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These attributes store parameters about the acquisition. All of these
attributes are optional, and have no default value defined.
- protocol - String description of the protocol for image
acquisition.
- scanning_sequence - String description of type of data
taken (eg. for MR - IR, SE, PS, etc.).
- repetition_time - Number giving the time in seconds between pulse sequences.
- echo_time - Number giving the time in seconds between the
middle of a 90 degree pulse and the middle of spin echo production.
- inversion_time - Time in seconds after the middle of the
inverting RF pulse to the middle of the 90 degree pulse to detect the
amount of longitudinal magnetization.
- num_averages - Number of times a given pulse sequence is
repeated before any parameter is changed.
- imaging_frequency - Precession frequency in Hz of the
imaged nucleus.
- imaged_nucleus - String specifying the nucleus that is
resonant at the imaging frequency.
- radionuclide - String specifying the isotope administered.
- contrast_agent - String identifying the contrast or bolus agent.
- radionuclide_halflife Half-life of radionuclide in
seconds.
- tracer - String identifying tracer labeled with radionuclide
that was injected.
- injection_time - String giving time (and date) of injection.
- injection_year - Integer giving year of injection.
- injection_month - Integer giving month (1-12) of injection.
- injection_day - Integer giving day (1-31) of injection.
- injection_hour - Integer giving hour (0-23) of injection.
- injection_minute Integer giving minute (0-59) of injection.
- injection_seconds - Floating-point number giving seconds of
injection.
- injection_length - Number giving the time duration of the
injection (in seconds).
- injection_dose - Total dose of radionuclide or contrast
agent injected (in units specified by dose_units).
- dose_units - String giving units of dose.
- injection_volume - Number giving the volume of injection
in milliliters.
- injection_route - String identifying administration route of
injection.
Next: Dimension variable attributes
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Robert VINCENT
2004-05-28