Image Pixel
(0028,0101)
Bits Stored
Keyword: BitsStored
Number of bits stored for each pixel sample. Must be ≤ Bits Allocated.
Tag Attributes
- Tag ID
- (0028,0101)
- Compact
- 00280101
- Keyword
- BitsStored
- VR
- US — Unsigned Short
- VM
- 1
- Retired
- No
Module(s)
Image Pixel Module
Engineering Notes
The actual number of significant bits per pixel. CT typically uses 12 bits stored in a 16-bit allocation. Affects dynamic range and contrast resolution.
Troubleshooting
High Bit (0028,0102) must equal Bits Stored − 1. Violation causes incorrect pixel value interpretation.
Common Values
| Value | Meaning |
|---|---|
| 8 | 8-bit — 256 values |
| 10 | 10-bit — CR common |
| 12 | 12-bit — CT standard |
| 14 | 14-bit — DR/mammography |
| 16 | 16-bit — full 16-bit depth |