The data flows between applications and users within
the distributed environment of the MedSeC project:
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Interactive remote control (Datastream 1):
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The image data are transferred from the project image server (DICOM-PACS)
of the hospital to the application server. The application server, located
outside the hospital, starts an interactive image processing such as 3D
visualization. The firewall admits the datastream because it has been initiated
from inside the hospital network. The data are encrypted during the transfer
via the DICOM protocol.
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Provision for external partners (Datastream 2):
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For an external diagnosis, the images are released by the physician or
radiologist of the hospital. The images are first encrypted with the public
key of the externally located physician and then temporarily stored on
the external DICOM server. The external user is informed about this provision
via e-mail or phone.
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Use of external data (Datastream 3):
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The data released in datastream 2 can be used by an authorized external
user. This user can view the images for diagnostic purposes. If necessary,
the external user can send the images to an external application server
to preprocess or postprocess the images. The corresponding findings can
be encrypted, saved on the DICOM server, or sent via e-mail to the requesting
physician.
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Off-line calculation (Datastream 4):
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In the case of time-consuming image processing (e.g., precalculating 3D
images or movies) the application server receives the image data in batch
mode. The application then stores the calculated images back onto the DICOM
server. Stored data is encrypted with an application-specific key. This
process does not require user interaction. Only authorized applications
or users may have access to this data.
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