CASToR  2.0
Tomographic Reconstruction (PET/SPECT/CT)
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vScanner Class Referenceabstract

Generic class for scanner objects. More...

#include <vScanner.hh>

Inheritance diagram for vScanner:
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Public Member Functions

 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...
 
virtual void DescribeSpecific ()=0
 A pure virtual function used to describe the specific parts of the scanner. More...
 
virtual int Instantiate (bool a_scannerFileIsLUT)=0
 This function is implemented in child classes. Read the mandatory fields from the scanner file and allocate memory for the member variables. More...
 
virtual int BuildLUT (bool a_scannerFileIsLUT)=0
 This function is implemented in child classes.
Instantiate the scanner look-up-table (LUT) More...
 
virtual int CheckParameters ()=0
 This function is implemented in child classes.
Check that all parameters have been correctly initialized. More...
 
virtual int Initialize ()=0
 This function is implemented in child classes.
Check initialization and set several parameters to their default value. More...
 
virtual 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)=0
 This is a pure virtual method that must be implemented by children.
Get the central positions and orientations of the scanner elements from their indices. More...
 
virtual int GetRdmPositionsAndOrientations (int a_index1, int a_index2, FLTNB ap_Position1[3], FLTNB ap_Position2[3], FLTNB ap_Orientation1[3], FLTNB ap_Orientation2[3])=0
 This is a pure virtual method that must be implemented by children.
Get random positions of the scanner elements and their orientations from their indices. More...
 
virtual int GetPositionWithRandomDepth (int a_index1, int a_index2, FLTNB ap_Position1[3], FLTNB ap_Position2[3])=0
 This is a pure virtual method that must be implemented by children.
Get the positions of scanner elements from their indices, with a random depth. More...
 
virtual int GetTwoCorners (int a_index1, int a_index2, FLTNB ap_CornerInf1[3], FLTNB ap_CornerSup1[3], FLTNB ap_CornerInf2[3], FLTNB ap_CornerSup2[3])=0
 This is a pure virtual method that must be implemented by children.
Get the cartesian coordinaters of the two opposite corners of a scanner element. More...
 
virtual 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])=0
 This is a pure virtual method that must be implemented by children.
Get the cartesian coordinaters of the center of the 4 edges of the detection element.
It is typically used for the Distance Driven projector. More...
 
virtual int ComputeLUT ()
 Virtual function which should be implemented by the child classes.
It computes the LUT of the scanner from a generic (.geom) file.
The vScanner implementation throws error by default as it should be implemented by the child class. More...
 
virtual int LoadLUT ()
 Virtual function which should be implemented by the child classes.
Load a precomputed scanner LUT.
The vScanner implementation throws error by default as it should be implemented by the child class. More...
 
virtual int GetSystemNbElts ()=0
 This is a pure virtual method that must be implemented by children. More...
 
virtual int IsAvailableLOR (int a_elt1, int a_elt2)
 This function is implemented in child classes.
Check if the LOR is available according to the scanner restrictions. More...
 
virtual void ShowHelp ()=0
 This function is implemented in child classes
Display help specific to the scanner class. More...
 
virtual int GetGeometricInfoFromDataFile (string a_path)=0
 This function is implemented in child classes
Recover geometric informations specific to the scanner class from the datafile header. 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 FLTNB GetDetectionElementSizeTrans ()=0
 
virtual FLTNB GetDetectionElementSizeAxial ()=0
 
virtual int SetPETMaxAxialDiffmm (FLTNB a_maxAxialDiffmm)
 Set the maximal axial difference in mm between 2 crystals forming a lor. More...
 
virtual int SetRotDirection (string a_rotDirection)
 Set rotation direction of the system. More...
 
virtual int PROJ_GetPETSpecificParameters (FLTNB *ap_maxRingDiff)
 Get geometric PET specific parameters to initialize the datafile. 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...
 

Protected Attributes

int m_scannerType
 
int m_verbose
 
oImageDimensionsAndQuantificationmp_ID
 
bool m_allParametersChecked
 
oMatrixmp_rotationMatrix
 
oMatrixmp_positionMatrix_ref
 
oMatrixmp_positionMatrix_out
 
int m_rotDirection
 
FLTNB m_defaultBedDisplacementInMm
 

Detailed Description

Generic class for scanner objects.

