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 'Boil off Rate' 
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Result : Searchterm 'Boil off Rate' found in 1 term [] and 10 definitions [], (+ 3 Boolean[] results
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Boil off Rate
 
Rate of cryogen (liquid helium) evaporation in superconducting magnets, usually measured in liters of liquid per hour. The boil off rate of cryogen increases during ramping of the magnet and with eddy currents induced in the cryoshields by pulsed field gradients. In calculating cryogen consumption additional transfer and filling losses have to be considered.
See also Cryoshielding and Helium.

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Further Reading:
  Basics:
Cryogenic Liquids and their Hazards
   by www.ccohs.ca    
Zero Boil Off Cryostats
Friday, 23 September 2011   by www.cryogenicsociety.or    
  News & More:
A hot time for cold superconductors
Tuesday, 9 December 2003   by www.brightsurf.com    
MRI Resources 
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Aurora® 1.5T Dedicated Breast MRI SystemInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
From Aurora Imaging Technology, Inc.;
www.auroramri.com/mri/product/ The Aurora® 1.5T Dedicated Breast MRI System with Bilateral SpiralRODEO™ is the first and only FDA approved MRI device designed specifically for breast imaging. The Aurora System, which is already in clinical use at a growing number of leading breast care centers in the US, Europe, got in December 2006 also the approval from the State Food and Drug Administration of the People's Republic of China (SFDA).
'Some of the proprietary and distinguishing features of the Aurora System include: 1) an ellipsoid magnetic shim that provides coverage of both breasts, the chest wall and bilateral axillary lymph nodes; 2) a precision gradient coil with the high linearity required for high resolution spiral reconstruction;; 3) a patient-handling table that provides patient comfort and procedural utility; 4) a fully integrated Interventional System for MRI guided biopsy and localization; and 5) the user-friendly AuroraCAD™ computer-aided image display system designed to improve the accuracy and efficiency of diagnostic interpretations.'

Device Information and Specification
CLINICAL APPLICATION Breast MRI
CONFIGURATION Short bore compact
COILS Breast transmit receive (TR) coil
IMAGING MODES Bi-lateral RODEO fat suppression, high resolution Rotating Delivery of Excitation Offresonance Spiral, integrated targeting SW compatible with major MR guided intervention equipment.
TR 10 ms for gradient echo and less than 2,500 ms for T2 weighted spin echo
TE From 5 ms for RODEO Plus to over 80 ms, 120 ms for T2 sequences
SINGLE/MULTI SLICE Around 0.02 sec for a 256x256 image, 12.4 sec for a 512 x 512 x 32 multislice set
FOV 20 - 36 cm, max. elliptical 36 x 44 cm
MEASURING MATRIX 512 x 512
MAGNET TYPE Superconducting
BORE DIAMETER
or W x H
64 cm diameter (gantry)
MAGNET WEIGHT 8,500 lbs
H*W*D 240 x 188 x 163 cm
POWER REQUIREMENTS 150A/120V-208Y/3 Phase//60 Hz/5 Wire
COOLING SYSTEM Helium for magnet, distilled/de-ionized water for coil;
CRYOGEN USE Zero boil off rate
FIELD STRENGTH 1.5 T
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• View the DATABASE results for 'Aurora® 1.5T Dedicated Breast MRI System' (2).Open this link in a new window


• View the NEWS results for 'Aurora® 1.5T Dedicated Breast MRI System' (3).Open this link in a new window.
 
Further Reading:
  Basics:
AURORA MRI System® Site Planning Guide
   by www.thorpeconstruction.com    
  News & More:
Aurora Imaging Technology Announces Approval in China
   by salesandmarketingnetwork.com    
Aurora Imaging Technology, Inc. Release: Results of a Multi-Center Trial Demonstrates Superior Diagnostic Performance of the Aurora® 1.5T Dedicated Breast MRI System Over Whole-Body Breast MRI
Monday, 1 October 2012   by www.biospace.com    
MRI Resources 
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Biograph mMR
 
From Siemens Medical Systems;
www.healthcare.siemens.com/magnetic-resonance-imaging/mr-pet-scanner/biograph-mmr FDA cleared and CE Mark 2011.
The Biograph mMR has a fully-integrated design for simultaneous PET/MRI imaging. The dedicated hardware includes solid-state, avalanche photodiode PET detector and adapted, PET-compatible MR coils.
The possibility of truly simultaneous operation allows the acquisition of several magnetic resonance imaging (MRI) sequences during the positron emission tomography (PET) scan, without increasing the examination time.


