This class is used to represent any cylindrical PET scanner. More...

#include <iScannerPET.hh>

Inheritance diagram for iScannerPET:

Collaboration diagram for iScannerPET:

Public Member Functions
	iScannerPET ()
	iScannerPET constructor. Initialize the member variables to their default values. More...

	~iScannerPET ()
	iScannerPET destructor. More...

void	DescribeSpecific ()
	Implementation of the pure virtual eponym function that simply prints info about the scanner. More...

int	Instantiate (bool a_scannerFileIsLUT)
	Get mandatory informations from the scanner file and allocate memory for the member variables. More...

int	CheckParameters ()
	Check if all parameters have been correctly initialized. More...

int	Initialize ()
	Check general initialization and set several parameters to their default value. More...

int	BuildLUT (bool a_scannerFileIsLUT)
	Call the functions to generate the LUT or read the user-made LUT depending on the user choice. More...

int	GetPositionsAndOrientations (int a_index1, int a_index2, FLTNB ap_Position1[3], FLTNB ap_Position2[3], FLTNB ap_Orientation1[3], FLTNB ap_Orientation2[3], FLTNB ap_POI1=NULL, FLTNB ap_POI2=NULL)
	Get the central positions and orientations of the scanner elements from their indices. More...

int	GetRdmPositionsAndOrientations (int a_index1, int a_index2, FLTNB ap_Position1[3], FLTNB ap_Position2[3], FLTNB ap_Orientation1[3], FLTNB ap_Orientation2[3])
	Get random positions of the scanner elements and their orientations from their indices. More...

int	GetPositionWithRandomDepth (int a_index1, int a_index2, FLTNB ap_Position1[3], FLTNB ap_Position2[3])
	Get the positions and orientations of scanner elements from their indices, with a random depth. More...

int	GetTwoCorners (int a_index1, int a_index2, FLTNB ap_CornerInf1[3], FLTNB ap_CornerSup1[3], FLTNB ap_CornerInf2[3], FLTNB ap_CornerSup2[3])
	Get the cartesian coordinaters of the two opposite corners of a scanner element. More...

int	GetEdgesCenterPositions (int a_index1, int a_index2, FLTNB ap_pos_line_point1[3], FLTNB ap_pos_line_point2[3], FLTNB ap_pos_point1_x[4], FLTNB ap_pos_point1_y[4], FLTNB ap_pos_point1_z[4], FLTNB ap_pos_point2_x[4], FLTNB ap_pos_point2_y[4], FLTNB ap_pos_point2_z[4])
	Implementation of the pure virtual function from vScanner. Get the cartesian coordinaters of the center of the 4 edges of the detection elements. It is typically used for the Distance Driven projector. More...

int	GetSystemNbElts ()

int	IsAvailableLOR (int a_elt1, int a_elt2)
	Check if the LOR formed by the crystalf whose indices are passed in parameters is available according to the scanner restrictions. More...

int	GetGeometricInfoFromDataFile (string a_pathToDataFilename)
	Retrieve PET geometric informations from the datafile. More...

int	SetPETMaxAxialDiffmm (FLTNB a_maxAxialDiffmm)
	Set the maximal axial difference in mm between 2 crystals forming a lor. More...

void	ShowHelp ()
	Display help. More...

FLTNB	GetDetectionElementSizeTrans ()

FLTNB	GetDetectionElementSizeAxial ()

int	PROJ_GetPETSpecificParameters (FLTNB *ap_maxAxialDiffmm)
	Set pointers passed in argument with the related PET specific variables This function is used to recover these values in the datafile object. More...

Public Member Functions inherited from vScanner
	vScanner ()
	vScanner constructor. Initialize the member variables to their default values. More...

virtual	~vScanner ()
	vScanner destructor. More...

void	Describe ()
	A function used to describe the generic parts of the datafile. More...

int	GetScannerType ()

string	GetScannerTypeString ()

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

void	SetImageDimensionsAndQuantification (oImageDimensionsAndQuantification *ap_ID)
	Set the pointer to the image dimensions and quantification object. More...

