Magnetic Resonance - Technology Information Portal Welcome to MRI Technology
Info
  Sheets


Out-
      side
 



 
 'Claustrophobia' 
SEARCH FOR    
 
  2 3 5 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Result : Searchterm 'Claustrophobia' found in 1 term [] and 9 definitions []
previous     6 - 10 (of 10)     
Result Pages : [1]  [2]
Searchterm 'Claustrophobia' was also found in the following services: 
spacer
News  (4)  Resources  (4)  Forum  (7)  
 
Low Field MRIForum -
related threads
 
Advantages of low field imaging are the small-sized 5 Gauss fringe field and therefore the less static magnetic field exposure for the surrounding area, as well as less contraindications causing lower risks for the MRI safety by implemented metal and magnetic devices and equipment.
Low field systems are sometimes for restricted use, e.g. dedicated extremity scanner or open MRI devices. Open MRI devices equipped with permanent magnets are well-suited for MR guided interventions because these machines combine the lower magnetic fields of this type of magnets and the better patient access of open MRI scanner.
In some cases, the contrast of different tissues is better at lower field strength, depending on their T1 or T2 relaxation times. The disadvantage of the lower signal to noise ratio are a poor resolution and a longer scan time for a good image quality.
See also Claustrophobia, Contraindications and MRI Safety.

See also the related poll result: 'In 2010 your scanner will probably work with a field strength of'
spacer
 
• Related Searches:
    • MRI Safety
    • Image Contrast Characteristics
    • Permanent Magnet
    • Tesla
    • High Field MRI
 
Further Reading:
  News & More:
Low-Field MRI of Laser Polarized Noble Gas
   by xenon.unh.edu    
Searchterm 'Claustrophobia' was also found in the following services: 
spacer
Ultrasound  (1) Open this link in a new windowMarket  (2) Open this link in a new window
MAGNETOM C™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From Siemens Medical Systems;
www.medical.siemens.com A new, powerful, compact player in MRI. For both, patients and health care professionals, the mid-field has realized a giant step to cost efficient quality care. Obese patients and people with claustrophobia appreciate the comfortable side loading. The smallest pole diameter – 137 cm (54 inches) allows for optimal patient comfort.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION C-shaped open MRI
SURFACE COILS Multi channel imaging, CP Head//Neck Array Coil, Body/Spine Array Coil, large, Transmit Coil
SYNCHRONIZATION ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES SE, FLASH, FISP, IR, FIR, STIR, TrueIR/FISP, FSE, MT, SS-FSE, MT-SE, MTC, MSE, EPI, PSIF,
IMAGING MODES Single, multislice, volume study, multi angle, multi oblique
TR Min. TR 2.81 ms
TE Min. TE 0.98 ms
DISPLAY MATRIX 512 x 512 full screen display
MEASURING MATRIX 64 x 64 to 512 x 512
FOV 0.5 - 40 cm
MAGNET TYPE Permanent
BORE DIAMETER
or W x H
41 cm vertical gap distance
MAGNET WEIGHT 16000 kg
H*W*D 233 x 206 x 160 cm
FIELD STRENGTH 0.35 T
STRENGTH 24 mT/m
5-GAUSS FRINGE FIELD 2.2 m / 2.2 m
SHIMMING Passive and active
spacer

• View the DATABASE results for 'MAGNETOM C™' (2).Open this link in a new window

 
Further Reading:
  Basics:
Section 2: 510(k) Summary, MAGNETOM C! System Classification Name: Magnetic Resonance Diagnostic(.pdf)
   by www.accessdata.fda.gov    
MRI Resources 
Sequences - Anatomy - Cochlear Implant - Mobile MRI - Open Directory Project - Liver Imaging
 
MRI SafetyMRI Resource Directory:
 - Safety -
 
There are different types of contraindications that would prevent a person from being examined with an MRI scanner. MRI systems use strong magnetic fields that attract any ferromagnetic objects with enormous force. Caused by the potential risk of heating, produced from the radio frequency pulses during the MRI procedure, metallic objects like wires, foreign bodies and other implants needs to be checked for compatibility. High field MRI requires particular safety precautions. In addition, any device or MRI equipment that enters the magnet room has to be MR compatible. MRI examinations are safe and harmless, if these MRI risks are observed and regulations are followed.

