DOTmed Home MRI Oncology Ultrasound Molecular Imaging X-Ray Cardiology Health IT Business Affairs
News Home Parts & Service Operating Room CT Women's Health Proton Therapy Endoscopy HTMs Mobile Imaging
SEARCH
Current Location:
>
> This Story

starstarstarstarstar (1)
Log in or Register to rate this News Story
Forward Printable StoryPrint Comment

 

More Industry Headlines

New machine learning tool identifies breast lesions likely to become cancerous May help reduce unnecessary surgical procedures

MR shows promise for predicting neurological outcomes in cardiac arrest survivors May also help develop therapies

Carestream introduces a more affordable DRX-Transportable System/Lite retrofit solution Equipped with a wireless tablet PC

FDA gives nod to TransEnterix Senhance Surgical Robotic System Provides greater control while reducing abdominal surgery invasiveness

Bracco Imaging acquires SurgVision Enables development of a real-time fluorescence image-guided surgery platform

CT lung cancer screening combined with smoking cessation is worth expense $14,000 saved per quality-adjusted life-years gained: study

Phase I trial demonstrates safe use of radiotracer produced in minutes Manufactured using a Ga-68 generator and a cold kit vial

Esaote launches MyLab9 eXP ultrasound system Designed to enhance image clarity, workflow and performance

New research finds brain MR study groups don't reflect U.S. population demographics This must change for large, multicenter studies

Jonas Salk’s gift to the world Polio was a scourge, his education matched well with what was needed to find a cure

GE sets sights on MRI helium conservation

by Brendon Nafziger , DOTmed News Associate Editor

In addition to the 5 million liters used in production, roughly 6 million liters are also used in maintenance of devices already in hospitals and clinics.

Jarvis said newly installed magnets need to be "topped up" with a couple of hundred liters of helium that are lost during transit (the longer the transportation, the more helium is evaporated). However, thanks to technology developed over 15 years ago, modern magnets generally don't need routine helium infusions, Jarvis said.
Story Continues Below Advertisement

The (#1 Resource) for Medical Imaging and Peripherals. Call 1-949-273-8000

As a Master Distributor for major brands Barco, Philips, and Sony, we offer custom imaging solutions. With our renowned OEM Solutions and Service/Repair Center, Ampronix is a one-stop shop for HD Medical LCD Displays--Printers--Recorders--4K Cameras




Zeroing in

Routine helium infusions are unneeded because in the late 1990s, GE introduced so-called zero boil-off technology to its MRIs, Jarvis said. In this, helium that evaporates from heat in the magnet is recondensed and returned to the system.

"It stays as a closed cycle system. No helium is required to be added," Jarvis said.

By 2004, GE was selling exclusively zero boil-off technology MRIs, Jarvis said. However, even these "zero boil-off" magnets might need occasional small amounts of helium when the coldhead compressors, used to recondense the gas, are serviced every couple years. They can also need substantially more helium if a power outage causes the cooling systems to crash, resulting in larger boil-offs. This is a danger that besets magnets in countries with less reliable electricity delivery services, Jarvis said.

Also, not all MRIs in operation today were built post-2004. Many "legacy" machines are still working, either in their original place of installation or having been resold to a new buyer, often in another country. Jarvis estimates maybe 20 percent of systems are running with the pre-zero-boil-off technology.

"Old magnets simply never die," he jokes.

Conservation efforts

In his testimony, Rauch said GE has invested about $1 million in technology in its factory to bolster helium recycling and conservation. One investment was in recapturing equipment, used to snag helium lost in the manufacturing process, which is then recompressed and sold back to the gas suppliers at the factory.

Jarvis said the company's also working on proprietary efficiency-boosting techniques. For instance, workers might pre-cool a magnet with liquid nitrogen, which is cheaper and easier to get, before filling it with helium. He said they have also been running computer dynamic fluid simulations to study how liquid helium is transferred and used, and have committed some engineering know-how to improving the transfer lines from the tankers to the magnet.

"The transfer lines can be heavily optimized, in terms of material construction, control systems, to best match them to the end vehicle, the magnet that's receiving the helium," he said.
<< Pages: 1 - 2 - 3 >>

Related:


(268)
(20)
(153)

Marshall Shannon

They can also need substantially more helium if a power outage c

May 17, 2012 10:41

This allows these magnets to consume more than a NON-ZERO boil off system. As during outages the usage is 10-40% more loss than any magnet on the market.

GE does a GREAT job when all systems are 100% but power outages do happen.

A normal system loses power for a 3 day weekend and they lose 3-8% so on Monday you have a big loss and some emergency planning.

On a GE Zero, that same 3 day weekend may cost you up to 20-30% and possibility a quenched magnet by the time monday rolls around so GE systems DO require DAILY MONITORING to catch failures fast, even if that monitoring system costs in excess, the potential risk without it exceeds any cost it may have.

Log inor Register

to rate and post a comment

You Must Be Logged In To Post A Comment

Advertise
Increase Your
Brand Awareness
Auctions + Private Sales
Get The
Best Price
Buy Equipment/Parts
Find The
Lowest Price
Daily News
Read The
Latest News
Directory
Browse All
DOTmed Users
Ethics on DOTmed
View Our
Ethics Program
Gold Parts Vendor Program
Receive PH
Requests
Gold Service Dealer Program
Receive RFP/PS
Requests
Healthcare Providers
See all
HCP Tools
Jobs/Training
Find/Fill
A Job
Parts Hunter +EasyPay
Get Parts
Quotes
Recently Certified
View Recently
Certified Users
Recently Rated
View Recently
Certified Users
Rental Central
Rent Equipment
For Less
Sell Equipment/Parts
Get The
Most Money
Service Technicians Forum
Find Help
And Advice
Simple RFP
Get Equipment
Quotes
Virtual Trade Show
Find Service
For Equipment
Access and use of this site is subject to the terms and conditions of our LEGAL NOTICE & PRIVACY NOTICE
Property of and Proprietary to DOTmed.com, Inc. Copyright ©2001-2017 DOTmed.com, Inc.
ALL RIGHTS RESERVED