This class is designed to be a mother virtual class that should not be used on its own; only its children are used.
It has a pure virtual function that is used to get the cartesian coordinates of any line described by two indices.
Although new scanner classes are not supposed to be added, it uses the same auto-declaration class system than other reconstruction classes for the initialization of its children.

Definition at line 62 of file vScanner.hh.

Constructor & Destructor Documentation

vScanner::vScanner ( )

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

Definition at line 39 of file vScanner.cc.

vScanner::~vScanner ( )
virtual

vScanner destructor.

Definition at line 58 of file vScanner.cc.

Member Function Documentation

int vScanner::BuildLUT ( bool  a_scannerFileIsLUT)
pure virtual

This function is implemented in child classes.
Instantiate the scanner look-up-table (LUT)

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

Implemented in iScannerCT, iScannerSPECTConv, and iScannerPET.

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int vScanner::CheckParameters ( )
pure virtual

This function is implemented in child classes.
Check that all parameters have been correctly initialized.

Returns
0 if success, positive value otherwise

Implemented in iScannerCT, iScannerSPECTConv, and iScannerPET.

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int vScanner::ComputeLUT ( )
virtual

Virtual function which should be implemented by the child classes.
It computes the LUT of the scanner from a generic (.geom) file.
The vScanner implementation throws error by default as it should be implemented by the child class.

Reimplemented in iScannerSPECTConv, iScannerPET, and iScannerCT.

Definition at line 136 of file vScanner.cc.

void vScanner::Describe ( )

A function used to describe the generic parts of the datafile.

Definition at line 76 of file vScanner.cc.

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vScanner::DescribeSpecific ( )
pure virtual

A pure virtual function used to describe the specific parts of the scanner.

Implemented in iScannerCT, iScannerSPECTConv, and iScannerPET.

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int vScanner::GetCTSpecificParameters ( uint16_t *  ap_nbOfProjections,
FLTNB *&  ap_angles,
int *  ap_detectorRotDirection 
)
virtual

Recover geometric CT specific parameters from the scanner to initialize the datafile.

Parameters
ap_nbOfProjections
ap_angles
ap_detectorRotDirection

This function is surcharged by the CT scanner daughter classes
Returns an error by default.

Returns
1 (error) if not overloaded by a daughter class

Reimplemented in iScannerCT.

Definition at line 268 of file vScanner.cc.

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FLTNB vScanner::GetDefaultBedDisplacementInMm ( )
inline
Returns
the default bed displacement between two successive bed positions

Definition at line 289 of file vScanner.hh.

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FLTNB vScanner::GetDetectionElementSizeAxial ( )
inlinepure virtual
Returns
return the axial size of the detection element, function implemented by children

Implemented in iScannerPET, iScannerSPECTConv, and iScannerCT.

FLTNB vScanner::GetDetectionElementSizeTrans ( )
inlinepure virtual
Returns
return the transaxial size of the detection element, function implemented by children

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

int vScanner::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] 
)
pure virtual

This is a pure virtual method that must be implemented by children.
Get the cartesian coordinaters of the center of the 4 edges of the detection element.
It is typically used for the Distance Driven projector.

Parameters
inta_index1 : 1st index of the event
inta_index2 : 2nd index of the event
FLTNBap_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)
FLTNBap_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)
FLTNBap_pos_point1_x[4] : the resulting X position of the 4 edges of point 1
FLTNBap_pos_point1_y[4] : the resulting Y position of the 4 edges of point 1
FLTNBap_pos_point1_z[4] : the resulting Z position of the 4 edges of point 1
FLTNBap_pos_point2_x[4] : the resulting X position of the 4 edges of point 1
FLTNBap_pos_point2_y[4] : the resulting Y position of the 4 edges of point 1
FLTNBap_pos_point2_z[4] : the resulting Z position of the 4 edges of point 1
Returns
0 if success, positive value otherwise

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

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int vScanner::GetGeometricInfoFromDataFile ( string  a_path)
pure virtual

This function is implemented in child classes
Recover geometric informations specific to the scanner class from the datafile header.

Parameters
a_path: string containing the path to datafile header
Returns
0 if success. Positive value otherwise

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

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int vScanner::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 
)
pure virtual

This is a pure virtual method that must be implemented by children.
Get the central positions and orientations of the scanner elements from their indices.

