The main point for the architecture and performance of PACS

Typically a PACS network consists of a central server or servers that store a database containing the images connected to one or many clients via a LAN, WAN or internet which provide or utilize the images."nThe core part of a PACS network is called DICOM server. Its purpose is to receive DICOM images from any node in the network such as different modalities, or to list studies on a workstation and directly retrieve the ones of interest. For choosing the PACS quality, security and accessories of PACS & DICOM server has a main role."nUsing the PACS for small clinics up to the big hospitals is quite different. Be sure that your PACS system can handle different modalities and users simultaneously. "nUser authentication and authorization is necessary for any secure system especially when the system designed to be accessed from different nodes and users in a network. However, no direct solution is anticipated in DICOM standard for this issue. Payvand PACS offers a tricky solution for authenticating users and authorizing their access to the studies."nProtecting a data for reduction of hacking is very important in medical field especially when our server is attached to the internet, so we used many other protections in addition to user define like: fire wall, user log files, and users online observing, and storing the entire modified file in the separate database. So if the authorized user by mistake changed any images the admin can restore original images. Store and retrieve of reports as a structural report (SR) is very important. "nDifferent OS platforms haven't same strength, when we need store huge data, or high perfor-mance and security; the Linux OS is our choice for the servers. "nThis system has a lot of security and accessories fea-tures and it's the first PACS system design and built in open sources platform (Like Linux, MYSQL...) in the Meddle East and CRS Region.