Five Imaging Modes: From Observation to Treatment
The VC-1600 imaging chain is organised as a clinical path: observe with white light and colour differentiation, examine superficial vessels more closely, then address deep vessels and bleeding points during treatment — with texture and luminance reconstruction available across the chain.
The five modes
| Mode | Full name | Stage | Purpose |
|---|---|---|---|
| HLI | High Color Restored White Light Imaging | Observation | High colour-restoration white light for routine viewing |
| TCI | Tissue Color Differentiation Emphasizes Imaging | Observation | Emphasises colour differences between tissues |
| SVI | Superficial Vascular Emphasis Imaging | Examination | Narrow-spectrum emphasis of superficial vessels |
| DHI | Deep Red Imaging | Treatment | Red-spectrum imaging using narrower green and red illumination to raise the contrast of deep vessels and bleeding points against surrounding mucosa |
| R-TLC | Texture & Luminance Reconstruction Enhancement | Enhancement | Multi-band digital filtering that separates the image into frequency bands and enhances the bands carrying vessel, mucosal and tissue-contour detail |
How R-TLC works
R-TLC decomposes the endoscopic image in the spatial domain into detail bands of different frequencies, then enhances the bands where vessels, mucosa and tissue contours sit. Under a high signal-to-noise ratio, this multi-dimensional enhancement raises the visibility of diagnostically useful information. Two R-TLC mode settings are shown in the manufacturer's material.
Reading the chain as a buyer
When comparing systems, ask how each mode is produced (illumination spectrum, processing, or both), which modes are available on which scope, and what the mode set means for your case mix. Our imaging modes guide walks through those questions.
Frequently asked questions
The VC-1600 front panel carries direct keys for HLI, SVI, DHI and TCI, and R-TLC mode options are available in the panel settings.
DHI is deep red imaging: it uses red-spectrum illumination to improve the contrast of deep vessels and bleeding points against the surrounding mucosa, supporting the treatment stage of the examination.