Also, here is the BIDS validator output (broken up into two posts):
[WARNING] SIDECAR_KEY_RECOMMENDED A data file's JSON sidecar is missing a key listed as recommended.
Description
/CHANGES - Field description: Free-form natural language description.
/README - Field description: Free-form natural language description.
3894 more files with the same issue
DeviceSerialNumber
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The serial number of the equipment that produced the measurements.
A pseudonym can also be used to prevent the equipment from being
identifiable, so long as each pseudonym is unique within the dataset.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The serial number of the equipment that produced the measurements.
A pseudonym can also be used to prevent the equipment from being
identifiable, so long as each pseudonym is unique within the dataset.
2910 more files with the same issue
StationName
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Institution defined name of the machine that produced the measurements.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Institution defined name of the machine that produced the measurements.
2910 more files with the same issue
SoftwareVersions
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Manufacturer's designation of software version of the equipment that produced
the measurements.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Manufacturer's designation of software version of the equipment that produced
the measurements.
2910 more files with the same issue
ReceiveCoilName
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Information describing the receiver coil.
Corresponds to DICOM Tag 0018, 1250 `Receive Coil Name`,
although not all vendors populate that DICOM Tag,
in which case this field can be derived from an appropriate
private DICOM field.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Information describing the receiver coil.
Corresponds to DICOM Tag 0018, 1250 `Receive Coil Name`,
although not all vendors populate that DICOM Tag,
in which case this field can be derived from an appropriate
private DICOM field.
2132 more files with the same issue
ReceiveCoilActiveElements
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Information describing the active/selected elements of the receiver coil.
This does not correspond to a tag in the DICOM ontology.
The vendor-defined terminology for active coil elements can go in this field.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Information describing the active/selected elements of the receiver coil.
This does not correspond to a tag in the DICOM ontology.
The vendor-defined terminology for active coil elements can go in this field.
2910 more files with the same issue
GradientSetType
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: It should be possible to infer the gradient coil from the scanner model.
If not, for example because of a custom upgrade or use of a gradient
insert set, then the specifications of the actual gradient coil should be
reported independently.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: It should be possible to infer the gradient coil from the scanner model.
If not, for example because of a custom upgrade or use of a gradient
insert set, then the specifications of the actual gradient coil should be
reported independently.
2910 more files with the same issue
MRTransmitCoilSequence
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: This is a relevant field if a non-standard transmit coil is used.
Corresponds to DICOM Tag 0018, 9049 `MR Transmit Coil Sequence`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: This is a relevant field if a non-standard transmit coil is used.
Corresponds to DICOM Tag 0018, 9049 `MR Transmit Coil Sequence`.
2910 more files with the same issue
MatrixCoilMode
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: (If used)
A method for reducing the number of independent channels by combining in
analog the signals from multiple coil elements.
There are typically different default modes when using un-accelerated or
accelerated (for example, `"GRAPPA"`, `"SENSE"`) imaging.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: (If used)
A method for reducing the number of independent channels by combining in
analog the signals from multiple coil elements.
There are typically different default modes when using un-accelerated or
accelerated (for example, `"GRAPPA"`, `"SENSE"`) imaging.
2910 more files with the same issue
CoilCombinationMethod
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Almost all fMRI studies using phased-array coils use root-sum-of-squares
(rSOS) combination, but other methods exist.
The image reconstruction is changed by the coil combination method
(as for the matrix coil mode above),
so anything non-standard should be reported.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Almost all fMRI studies using phased-array coils use root-sum-of-squares
(rSOS) combination, but other methods exist.
The image reconstruction is changed by the coil combination method
(as for the matrix coil mode above),
so anything non-standard should be reported.
2910 more files with the same issue
PulseSequenceType
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: A general description of the pulse sequence used for the scan.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: A general description of the pulse sequence used for the scan.
2132 more files with the same issue
ScanningSequence
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Description of the type of data acquired.
Corresponds to DICOM Tag 0018, 0020 `Scanning Sequence`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Description of the type of data acquired.
