[ Identification | Description | Input parameters | Links ]

The `Tomography` Instrument

Instrument to study tomographic imaging by means of the new V_sample feature of OFF shape samples.

Identification

Site: Templates
Author: Peter Willendrup, based on work by Reynald ARNERIN
Origin: Risoe
Date: June 20th, 2008

Description

Instrument to study tomographic imaging by means of the new V_sample feature of OFF shape samples.

Example: mcrun Tomography.instr offfile=bunny.off -n1e4 -N18 omega=0,340 -d TomoScan
(Note that to achieve proper statistics for tomographic reconstruction, MUCH higher ncounts
are needed)

Use the provided Matlab tomo_recon.m function (requires imaging toolbox, PGPLOT output data
and a Unix/Mac) in the tools/matlab folder to reconstruct a 3D volume of the object. Use e.g.
isosurface to do thresholding for extraction of the object surface.

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
geometry	string	Name of the OFF file describing the sample shape	"socket.off"
omega	deg	Sample rotation around y	0
sigma_abs	barn	Sample absorption xs	100
frac_scatt	1	Fraction of neutrons to scatter in the sample	0
div_v	deg	Source vertical divergence (angular height)	1e-4
div_h	deg	Source horisontal divergence (angular width)	1e-4
source_w	m	Source width	0.4
source_h	m	Source height	0.2
det_w	m	Detector width	0.4
det_h	m	Detector height	0.2
opts			"x bins=80 y bins=40"

The Tomography Instrument

Identification

Description

Input parameters

Links

The `Tomography` Instrument