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Filters are used in many places in OnePacs for the purpose of selecting studies that meet certain criteria. (They are processed similar to database SQL query strings) Filters are created through a common interface, which appears as follows:
The user has the option of either creating a filter through use of the GUI-based elements at the top portion of the screen, that is, through the selection of Facilities, modalities, study description, date, and other criteria, or though use of the “Advanced Expression” text edit box at the bottom, into which a OnePacs query string can be entered. Additionally, the “Filter string” button at the bottom of the window generates the text value of the filter string generated through use of the GUI elements and allows the user to copy that string
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