Corresponds to DICOM Tag 0018, 0020 `Scanning Sequence`.
2910 more files with the same issue
SequenceVariant
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Variant of the ScanningSequence.
Corresponds to DICOM Tag 0018, 0021 `Sequence Variant`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Variant of the ScanningSequence.
Corresponds to DICOM Tag 0018, 0021 `Sequence Variant`.
2910 more files with the same issue
ScanOptions
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Parameters of ScanningSequence.
Corresponds to DICOM Tag 0018, 0022 `Scan Options`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Parameters of ScanningSequence.
Corresponds to DICOM Tag 0018, 0022 `Scan Options`.
2910 more files with the same issue
SequenceName
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Manufacturer's designation of the sequence name.
Corresponds to DICOM Tag 0018, 0024 `Sequence Name`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Manufacturer's designation of the sequence name.
Corresponds to DICOM Tag 0018, 0024 `Sequence Name`.
2910 more files with the same issue
PulseSequenceDetails
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Information beyond pulse sequence type that identifies the specific pulse
sequence used (for example,
`"Standard Siemens Sequence distributed with the VB17 software"`,
`"Siemens WIP ### version #.##,"` or
`"Sequence written by X using a version compiled on MM/DD/YYYY"`).
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Information beyond pulse sequence type that identifies the specific pulse
sequence used (for example,
`"Standard Siemens Sequence distributed with the VB17 software"`,
`"Siemens WIP ### version #.##,"` or
`"Sequence written by X using a version compiled on MM/DD/YYYY"`).
2910 more files with the same issue
MTState
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Boolean stating whether the magnetization transfer pulse is applied.
Corresponds to DICOM Tag 0018, 9020 `Magnetization Transfer`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Boolean stating whether the magnetization transfer pulse is applied.
Corresponds to DICOM Tag 0018, 9020 `Magnetization Transfer`.
2910 more files with the same issue
SpoilingState
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Boolean stating whether the pulse sequence uses any type of spoiling
strategy to suppress residual transverse magnetization.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Boolean stating whether the pulse sequence uses any type of spoiling
strategy to suppress residual transverse magnetization.
2910 more files with the same issue
NumberShots
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The number of RF excitations needed to reconstruct a slice or volume
(may be referred to as partition).
Please mind that this is not the same as Echo Train Length which denotes the
number of k-space lines collected after excitation in a multi-echo readout.
The data type array is applicable for specifying this parameter before and
after the k-space center is sampled.
Please see
[`"NumberShots"` metadata field]\
(SPEC_ROOT/appendices/qmri.md#numbershots-metadata-field)
in the qMRI appendix for corresponding calculations.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The number of RF excitations needed to reconstruct a slice or volume
(may be referred to as partition).
Please mind that this is not the same as Echo Train Length which denotes the
number of k-space lines collected after excitation in a multi-echo readout.
The data type array is applicable for specifying this parameter before and
after the k-space center is sampled.
Please see
[`"NumberShots"` metadata field]\
(SPEC_ROOT/appendices/qmri.md#numbershots-metadata-field)
in the qMRI appendix for corresponding calculations.
2910 more files with the same issue
ParallelReductionFactorInPlane
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The parallel imaging (for instance, GRAPPA) factor in plane.
Use the denominator of the fraction of k-space encoded for each slice.
For example, 2 means half of k-space is encoded.
Corresponds to DICOM Tag 0018, 9069 `Parallel Reduction Factor In-plane`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The parallel imaging (for instance, GRAPPA) factor in plane.
Use the denominator of the fraction of k-space encoded for each slice.
For example, 2 means half of k-space is encoded.
Corresponds to DICOM Tag 0018, 9069 `Parallel Reduction Factor In-plane`.
2910 more files with the same issue
ParallelReductionFactorOutOfPlane
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The parallel imaging (for instance, GRAPPA) factor in the second phase encoding dimension of 3D sequences.
Use the denominator of the fraction of k-space encoded in the second phase encoding dimension.
For example, 2 means half of k-space is encoded.