FLTNB	GetDefaultBedDisplacementInMm ()

virtual int	SetRotDirection (string a_rotDirection)
	Set rotation direction of the system. More...

virtual int	GetSPECTSpecificParameters (uint16_t ap_nbOfProjections, uint16_t ap_nbHeads, FLTNB ap_acquisitionZoom, uint16_t ap_nbOfBins, FLTNB ap_pixSizeXY, FLTNB &ap_angles, FLTNB &ap_CORtoDetectorDistance, int ap_headRotDirection)
	Recover geometric SPECT specific parameters from the scanner to initialize the datafile. More...

virtual int	GetCTSpecificParameters (uint16_t ap_nbOfProjections, FLTNB &ap_angles, int *ap_detectorRotDirection)
	Recover geometric CT specific parameters from the scanner to initialize the datafile. More...

virtual int	PROJ_SetSPECTNbBins (uint16_t *ap_nbOfBins)
	Set SPECT number of Bins. More...

virtual int	PROJ_SetSPECTNbProjections (uint32_t a_nbOfProjections)
	Set SPECT number of views. More...

virtual int	PROJ_SetSPECTAngles (FLTNB *ap_projectionAngles)
	Set SPECT projection angles. More...

virtual int	PROJ_SetSPECTCORtoDetectorDistance (FLTNB a_CORtoDetectorDistance)
	Set distance between center of rotation and SPECT detectors. More...

virtual uint16_t	PROJ_GetSPECTNbProjections ()
	return the total number of projections for a SPECT acquisition More...

virtual uint16_t	PROJ_GetSPECTNbPixels ()
	return the total number of pixels for a SPECT reconstruction More...

Private Member Functions
int	LoadLUT ()
	Load a precomputed scanner LUT. More...

int	ComputeLUT ()
	Compute the LUT of the scanner from a generic (.geom) file. More...

int	GetLayer (int a_idx)
	Get the layer from which the 'a_index' crystal belongs to. More...

Private Attributes
int	m_nbLayers

int	m_nbCrystals

int *	mp_nbCrystalsInLayer

FLTNB *	mp_crystalCentralPositionX

FLTNB *	mp_crystalCentralPositionY

FLTNB *	mp_crystalCentralPositionZ

FLTNB *	mp_crystalOrientationX

FLTNB *	mp_crystalOrientationY

FLTNB *	mp_crystalOrientationZ

FLTNB *	mp_sizeCrystalTrans

FLTNB *	mp_sizeCrystalAxial

FLTNB *	mp_sizeCrystalDepth

FLTNB *	mp_meanDepthOfInteraction

FLTNB	m_minAngleDifference

FLTNB	m_maxAxialDiffmm

Additional Inherited Members
Protected Attributes inherited from vScanner
int	m_scannerType

int	m_verbose

oImageDimensionsAndQuantification *	mp_ID

bool	m_allParametersChecked

oMatrix *	mp_rotationMatrix

oMatrix *	mp_positionMatrix_ref

oMatrix *	mp_positionMatrix_out

int	m_rotDirection

FLTNB	m_defaultBedDisplacementInMm

Detailed Description

This class is used to represent any cylindrical PET scanner.

Inherits from vScanner

Definition at line 43 of file iScannerPET.hh.

Constructor & Destructor Documentation

iScannerPET::iScannerPET ( )

iScannerPET constructor. Initialize the member variables to their default values.

Definition at line 40 of file iScannerPET.cc.

iScannerPET::~iScannerPET ( )

iScannerPET destructor.

Definition at line 71 of file iScannerPET.cc.

Member Function Documentation

int iScannerPET::BuildLUT ( bool a_scannerFileIsLUT )

virtual

Call the functions to generate the LUT or read the user-made LUT depending on the user choice.

Parameters

a_scannerFileIsLUT : boolean indicating if the file describing the SPECT camera is a generic file (0) or custom Look-up-table (1)

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 269 of file iScannerPET.cc.