Safety concerns in magnetic resonance imaging include:
the magnetic field strength;
possible 'missile effects' caused by magnetic forces;
the potential for heating of body tissue due to the application of the radio frequency energy;
the effects on implanted active devices such as cardiac pacemakers or insulin pumps;
magnetic torque effects on indwelling metal (clips, etc.);
the audible acoustic noise;
danger due to cryogenic liquids;
the application of contrast medium;


MRI Safety Guidance
It is important to remember when working around a superconducting magnet that the magnetic field is always on. Under usual working conditions the field is never turned off. Attention must be paid to keep all ferromagnetic items at an adequate distance from the magnet. Ferromagnetic objects which came accidentally under the influence of these strong magnets can injure or kill individuals in or nearby the magnet, or can seriously damage every hardware, the magnet itself, the cooling system, etc.. See MRI resources Accidents.
The doors leading to a magnet room should be closed at all times except when entering or exiting the room. Every person working in or entering the magnet room or adjacent rooms with a magnetic field has to be instructed about the dangers. This should include the patient, intensive-care staff, and maintenance-, service- and cleaning personnel, etc..
The 5 Gauss limit defines the 'safe' level of static magnetic field exposure. The value of the absorbed dose is fixed by the authorities to avoid heating of the patient's tissue and is defined by the specific absorption rate. Leads or wires that are used in the magnet bore during imaging procedures, should not form large-radius wire loops. Leg-to-leg and leg-to-arm skin contact should be prevented in order to avoid the risk of burning due to the generation of high current loops if the legs or arms are allowed to touch. The patient’s skin should not be in contact with the inner bore of the magnet.
The outflow from cryogens like liquid helium is improbable during normal operation and not a real danger for patients.
The safety of MRI contrast agents is tested in drug trials and they have a high compatibility with very few side effects. The variations of the side effects and possible contraindications are similar to X-ray contrast medium, but very rare. In general, an adverse reaction increases with the quantity of the MRI contrast medium and also with the osmolarity of the compound.
See also 5 Gauss Fringe Field, 5 Gauss Line, Cardiac Risks, Cardiac Stent, dB/dt, Legal Requirements, Low Field MRI, Magnetohydrodynamic Effect, MR Compatibility, MR Guided Interventions, Claustrophobia, MRI Risks and Shielding.
Radiology-tip.comRadiation Safety,  Ionizing Radiation
spacer
Radiology-tip.comUltrasound Safety,  Absorbed Dose
spacer

• View the DATABASE results for 'MRI Safety' (42).Open this link in a new window


• View the NEWS results for 'MRI Safety' (13).Open this link in a new window.
 
Further Reading:
  Basics:
MRI Safety
2001   by www.fda.gov    
Contrast Agents: Safety Profile
   by www.clinical-mri.com    
  News & More:
Newer Heart Devices Safe During MRI
Monday, 23 August 2004   by www.hospimedica.com    
Modern Implantable Heart Devices Safe For Use In MRI Scans
Wednesday, 16 March 2005   by www.sciencedaily.com    
Searchterm 'Claustrophobia' was also found in the following services: 
spacer
News  (4)  Resources  (4)  Forum  (7)  
 
Signa OpenSpeed™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From GE Healthcare;
www.gehealthcare.com/usen/mr/open_speed/index.html a friendly and less confining appearance targets the 7% of individuals who refuse to have an MRI because of claustrophobia. This open MRI system is also up to three times faster than other scanners, therefore the Signa OpenSpeed™ reducing exam time and scheduling issues. In addition, a swing table provides better access and supports up to 500 pounds.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Open MRI
SURFACE COILS Integrated transmit and receive body coil;; 4 channel head array, 8 channel CTL array, 2 channel shoulder array, 3 channel large extremity array, 3 channel small extremity array, 4 channel foot array, 3 channel wrist array, 4 channel breast array
SPECTROSCOPY No
SYNCHRONIZATION Standard cardiac gating, ECG/peripheral, respiratory gating
PULSE SEQUENCES Standard: SE, IR, 2D/3D GRE and SPGR, Angiography: 2D/3D TOF, 2D/3D Phase Contrast;; 2D/3D FSE, 2D/3D FGRE and FSPGR, SSFP, FLAIR, EPI, optional: 2D/3D Fiesta, FGRET, Spiral, Tensor
IMAGING MODES Localizer, single slice, multislice, volume, fast, POMP, multi slab, cine
TR 1.3 to 12000 msec in increments of 1 msec
TE 0.4 to 2000 msec in increments of 1 msec
SINGLE/MULTI SLICE Simultaneous scan and reconstruction;; 100 images/second with Reflex 100
FOV 1cm to 40 cm continuous
SLICE THICKNESS 2D: 0.8mm - 20mm 3D: 0.1mm - 20mm
DISPLAY MATRIX 1280 x 1024
MEASURING MATRIX 128x512 steps 32 phase//freq.
PIXEL INTENSITY 256 gray levels
SPATIAL RESOLUTION 0.08 mm; 0.02 mm optional
MAGNET TYPE Superconducting
BORE DIAMETER
or W x H
175 x 85 x 447 cm
MAGNET WEIGHT 8256 kg
H*W*D 530 x 175 x 250 cm
POWER REQUIREMENTS 200 - 480, 3-phase
COOLING SYSTEM TYPE Liquid helium
CRYOGEN USE 0.03 L/hr, holds 300 L
FIELD STRENGTH 0.7 T
STRENGTH 25 mT/m
5-GAUSS FRINGE FIELD 4.7 m/ 3.8 m
SHIMMING Computerized passive shimming during magnet setup, autoshim per series with automatic table motion to magnet isocenter for each prescription
spacer

