Add example dataset for MRI chunk entity

mri_chunk/README.md

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+Example dataset with empty images containing magnetic resonance imaging (MRI) data to illustrate BIDS chunk entity.
+The dataset contains a T2w image from a single subject. T2w image has two chunks -- brain and spinal cord.

mri_chunk/dataset_description.json

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+{
+	"Name": "mri_chunk",
+	"Authors": [
+                "Jan Valosek",
+		"Julien Cohen-Adad"
+	],
+	"BIDSVersion": "BIDS 1.8.0",
+	"DatasetType": "raw"
+}

mri_chunk/participants.json

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+{
+    "participant_id": {
+        "Description": "Unique Participant ID",
+        "LongName": "Participant ID"
+    }
+}

mri_chunk/participants.tsv

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+participant_id
+sub-001

mri_chunk/sub-001/anat/sub-001_chunk-1_T1w.json

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+{
+	"Modality": "MR",
+	"MagneticFieldStrength": 3,
+	"ImagingFrequency": 123.197,
+	"Manufacturer": "Siemens",
+	"ManufacturersModelName": "Verio",
+	"PatientPosition": "HFS",
+	"ProcedureStepDescription": "TEST_VC^SPINE",
+	"SoftwareVersions": "syngo MR B17",
+	"MRAcquisitionType": "3D",
+	"SeriesDescription": "SC_tse_spc_1mm_3palliers_fov256_nopat",
+	"ProtocolName": "SC_tse_spc_1mm_3palliers_fov256_nopat_1",
+	"ScanningSequence": "SE",
+	"SequenceVariant": "SK\\SP\\OSP",
+	"ScanOptions": "PFP",
+	"SequenceName": "*spcR3d1_103",
+	"ImageType": ["ORIGINAL", "PRIMARY", "M", "NORM", "DIS2D"],
+	"NonlinearGradientCorrection": true,
+	"SeriesNumber": 8,
+	"AcquisitionTime": "10:33:32.162500",
+	"AcquisitionNumber": 1,
+	"SliceThickness": 1,
+	"SAR": 0.269146,
+	"NumberOfAverages": 2,
+	"EchoTime": 0.124,
+	"RepetitionTime": 1.5,
+	"SpoilingState": true,
+	"FlipAngle": 110,
+	"AveragesDouble": 1.4,
+	"PartialFourier": 1,
+	"BaseResolution": 256,
+	"ShimSetting": [
+		-5956,
+		12936,
+		-12143,
+		-17,
+		-26,
+		51,
+		158,
+		-40	],
+	"TxRefAmp": 491.928,
+	"PhaseResolution": 1.0098,
+	"PhaseOversampling": 0.197917,
+	"ReceiveCoilName": "NeckMatrix",
+	"CoilString": "C:HEP;NE1,2",
+	"PulseSequenceDetails": "%SiemensSeq%\\tse_vfl",
+	"CoilCombinationMethod": "Adaptive Combine",
+	"MatrixCoilMode": "SENSE",
+	"PercentPhaseFOV": 100,
+	"PercentSampling": 100.98,
+	"EchoTrainLength": 103,
+	"PhaseEncodingSteps": 237,
+	"AcquisitionMatrixPE": 259,
+	"ReconMatrixPE": 256,
+	"PixelBandwidth": 610,
+	"DwellTime": 3.2e-06,
+	"PhaseEncodingDirection": "j-",
+	"ImageOrientationPatientDICOM": [
+		0,
+		1,
+		-2.05103e-10,
+		0,
+		-2.05103e-10,
+		-1	],
+	"ImageOrientationText": "Sag",
+	"InPlanePhaseEncodingDirectionDICOM": "COL",
+	"ConversionSoftware": "dcm2niix",
+	"ConversionSoftwareVersion": "v1.0.20220720"
+}

mri_chunk/sub-001/anat/sub-001_chunk-2_T1w.json

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+{
+	"Modality": "MR",
+	"MagneticFieldStrength": 3,
+	"ImagingFrequency": 123.197,
+	"Manufacturer": "Siemens",
+	"ManufacturersModelName": "Verio",
+	"PatientPosition": "HFS",
+	"ProcedureStepDescription": "TEST_VC^SPINE",
+	"SoftwareVersions": "syngo MR B17",
+	"MRAcquisitionType": "3D",
+	"SeriesDescription": "SC_tse_spc_1mm_3palliers_fov256_nopat",
+	"ProtocolName": "SC_tse_spc_1mm_3palliers_fov256_nopat_2",
+	"ScanningSequence": "SE",
+	"SequenceVariant": "SK\\SP\\OSP",
+	"ScanOptions": "PFP",
+	"SequenceName": "*spcR3d1_103",
+	"ImageType": ["ORIGINAL", "PRIMARY", "M", "NORM", "DIS2D"],
+	"NonlinearGradientCorrection": true,
+	"SeriesNumber": 9,
+	"AcquisitionTime": "10:40:6.177500",
+	"AcquisitionNumber": 1,
+	"SliceThickness": 1,
+	"SAR": 0.978482,
+	"NumberOfAverages": 2,
+	"EchoTime": 0.124,
+	"RepetitionTime": 1.5,
+	"SpoilingState": true,
+	"FlipAngle": 110,
+	"AveragesDouble": 1.4,
+	"PartialFourier": 1,
+	"BaseResolution": 256,
+	"ShimSetting": [
+		-5956,
+		12936,
+		-12143,
+		-17,
+		-26,
+		51,
+		158,
+		-40	],
+	"TxRefAmp": 491.928,
+	"PhaseResolution": 1.0098,
+	"PhaseOversampling": 0.197917,
+	"ReceiveCoilName": "NeckMatrix",
+	"CoilString": "C:NE1,2;SP1,2",
+	"PulseSequenceDetails": "%SiemensSeq%\\tse_vfl",
+	"CoilCombinationMethod": "Adaptive Combine",
+	"MatrixCoilMode": "SENSE",
+	"PercentPhaseFOV": 100,
+	"PercentSampling": 100.98,
+	"EchoTrainLength": 103,
+	"PhaseEncodingSteps": 237,
+	"AcquisitionMatrixPE": 259,
+	"ReconMatrixPE": 256,
+	"PixelBandwidth": 610,
+	"DwellTime": 3.2e-06,
+	"PhaseEncodingDirection": "j-",
+	"ImageOrientationPatientDICOM": [
+		0,
+		1,
+		-2.05103e-10,
+		0,
+		-2.05103e-10,
+		-1	],
+	"ImageOrientationText": "Sag",
+	"InPlanePhaseEncodingDirectionDICOM": "COL",
+	"ConversionSoftware": "dcm2niix",
+	"ConversionSoftwareVersion": "v1.0.20220720"
+}