Acquisition
(0018,1111)
Distance Source to Patient
Keyword: DistanceSourceToPatient
Distance in mm from the X-ray source to the patient's entrance surface.
Tag Attributes
- Tag ID
- (0018,1111)
- Compact
- 00181111
- Keyword
- DistanceSourceToPatient
- VR
- DS — Decimal String
- VM
- 1
- Retired
- No
Module(s)
X-Ray Acquisition Module
Engineering Notes
Used with SID for magnification calculation. Also used in entrance dose calculation for radiographic quality assurance.
Troubleshooting
Inconsistent with Source-to-Detector distance — verify both are captured from the same acquisition geometry.