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Technical innovation in MR

K4 Technology

Superconducting MRI systems are preferred for higher magnet field strength, homogeneity and stability. However, conventional MR scanners require a refill of cryogen (liquid helium) two to four times a year. Replacing liquid helium requires trained maintenance personnel and can be a time consuming and costly procedure. But, an MR scanner with K4 technology needs a refill of helium only once in 7 years, thereby phenomenally increasing the productivity of the system and decreasing running costs.
Many methods have been proposed over the years to eliminate the need for liquid helium replacement in superconducting MRI magnets. GE Medical Systems has developed a new cooling technology which will revolutionise magnet performance and nearly eliminate cryogen consumption.

This innovation provides the means to develop lower temperature (4o Kelvin) cooling systems with extremely low cryogen consumption. This consists of a new cryocooler cold head and special helium vessel design. The K4 technology is used in GE's new generation Signa Contour MRI systems.
By using a high performance cryocooler to maintain a 4 degree Kelvin temperature, any gaseous helium is reliquified before it has a chance to escape, thus achieving a virtually cryogen consumption-free mode. K4 will have a great impact on reduction of an MRI exam cost and make it accessible to a greater number of patients worldwide.
GE continues to pioneer new magnet technologies which improve system performance, reliability and operating economics.


Cryo Cooling System

Signa Contour Supercon
0.5T MR Imaging System

A path-breaking innovation in MRI from GE Medical Systems, the company with the world's largest installed base of high-field and low-field MRI systems, the Signa Contour incorporates the revolutionary K-4 technology which eliminates the need for liquid helium replacement in superconducting MRI magnets.




  • Relatively inexpensive to site
  • Low cryogen and power consumption
  • Efficient patient data and image management
  • Lower daily operating costs and increased productivity
  • Protected by the GE Continuum of upgrades
  • Advantage Windows-based operator interface
  • DICOM 3 compatibility allows networking of exams throughout your diagnostic imaging department
  • Advanced applications like Multi-Channel Phased Array imaging, advanced vascular and cardiac imaging
  • Maximum patient comfort


    Please write to us for more information on the Signa Contour/K4 technology.
  • Images Journal
    Back Issues
        Issue 24, December 1998
    Contents
    New Imaging Technologies
    The latest advances in MRI
    The latest advances in MRI (contd..)
    Technical Innovation in MR
    MRI case study
    The accident trauma management
         demo at HOSMAT/GE CT
         Synergy Plus
    Misuse of ultrasound equipment
         for foetal gender determination
    Recent wins



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