Class that manages the data update step of analytic projection. More...

#include <oComputeProjection.hh>

Collaboration diagram for oComputeProjection:

Public Member Functions
	oComputeProjection (oImageDimensionsAndQuantification *ap_ImageDimensionsAndQuantification)
	oComputeProjection constructor. More...

	~oComputeProjection ()
	oComputeProjection destructor. More...

int	DataUpdateStep (vDataFile ap_DataFile, oProjectionLine a2p_Line, oImageSpace ap_Image, vEvent ap_Event, int a_fr, int a_rg, int a_cg, int th, uint32_t a_timestamp)
	Perform the forward-projection, and send the result to the datafile for writing. Implements random Poisson noise. Write the result in the projection image matrix (only implemented for SPECT). More...

int	InitNoiseModel (string aNoiseModel)
	This is a premature implementation of noise model initialization for analytic simulator. Currently, only the Poisson noise can be selected. More...

uint32_t	GetPoissonNoise (int32_t a_lambda)
	Generate a Poisson random variable from a provided lambda. More...

void	SetVerbose (int a_verboseLevel)
	set verbosity More...

Private Attributes
oImageDimensionsAndQuantification *	mp_ID

int	m_verbose

bool	m_noiseModelEnabled

Detailed Description

Class that manages the data update step of analytic projection.

The DataUpdateStep computes the data update step and manages Poisson RNG
For SPECT, the image of the projection is written in ImageSpace->m2p_projectionImage
This implementation will be subjected to major modifications with the next update of the analytic simulator tools.

Definition at line 24 of file oComputeProjection.hh.

Constructor & Destructor Documentation

oComputeProjection::oComputeProjection ( oImageDimensionsAndQuantification * ap_ImageDimensionsAndQuantification )

oComputeProjection constructor.

Parameters

ap_ImageDimensionsAndQuantification Initialize the member variables to their default values.

Definition at line 31 of file oComputeProjection.cc.

oComputeProjection::~oComputeProjection ( )

oComputeProjection destructor.

Definition at line 47 of file oComputeProjection.cc.

Member Function Documentation

int oComputeProjection::DataUpdateStep	(	vDataFile *	ap_DataFile,
		oProjectionLine *	a2p_Line,
		oImageSpace *	ap_Image,
		vEvent *	ap_Event,
		int	a_fr,
		int	a_rg,
		int	a_cg,
		int	th,
		uint32_t	a_timestamp
	)

Perform the forward-projection, and send the result to the datafile for writing.
Implements random Poisson noise.
Write the result in the projection image matrix (only implemented for SPECT).

Parameters

ap_DataFile	: pointer to the datafile which manage output data writing
a2p_Line	: pointer to the structure containing system matrix components
ap_Image	: pointer to the image space to access forward/attenuation/projection images
ap_Event	: pointer to the structure containing the event geometric indices
a_fr	: frame index
a_rg	: respiratory gate index
a_cg	: cardiac gate index
a_timestamp	: event timestamp