[Gate-users] Measurement setting and Output(.mhd) (Emmanuel Marfo)

이호연 leehoy12345 at gmail.com
Wed Jun 14 02:18:20 CEST 2017 

Hello, Emmanuel,

1. In my experiece, The set time slice is time interval between
measuerments, set time start is starting time of entire measurements, and
the set time stop is end point of the measurenets.

If you set it as given in your qeustion

  *   /gate/application/setTimeSlice   1 s
  *   /gate/application/setTimeStart   0 s
  *   /gate/application/setTimeStop    1 s

the measurement starts at 0 second, and end after 1 second. Since time step
between measurement is 1 second, so it will produce 2 output (I'm not sure
the measurement including last time slot or not, if in doesn't include last
time stop an output will bi produced). According to the manual(or maybe
wiki) page, I is also related to temporal dependency of the measurements,
like mAs is CT. But I'm not sure it works as we usually think, because I
didn't tried to compare it.

2. I don't have experience in analyzing mhd format files. But I think the
raw format file created, since you turned on raw format output. If you
don't need raw format output, you can turn it off at output.mac. But before
you do that, check any difference in raw format file and mhd format files.

I'm usually dealing with CT or x-ray projection data and I'm more
comfortable with raw format file. Since I can read it in various
environments, including MATLAB. But to read mhd format files, I needed
external libraires in some environments.

3. If you provided energy spectrum to GATE, you could analyze the provided
energy spectrum. <- this would be the simplest

If you want to analyze measured energy spectrum, you can use root format
file given as result of simluation. It contains lots of information,
including energy spectrum, source posision, measurement position, etc. <-
this would be second simplest one

The most difficult option would be using measure energy spectrum using
spectroscopic detector.

Bests
-Hoyeon

2017년 6월 13일 (화) 오후 7:00, <
gate-users-request at lists.opengatecollaboration.org>님이 작성:

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>    1. Need Help Saving Video Format of Simulation in OGLSX      Viewer
>       (Robert Wilson)
>    2. Measurement setting and Output(.mhd) (Emmanuel Marfo)
>
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Mon, 12 Jun 2017 15:23:52 -0700
> From: Robert Wilson <rkwilson at mail.sdsu.edu>
> To: gate-users <Gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Need Help Saving Video Format of Simulation in
>         OGLSX   Viewer
> Message-ID:
>         <CAPjk1AwNMduj4gowk=nxJqwtFxe6WO2CYnG10hOPDM+SOS=
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>
> Hello, all.
>
> I'm in a bit of a pinch and need some help ASAP. I have several simulations
> that invoke time dependent motion, and I am trying to save the
> visualization of the simulation as a video. There is a lot of info out
> there about using different programs, but I'm in a time crunch and I don't
> have time to sift through it all. Does anyone here have a preferred method
> for doing this? And do you possibly have sample macro code that you would
> be willing to share with me? Any help with this would be very much
> appreciated. Thank you in advance.
>
> Best regards,
> *R. Kevin Wilson*
>
> San Diego State University | *2017*
> Department of Physics | *M.S Medical Physics*
> Radiation Detection Measuring & Modeling Laboratory
> *PET/SPECT Modeling - Gate & GEANT4*
>
>
>
> Clemson University | *2015*
> College of Engineering & Science
> Department of Physics & Astronomy | *B.S. Applied Physics*
> CU EBIT & Atomic Physics Laboratory *|* *Intern Recipient and Student
> Researcher*
>
>
> rkwilson at mail.sdsu.edu
> rkwilso at g.clemson.edu
> (828) 216-5310
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> Message: 2
> Date: Tue, 13 Jun 2017 08:39:10 +0000
> From: Emmanuel Marfo <emmanuel.marfo at postgrad.otago.ac.nz>
> To: "gate-users at lists.opengatecollaboration.org"
>         <gate-users at lists.opengatecollaboration.org>
> Subject: [Gate-users] Measurement setting and Output(.mhd)
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>
> Hi Gate-Users,
>
>   1.  Please, I want to know more explanation of the below command line
> which is normally used for the later part of the simulation script.  I have
> attached my macros for your perusal. However, I have challenges and a
> couple of questions to ask
>
>   *   /gate/application/setTimeSlice   1 s
>   *   /gate/application/setTimeStart   0 s
>   *   /gate/application/setTimeStop    1 s
>
> 2. Please, I am also trying to use MATLAB to analyse the Data Output in my
> simulation, I used .mhd for the actors but I get two output results in .mhd
> and .raw format, and I do not how to analyse them or which one contains the
> essential information.  Can you suggest an easy format I could use in
> Matlab and if there is any script in Matlab to help my analysis?
>
>
> 3. Please, what is the simple way to analyse  Gate energy spectrum? Thanks
>
>
> Best regards,
>
> Emmanuel Marfo
>
> University of Otago
>
> Student
>
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-- 
----------------------------------------------------------------
Hoyeon Lee
Ph.D candidate
Medical Imaging and Radiotherapeutics Lab.
Dept. of Nuclear and Quantum Engineering
KAIST

*https://github.com/leehoy <https://github.com/leehoy>*
leehoy12345 at gmail.com
+82 42-350-3868
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