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int iScannerPET::CheckParameters ( )

virtual

Check if all parameters have been correctly initialized.

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 307 of file iScannerPET.cc.

int iScannerPET::ComputeLUT ( )

privatevirtual

Compute the LUT of the scanner from a generic (.geom) file.

Read mandatory data from the geom file. Then compute the LUT elements for each crystal from the geometry described in the file

Compute the look-up-tables of the system containing the locations of the scanner elements center in space and their orientations

Reimplemented from vScanner.

Definition at line 501 of file iScannerPET.cc.

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void iScannerPET::DescribeSpecific ( )

virtual

Implementation of the pure virtual eponym function that simply prints info about the scanner.

Implements vScanner.

Definition at line 100 of file iScannerPET.cc.

FLTNB iScannerPET::GetDetectionElementSizeAxial ( )

inlinevirtual

Returns: return the axial size of the detection element

Implements vScanner.

Definition at line 242 of file iScannerPET.hh.

FLTNB iScannerPET::GetDetectionElementSizeTrans ( )

inlinevirtual

Returns: return the transaxial size of the detection element

Implements vScanner.

Definition at line 235 of file iScannerPET.hh.

int iScannerPET::GetEdgesCenterPositions	(	int	a_index1,
		int	a_index2,
		FLTNB	ap_pos_line_point1[3],
		FLTNB	ap_pos_line_point2[3],
		FLTNB	ap_pos_point1_x[4],
		FLTNB	ap_pos_point1_y[4],
		FLTNB	ap_pos_point1_z[4],
		FLTNB	ap_pos_point2_x[4],
		FLTNB	ap_pos_point2_y[4],
		FLTNB	ap_pos_point2_z[4]
	)

virtual

Implementation of the pure virtual function from vScanner.
Get the cartesian coordinaters of the center of the 4 edges of the detection elements.
It is typically used for the Distance Driven projector.

Parameters

int	a_index1 : 1st index of the event
int	a_index2 : 2nd index of the event
FLTNB	ap_pos_line_point1[3] : current position of point 1 of the ray (supposed to be centered in the section of the detection element and at the desired depth of interaction)
FLTNB	ap_pos_line_point2[3] : current position of point 1 of the ray (supposed to be centered in the section of the detection element and at the desired depth of interaction)
FLTNB	ap_pos_point1_x[4] : the resulting X position of the 4 edges of point 1
FLTNB	ap_pos_point1_y[4] : the resulting Y position of the 4 edges of point 1
FLTNB	ap_pos_point1_z[4] : the resulting Z position of the 4 edges of point 1
FLTNB	ap_pos_point2_x[4] : the resulting X position of the 4 edges of point 1
FLTNB	ap_pos_point2_y[4] : the resulting Y position of the 4 edges of point 1
FLTNB	ap_pos_point2_z[4] : the resulting Z position of the 4 edges of point 1

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 1345 of file iScannerPET.cc.

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int iScannerPET::GetGeometricInfoFromDataFile ( string a_pathToDataFilename )

virtual

Retrieve PET geometric informations from the datafile.

Recover the (axial) max ring difference

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 1491 of file iScannerPET.cc.

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int iScannerPET::GetLayer ( int a_idx )

private

Get the layer from which the 'a_index' crystal belongs to.

Parameters

a_idx : index of the crystal in the loaded LUT

Returns: layer index

Definition at line 1420 of file iScannerPET.cc.

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int iScannerPET::GetPositionsAndOrientations	(	int	a_index1,
		int	a_index2,
		FLTNB	ap_Position1[3],
		FLTNB	ap_Position2[3],
		FLTNB	ap_Orientation1[3],
		FLTNB	ap_Orientation2[3],
		FLTNB *	ap_POI1 = `NULL`,
		FLTNB *	ap_POI2 = `NULL`
	)

virtual

Get the central positions and orientations of the scanner elements from their indices.