Will typically be 1 for 2D sequences, as each slice in a 2D acquisition is usually fully encoded.
`ParallelReductionFactorOutOfPlane` should not be confused with `MultibandAccelerationFactor`,
as they imply different methods of accelerating the acquisition.
Corresponds to DICOM Tag 0018, 9155 `Parallel Reduction Factor out-of-plane`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The parallel imaging (for instance, GRAPPA) factor in the second phase encoding dimension of 3D sequences.
Use the denominator of the fraction of k-space encoded in the second phase encoding dimension.
For example, 2 means half of k-space is encoded.
Will typically be 1 for 2D sequences, as each slice in a 2D acquisition is usually fully encoded.
`ParallelReductionFactorOutOfPlane` should not be confused with `MultibandAccelerationFactor`,
as they imply different methods of accelerating the acquisition.
Corresponds to DICOM Tag 0018, 9155 `Parallel Reduction Factor out-of-plane`.
2910 more files with the same issue
ParallelAcquisitionTechnique
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The type of parallel imaging used (for example `"GRAPPA"`, `"SENSE"`).
Corresponds to DICOM Tag 0018, 9078 `Parallel Acquisition Technique`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The type of parallel imaging used (for example `"GRAPPA"`, `"SENSE"`).
Corresponds to DICOM Tag 0018, 9078 `Parallel Acquisition Technique`.
2910 more files with the same issue
PartialFourier
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The fraction of partial Fourier information collected.
Corresponds to DICOM Tag 0018, 9081 `Partial Fourier`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The fraction of partial Fourier information collected.
Corresponds to DICOM Tag 0018, 9081 `Partial Fourier`.
2132 more files with the same issue
PartialFourierDirection
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The direction where only partial Fourier information was collected.
Corresponds to DICOM Tag 0018, 9036 `Partial Fourier Direction`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The direction where only partial Fourier information was collected.
Corresponds to DICOM Tag 0018, 9036 `Partial Fourier Direction`.
2910 more files with the same issue
MixingTime
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: In the context of a stimulated- and spin-echo 3D EPI sequence for B1+ mapping
or a stimulated-echo MRS sequence,
corresponds to the interval between spin- and stimulated-echo pulses.
In the context of a diffusion-weighted double spin-echo sequence,
corresponds to the interval between two successive diffusion sensitizing
gradients, specified in seconds.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: In the context of a stimulated- and spin-echo 3D EPI sequence for B1+ mapping
or a stimulated-echo MRS sequence,
corresponds to the interval between spin- and stimulated-echo pulses.
In the context of a diffusion-weighted double spin-echo sequence,
corresponds to the interval between two successive diffusion sensitizing
gradients, specified in seconds.
2910 more files with the same issue
InversionTime
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The inversion time (TI) for the acquisition, specified in seconds.
Inversion time is the time after the middle of inverting RF pulse to middle
of excitation pulse to detect the amount of longitudinal magnetization.
Corresponds to DICOM Tag 0018, 0082 `Inversion Time`
(please note that the DICOM term is in milliseconds not seconds).
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The inversion time (TI) for the acquisition, specified in seconds.
Inversion time is the time after the middle of inverting RF pulse to middle
of excitation pulse to detect the amount of longitudinal magnetization.
Corresponds to DICOM Tag 0018, 0082 `Inversion Time`
(please note that the DICOM term is in milliseconds not seconds).
2910 more files with the same issue
DwellTime
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: Actual dwell time (in seconds) of the receiver per point in the readout
direction, including any oversampling.
For Siemens, this corresponds to DICOM field 0019, 1018 (in ns).
This value is necessary for the optional readout distortion correction of
anatomicals in the HCP Pipelines.
It also usefully provides a handle on the readout bandwidth,
which isn't captured in the other metadata tags.
Not to be confused with `"EffectiveEchoSpacing"`, and the frequent mislabeling
of echo spacing (which is spacing in the phase encoding direction) as
"dwell time" (which is spacing in the readout direction).
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: Actual dwell time (in seconds) of the receiver per point in the readout
direction, including any oversampling.