Device Information and Specification
CLINICAL APPLICATION Whole Body
CONFIGURATION Simultaneous PET/MRI
FIELD STRENGTH 3 Tesla
SURFACE COILS Full range of MRI coils
CHANNELS up to 32
PET ACQUISITION MODES 3D
MRI ACQUISITION MODES 2D/3D, spectroscopy;; iPAT, GRAPPA (k-space), noncontrast angiography, radial motion compensation
PET EFFECTIVE AXIAL FOV 26 cm (typical overlap 23%)
MRI FOV A-P 45, R-L 50, H-F 50 cm
PET RING DIAMETER 65.6 cm
BORE DIAMETER 60 cm
PATIENT SCAN RANGE 199 cm
HORIZONTAL SPEED 200 mmsec
TABLE CAPACITY 200 kg
PET DETECTOR Solid state, 4032 avalanche photo diodes
DETECTOR SCINTILLATION MATERIAL LSO, 28672 crystals
CRYSTAL SIZE 4 x 4 x 20 mm
MAGNET WEIGHT 9000 kg
DIMENSION H*W*D (gantry included) 335 x 230 x 242 cm (finshed covers)
5-GAUSS FRINGE FIELD 2.6 m / 4.6 m
MAGNET TYPE Superconducting
CRYOGEN USE Zero boil off rate, approx. 10 years
COOLING SYSTEM PET system: water; MRI system: water
SLEW RATE up to 200 T/m/s
MAX. AMPLITUDE 45 mT/m
SHIMMING Aautomatic, patient specific shim; active shim 3 linear and 5 non-linear channels (seond order)
POWER REQUIREMENTS 380 / 400 / 420 / 440 / 460 / 480 V, 3-phase + ground; Total system 110kW
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Further Reading:
  Basics:
Performance Measurements of the Siemens mMR Integrated Whole-Body PET/MR Scanner
Friday, 11 November 2011   by jnm.snmjournals.org    
Global Trends in Hybrid Imaging
Monday, 1 November 2010   by pubs.rsna.org    
  News & More:
Positron Emission Tomographic Imaging in Stroke
Monday, 28 December 2015   by www.ncbi.nlm.nih.gov    
A world's first in imaging – integrated whole-body molecular MR system available for clinical use testing
Thursday, 18 November 2010   by www.siemens.com    
FDA Clears New System to Perform Simultaneous PET, MRI Scans
Friday, 10 June 2011   by www.prnewswire.com    
Frost & Sullivan Award Underlines Siemens Healthcare's Contribution to New Product Innovation in the North American Medical Imaging Market
Wednesday, 13 July 2011   by multivu.prnewswire.com    
MRI Resources 
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Cryostat
 
Cryostats are devices for maintaining a constant low temperature (as by means of liquid helium used in MRI). They require vacuum chambers with thermal isolation.
See also Dewar, Cryoshielding and Boil off Rate.
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• View the DATABASE results for 'Cryostat' (6).Open this link in a new window

 
Further Reading:
  Basics:
Superconducting Magnets
   by mri-q.com    
Zero Boil Off Cryostats
Friday, 23 September 2011   by www.cryogenicsociety.or    
MRI Resources 
Pediatric and Fetal MRI - Veterinary MRI - Spectroscopy - MRA - Pacemaker - Libraries
 
MAGNETOM Aera
 
From Siemens Medical Systems;
www.healthcare.siemens.com/magnetic-resonance-imaging/0-35-to-1-5t-mri-scanner/magnetom-aera/ Received FDA clearance in 2010.
The MAGNETOM Aera is a patient friendly, comfortable 1.5 Tesla MRI system with advanced radio frequency chain.
The system is equipped with the Tim 4G and Dot system (Total imaging matrix + Day optimizing throughput), to enhance both productivity and image quality.
Tim 4G technology provides improved SNR. The standard system configuration of 48 radio frequency channels and 204 coil elements creates an imaging matrix that allows maximum use of coil elements at full field of view. Dot provides improved image consistency through new features like auto align, auto FoV and automatic bolus detection.


Device Information and Specification
CLINICAL APPLICATION Whole Body
CONFIGURATION Open bore
FIELD STRENGTH 1.5 Tesla
SURFACE COILS Head, spine, torso/ body coil, neurovascular, cardiac, neck, shoulder, knee, wrist, foot//ankle and multi-purpose flex coils. Peripheral vascular, breast, shoulder. Up to 60% more SNR with Tim 4G.
CHANNELS (min. / max. configuration) 48, 64
SPECTROSCOPY Yes
IMAGING TECHNIQUES iPAT, mSENSE and GRAPPA (image, k-space), noncontrast angiography, plaque imaging, radial motion compensation, Dixon, improved workflow with Dot, Caipirinha - single digit breath-holds for 3-D body imaging.
MINIMUM TR 3-D GRE: 0.95 (256 matrix)
MINIMUM TE 3-D GRE: 0.22 (256 matrix), Ultra-short TE
FOV 0.5 - 50
BORE DIAMETER
or W x H
At isocenter: L-R 70 cm, A-P (with table) 55 cm
TABLE CAPACITY 250 kg
MAGNET WEIGHT (gantry included) 3121 kg
DIMENSION H*W*D (gantry included) 145 x 231 x 219 cm
5-GAUSS FRINGE FIELD 2.5 m / 4.0 m
MAGNET TYPE Superconducting
CRYOGEN USE Zero boil off rate, approx. 10 years
COOLING SYSTEM Water
SLEW RATE up to 200 T/m/s
MAX. AMPLITUDE 33 or 45 mT/m
SHIMMING 3 linear with 20 coils, 5 nonlinear 2nd-order
POWER REQUIREMENTS 380 / 400 / 420 / 440 / 460 / 480 V, 3-phase + ground; 85 kVA
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