[gate-users] ECAT7 Sinogram size and STIR reconstruction

[Schmidtlein, Ross/Sloan-Kettering Institute]

Another factor the affects the length of STIR runs is the zoom factor.
Smaller factors run much faster. 

ross

-----Original Message-----
From: gate-users-bounces at lphe1pet1.epfl.ch
[mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of Peter M.
Bloomfield
Sent: Wednesday, May 18, 2005 10:02 AM
To: GATE feedback and helpline for Users
Subject: Re: [gate-users] ECAT7 Sinogram size and STIR reconstruction


How many projection bins and sinogram views are there in a single
sinogram, 
Also how many crystal rings are there the scanner being siinulated? 

P
On Wednesday 18 May 2005 09:54, Nikolaos Karakatsanis wrote:
> Hello users,
>
> I have produced an ECAT7 output file using version 1.2.0 of Gate. The 
> ECAT7 parameters I have chosen for the ecat system are: mashing 1
> span 5
> maxringdiff 22
> The time slice I have used was equal to the total time of
experiment.(1
> frame)
> The size of the output file was 100MB approximately.However when I
> attempted to reconstruct this file with STIR it has taken a lot of
time
> (i.e. several hours).
> As a result I would like to ask if the size of 100MB using the above
> parameters is normal?A user of STIR told us that this size seems to be
big.
> Furthermore it would be useful for me to be informed whether 3-4 hours
of
> reconstruction are a normal duration for the reconstruction of an
ECAT7
> file of 100MB.
> Finally I would like to know if a reduced size of an ECAT7 sinogram
(for
> example by increasing the value of span parameter) will result in an
> unacceptable low-quality reconstructed image!
>
> Nicolas Karakatsanis
> Nuclear Imaging Medical Lboratory
> School of Electrical & Computer Engineer
> National Technical University Of Athens www.biosim.ntua.gr/NIMlab
>
>
> I would like to
>
>
> _______________________________________________
> gate-users mailing list
> gate-users at lphe1pet1.epfl.ch
> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users

-- 
Peter M. Bloomfield
Physicist,
PET Centre,
Centre for Addiction and Mental Health,
250 College St.,
Toronto, Ontario,
Canada M5T 1R8
Tel: 416 535 8501 Ext. 4243

Registered Linux User #360164 at Linux Counter, http://counter.li.org
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