For Siemens, this corresponds to DICOM field 0019, 1018 (in ns).
This value is necessary for the optional readout distortion correction of
anatomicals in the HCP Pipelines.
It also usefully provides a handle on the readout bandwidth,
which isn't captured in the other metadata tags.
Not to be confused with `"EffectiveEchoSpacing"`, and the frequent mislabeling
of echo spacing (which is spacing in the phase encoding direction) as
"dwell time" (which is spacing in the readout direction).
2910 more files with the same issue
MultibandAccelerationFactor
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The multiband factor, for multiband acquisitions.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The multiband factor, for multiband acquisitions.
2132 more files with the same issue
B0FieldIdentifier
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The presence of this key states that this particular 3D or 4D image MAY be
used for fieldmap estimation purposes.
Each `"B0FieldIdentifier"` MUST be a unique string within one participant's tree,
shared only by the images meant to be used as inputs for the estimation of a
particular instance of the *B<sub>0</sub> field* estimation.
It is RECOMMENDED to derive this identifier from DICOM Tags, for example,
DICOM tag 0018, 1030 `Protocol Name`, or DICOM tag 0018, 0024 `Sequence Name`
when the former is not defined (for example, in GE devices.)
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The presence of this key states that this particular 3D or 4D image MAY be
used for fieldmap estimation purposes.
Each `"B0FieldIdentifier"` MUST be a unique string within one participant's tree,
shared only by the images meant to be used as inputs for the estimation of a
particular instance of the *B<sub>0</sub> field* estimation.
It is RECOMMENDED to derive this identifier from DICOM Tags, for example,
DICOM tag 0018, 1030 `Protocol Name`, or DICOM tag 0018, 0024 `Sequence Name`
when the former is not defined (for example, in GE devices.)
1934 more files with the same issue
InstitutionName
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The name of the institution in charge of the equipment that produced the
measurements.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The name of the institution in charge of the equipment that produced the
measurements.
2910 more files with the same issue
InstitutionAddress
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The address of the institution in charge of the equipment that produced the
measurements.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The address of the institution in charge of the equipment that produced the
measurements.
2910 more files with the same issue
InstitutionalDepartmentName
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-SEfmap02_dir-AP_epi.nii.gz - Field description: The department in the institution in charge of the equipment that produced
the measurements.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The department in the institution in charge of the equipment that produced
the measurements.
2910 more files with the same issue
EffectiveEchoSpacing
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: The "effective" sampling interval, specified in seconds,
between lines in the phase-encoding direction,
defined based on the size of the reconstructed image in the phase direction.
It is frequently, but incorrectly, referred to as "dwell time"
(see the `"DwellTime"` parameter for actual dwell time).
It is required for unwarping distortions using field maps.
Note that beyond just in-plane acceleration,
a variety of other manipulations to the phase encoding need to be accounted
for properly, including partial fourier, phase oversampling,
phase resolution, phase field-of-view and interpolation.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-02_phasediff.nii.gz - Field description: The "effective" sampling interval, specified in seconds,
between lines in the phase-encoding direction,
defined based on the size of the reconstructed image in the phase direction.
It is frequently, but incorrectly, referred to as "dwell time"
(see the `"DwellTime"` parameter for actual dwell time).
It is required for unwarping distortions using field maps.
Note that beyond just in-plane acceleration,
a variety of other manipulations to the phase encoding need to be accounted
for properly, including partial fourier, phase oversampling,
phase resolution, phase field-of-view and interpolation.
1356 more files with the same issue
TotalReadoutTime
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_magnitude1.nii.gz - Field description: This is actually the "effective" total readout time,
defined as the readout duration, specified in seconds,
that would have generated data with the given level of distortion.
It is NOT the actual, physical duration of the readout train.
If `"EffectiveEchoSpacing"` has been properly computed,
it is just `EffectiveEchoSpacing * (ReconMatrixPE - 1)`.
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-02_phasediff.nii.gz - Field description: This is actually the "effective" total readout time,
defined as the readout duration, specified in seconds,
that would have generated data with the given level of distortion.