Parameters

a_index1	: index of the 1st crystal
a_index2	: index of the 2nd crystal
ap_Position1[3]	: x,y,z cartesian position of center of the 1st crystal
ap_Position2[3]	: x,y,z cartesian position of center of the 2nd crystal
ap_Orientation1[3]	: x,y,z components of the orientation vector related to the 1st crystal
ap_Orientation2[3]	: x,y,z components of the orientation vector related to the 2nd crystal
ap_POI1	: x,y,z components of the Point Of Interation related to the 1st crystal
ap_POI2	: x,y,z components of the Point Of Interation related to the 2nd crystal

This method is very general and is used by the vProjector. From these positions and orientations, other methods can be used by specific projectors to get specific positions. Position calculations include POI and mean depth of interaction

Implements vScanner.

Definition at line 1046 of file iScannerPET.cc.

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int iScannerPET::GetPositionWithRandomDepth	(	int	a_index1,
		int	a_index2,
		FLTNB	ap_Position1[3],
		FLTNB	ap_Position2[3]
	)

virtual

Get the positions and orientations of scanner elements from their indices, with a random depth.

Parameters

a_index1	: index of the 1st crystal
a_index2	: index of the 2nd crystal
ap_Position1[3]	: x,y,z cartesian position of the point related to the 1st index (see child function for more details)
ap_Position2[3]	: x,y,z cartesian position of the point related to the 2st index (see child function for more details)

Method for testing purposes. Does not include POI and mean depth of interaction

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 1272 of file iScannerPET.cc.

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int iScannerPET::GetRdmPositionsAndOrientations	(	int	a_index1,
		int	a_index2,
		FLTNB	ap_Position1[3],
		FLTNB	ap_Position2[3],
		FLTNB	ap_Orientation1[3],
		FLTNB	ap_Orientation2[3]
	)

virtual

Get random positions of the scanner elements and their orientations from their indices.

Parameters

a_index1	: index of the 1st crystal
a_index2	: index of the 2nd crystal
ap_Position1[3]	: x,y,z cartesian position of center of the 1st crystal
ap_Position2[3]	: x,y,z cartesian position of center of the 2nd crystal
ap_Orientation1[3]	: x,y,z components of the orientation vector related to the 1st crystal
ap_Orientation2[3]	: x,y,z components of the orientation vector related to the 2nd crystal

Find the scanner elements described by the two indexes passed in parameters.
Compute random positions inside the elements described by the indexes passed in parameters
Find the scanner elements described by the two indexes passed in parameters.
Write the corresponding random cartesian coordinates in the positions parameters.

Position calculations include POI and mean depth of interaction

Implements vScanner.

Definition at line 1163 of file iScannerPET.cc.

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int iScannerPET::GetSystemNbElts ( )

inlinevirtual

Returns: the number of crystals in the PET system

Implements vScanner.

Definition at line 192 of file iScannerPET.hh.

int iScannerPET::GetTwoCorners	(	int	a_index1,
		int	a_index2,
		FLTNB	ap_CornerInf1[3],
		FLTNB	ap_CornerSup1[3],
		FLTNB	ap_CornerInf2[3],
		FLTNB	ap_CornerSup2[3]
	)

virtual

Get the cartesian coordinaters of the two opposite corners of a scanner element.

Parameters

a_index1	: index of the 1st crystal
a_index2	: index of the 2nd crystal
ap_CornerInf1[3]
ap_CornerSup1[3]
ap_CornerInf2[3]
ap_CornerSup2[3]

Implements vScanner.

Definition at line 1317 of file iScannerPET.cc.

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int iScannerPET::Initialize ( )

virtual

Check general initialization and set several parameters to their default value.

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 386 of file iScannerPET.cc.

int iScannerPET::Instantiate ( bool a_scannerFileIsLUT )

virtual

Get mandatory informations from the scanner file and allocate memory for the member variables.

Parameters

a_scannerFileIsLUT : boolean indicating if the file describing the system is a generic file (0) or custom Look-up-table (1)

Returns: 0 if success, positive value otherwise

Implements vScanner.

