Vista Imaging Vista Routing - Manual (Page 75)

Routing User Guide Troubleshooting Routing
for that workstation. Images not found in local storage will be retrieved from their
originating site.
How the RC Column is Populated
The RC (Remote Cache) column in VistARad's exam lists is populated with a
destination-specific indicator when a routed exam is received by a destination. The same
indicator is removed from the RC column when the routing software deletes the local
copy of the exam.
The addition or removal of the indicator is dependent on a specific "representative image"
in the routed exam. A "representative image" is the last image processed by an Image
Gateway for a given exam. Typically, the representative image is also the last image in an
exam's clinical sequence.
Image Gateways process images in the order that they are received from a modality.
Some modalities may send images to Image Gateways in an order other than the expected
clinical sequence. If this occurs, and if such an exam is routed, the RC column may be
populated before transmission of all the exam's images has completed. A user opening
such an exam may experience a delay while part of the exam is retrieved from the
sending site.
Preventing Transmission of Duplicate Exams
For Imaging destinations, the transmission processor will check the destination to see if
the image to be routed is already present. If a duplicate of the image is found, the
transmission processor removes the redundant entry from the transmission queue, and
moves on to the next entry in the queue.
For DICOM destinations, image management and duplicate checking is the responsibility
of the destination system.
April 2006 VistA Imaging V. 3.0, Patch 18 67