Acquisition
(0018,0081)
Echo Time
Keyword: EchoTime
Time in milliseconds between the middle of the excitation pulse and the peak of the echo produced.
Tag Attributes
- Tag ID
- (0018,0081)
- Compact
- 00180081
- Keyword
- EchoTime
- VR
- DS — Decimal String
- VM
- 1
- Retired
- No
Module(s)
MR Image Module
Engineering Notes
Defines T2 weighting in MRI. Critical for sequence identification, protocol QA, and AI model inputs.
Troubleshooting
Inconsistent Echo Time values across slices of the same series indicate acquisition issues at the scanner, not a DICOM problem.