Definition at line 145 of file iScannerPET.cc.

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int iScannerPET::IsAvailableLOR	(	int	a_elt1,
		int	a_elt2
	)

virtual

Check if the LOR formed by the crystalf whose indices are passed in parameters is available according to the scanner restrictions.

Parameters

a_elt1	: index of the 1st crystal
a_elt2	: index of the 2nd crystal

This function is dedicated to analytic projection and list-mode sensitivity image generation
The PET implementation checks the LOR availability according to the minimal (transaxial) angle difference and the maximal ring difference between two crystals

Reimplemented from vScanner.

Definition at line 193 of file iScannerPET.hh.

int iScannerPET::LoadLUT ( )

privatevirtual

Load a precomputed scanner LUT.

Read mandatory data from the header of the LUT.
Then load the LUT elements for each crystal

Returns: 0 if success, positive value otherwise

Reimplemented from vScanner.

Definition at line 421 of file iScannerPET.cc.

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int iScannerPET::PROJ_GetPETSpecificParameters ( FLTNB * ap_maxAxialDiffmm )

virtual

Set pointers passed in argument with the related PET specific variables This function is used to recover these values in the datafile object.

Parameters

ap_maxAxialDiffmm

Returns: 0 if success, positive value otherwise

Reimplemented from vScanner.

Definition at line 1521 of file iScannerPET.cc.

int iScannerPET::SetPETMaxAxialDiffmm ( FLTNB a_maxAxialDiffmm )

inlinevirtual

Set the maximal axial difference in mm between 2 crystals forming a lor.

Parameters

a_maxAxialDiffmm

This function is surcharged by the PET scanner daughter class
Returns an error by default.

Returns: 1 (error) if not surcharged by a daughter class

Reimplemented from vScanner.

Definition at line 222 of file iScannerPET.hh.

void iScannerPET::ShowHelp ( )

virtual

Display help.

Implements vScanner.

Definition at line 1547 of file iScannerPET.cc.

Member Data Documentation

FLTNB iScannerPET::m_maxAxialDiffmm

private

Maximal axial difference in mm for a specific acquisition

Definition at line 309 of file iScannerPET.hh.

FLTNB iScannerPET::m_minAngleDifference

private

Minimal transaxial angle difference for the system

Definition at line 307 of file iScannerPET.hh.

int iScannerPET::m_nbCrystals

private

Total number of crystal in the scanner

Definition at line 291 of file iScannerPET.hh.

int iScannerPET::m_nbLayers

private

Number of crystal layers in the scanner

Definition at line 290 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_crystalCentralPositionX

private

Cartesian coordinate on X-axis of the center of each crystal

Definition at line 294 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_crystalCentralPositionY

private

Cartesian coordinate on Y-axis of the center of each crystal

Definition at line 295 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_crystalCentralPositionZ

private

Cartesian coordinate on Z-axis of the center of each crystal

Definition at line 296 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_crystalOrientationX

private

X-axis orientation of each crystal

Definition at line 298 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_crystalOrientationY

private

Y-axis orientation of each crystal

Definition at line 299 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_crystalOrientationZ

private

Z-axis orientation of each crystal

Definition at line 300 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_meanDepthOfInteraction

private

Mean depth of interaction in a crystal (for each layer)

Definition at line 305 of file iScannerPET.hh.

int* iScannerPET::mp_nbCrystalsInLayer

private

Number of crystals (for each layer)

Definition at line 292 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_sizeCrystalAxial

private

Axial size of a crystal (for each layer)

Definition at line 303 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_sizeCrystalDepth

private

Depth of a crystal (for each layer)

Definition at line 304 of file iScannerPET.hh.

FLTNB* iScannerPET::mp_sizeCrystalTrans

private

Transaxial size of a crystal (for each layer)

Definition at line 302 of file iScannerPET.hh.

The documentation for this class was generated from the following files:

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation