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How Do I Set Up the DICOM Communication / Import Negotiation?

Before two stations begin exchanging DICOM data, they have to negotiate the best method for the transfer. This is done by each side presenting its possible transfer methods until a match is made. This process is known as Transfer Syntax Negotiation. The sender dictates the order syntaxes are negotiated in. However, the receiving station gets to present a list of its preferred choices. The list presented by the RamSoft software can be modified through the Compression dialog. This dialog is launched by clicking Settings > Server Settings > Compression.

The order that the RamSoft station will negotiate in is based on this section.

Preferred 1 will be proposed first. If that is not accepted, Preferred 2 and later Preferred 3 will be proposed. Due to the structure of the DICOM message, the receive compression negotiation settings are global. This means that this list is presented to all DICOM stations that attempt to send data to the RamSoft stations.

The default order presented by RamSoft is Lossless, Uncompressed, and Lossy.

Image import negotiations

Different compression syntaxes can be applied to still images and Cine images. The settings in this menu affect compression settings used when acquiring new images through document scanning, film digitizing and import.

FieldDescription
Still CompressionThe Still Compression dropdown menu determines the compression method used when capturing still images (single frame)
Cine CompressionThe Cine Compression dropdown menu determines the compression method that will be used when capturing Cine images (multi-frame)
JPEG 2000 Lossy RatioThe JPEG 2000 Lossy Ratio track bar can be used to set the default lossy compression ratio used when performing JPEG 2000 lossy compression on images. A ratio of 30 provides 30:1 lossy compression. JPEG 2000 lossy ratio is only used during communication.
Lossy JPEG QualityThe Lossy JPEG Quality track bar can be used to set the default JPEG quality factor used when performing JPEG lossy compression on images. A quality factor of 75 is the default.
Cine JPEG QualityIf the JPEG Lossy compression is used for Cine images, the Cine JPEG Quality track bar determines the quality factor used by the algorithm. If Cine Compression is not set to JPEG Lossy, this track bar has no effect.