37 lines
1.7 KiB
Markdown
37 lines
1.7 KiB
Markdown
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# Viewer: Study Prefetcher & Stack Prefetch
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Prefetching the stack of images of the active viewport is enabled by default for
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cornerstone viewports via cornerstone tools's stack prefetch functionality.
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In order to have a more customizable alternative for prefetching, OHIF provides
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a built-in study prefetcher functionality which allows the user to set the order
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in which the display sets are prefetched, the granularity, the timeout and
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whether or not display a progress bar in the display set (close to the thumbnail
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image) in the study browser.
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You can customize these options via the viewer's configuration:
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```js
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window.config = {
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/**
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* OHIF's study prefetcher configuration.
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*
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* @param {boolean} enabled Whether to enable/disable OHIF's study prefetcher
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* @param {('all'|'closest'|'downward'|'upward'|'topdown')} order Fetching order: all display sets, the closest ones, downward or top down fashion based on the currently selected display set
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* @param {number} displaySetCount How much display sets should be prefetched at once (note: this attribute is ignored if order was set to 'all')
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* @param {boolean} preventCache Prevent images to be cached in Cornerstone Tools's request pool manager
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* @param {number} prefetchDisplaySetsTimeout Prefetch timeout
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* @param {boolean} displayProgress Whether to display or not the progress bar in the display set
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* @param {boolean} includeActiveDisplaySet Include or not the active display set while prefetching
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*/
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studyPrefetcher: {
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enabled: true,
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order: 'all',
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displaySetCount: 1,
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preventCache: false,
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prefetchDisplaySetsTimeout: 300,
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displayProgress: false,
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includeActiveDisplaySet: true,
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},
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};
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```
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