OutputSequenceData Class Reference

Maintain libraries of hardware events and write sequence file. More...

#include <OutputSequenceData.h>

Classes
struct	CompressedShape
	Compressed shape object. More...

Public Member Functions
	OutputSequenceData ()
	Default constructor.
	~OutputSequenceData ()
	Default destructor.
void	AddEvents (std::vector< Event * > &events, double duration=0.0)
	Add events to a new sequence block.
void	SetRotationMatrix (double alpha, double theta, double phi)
	Set rotation matrix.
void	SetDefinitions (std::map< std::string, std::string > &defs)
	Set custom scan definitions.
void	WriteFiles (const std::string &outDir, const std::string &outFile)
	Write the sequence data to file.
template<typename T >
int	SearchLibrary (vector< T > &library, T &obj)

Private Member Functions
template<typename T >
int	SearchLibrary (std::vector< T > &library, T &obj)
	Search library for match.
void	CompressShape (std::vector< double > &shape, CompressedShape *out)
	Compress a shape.

Private Attributes
double	m_rot_matrix [3][3]
	Rotation matrix.
double	m_duration
	Total duration of sequence blocks.
std::map< std::string, std::string >	m_definitions
	Custom definitions for user-specific purposes to be output in file.
std::vector< SeqBlock >	m_blocks
	List of sequence blocks.
std::vector< DelayEvent >	m_delay_library
	Library of delay events.
std::vector< RFEvent >	m_rf_library
	Library of RF events.
std::vector< GradEvent >	m_grad_library
	Library of gradient events.
std::vector< ADCEvent >	m_adc_library
	Library of ADC events.
std::vector< CompressedShape >	m_shape_library
	Library of compressed shapes (referenced by events)

Detailed Description

Maintain libraries of hardware events and write sequence file.

This class maintains a list of compressed sequence events suitable for execution on hardware. A sequence file can be generated for execution on real MR hardware according to the open file format as part of the Pulseq project (http://pulseq.github.io).

The hierarchical sequence description contains the following elements:

• Blocks: A list of event IDs.
• Events: Hardware events (dependent on type: ADC, RF, gradient etc). These may refer to one or more basic shapes.
• Shapes: Compressed list of samples. This can describe for example, RF amplitude or gradient waveforms.

This hierarchy is maintained automatically by the class. The calling code simply adds uncompressed hardware events.

See also

AddEvents(), WriteFiles()

Member Function Documentation

AddEvents()

void OutputSequenceData::AddEvents	(	std::vector< Event * > &	events,
		double	duration = 0.0 )

Add events to a new sequence block.

Creates a new block based on the vector of event pointers. The event data is copied by this function, so pointers can safely be deleted afterwards.

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SetRotationMatrix()

void OutputSequenceData::SetRotationMatrix	(	double	alpha,
		double	theta,
		double	phi )

Set rotation matrix.

Calculate the rotation matrix from the axis/angle representation used internally.

Parameters

alpha	Rotation angle
theta	Inclination from z-axis
phi	Azimutal phase from x-axis

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

• /Users/stoeckert/DZNE/workspace/jemris/src/OutputSequenceData.h
• /Users/stoeckert/DZNE/workspace/jemris/src/OutputSequenceData.cpp