inner
radius

-       rsector (depth=1) is defined as a box, and repeated with a ring
repeater in cylindricalPET

-       module (depth=2) is a box inside rsector. It is repeated by a
cubicarray repeater with no X

repetition (repeatNumberX = 1). This level is optional.

-       submodule(depth=3) is a box inside module. It is repeated by a
cubicarray repeater with no X

repetition (repeatNumberX = 1). This level is optional.

-       crystal (depth=4) is a box inside submodule. It is repeated by a
cubicarray repeater with no X

repetition (repeatNumberX = 1)

-       layer (depth=5) is a (or several, in the case of the phoswich
system) radially arranged box(es)

inside crystal. Do not use a repeater for layers, but build them one by one
in your macro. layer

must be set as a sensible detector with the macro command: /attachCrystalSD.

You only can define one rsector level

What do you really want to define as your geometry?

Cheers,

Susana Branco Silva

untitled

Faculdade de Ciências da Universidade de Lisboa

Campo Grande, 1749-016 Lisboa, Portugal
Phone: (+351) 21 750 01 77 ext.: 20515
Fax:  (+351) 21 750 00 30

 <mailto:susana.silva at fc.ul.pt> email: susana.silva at fc.ul.pt

url: www.ibeb.fc.ul.pt

From: gate-users-bounces at lists.healthgrid.org
[mailto:gate-users-bounces at lists.healthgrid.org] On Behalf Of jinxia guo
Sent: sábado, 26 de Abril de 2008 14:16
To: gate-users at lists.healthgrid.org
Subject: [Gate-users] The design of CylindricalPET system with Rsectors of
different structures

Dear users:
     I want to design a cylindrical PET system with four Rsectors .In this
system,the Rsectors have
 different structures.The number of modules of theirs is not equal.I have
tried a few ways to do that ,
but all failed.Can someone tell me how to do that? 

Thank you very much!
Best wishes! 

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