A class to trick the Objective function that we have list mode data, when we only have cache. More...

#include "stir/listmode/ListModeData_dummy.h"

Inheritance diagram for stir::ListModeData_dummy:

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Public Member Functions
	ListModeData_dummy (shared_ptr< const ExamInfo > exam_info_sptr, shared_ptr< const ProjDataInfo > proj_data_info_sptr)

std::string	get_name () const override
	Returns the name of the list mode data.

Succeeded	reset () override
	Call this function if you want to re-start reading at the beginning.

SavedPosition	save_get_position () override
	Save the current reading position.

Succeeded	set_get_position (const SavedPosition &) override
	Set the position for reading to a previously saved point.

bool	has_delayeds () const override
	Return if the file stores delayed events as well (as opposed to prompts)

Public Member Functions inherited from stir::ListModeData
	ListModeData ()
	Default constructor.

	ListModeData (shared_ptr< const ExamInfo > exam_info_sptr, shared_ptr< const ProjDataInfo > proj_data_info_sptr)

shared_ptr< ListRecord >	get_empty_record_sptr () const
	Get a pointer to an empty record.

virtual Succeeded	get_next_record (ListRecord &event) const
	Gets the next record in the listmode sequence.

const Scanner &	get_scanner () const
	Get reference to scanner.

virtual unsigned long int	get_total_number_of_events () const
	Returns the total number of events in the listmode file.

Public Member Functions inherited from stir::ExamData
	ExamData ()
	ExamData.

	ExamData (const shared_ptr< const ExamInfo > &_this_exam)

virtual const ExamInfo &	get_exam_info () const

virtual shared_ptr< const ExamInfo >	get_exam_info_sptr () const
	Get shared pointer to exam info.

virtual void	set_exam_info (ExamInfo const &)
	change exam info

void	set_exam_info_sptr (shared_ptr< const ExamInfo > new_exam_info_sptr)

Public Member Functions inherited from stir::DataWithProjDataInfo
	DataWithProjDataInfo ()
	Default constructor sets internal member to 0.

	DataWithProjDataInfo (const shared_ptr< const ProjDataInfo > &proj_data_info_sptr_v)

virtual const ProjDataInfo &	get_proj_data_info () const

virtual shared_ptr< const ProjDataInfo >	get_proj_data_info_sptr () const
	Get shared pointer to ProjData info.

int	get_num_segments () const
	Get number of segments.

int	get_num_axial_poss (const int segment_num) const
	Get number of axial positions per segment.

int	get_num_views () const
	Get number of views.

int	get_num_tangential_poss () const
	Get number of tangential positions.

int	get_num_tof_poss () const
	Get number of TOF positions.

int	get_min_tof_pos_num () const
	Get the index of the first timing position.

int	get_max_tof_pos_num () const
	Get the index of the last timing position.

int	get_tof_mash_factor () const
	Get TOG mash factor.

int	get_min_segment_num () const
	Get minimum segment number.

int	get_max_segment_num () const
	Get maximum segment number.

int	get_min_axial_pos_num (const int segment_num) const
	Get mininum axial position per segmnet.

int	get_max_axial_pos_num (const int segment_num) const
	Get maximum axial position per segment.

int	get_min_view_num () const
	Get minimum view number.

int	get_max_view_num () const
	Get maximum view number.

int	get_min_tangential_pos_num () const
	Get minimum tangential position number.

int	get_max_tangential_pos_num () const
	Get maximum tangential position number.

Protected Member Functions
shared_ptr< ListRecord >	get_empty_record_helper_sptr () const override

Succeeded	get_next (ListRecord &event) const override

Protected Member Functions inherited from stir::ListModeData
virtual void	set_proj_data_info_sptr (shared_ptr< const ProjDataInfo >)

Additional Inherited Members
Public Types inherited from stir::ListModeData
typedef ListModeData	hierarchy_base_type
	typedef used by read_from_file

typedef unsigned int	SavedPosition
	Use this typedef for save/set_get_position.

Protected Attributes inherited from stir::ExamData
shared_ptr< const ExamInfo >	exam_info_sptr

Protected Attributes inherited from stir::DataWithProjDataInfo
shared_ptr< const ProjDataInfo >	proj_data_info_sptr

Detailed Description

A class to trick the Objective function that we have list mode data, when we only have cache.

Author: Nikos Efthimiou

This class was created only to hold an ExamInfo and be returned by ListModeData& get_input_data() during set_up() when calling STIR from SIRF.

This can happen when a private (not open-source) IO is required to read the listmode files. However, the owner of that library shared a cache (see PoissonLogLikelihoodWithLinearModelForMeanAndListModeData) listmode file with a third party.

Todo

Currently, it can only be used in combination with SIRF.

A possibility is to complete this as a class for cache files.

!

Member Function Documentation

◆ get_name()

std::string stir::ListModeData_dummy::get_name ( ) const

inlineoverridevirtual

Returns the name of the list mode data.

This name is not necessarily unique, and might be empty. However, it is expected (but not guaranteed) that ListModeData::read_from_file(lm_data_ptr->get_name()) would read the same list mode data.

The reason this cannot be guaranteed is largely in case the list mode data is not really on disk, but the object corresponds for instance to a Monte Carlo simulator.

Implements stir::ListModeData.

◆ reset()

Succeeded stir::ListModeData_dummy::reset ( )

inlineoverridevirtual

Call this function if you want to re-start reading at the beginning.

Implements stir::ListModeData.

References stir::error().

◆ save_get_position()

SavedPosition stir::ListModeData_dummy::save_get_position ( )

inlineoverridevirtual

Save the current reading position.

Note that the return value is not related to the number of events already read. In particular, you cannot do any arithmetic on it to skip a few events. This is different from e.g. std::streampos.

Warning: There is a maximum number of times this function can be called. This is determined by the SavedPosition type. Once you save more positions, the first positions will be overwritten. There is currently no way of finding out after how many times this will happen (but it's a large number...).; These saved positions are only valid for the lifetime of the ListModeData object.; A derived class might disable this facility. It will/should then always return Succeeded::no when calling set_get_position().

Implements stir::ListModeData.

References stir::error().