[Gate-users] Drilling a Hole on the Phantom

[Omar Bin Sheetan]

It looks to me that the two volumes are overlapping. Depending on what you think is more appropriate for your experiment, you may want to adjust the inner radius of the bigger one or just make one the daughter of the other.

Regards
________________________________
From: Gate-users <gate-users-bounces at lists.opengatecollaboration.org> on behalf of Xinjie Cao <xinjie.cao at stonybrook.edu>
Sent: Friday, July 31, 2020 9:22 PM
To: gate-users at lists.opengatecollaboration.org <gate-users at lists.opengatecollaboration.org>
Subject: Re: [Gate-users] Drilling a Hole on the Phantom

Hi Omar,

Thanks for your response. Yes there is an overlap. From my understanding of your description, did you mean attributing the hole cylinder to another mother volume so the volumes under the same mother volume won't overlap with each other?

Actually I just want to drill a hole on a plastic phantom with the same length as the phantom, and the hierarchy is very simple, a solid cylinder plastic phantom under the world level with a same length cylinder rod inserted in it. Do you think it is applicable without overlap?

Best,

On Fri, Jul 31, 2020 at 2:13 PM Omar Bin Sheetan <omar.binsheetan at postgrad.manchester.ac.uk<mailto:omar.binsheetan at postgrad.manchester.ac.uk>> wrote:
Hello Xinjie,

As long as there’s no overlapping and every daughter volume is contained within its mother volume, I think things should be fine. In my understanding, the daughters of  a volume should not intersect (overlap) with each other.

In your case, is there an overlap? Have you chosen the right mother volume for your air phantom?

Regards

Omar


On Jul 31, 2020, at 3:37 PM, Xinjie Cao <xinjie.cao at stonybrook.edu<mailto:xinjie.cao at stonybrook.edu>> wrote:


Dear all,

I used to implement the hole drilling on a phantom as followed,
```
/gate/world/daughters/name phantom1
/gate/world/daughters/insert cylinder
/gate/phantom1/placement/setTranslation           0.0 0.0 0.0 mm
/gate/phantom1/geometry/setRmax                   100. mm
/gate/phantom1/geometry/setHeight                 500 mm
/gate/phantom1/setMaterial                              Polyethylene
#/gate/phantom/vis/forceWireframe
#/gate/phantom/vis/setColor green
/gate/phantom1/attachPhantomSD

/gate/world/daughters/name phantom2
/gate/world/daughters/insert cylinder
/gate/phantom2/placement/setTranslation           0.0 -25.0 0.0 mm
/gate/phantom2/geometry/setRmax                   3.0 mm
/gate/phantom2/geometry/setHeight                 500 mm
/gate/phantom2/setMaterial                               Air
#/gate/phantom/vis/forceWireframe
#/gate/phantom/vis/setColor green
/gate/phantom2/attachPhantomSD
```
But I have been always thinking whether the air phantom I insert works as the drilled hole? Or does it work as a cylinder mixed with polyethylene and air?
Another way to say is whether a new phantom placed within the other phantom volume will take the place of the original material or mix with it?
Any answer would be highly appreciated! Thanks!

Best,
Xinjie
_______________________________________________
Gate-users mailing list
Gate-users at lists.opengatecollaboration.org<mailto:Gate-users at lists.opengatecollaboration.org>
http://lists.opengatecollaboration.org/mailman/listinfo/gate-users


--
....................................................
Xinjie Cao
M.E. / Ph.D. student
Research Project Assistant
Department of Electrical and Computer Engineering & Radiology
Novel Medical Imaging Technologies Lab
Health Science Center Level 8
Stony Brook, NY 11794-8460
Tel: +1 (631)202-9445
you.stonybrook.edu/goldan/people/<https://you.stonybrook.edu/goldan/people/>
email: xinjie.cao at stonybrook.edu<mailto:xinjie.cao at stonybrook.edu>

 [https://docs.google.com/uc?export=download&id=12iMPAuaMtpKRdkcmBleVsP6iWiM4wlm_&revid=0B_TLWOu4jP1eWnFFRW9qQXlicTY3ZTVzWnR5QkRVY3RRT3JVPQ]    [https://drive.google.com/a/stonybrook.edu/uc?id=17TB1Ha3enD8HC5e_Ez238vpeBF92aCgH&export=download]
....................................................
It is prohibited to distribute or publish the files attached to any other people unless you get permission from the writer himself. All rights reserved.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opengatecollaboration.org/pipermail/gate-users/attachments/20200731/d010f7a3/attachment.html>