Data
92,968 items of data are available, covering 87,755 participants.
Defined-instances run from 2 to 3, labelled using Instancing
2.
| Maximum | 10 |
| Decile 9 | 10 |
| Decile 8 | 10 |
| Decile 7 | 7 |
| Decile 6 | 6 |
| Median | 6 |
| Decile 4 | 6 |
| Decile 3 | 6 |
| Decile 2 | 6 |
| Decile 1 | 4 |
| Minimum | 0 |
|
|
- There are 11 distinct values.
- Mean = 6.86175
- Std.dev = 2.02428
|
2 Instances
Instance 2 : Imaging visit (2014+)
87,754 participants, 87,754 items
| Maximum | 10 |
| Decile 9 | 10 |
| Decile 8 | 10 |
| Decile 7 | 7 |
| Decile 6 | 6 |
| Median | 6 |
| Decile 4 | 6 |
| Decile 3 | 6 |
| Decile 2 | 6 |
| Decile 1 | 4 |
| Minimum | 0 |
|
|
- There are 10 distinct values.
- Mean = 6.89946
- Std.dev = 2.06944
|
Instance 3 : First repeat imaging visit (2019+)
5,214 participants, 5,214 items
| Maximum | 9 |
| Decile 9 | 6 |
| Decile 8 | 6 |
| Decile 7 | 6 |
| Decile 6 | 6 |
| Median | 6 |
| Decile 4 | 6 |
| Decile 3 | 6 |
| Decile 2 | 6 |
| Decile 1 | 6 |
| Minimum | 0 |
|
|
- There are 5 distinct values.
- Mean = 6.22708
- Std.dev = 0.747985
- 1 item below graph minimum of 5
- 466 items above graph maximum of 7
|
Notes
Acquisition protocol version provides a confound representing the "Study description" field in the T1 DICOMs. The UK Biobank imaging project has some variance in the naming convention of the study description field (e.g. upper/lower case). This variance has been standardised in the creation of this variable.
The variance in the naming convention of the "Study description" field correlates with acquisition date, but is not reliably ordered according to acquisition date.
Resource 2066 indicates the linkage between each Acquisition_protocol_version and the Dicom_study_description. Details of the first occurence and the frequency of occurrence of each acquisition protocol version are also provided.
1 Related Data-Field
| Field ID | Description | Relationship |
|---|
| 20216 | T1 structural brain images - DICOM | Current Field categorises the study description field of the header of Field 20216 |
