Company developed less intimidating gantry designGE rolled out a new series of high-field MRI scanners in September that promises to increase patient comfort while fostering real-time interactive MRI applications. The new Signa MR/i series employs
Company developed less intimidating gantry design
GE rolled out a new series of high-field MRI scanners in September that promises to increase patient comfort while fostering real-time interactive MRI applications. The new Signa MR/i series employs a new flared gantry design that shortens the length of the magnet bore, making the scanner less intimidating to claustrophobic patients, according to high-field marketing manager Brian Duchinsky.
Signa MR/i uses the same CX magnet employed in GEs Signa Horizon LX series, and has the same patient bore width of 60 cm in diameter. The overall length of GEs 1-tesla and 1.5-tesla magnet cartridge also remains the same, at 172 cm. But GE abandoned its old, two-stage flared opening scheme for a sculptured look that makes the entrance more inviting, Duchinsky said. By keeping the overall length unchanged, GE preserved magnet homogeneity specifications that were the main selling point of the Horizon LX line when the high-field, short-bore scanners were introduced last year (SCAN 8/20/97).
We tightened up that critical dimension in the center that had a lot to do with the patients perception about how big the tube really is, he said.
The i in MR/i stands for interactive, signifying improved image processing power. GE added a new reconstruction engine that increases the systems standard reconstruction speed to 20 images per second. With optional hardware, the systems performance increases to 50 images per second, Duchinsky said. The reconstruction engine works with GEs standard operator console and normal, phased-array radio-frequency coils.
The console itself was upgraded in May to a Silicon Graphics Octane computer. A future, optional enhancement, based on research first performed with GEs optimized cardiovascular MR platform, will further boost the scanners processing speed up to 150 images per second, Duchinsky said.
The emphasis on real-time applications reflects GEs faith in real-time workups as an emerging trend in MR applications development. Several other companies are working on real-time applications products.
Cryogen conservation is another selling point of Signa MR/i. The 1-tesla and 1.5-tesla MR/i high-field models are equipped with new K-4 cryocooler technology that reduces cryogen refills to once every three years.