Parameters
a_index1: 1st index of the event
a_index2: 2nd index of the event
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)
ap_Orientation1[3]: x,y,z components of the orientation vector related to the 1st index (see child function for more details)
ap_Orientation2[3]: x,y,z components of the orientation vector related to the 2nd index (see child function for more details)
ap_POI1: x,y,z components of the Point Of Interation related to the 1st index (see child function for more details)
ap_POI2: x,y,z components of the Point Of Interation related to the 2nd index (see child function for more details)
Returns
0 if success, positive value otherwise

Implemented in iScannerCT, iScannerPET, and iScannerSPECTConv.

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int vScanner::GetPositionWithRandomDepth ( int  a_index1,
int  a_index2,
FLTNB  ap_Position1[3],
FLTNB  ap_Position2[3] 
)
pure virtual

This is a pure virtual method that must be implemented by children.
Get the positions of scanner elements from their indices, with a random depth.

Parameters
a_index1: 1st index of the event
a_index2: 2nd index of the event
ap_Position1[3]: x,y,z cartesian position of the point related to the 1st event (see child function for more details)
ap_Position2[3]: x,y,z cartesian position of the point related to the 2st event (see child function for more details)
Returns
0 if success, positive value otherwise

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

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

This is a pure virtual method that must be implemented by children.
Get random positions of the scanner elements and their orientations from their indices.

Parameters
a_index1: 1st index of the event
a_index2: 2nd index of the event
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)
ap_Orientation1[3]: x,y,z components of the orientation vector related to the 1st index (see child function for more details)
ap_Orientation2[3]: x,y,z components of the orientation vector related to the 2nd index (see child function for more details)
Returns
0 if success, positive value otherwise

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

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int vScanner::GetScannerType ( )
inline
Returns
the type (modality) of the system as defined by macro SCANNER_TYPE in sScannerManager.hh

Definition at line 263 of file vScanner.hh.

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string vScanner::GetScannerTypeString ( )
inline
Returns
the string corresponding to the scanner type (modality) as defined by macro SCANNER_TYPE in sScannerManager.hh

Definition at line 101 of file vScanner.cc.

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int vScanner::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 
)
virtual

Recover geometric SPECT specific parameters from the scanner to initialize the datafile.

Parameters
ap_nbOfProjections
ap_nbHeads
ap_acquisitionZoom
ap_nbOfBins
ap_pixSizeXY
ap_angles
ap_CORtoDetectorDistance
ap_headRotDirection

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 238 of file vScanner.cc.

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int vScanner::GetSystemNbElts ( )
pure virtual

This is a pure virtual method that must be implemented by children.

Returns
the number of elements in the system

Implemented in iScannerCT, iScannerSPECTConv, and iScannerPET.

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

This is a pure virtual method that must be implemented by children.
Get the cartesian coordinaters of the two opposite corners of a scanner element.

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

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

int vScanner::Initialize ( )
pure virtual

This function is implemented in child classes.
Check initialization and set several parameters to their default value.

Returns
0 if success, positive value otherwise

Implemented in iScannerCT, iScannerSPECTConv, and iScannerPET.

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int vScanner::Instantiate ( bool  a_scannerFileIsLUT)
pure virtual

This function is implemented in child classes. Read the mandatory fields 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

Implemented in iScannerCT, iScannerSPECTConv, and iScannerPET.

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int vScanner::IsAvailableLOR ( int  a_elt1,
int  a_elt2 
)
virtual

This function is implemented in child classes.
Check if the LOR is available according to the scanner restrictions.

Parameters
a_elt1: index of the 1st scanner element
a_elt2: index of the 2nd scanner element

This function is related to analytic projection and list-mode sensitivity image generation

Returns
1 if the LOR is available, 0 otherwise

Reimplemented in iScannerSPECTConv, and iScannerPET.

Definition at line 181 of file vScanner.cc.

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int vScanner::LoadLUT ( )
virtual

Virtual function which should be implemented by the child classes.
Load a precomputed scanner LUT.
The vScanner implementation throws error by default as it should be implemented by the child class.

Reimplemented in iScannerSPECTConv, iScannerPET, and iScannerCT.

