1 · Overview

What CBCTScope is

CBCTScope opens the CBCT exports already on your computer and reads them in eight purpose-built modes. It is not an installed application with an icon: it is a small local program you start once per reading session, and your web browser is the screen. Nothing about it is online. There is no account, no cloud, and no upload; the scan is read in place from the folder it is already in, and it never leaves your machine.

Three ideas organize the whole program:

1. Local-first. Every pixel stays on this computer. The viewer works without a network connection, and by construction it cannot send a scan anywhere (chapter 10 details the mechanism).
2. One instrument, eight reading modes. The same opened volume can be read as orthogonal MPR slices with a 3D render, a multi-slice grid, a curved panoramic with cross-sections, axis-corrected TMJ sections, a freehand reslice, a virtual cephalogram, a density-grown region with airway analysis, or a stitched pair of volumes. Switching modes never touches the data; each mode is a different camera on the same volume.
3. The agent moves the camera; the human reads. An AI assistant can drive the viewer through a built-in MCP server: open a scan, switch modes, set the window, step through slices, take snapshots. It can do nothing else. No part of the software, agent-driven or not, produces findings or interpretations (chapter 9).

Volumes and radiographs

CBCTScope opens two classes of image:

• CBCT volumes: uncompressed DICOM exports, as a slice-series folder, a DICOMDIR tree, a multiframe file, or a single slice of a series. Volumes get the eight reading modes.
• 2D radiographs: single uncompressed 16-bit DICOM images of modality PX, DX, CR, or IO (panoramic, digital and computed radiography, intraoral). A radiograph gets a dedicated single-image view with window, gamma, invert, zoom, pan, and fit. The volumetric modes do not apply. This exists so multi-reader studies can read both image classes in one instrument under identical display settings.

The demo phantom

A geometric test phantom is built into the program: simple geometric shapes in HU, generated by the program, with an arch of tooth-like cylinders (layered like enamel, dentin and pulp, one of them metal-bright), an air column, paired air cavities and two columns where a TMJ view finds something to cut. It is a test object for trying the controls, not anatomy. It loads the moment the viewer starts, so every part of this manual can be tried with zero patient data. The volume list names it Geometric test phantom. Until you open an export of your own, the status line at the bottom says that your scan is read on your machine and never uploaded, and links to stills of a real, consented scan. When the program is started in demo mode it additionally never remembers a previously opened scan (section 2.4).