rtownson
commented
3 days ago I can't reproduce the problem. Here is my input file, it gives identical dose in region 2 between ausgab dose scoring and a calculation geometry:
:start geometry definition:
# WATER PHANTOM #
:start geometry:
name = surrounding_water_box
library = egs_box
box size = 15 15 15
:start media input:
media = H2O521ICRU
:stop media input:
:start transformation:
translation = 0 0 7.5
:stop transformation:
:stop geometry:
# INFINITE CYLINDER OF RADIUS 2.5 mm
:start geometry:
library = egs_cylinders
type = EGS_ZCylinders
name = sensitive_cylinder
midpoint = 0 0 0
radii = 0.25 # cm
:stop geometry:
# PLANES FOR 0 to 100 mm CYLINDERS step of 1 mm
:start geometry:
library = egs_planes
type = EGS_Zplanes
name = cylind_planes
positions = 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1\
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2\
2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3\
3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4\
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5\
5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6\
6.1 6.2 6.3 6.4 6.5 6.6 6.7 6.8 6.9 7\
7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8\
8.1 8.2 8.3 8.4 8.5 8.6 8.7 8.8 8.9 9\
9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9 10
:stop geometry:
# SPLIT INFINITE CYLINDER WITH PLANES
:start geometry:
library = egs_ndgeometry
name = phantom_cylinders
dimensions = cylind_planes sensitive_cylinder
:start media input:
media = H2O521ICRU
:stop media input:
:stop geometry:
# UNION INSTEAD OF ENVELOPE BUT HAVE TRIED BOTH WAYS AND HAS SAME RESULT (FAR BELOW) #
:start geometry:
name = water_phantom_not_moved
library = egs_gunion
geometries = phantom_cylinders surrounding_water_box
:stop geometry:
simulation geometry = water_phantom_not_moved
:stop geometry definition:
:start scoring options:
##### EACH CYLINDER SPECIFIED INDIVIDUALLY - so 100 of these definitions, see below
:start calculation geometry:
geometry name = water_phantom_not_moved
cavity regions = 2 # repeated from 2 to 101
cavity mass = 1
:stop calculation geometry:
:stop scoring options:
:start run control:
#ncase = 1e9
ncase = 1e5
nbatch = 10
:stop run control:
:start ausgab object definition:
# WATER AGAIN
:start ausgab object:
library = egs_dose_scoring
name = doseScoring
volume = 1
dose start region = 2 # first cylinder along z axis is region number 2
dose stop region = 101 # last cylinder along z axis is region number 101
:stop ausgab object:
:stop ausgab object definition:
:start source definition:
:start source:
library = egs_parallel_beam
name = my_source
:start shape:
library = egs_circle
radius = 1
:stop shape:
direction = 0 0 1
charge = 0
:start spectrum:
type = monoenergetic
energy = 6
:stop spectrum:
:stop source:
:stop source definition:
erjft
Describe the bug Hi I have a 10 cm thick cylinder of 0.25 cm radius that is cut up into 1 mm sections along the z axis, and inscribed in a square water phantom of 15x15x15 cm^3. I want to score the dose in all the cylindrical volumes from an electron/photon beam.
The ausgab output, when I choose the same regions, is different from the scoring options output. For scoring options this would mean repeating :start calculation geometry: definition 100 times which may be painful.
Then the output is:
When I use the scoring options with start calculation geometry it gives good results. I don't have the command line output but can attach a csv - it's just a depth dose for photons of 6 MV.
To Reproduce
Expected behavior Expect results to be consistent for dose between ausgab and scoring options versions of obtaining the dose in the regions
Operating system
EGSnrc version Most recent - installed from Github on 18/11/24
Notes