It is NOT the actual, physical duration of the readout train.
If `"EffectiveEchoSpacing"` has been properly computed,
it is just `EffectiveEchoSpacing * (ReconMatrixPE - 1)`.
2134 more files with the same issue
EchoTime
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-02_phasediff.nii.gz - Field description: The echo time (TE) for the acquisition, specified in seconds.
Corresponds to DICOM Tag 0018, 0081 `Echo Time`
(please note that the DICOM term is in milliseconds not seconds).
The data type number may apply to files from any MRI modality concerned with
a single value for this field, or to the files in a
[file collection](SPEC_ROOT/appendices/file-collections.md)
where the value of this field is iterated using the
[`echo` entity](SPEC_ROOT/appendices/entities.md#echo).
/sub-010114/ses-02/fmap/sub-010114_ses-02_acq-GEfmap_run-01_phasediff.nii.gz - Field description: The echo time (TE) for the acquisition, specified in seconds.
Corresponds to DICOM Tag 0018, 0081 `Echo Time`
(please note that the DICOM term is in milliseconds not seconds).
The data type number may apply to files from any MRI modality concerned with
a single value for this field, or to the files in a
[file collection](SPEC_ROOT/appendices/file-collections.md)
where the value of this field is iterated using the
[`echo` entity](SPEC_ROOT/appendices/entities.md#echo).
580 more files with the same issue
Manufacturer
/sub-010114/ses-02/anat/sub-010114_ses-02_acq-mp2rage_T1w.nii.gz - Field description: Manufacturer of the equipment that produced the measurements.
/sub-010113/ses-02/anat/sub-010113_ses-02_acq-mp2rage_T1w.nii.gz - Field description: Manufacturer of the equipment that produced the measurements.
193 more files with the same issue
ManufacturersModelName
/sub-010114/ses-02/anat/sub-010114_ses-02_acq-mp2rage_T1w.nii.gz - Field description: Manufacturer's model name of the equipment that produced the measurements.
/sub-010113/ses-02/anat/sub-010113_ses-02_acq-mp2rage_T1w.nii.gz - Field description: Manufacturer's model name of the equipment that produced the measurements.
193 more files with the same issue
MagneticFieldStrength
/sub-010114/ses-02/anat/sub-010114_ses-02_acq-mp2rage_T1w.nii.gz - Field description: Nominal field strength of MR magnet in Tesla.
Corresponds to DICOM Tag 0018, 0087 `Magnetic Field Strength`.
/sub-010113/ses-02/anat/sub-010113_ses-02_acq-mp2rage_T1w.nii.gz - Field description: Nominal field strength of MR magnet in Tesla.
Corresponds to DICOM Tag 0018, 0087 `Magnetic Field Strength`.
193 more files with the same issue
PhaseEncodingDirection
/sub-010114/ses-02/anat/sub-010114_ses-02_acq-mp2rage_T1w.nii.gz - Field description: The letters `i`, `j`, `k` correspond to the first, second and third axis of
the data in the NIFTI file.
The polarity of the phase encoding is assumed to go from zero index to
maximum index unless `-` sign is present
(then the order is reversed - starting from the highest index instead of
zero).
`PhaseEncodingDirection` is defined as the direction along which phase is was
modulated which may result in visible distortions.
Note that this is not the same as the DICOM term
`InPlanePhaseEncodingDirection` which can have `ROW` or `COL` values.
/sub-010113/ses-02/anat/sub-010113_ses-02_acq-mp2rage_T1w.nii.gz - Field description: The letters `i`, `j`, `k` correspond to the first, second and third axis of
the data in the NIFTI file.
The polarity of the phase encoding is assumed to go from zero index to
maximum index unless `-` sign is present
(then the order is reversed - starting from the highest index instead of
zero).
`PhaseEncodingDirection` is defined as the direction along which phase is was
modulated which may result in visible distortions.
Note that this is not the same as the DICOM term
`InPlanePhaseEncodingDirection` which can have `ROW` or `COL` values.
193 more files with the same issue