• View the DATABASE results for 'Signa OpenSpeed™' (2).Open this link in a new window

 
Further Reading:
  News & More:
MR Surgical Suite, Improving surgical procedure quality (.pdf)
   by www3.gehealthcare.com    
Searchterm 'Claustrophobia' was also found in the following services: 
spacer
Ultrasound  (1) Open this link in a new windowMarket  (2) Open this link in a new window
Signa Profile™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From GE Healthcare;
www.gehealthcare.com/usen/mr/profilei/index.html the New Signa Profile/i is a patient friendly open MRI system that virtually eliminates patient anxiety and claustrophobia, without compromising diagnostic utility.
Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Open MRI
SURFACE COILS Integrated transmit body coil, body flex sizes: M, L, XL, quadrature, head coil quadrature, 4 channel neurovascular array, 8 channel CTL array, quad. c-spine, 2 channel shoulder array, extremity coil, 3 channel wrist array, 4 channel breast array, 6, 9, 11 inch general purpose loop coils
SPECTROSCOPY No
SYNCHRONIZATION Standard cardiac gating, ECG/peripheral, respiratory gating
PULSE SEQUENCES Standard: SE, IR, 2D/3D GRE and SPGR, Angiography: 2D/3D TOF, 2D/3D phase contrast;; 2D/3D FSE, 2D/3D FRFSE, FGRE and FSPGR, SSFP, FLAIR, EPI, optional: 2D/3D Fiesta, fat/water separation, T1 FLAIR
IMAGING MODES Localizer, single slice, multislice, volume, fast, POMP, multi slab, cine, slice and frequency zip, extended dynamic range, tailored RF
TR 6 to 12000 msec in increments of 1 msec
TE 1.3 to 2000 msec in increments of 1 msec
SINGLE/MULTI SLICE Simultaneous scan and reconstruction;; 80 images/second reconstruction
FOV 3cm to 40 cm continuous
SLICE THICKNESS 2D: 2.7mm - 20mm 3D: 0.2mm - 5mm
DISPLAY MATRIX 1280 x 1024
MEASURING MATRIX 128x512 steps 32 phase//freq.
PIXEL INTENSITY 256 gray levels
SPATIAL RESOLUTION 0.08 mm; 0.02 mm optional
MAGNET TYPE Permanent
BORE DIAMETER
or W x H
120 x 44 cm
MAGNET WEIGHT 10,000 kg w/gradient enclosure
H*W*D 147 x 214 x 193 cm
POWER REQUIREMENTS 200 - 480, 3-phase
COOLING SYSTEM TYPE None required
CRYOGEN USE
FIELD STRENGTH 0.2 T
STRENGTH 15 mT/m
5-GAUSS FRINGE FIELD 1.7 m/1.7 m
spacer

• View the DATABASE results for 'Signa Profile™' (2).Open this link in a new window

MRI Resources 
Libraries - MRCP - Raman Spectroscopy - Societies - Developers - Contrast Enhanced MRI
 
previous      6 - 10 (of 10)     
Result Pages : [1]  [2]
 Random Page
 
Share This Page
FacebookTwitterLinkedIn

MR-TIP    
Community   
User
Pass
Forgot your UserID/Password ?  



Your new MRI scanner in 2020 will be shipped from :
China 
Europe 
India 
Japan 
USA 
other 

Look
      Ups





Magnetic Resonance - Technology Information Portal
Member of SoftWays' Medical Imaging Group - MR-TIP • Radiology-TIP • US-TIP • The-Medical-Market
Copyright © 2003 - 2014 SoftWays. All rights reserved. [ 30 September 2014]
Terms of Use | Privacy Policy | Advertising
 [last update: 2014-09-28 05:33:09]