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Searchterm 'ffe' was also found in the following services: 
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News  (436)  Resources  (66)  Forum  (134)  
 
Motion Compensation Pulse SequencesInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
Pulse sequences, designed to be insensitive to flow, e.g. at every even echo, a spin echo sequence is not flow sensitive. Velocity compensation is achieved by using gradients, which are either symmetrical around a 180° pulse and switched on twice as is the case for motion compensated spin echo pulse sequences, or two antisymmetrical gradient lobes without 180° pulse, which is the way to produce a velocity compensated gradient echo pulse sequence.
The signal of the second echo (and all other even echoes) is independent of the velocity of the object. Thus, velocity-based motion effects stemming from the entire voxel or from spins within a voxel (intravoxel incoherent motion) are suppressed with such pulse sequences.
If higher order motion is relevant, as it may be in turbulent jets across valves, acceleration and jerk effects can also be compensated for by the use of appropriate combinations of gradient- and radio frequency pulses.
With the increasingly stronger gradients, echo times in MR systems can be shortened to the point at which effects other than velocity effects hardly ever become relevant.
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Further Reading:
  News & More:
Patient movement during MRI: Additional points to ponder
Tuesday, 5 January 2016   by www.healthimaging.com    
Motion-compensation of Cardiac Perfusion MRI using a Statistical Texture Ensemble(.pdf)
June 2003   by www.imm.dtu.dk    
MRI Resources 
Databases - Spectroscopy pool - Fluorescence - Online Books - MRCP - Societies
 
Negative Oral Contrast AgentsForum -
related threadsInfoSheet: - Contrast Agents - 
Intro, Overview, 
Characteristics, 
Types of, 
etc.MRI Resource Directory:
 - Contrast Agents -
 
Categories of negative oral contrast agents:
Negative oral contrast media are usually based on superparamagnetic particles and act by inducing local field inhomogeneities, which results in shortening of both T1 and T2 relaxation times. Superparamagnetic contrast agents have predominant T2 weighted effects. Biphasic contrast media are agents that have different signal intensities on different sequences, depending on the concentration at which they are used.
Suitable materials for oral contrast agents should have little or no absorption by the stomach or intestines, complete excretion, no motion or susceptibility artifacts, affordability, and uniform marking of the gastrointestinal tract. Benefits of negative oral contrast agents are the reduction of ghosting artifacts caused by the lack of signal. Superparamagnetic iron oxides produce also in low concentrations a noticeable signal loss; but can generate susceptibility artifacts especially in gradient echo sequences. Perfluorochemicals do not dilute in the bowel because they are not miscible with water.
High cost, poor availability, and limited evaluations of side effects are possible disadvantages.
Negative oral contrast agents are used e.g., in MRCP, where the ingestion of 600-900 ml of SPIO cancels out the signal intensity of the lumen (in addition after the injection of a gadolinium-based contrast medium, the enhancement of the inflammatory tissues is clearer seen), and in MR abdominal imaging of Crohn's disease in combination with mannitol.
mri safety guidance
Contrast Guidance
Blueberry or pineapple juices are useable for examinations of the pancreas (MRCP, upper abdominal imaging) as cheep contrast agents, because of the content of magnetic substances (e.g. manganese).

See also Ferristene, Ferumoxsil, Oral Magnetic Particles, Gastrointestinal Imaging.
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Further Reading:
  Basics:
Components of Oral Contrast Agent for Magnetic Resonance Imaging(.pdf)
   by www.ffcr.or.jp    
MRI Resources 
Mass Spectrometry - Mobile MRI Rental - Colonography - Portals - MRI Training Courses - General
 
Panorama 0.23T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/main/products/mri/products/panoramafamily/panorama0.23t_rt/features/ From Philips Medical Systems;
the Panorama 0.23 T, providing a new design optimized for patient comfort, faster reconstruction time than before (300 images/second) and new gradient specifications. Philips' Panorama 0.23 T I/T supports MR-guided interventions, resulting in minimally invasive procedures, more targeted surgery, reduced recovery time and shorter hospital stays. Optional OptoGuide functionality enables real-time needle tracking. Philips' Panorama 0.23 TPanorama 0.2 R/T is the first and only open MRI system to enable radiation therapy planning using MR data sets. The Panorama also features the new and consistent Philips User Interface, an essential element of the Vequion clinical IT family of products and services.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Open MRI/C-arm
Head, head-neck, extremity M-L, neck, body/spine S-XL, shoulder, bilateral breast, wrist, TMJ, flex XS-S-M-L-XL-XXL
SYNCHRONIZATION
ECG/peripheral: Optional/optional, respiratory gating
PULSE SEQUENCES
SE, FE, IR, FFE, DEFFE, DESE, TSE, DETSE, Single shot SE, DRIVE, Balanced FFE, MRCP, Fluid Attenuated Inversion Recovery, Turbo FLAIR, IR-TSE, T1-STIR TSE, T2-STIR TSE, Diffusion Imaging, 3D SE, 3D FFE, MTC;; Angiography: CE-ANGIO, MRA 2D, 3D TOF
IMAGING MODES
Single, multislice, volume study, dynamic, SIMEX, multi chunk 3D, multiple stacks
TR
Min. 6.2 msec
TE
Min. 2.8 msec
SINGLE/MULTI SLICE
50 slices/sec
0.4 cm - 40 cm
1280 X 1024
MEASURING MATRIX
Up to 512 x 512
PIXEL INTENSITY
256 gray scale
MAGNET TYPE
Resistive/iron core
Open x 46 cm x infinite (side-first patient entry)
MAGNET WEIGHT
13110 kg
H*W*D
196 x 121 x 176 cm
POWER REQUIREMENTS
400/480 V
COOLING SYSTEM TYPE
Closed loop chilled water (chiller included)
N/A
STRENGTH
19 mT/m
5-GAUSS FRINGE FIELD
2.4 m / 3.7 m
Passive/active
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• View the DATABASE results for 'Panorama 0.23T™' (2).Open this link in a new window

