Acquisition variable

Information about the acquisition itself is stored as attributes of the MIacquisition variable (again, no dimensions and no values).

MIprotocol

String description of the protocol for image acquisition.

MIscanning_sequence

String description of type of data taken (eg. for MR -- IR, SE, PS, etc.).

MIrepetition_time

Time in seconds between pulse sequences.

MIecho_time

Time in seconds between the middle of a 90 degree pulse and the middle of spin echo production.

MIinversion_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.

MInum_averages

Number of times a given pulse sequence is repeated before any parameter is changed.

MIimaging_frequency

Precession frequency in Hz of the imaged nucleus.

MIimaged_nucleus

String specifying the nucleus that is resonant at the imaging frequency.

MIradionuclide

String specifying the isotope administered.

MIcontrast_agent

String identifying the contrast or bolus agent.

MIradionuclide_halflife

Half-life of radionuclide in seconds.

MItracer

String identifying tracer labelled with radionuclide that was injected.

MIinjection_time

String giving time (and date) of injection.

MIinjection_year

Integer giving year of injection.

MIinjection_month

Integer giving month (1-12) of injection.

MIinjection_day

Integer giving day (1-31) of injection.

MIinjection_hour

Integer giving hour (0-23) of injection.

MIinjection_minute

Integer giving minute (0-59) of injection.

MIinjection_seconds

Floating-point value giving seconds of injection.

MIinjection_length

Length of time of injection (in seconds).

MIinjection_dose

Total dose of radionuclide or contrast agent injected (in units specified by MIdose_units).

MIdose_units

String giving units of dose.

MIinjection_volume

Volume of injection in mL.

MIinjection_route

String identifying administration route of injection.