Gabriele Cosmo
105 lines
3.9 KiB
Plaintext
105 lines
3.9 KiB
Plaintext
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
| Dicom |
|
|
+ +
|
|
| README |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
|
|
The DICOM application has been developed by the Geant4 users:
|
|
Louis Archambault,*Luc Beaulieu, +Vincent Hubert-Tremblay.
|
|
|
|
*Centre Hospitalier Universitaire de Quebec (CHUQ),
|
|
Hotel-Dieu de Quebec, departement de Radio-oncologie
|
|
11 cote du palais. Quebec, QC, Canada, G1R 2J6
|
|
tel (418) 525-4444 #6720
|
|
fax (418) 691 5268
|
|
web : thomson.phy.ulaval.ca/phys_med
|
|
|
|
+ Université Laval, Québec (QC) Canada
|
|
|
|
This example illustrates a preliminary version of a Geant4 interface
|
|
to the DICOM image format.
|
|
The example consists in modeling a phantom inside a Geant4 application,
|
|
given the dicom files describing the phantom.
|
|
|
|
--->1) Introduction
|
|
|
|
DICOM images are read and used to model the geometry set-up for simulation.
|
|
|
|
Three file .dcm give the experimental set-up
|
|
(in terms of tissues and tissue geometry position) are read.
|
|
It is possible to visualise the reproduced experimental
|
|
set-up thanks to the use of visualisation packages.
|
|
|
|
You can find the phantom reproduced in the image PhantomCT.jpg.
|
|
In the application the phantom is placed on a table.
|
|
|
|
---> 2) Installation:
|
|
|
|
-example enviroment with the compiler 3.2.3
|
|
-a standard Geant4 example GNUmakefile is provided
|
|
|
|
setup with:
|
|
compiler = gcc-3.2.3
|
|
G4SYSTEM = linux-g++
|
|
|
|
The following environment variables need to be set:
|
|
G4LEDATA: points to low energy data base - G4EMLOW2.3
|
|
|
|
visualisation package: OpenGL
|
|
|
|
---> 3) Run the example:
|
|
|
|
- batch mode:
|
|
-dicom vis.mac :the geometry is visualised with OPENGL
|
|
-dicom run.mac :no geometry visualisation
|
|
|
|
- interactive mode:
|
|
dicom
|
|
the file default.mac is read in order to visualise the phantom.
|
|
|
|
--->4) Some details :
|
|
|
|
The DICOM images pixel values represent CT (Hounsfield) numbers and they should be
|
|
converted, first, to a given density and then to a material type. The relation between
|
|
CT number and density is more or less linear. The one used in this program is represented
|
|
in the table below.
|
|
|
|
#####################################################
|
|
# Density Range Material #
|
|
#---------------------------------------------------#
|
|
# mg/cm3 - #
|
|
#---------------------------------------------------#
|
|
# [ 0.207 , 0.227 ] Lungs (inhale) #
|
|
# [ 0.481 , 0.534 ] Lungs (exhale) #
|
|
# [ 0.919 , 0.979 ] Adipose #
|
|
# ] 0.979 , 1.004 ] Breast #
|
|
# ] 1.004 , 1.043 ] Phantom #
|
|
# ] 1.043 , 1.109 ] Liver #
|
|
# ] 1.109 , 1.113 ] Muscle #
|
|
# ] 1.113 , 1.217 ] Trabecular Bone#
|
|
# [ 1.496 , 1.654 ] Dense Bone #
|
|
#####################################################
|
|
|
|
Data taken from the International Commission on Radiation Units and measurements (ICRU)
|
|
report 46 was used to build the materials (lung, liver, breast, bones, ...)
|
|
|
|
5) Contacts
|
|
|
|
If you have any questions or wish to notify of updates and/or modification
|
|
please contact:
|
|
|
|
*Louis Archambault at louis.archambault@phy.ulaval.ca
|
|
|
|
*Luc Beaulieu at beaulieu@phy.ulaval.ca
|
|
|
|
+ Vincent Hubert-Tremblay
|
|
<tigre.2@sympatico.ca> or <vihut@phy.ulaval.ca>
|
|
|
|
*Centre Hospitalier Universitaire de Quebec (CHUQ),
|
|
Hotel-Dieu de Quebec, departement de Radio-oncologie
|
|
11 cote du palais. Quebec, QC, Canada, G1R 2J6
|
|
tel (418) 525-4444 #6720
|
|
fax (418) 691 5268
|
|
web : thomson.phy.ulaval.ca/phys_med
|
|
|
|
+ Université Laval, Québec (QC) Canada |