Definition at line 159 of file vScanner.cc.

int vScanner::PROJ_GetPETSpecificParameters ( FLTNB ap_maxRingDiff)
virtual

Get geometric PET specific parameters to initialize the datafile.

Parameters
ap_maxRingDiff

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

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

Reimplemented in iScannerPET.

Definition at line 224 of file vScanner.cc.

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uint16_t vScanner::PROJ_GetSPECTNbPixels ( )
virtual

return the total number of pixels for a SPECT reconstruction

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 432 of file vScanner.cc.

uint16_t vScanner::PROJ_GetSPECTNbProjections ( )
virtual

return the total number of projections for a SPECT acquisition

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 412 of file vScanner.cc.

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int vScanner::PROJ_SetSPECTAngles ( FLTNB ap_projectionAngles)
virtual

Set SPECT projection angles.

Parameters
ap_projectionAngles

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 371 of file vScanner.cc.

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int vScanner::PROJ_SetSPECTCORtoDetectorDistance ( FLTNB  a_CORtoDetectorDistance)
virtual

Set distance between center of rotation and SPECT detectors.

Parameters
a_CORtoDetectorDistance

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 392 of file vScanner.cc.

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int vScanner::PROJ_SetSPECTNbBins ( uint16_t *  ap_nbOfBins)
virtual

Set SPECT number of Bins.

Parameters
ap_nbOfBins

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 326 of file vScanner.cc.

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int vScanner::PROJ_SetSPECTNbProjections ( uint32_t  a_nbOfProjections)
virtual

Set SPECT number of views.

Parameters
a_nbOfProjections

This function is surcharged by the SPECT scanner daughter classes
Returns an error by default.

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

Reimplemented in iScannerSPECTConv.

Definition at line 347 of file vScanner.cc.

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void vScanner::SetImageDimensionsAndQuantification ( oImageDimensionsAndQuantification ap_ID)
inline

Set the pointer to the image dimensions and quantification object.

Parameters
oImageDimensionsAndQuantification*ap_ID

Definition at line 283 of file vScanner.hh.

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int vScanner::SetPETMaxAxialDiffmm ( FLTNB  a_maxAxialDiffmm)
virtual

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 in iScannerPET.

Definition at line 203 of file vScanner.cc.

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int vScanner::SetRotDirection ( string  a_rotDirection)
virtual

Set rotation direction of the system.

Parameters
a_rotDirection

Set rotation direction of the scanner elements (head for SPECT, rsector/modules for PET) for the generation of the geometry

Returns
0 if success, positive value otherwise (unknown key)

Definition at line 290 of file vScanner.cc.

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void vScanner::SetVerbose ( int  a_verboseLevel)
inline

Set verbosity.

Parameters
a_verboseLevel

Definition at line 276 of file vScanner.hh.

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void vScanner::ShowHelp ( )
pure virtual

This function is implemented in child classes
Display help specific to the scanner class.

Implemented in iScannerPET, iScannerCT, and iScannerSPECTConv.

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Member Data Documentation

bool vScanner::m_allParametersChecked
protected

Boolean indicating if all variables of the class have been checked. Default =false

Definition at line 440 of file vScanner.hh.

FLTNB vScanner::m_defaultBedDisplacementInMm
protected

The default displacement of the scanner between two successive bed positions. Default = 0.

Definition at line 445 of file vScanner.hh.

int vScanner::m_rotDirection
protected

Rotation Direction for the generation of the geometry (clockwise by default)

Definition at line 444 of file vScanner.hh.

int vScanner::m_scannerType
protected

System type. Default =-1 (unknown)

Definition at line 437 of file vScanner.hh.

int vScanner::m_verbose
protected

Verbosity. Default =-1

Definition at line 438 of file vScanner.hh.

oImageDimensionsAndQuantification* vScanner::mp_ID
protected

Image dimensions and quantification object

Definition at line 439 of file vScanner.hh.

oMatrix* vScanner::mp_positionMatrix_out
protected

Matrix strucure for rotation computations

Definition at line 443 of file vScanner.hh.

oMatrix* vScanner::mp_positionMatrix_ref
protected

Matrix strucure for rotation computations

Definition at line 442 of file vScanner.hh.

oMatrix* vScanner::mp_rotationMatrix
protected

Matrix strucure for rotation computations

Definition at line 441 of file vScanner.hh.


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