 
Further Reading:
  News & More:
Magnetic resonance imaging guided musculoskeletal interventions at 0.23T: Chapter 4. Materials and methods
2002
Searchterm 'ffe' was also found in the following services: 
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News  (436)  Resources  (66)  Forum  (134)  
 
Panorama 0.6TPanorama 0.2InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/main/products/mri/products/panoramafamily/panorama0.23t_rt/features/ From Philips Medical Systems;
Panorama 0.6 T is the Philips Mid-Field Open MRI system. It is the most open MR scanner in the market, optimized for patient comfort and faster reconstruction time.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Open MRI/C-arm
Head, head-neck, extremity, neck, body/spine M-XL, shoulder, bilateral breast, wrist, TMJ, flex XS-S-M-L-XL-XXL
SYNCHRONIZATION
ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES
SE, FE, IR, STIR, FFE, DEFFE, DESE, TSE, DETSE, Single shot SE, DRIVE, Balanced FFE, MRCP, Fluid Attenuated Inversion Recovery, Turbo FLAIR, IR-TSE, T1-STIR TSE, T2-STIR TSE, Diffusion Imaging, 3D SE, 3D FFE, Contrast Perfusion Analysis, MTC;; Angiography: CE-ANGIO, MRA 2D, 3D TOF
IMAGING MODES
Single, multislice, volume study, dynamic, SIMEX, multi chunk 3D, multiple stacks
TR
Min. 4.6 msec
TE
Min. 2.3 msec
SINGLE/MULTI SLICE
50 slices/sec
0.4 cm - 42 cm
1280 X 1024
MEASURING MATRIX
Up to 512 x 512
PIXEL INTENSITY
256 gray scale
MAGNET TYPE
Superconducting / iron core
Open x 47 cm x infinite (side-first patient entry)
MAGNET WEIGHT
38000 kg
H*W*D
254 x 244 x 325 cm
POWER REQUIREMENTS
400/480 V
COOLING SYSTEM TYPE
Liquid helium//air cool
0.00 L/hr helium
STRENGTH
20 mT/m
5-GAUSS FRINGE FIELD
2.4 m / 2.5 m
Passive/active
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• View the DATABASE results for 'Panorama 0.6T™' (2).Open this link in a new window

MRI Resources 
Safety pool - Shielding - Jobs pool - Breast Implant - Sequences - MRI Technician and Technologist Schools
 
Panorama 1.0T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/main/products/mri/products/panoramafamily/panorama1.0t_rt/features/ From Philips Medical Systems;
this active shielded member of the Panorama product line combines the advantages of one 1.0 T system's with the possibilities of an open MRI system. The open design helps ease anxiety for claustrophobic patients and increased patient comfort whereby the field strength provides spectacular image quality and fast patient throughput.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Vertical Field open MRI post design
Vertically opposed solenoids, head, head-neck, extremity, neck, body/spine M-XL, shoulder, bilateral breast, wrist, TMJ, flex XS-S-M-L-XL-XXL
SYNCHRONIZATION
ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES
SE, FE, IR, STIR, FFE, DEFFE, DESE, TSE, DETSE, Single shot SE, DRIVE, Balanced FFE, MRCP, FLAIR, Turbo FLAIR, IR-TSE, T1-STIR TSE, T2-STIR TSE, Diffusion Imaging, 3D SE, 3D FFE, Contrast Perfusion Analysis, MTC;; Angiography: CE-ANGIO, MRA 2D, 3D TOF
IMAGING MODES
Single, multislice, volume study, dynamic, SIMEX, multi chunk 3D, multiple stacks
TR
Min. 4.6 msec
TE
Min. 2.3 msec
SINGLE/MULTI SLICE
50 slices/sec
0.4 cm - 42 cm
1280 X 1024
MEASURING MATRIX
Up to 512 x 512
PIXEL INTENSITY
256 gray scale
Open x 47 cm x infinite (side-first patient entry)
MAGNET WEIGHT
H*W*D
POWER REQUIREMENTS
400/480 V
COOLING SYSTEM TYPE
Liquid helium
STRENGTH
20 mT/m
5-GAUSS FRINGE FIELD
Passive/active
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• View the DATABASE results for 'Panorama 1.0T™' (2).Open this link in a new window

MRI Resources 
Open Directory Project - Shoulder MRI - Shielding - - Collections - Service and Support
 
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