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PACS system task is mainly the daily generation of a variety of medical images (including nuclear magnetic, CT, ultrasound, a variety of X-ray machines, a variety of infrared instrument, microscope and other equipment to produce images) through a variety of interfaces (analog, DICOM, the network) in a digital way to save a large number of when the need for certain authorization can be quickly recalled back to the use of the same time, while increasing the number of auxiliary diagnostic Management Functions. Since there are many types of medical imaging device interfaces and a large amount of data is generated every day, how to transfer data between various imaging devices and how to organize and store the data is critical to the system.

The real technology of PACS lies in the interface technology and storage technology, and the storage technology of PACS is already relatively mature: large-capacity hierarchical storage, pre-extraction mechanism. But in terms of interface technology, because the interface standard is changing day by day, the interface technology is also constantly evolving. In terms of interface, there are mainly the following:

1) analog interface

2) network interface

3) DICOM interface

5. ultrasound introduction

7. PACS interface technology

1. video interface: divided into standard video and non-standard video (connecting the video signal must pay attention to the *** ground)

1. video interface: divided into standard video and non-standard video (connecting video signals must pay attention to *** ground

Standard video: color mainly PAL (768 × 576) and NTSC (640 × 480) two systems

Black and white corresponds to the PAL and NTSC have CCIR and RS170 two

Non-standard video: corresponds to the CT, MRI is mainly 512 × 512

2. network interface:

Some companies do not have the strength to develop the DICOM interface, and have a network card, so that you can access the file through network protocols (such as FTP), through the decoding, you can get the image

3. DICOM interface:

An international standard interface, generally discussed in the context of the Ethernet situation is based on the TCP/IP protocol. DICOM services can be accessed through the DICOM interface. DICOM services are varied, the main use of storage services, query/return services, film printing services

4. Laser Camera Interface:

Generally speaking, there are two types of interfaces for laser cameras, the 3M952 protocol and the DICOM protocol. 3M952 works through the serial port (command port) and the parallel port (data port), and the laser camera interface works with the serial port (command port) and the parallel port (data port). parallel port (data port) work together to realize the photo image. DICOM printing is realized by accessing the DICOM print service to print.