Prefetch settings

 

Section

Setting

Default

Description

General

Server (protocol)

http

Use a secure (HTTPS) or open (HTTP) connection to the server.

Server (address)

NULL

The server address. This value can be a hostname, such as pacs.hospital.com, or an IP address, such as 10.0.0.1. Note: The format (IP address or domain name) of this address must match the format used in the URL line of the browser.

Cycle time

30 minutes

The time between queries for new studies. The more frequent the query cycle, the more traffic that results on the network.

Intensity

Max

The amount of available bandwidth to use while prefetching.

Enable prefetch

Disabled

Turn prefetching on and off. When checked, the workstation queries the server once every cycle for new studies as defined by the prefetch worklist filter. When unchecked, no checking occurs.

Prefetch in standby mode only

Enabled

When prefetching is enabled, the query and subsequent downloads can take CPU cycles away from other viewer activities. On slower machines, this can impact the GUI performance. When Prefetch in standby mode only is checked, the query executes when the viewer is inactive and in standby mode. Clear this checkbox to continue to query and download studies when the viewer is open.

Check server

 

This button checks to see if the configured server is available. Use it to verify your configuration of the server.

Study Data Download/Image

Settings for:

 

The modality the settings in this section apply to. Select Default to set the default settings for all the undefined parameters.

Same as Image settings

Enabled

When checked, the viewer ignores the compression settings on this page and defaults to those on the Image settings page. To activate the settings on this page, clear the checkmark.

Compression

Use default

Disabled

Use the default compression algorithm.

Uncompressed

 

Do not use any compression on the study data.

Compressed

 

Compress the study data. This uses lossless wavelet.

Wavelet

 

Compress the image data using progressive wavelet algorithm.

Auto

Default

The viewer selects the best compression setting based on network configuration and utilization.

Wavelet Quality

Use default

Enabled

Use the default wavelet quality setting.

Lossless

Default

When using wavelet compression for the image data, use a bit conserving quality factor.

 

N:1 Lossy

 

When using wavelet compression for the image data, terminate the decompression when the selected ratio is achieved.