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Result : Searchterm 'Pulse Sequence' found in 5 terms [] and 166 definitions []
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MRI Resources 
Pacemaker - Quality Advice - Manufacturers - Mobile MRI Rental - Fluorescence - Spine MRI
 
AIRIS IIā„¢InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.hitachimed.com/products/airis_2.asp From Hitachi Medical Systems America Inc.;
the AIRIS II, an entry in the diagnostic category of open MR systems, was designed by Hitachi Medical Systems America Inc. (Twinsburg, OH, USA) and Hitachi Medical Corp. (Tokyo) and is manufactured by the Tokyo branch. A 0.3 T field-strength magnet and phased array coils deliver high image quality without the need for a tunnel-type high-field system, thereby significantly improving patient comfort not only for claustrophobic patients.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Vertical Field, Open MRI
QD Head, MA Head and Neck, QD C-Spine, MA or QD Shoulder, MA CTL Spine, QD Knee, Neck, QD TMJ, QD Breast, QD Flex Body (4 sizes), Small and Large Extrem., QD Wrist, MA Foot and Ankle (WIP), PVA (WIP)
SYNCHRONIZATION
Cardiac gating, ECG/peripheral, respiratory gating (2 modes)
PULSE SEQUENCES
SE, GE, GR, IR, FIR, STIR, FSE, ss-FSE, FLAIR, EPI -DWI, SE-EPI, ms - EPI, SSP, MTC, SARGE, RSSG, TRSG, MRCP, Angiography: CE, 2D/3D TOF
IMAGING MODES
Single, multislice, volume study
TR
SE: 30 - 10,000msec GE: 20 - 10,000msec IR: 50 - 16,700msec FSE: 200 - 16,7000msec
TE
SE : 10 - 250msec IR: 10 -250msec GE: 5 - 50 msec FSE: 15 - 2,000
SINGLE/MULTI SLICE
0.05 sec/image (256 x 256)
FOV
5cm to 42 cm continuous
2D: 2 - 100 mm; 3D: 0.5 - 5 mm
1280 x 1024
MEASURING MATRIX
512 x 512
PIXEL INTENSITY
Level Range: -2,000 to +4,000
Sub millimeter
MAGNET TYPE
Self-shielded, permanent
BORE DIAMETER
or W x H
110 x 43 cm
MAGNET WEIGHT
15,700 kg
H*W*D
79 x 111 x 73 cm
POWER REQUIREMENTS
208/220/240 V, single phase
COOLING SYSTEM TYPE
Air-cooled
STRENGTH
15 mT/m
2.0 m lateral, 2.5 m vert./long
Auto shimming, 3-axis/patient, and volume shim
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• Related Searches:
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    • Hardware
    • Open MRI
    • Coil
MRI Resources 
Fluorescence - Intraoperative MRI - Quality Advice - MRI Physics - Raman Spectroscopy - Jobs
 
ARTOSCANā„¢ - MInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.gemedicalsystems.com/rad/mri/products/artoscan/specs.html Developed by GE Lunar; the ARTOSCANā„¢-M is designed specifically for in-office musculoskeletal imaging. ARTOSCAN-M's compact, modular design allows placing within a clinical environment, bringing MRI to the patient. Patients remain outside the magnet at all times during the examinations, enabling constant patient-technologist contact. ARTOSCAN-M requires no special RF room, magnetic shielding, special power supply or air conditioning.
The C-SCANā„¢ (also known as Artoscan C) is developed from the ARTOSCANā„¢ - M, with a new computer platform.
Device Information and Specification
CLINICAL APPLICATION
Dedicated extremity
CONFIGURATION
Closed
Linear and dual phased array coil, knee, ankle, wrist coils
PULSE SEQUENCES
SE, GE, IR, STIR, FSE, 3D CE, GE-STIR, 3D GE, ME, TME, HSE
IMAGING MODES
Single, multislice, volume study, fast scan, multi slab, cine
TR
12 - 5,000 msec
TE
5 - 220 msec
SINGLE SLICE
0.8 sec/image
MULTISLICE
0.8 sec/image
FOV
10 - 20 cm
SLICE THICKNESS
2D: 2 mm - 10 mm;
3D: 0.6 mm - 10 mm
512 x 512
MEASURING MATRIX
256 x 256 maximum
PIXEL INTENSITY
4,096 gray lvls, 256 lvls in 3D
MAGNET TYPE
Ferrite Permanent
MAGNET WEIGHT
965 kg
POWER REQUIREMENTS
100/110/200/220/230/240V
STRENGTH
10 mT/m
5 GAUSS FRINGE FIELD, radial/axial
28 cm/60 cm
Passive
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• View the DATABASE results for 'ARTOSCAN™ - M' (3).Open this link in a new window

MRI Resources 
Devices - Stimulator pool - Software - Liver Imaging - Education - Diffusion Weighted Imaging
 
Altaireā„¢InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.hitachimed.com/products/altaire.asp From Hitachi Medical Systems America, Inc.;
the AIRIS made its debut in 1995. Hitachi followed up with the AIRIS II system, which has proven equally successfully. 'All told, Hitachi has installed more than 1,000 MRI systems in the U.S., holding more than 17 percent of the total U.S. MRI installed base, and more than half of the installed base of open MR systems,' says Antonio Garcia, Frost and Sullivan industry research analyst. Now Altaire employs a blend of innovative Hitachi features called VOSIā„¢ technology, optimizing each sub-system's performance in concert with the other sub-systems, to give the seamless mix of high-field performance and the patient comfort, especially for claustrophobic patients, of open MR systems.

Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Vertical Field, Open MRI
DualQuad T/R Body Coil, MA Head, MA C-Spine, MA Shoulder, MA Wrist, MA CTL Spine, MA Knee, MA TMJ, MA Flex Body (3 sizes), Neck, small and large Extremity, PVA (WIP), Breast (WIP), Neurovascular (WIP), Cardiac (WIP) and MA Foot//Ankle (WIP)
SYNCHRONIZATION
Cardiac gating, ECG/peripheral, respiratory gating (2 modes)
PULSE SEQUENCES
SE, GE, GR, IR, FIR, STIR, ss-FSE, FSE, DE-FSE/FIR, FLAIR, ss/ms-EPI, ss/ms EPI- DWI, SSP, MTC, SE/GE-EPI, MRCP, SARGE, RSSG, TRSG, BASG, Angiography: CE, PC, 2D/3D TOF
IMAGING MODES
Single, multislice, volume study
TR
SE: 30 - 10,000msec GE: 3.6 - 10,000msec IR: 50 - 16,700msec FSE: 200 - 16,7000msec
TE
SE : 8 - 250msec IR: 5.2 -7,680msec GE: 1.8 - 2,000 msec FSE: 5.2 - 7,680
SINGLE/MULTI SLICE
0.05 sec/image (256 x 256)
FOV
5cm to 45 cm continuous
2D: 2 - 100 mm; 3D: 0.5 - 5 mm
1280 x 1024
MEASURING MATRIX
512 x 512
PIXEL INTENSITY
Level Range: -2,000 to +4,000
Sub millimeter
MAGNET TYPE
Self-shielded, superconducting
BORE DIAMETER
or W x H
110 x 43 cm
MAGNET WEIGHT
41,700 kg
H*W*D
256 x 348 x 236 cm
POWER REQUIREMENTS
208 V +/- 10%, 3 phase
COOLING SYSTEM TYPE
Water-cooled
STRENGTH
22 mT/m
3.1 m lateral, 3.6 m vertical
Auto shimming, 3-axis/patient and active shimming
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• View the DATABASE results for 'Altaire™' (2).Open this link in a new window

 
Further Reading:
  News & More:
Altaire High-Field Open MRI(.pdf)
2001
MRI Resources 
Lung Imaging - Mobile MRI Rental - Education - Coils - Non-English - Cardiovascular Imaging
 
Annotation
 
A description of the factors used in creating an image should include the type and times of the pulse sequence, the number of signals averaged or added (NSA), the size of the reconstructed region, the size of the acquisition matrix in each direction, field of view and the slice thickness; usually printed at the border of MRI pictures.
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MRI Resources 
Shielding - Brain MRI - MR Guided Interventions - Jobs - Raman Spectroscopy - Used and Refurbished MRI Equipment
 
ArtifactForum -
related threadsInfoSheet: - Artifacts - 
Case Studies, 
Reduction Index, 
etc.MRI Resource Directory:
 - Artifacts -
 
An image artifact is a structure not normally present but visible as a result of a limitation or malfunction in the hardware or software of the MRI device, or in other cases a consequence of environmental influences as heat or humidity or it can be caused by the human body (blood flow, implants etc.). The knowledge of MRI artifacts (brit. artefacts) and noise producing factors is important for continuing maintenance of high image quality. Artifacts may be very noticeable or just a few pixels out of balance but can give confusing artifactual appearances with pathology that may be misdiagnosed.
Changes in patient position, different pulse sequences, metallic artifacts, or other imaging variables can cause image distortions, which can be reduced by the operator; artifacts due to the MR system may require a service engineer.
Many types of artifacts may occur in magnetic resonance imaging. Artifacts in magnetic resonance imaging are typically classified as to their basic principles, e.g.:
ā€¢
Physiologic (motion, flow)
ā€¢
Hardware (electromagnetic spikes, ringing)
ā€¢
Inherent physics (chemical shift, susceptibility, metal)

Several techniques are developed to reduce these artifacts (e.g. respiratory compensation, cardiac gating, eddy current compensation) but sometimes these effects can also be exploited, e.g. for flow measurements.

See also the related poll result: 'Most outages of your scanning system are caused by failure of'
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• View the DATABASE results for 'Artifact' (166).Open this link in a new window

 
Further Reading:
  Basics:
ARTEFACT VERSUS ARTIFACT
Saturday, 26 January 2002   by www.worldwidewords.org    
  News & More:
MRI results affected by movement? MIT researchers have an AI-powered solution
Friday, 25 August 2023   by healthimaging.com    
Magnetic eyelashes: A new source of MRI artifacts
Wednesday, 24 July 2019   by medicalxpress.com    
On the Horizon - Next Generation MRI
Wednesday, 23 October 2013   by thefutureofthings.com    
MRI Resources 
Safety pool - Education pool - Non-English - Research Labs - Spectroscopy pool - Safety Training
 
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