Daikon is a pure JavaScript DICOM reader:
- Works in the browser and Node.js environments.
- Parses DICOM headers and reads image data.
- Supports compressed DICOM data.
- Orders and concatenates multi-file image data.
- Supports RGB and Palette data.
- Supports Siemens "Mosaic" image data.
- Parses Siemens CSA header.

Supported Transfer Syntax:
1.2.840.10008.1.2 (Implicit VR Little Endian)
1.2.840.10008.1.2.1 (Explicit VR Little Endian)
1.2.840.10008.1.2.2 (Explicit VR Big Endian)
1.2.840.10008.1.2.1.99 (Deflated Explicit VR Little Endian)
1.2.840.10008.1.2.4.50 (JPEG Baseline (Process 1) Lossy JPEG 8-bit)
1.2.840.10008.1.2.4.51 (JPEG Baseline (Processes 2 & 4) Lossy JPEG 12-bit)
1.2.840.10008.1.2.4.57 (JPEG Lossless, Nonhierarchical (Processes 14))
1.2.840.10008.1.2.4.70 (JPEG Lossless, Nonhierarchical (Processes 14 [Selection 1]))
1.2.840.10008.1.2.4.90 (JPEG 2000 (Lossless Only))
1.2.840.10008.1.2.4.91 (JPEG 2000)
1.2.840.10008.1.2.5 (RLE Lossless)

https://github.com/rii-mango/Daikon