Performance requirements of PACS image workstation in image Department

Performance requirements of PACS image workstation in image Department
1. The image workstation must be individually optimized for each image mode. The displayed image must have diagnostic significance and quality (diagnostic quality ).
A. CT and MR should be able to automatically draw the positioning line of the Plane Surface
B. synchronous display of related CT/MR Series
C. DSA supports dynamic display and dicom jpeg lossless compression.
D. The echo map supports dynamic display and dicom jpeg baseline compression.
E. Support voi lut used in Cr/DR
F. Support orthogonal 3-view, stress-rest comparison of nuclear medicine cardiac map, dynamic display of gated SPECT, and quantification of kinetic energy
G. Supports positron (PET) orthogonal 3-View display and triangulation.
H. Support for PET-CT Image Display and Fusion
I. Support the true color and pseudo color image display functions of ultrasound, nuclear medicine, endoscope, pathological microscopy and other images. Color images must also be able to adjust the contrast.
2. The image workstation should emphasize that key basic functions are easy to use and can complete diagnosis in the shortest time.
A. Rolling and page changing are fast and convenient.
B. quick and convenient window width adjustment. CT has preset standard W/L values.
C. quick and convenient change of inspection, series, and image
D. Support industrial standard right-click window width and contrast
E. Supports adjusting the window width and bit guided by histogram and ROI
F. Basic measurements such as length, angle, area, perimeter, pixel value, and CT value are supported.
G. supports basic image processing functions: horizontal vertical image, rotation, zoom in and out, magnifiers
H. Text and arrow tagging
I. Functions rarely used by other doctors should be hidden.
3. Supports multi-screen display, especially dual-screen and three-screen display. One of the three screens is used for reporting.

Performance Requirements for viewing workstations in clinical departments
Images and reports of clinical departments can be viewed in one of the following situations:
1. images are automatically compressed from the server and downloaded using standard or simplified photo and video workstation software. Small dual-screen workstation (17-18 "display), one screen for viewing reports, and the other for viewing images.
2. Web thin terminal browsing, browsing through the browser's image plug-in ActiveX software.
3. Use an NT terminal to remotely log on to the server to view images and reports through the Windows Server Terminal service function (NT Terminal Services.
4. Web browsing: Web cgi allows you to remotely browse key images and reports from the server.

The above three are the most cost-effective and the most comprehensive functions. The difference between 1 and 2 lies in the software functions and installation process. 1 software features strong, but also all points, but need to be installed. 2. It can be automatically downloaded and installed, but the kinetic energy may be limited. 4 has limited functions, but it is easier to use it outside the hospital.

The combination of 1, 3, and 4 can be considered based on the needs of hospital clinicians. In this way, the browsing workstation and the image workstation can basically meet the same requirements.

Basic requirements of PACS Server
1. Basic DICOM services: Echo SCU/SCP, store SCU/SCP, query/retrieve SCU/SCP, storage commitment SCP, modality worklist SCU, structured reporting SCP.
2. the PACS system has the latest DICOM 3.0 support for relevant imaging modes, including CT, MRI, CR/DR, X-ray (FD = film digitizer), and DSA (X-ray angiography), ultrasound, echocardiography, endoscopy, microscopy, and nuclear medicine (Nuclear Medicine), positron (PET) and PET-CT and so on.
3. The image server features reliable performance and is easy to maintain without maintenance. It can be upgraded and expanded at a low cost (about 1 TB of images per year ). Windows 2000 Server, Microsoft SQL, Gui maintenance interface can reflect the superiority of this aspect.
4. The image server must be able to automatically compress images in DICOM standard format at regular intervals. The compression ratio can be 2 to 10: 1. Some image modes can be lossy, with a compression ratio of up to 30: 1 or more.
5. All images (including compressed images) are saved in standard DICOM 3.0 format.
6. All image data is saved online and backed up regularly. To shorten the retrieval time and facilitate database management, it is best to have two databases on the server: online database and archive database. Images of the archived database can be easily transferred to the online database.
7. Automatic Image distribution and migration are available. In this way, some key image workstations do not need to download images temporarily.
8. Supports multiple servers (data delivery) and parallel (hot backup ).