Overview

The SliceRecon project defines three main objects:

• A projection server, that listens to incoming projection data.
• A reconstructor, that can reconstruct arbitrarily oriented slices from projection data.
• A visualization server, that listens to requests from a visualization server, and fulfils them by calling the reconstructor.

Furthermore, it has a notion of a plugin, which is a stand alone server that can postprocess reconstructed slices before sending them to the visualization server.

The incoming, internal, and outgoing communication is all handled by the TomoPackets library.

Projection server

The projection server listens for incoming data packets. It expects first packets that describe the tomographic scan. This is done using:

• GeometrySpecification: information on where the object is in relation to the acquisition geometry.
• ScanSettings packet: information on the number of darks and flats.
• A packet describing the acquisition geometry, such as a ConeVecGeometry packet.

After receiving these packets, the server is able to process ProjectionData packets. First the darks and flats should be sent, after which standard projections can be streamed to the projection server.

Reconstructor

The reconstructor is an internal object that decouples the projection server from the visualization server, and has no public interface. It receives projection data from the projection server, and fulfills reconstruction requests from the visualization server.

Visualization server

The visualization server registers itself to the visualization software by sending a MakeScene packet. It then waits to receive KillScene, SetSlice and RemoveSlice packets. If it receives a SetSlice packet, it requests a new slice reconstruction from the reconstructor. It sends this reconstructed slice back either to the visualization software using a SliceData packet if there are no active plugins, or to the first plugin.

Plugin

A plugin is a simple server, that registers itself to the visualization server, and listens to incoming SliceData packets. It then manipulates the data in this SliceData packet, before sending it along to the next plugin in line, or to the visualization software. The plugin system thus has the following structure:

There can be more than one plugin, but they are assumed to be applied one after the other. The dashed line is only used if there are no plugins.