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Result : Searchterm 'Diffusion' found in 8 terms [] and 36 definitions []
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News  (29)  Resources  (8)  Forum  (13)  
 
High Field MRI
 
The principal advantage of MRI at high field is the increase in signal to noise ratio. This can be used to improve anatomic and/or temporal resolution and reduce scan time while preserving image quality. MRI devices for whole body imaging for human use are available up to 3 tesla (3T). Functional MRI (fMRI) and MR spectroscopy (MRS) benefit significantly. In addition, 3T machines have a great utility in applications such as TOF MRA and DTI. Higher field strengths are used for imaging of small parts of the body or scientific animal experiments. Higher contrast may permit reduction of gadolinium doses and, in some cases, earlier detection of disease.
Using high field MRI//MRS, the RF-wavelength and the dimension of the human body complicating the development of MR coils. The absorption of RF power causes heating of the tissue. The energy deposited in the patient's tissues is fourfold higher at 3T than at 1.5T. The specific absorption rate (SAR) induced temperature changes of the human body are the most important safety issue of high field MRI//MRS.
Susceptibility and chemical shift dispersion increase like T1, therefore high field MRI occasionally exhibits imaging artifacts. Most are obvious and easily recognized but some are subtle and mimic diseases. A thorough understanding of these artifacts is important to avoid potential pitfalls. Some imaging techniques or procedures can be utilized to remove or identify artifacts.
See also Diffusion Tensor Imaging.

See also the related poll result: 'In 2010 your scanner will probably work with a field strength of'
Radiology-tip.comMagnetic Resonance Guided Focused Ultrasound,  High Intensity Focused Ultrasound
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• Related Searches:
    • Low Field MRI
    • Open MRI
    • Signal to Noise Ratio
    • Signal Intensity
    • Device
 
Further Reading:
  Basics:
CLINICAL WHOLE BODY MRI AT 3.0 T(.pdf)
2001
Dealing with Increased MRI Field Strength
Tuesday, 1 October 2013   by www.evaluationengineering.com    
Musculoskeletal MRI at 3.0 T: Relaxation Times and Image Contrast
Sunday, 1 August 2004   by www.ajronline.org    
  News & More:
Ultra-high-field MRI reveals language centres in the brain in much more detail
Tuesday, 28 October 2014   by medicalxpress.com    
Vascular Filters of Functional MRI: Spatial Localization Using BOLD and CBV Contrast
High-Resolution, Spin-Echo BOLD, and CBF fMRI at 4 and 7 T(.pdf)
October 2002   by otg.downstate.edu    
Turbo-FLASH Based Arterial Spin Labeled Perfusion MRI at 7 T
Thursday, 20 June 2013   by www.plosone.org    
Searchterm 'Diffusion' was also found in the following services: 
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Intera 0.5T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From Philips Medical Systems; www.medical.philips.com/de/products/mri/products/ this low field MRI system of the Intera-family is onto diagnostic safety and flexibility aligned - cost effective and with high patient acceptance.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Short bore compact
SURFACE COILS Standard: head, body, C1, C3; Optional: Small joint, flex-E, flex-R, endocavitary (L and S), dual TMJ, knee, neck, T/L spine, breast; Optional phased array: Spine, pediatric, 3rd party connector, Flex-S-M-L, flex body, flex cardiac, neuro-vascular, head
SPECTROSCOPY No
SYNCHRONIZATION ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES SE, Modified-SE (TSE), DAVE, STIR, FLAIR, SPIR, MTC, Dynamic, Keyhole, CLEAR, Q Flow, Balanced FFE, Multi Chunk 3D, Multi Stack 3D, FFE-EPI, SE-EPI, IR-EPI, GRASE, Diffusion Imaging, Perfusion Imaging;; Angiography: Inflow MRA, TONE, PCA, CE MRA
IMAGING MODES Single Slice 2D , Multi Single Slice 2D, Multi Slice 2D, 3D, Multi Chunk 3D, Multi Stack 3D
TR Min. 2.9 (Omni) msec
TE Min. 1.0 (Omni) msec
SINGLE/MULTI SLICE RapidView Recon. greater than 500 @ 256 Matrix
FOV Max. 53 cm
SLICE THICKNESS 0.1 mm (Omni)
DISPLAY MATRIX 128 x 128, 256 x 256,512 x 512,1024 x 1024
MEASURING MATRIX Variable in 1% increments
PIXEL INTENSITY Lum.: 120 cd/m2; contrast: 150:1
SPATIAL RESOLUTION Variable (op. param. depend.)
MAGNET TYPE Superconducting
BORE DIAMETER
or W x H
60 x 60 cm
MAGNET WEIGHT 2500 kg
H*W*D 240 x 188 x 157 cm
POWER REQUIREMENTS 380/400 V
COOLING SYSTEM TYPE
CRYOGEN USE 0.03 L/hr helium
FIELD STRENGTH 0.5 T
STRENGTH 23 mT/m (Omni)
5-GAUSS FRINGE FIELD 2.1 m / 2.8 m
SHIMMING Passive and dynamic
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• View the DATABASE results for 'Intera 0.5T™' (2).Open this link in a new window

MRI Resources 
Safety pool - Databases - Resources - Shoulder MRI - MRI Accidents - Anatomy
 
Intera 1.5T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From Philips Medical Systems;
www.medical.philips.com/de/products/mri/products/ the Intera-family offers with this member a wide range of possibilities, efficiency and a ergonomic and intuitive serving-platform. Also available as Intera CV for cardiac and Intera I/T for interventional MR procedures.
The scanners are also equipped with SENSE technology, which is essential for high-quality contrast enhanced magnetic resonance angiography, interactive cardiac MR and diffusion tensor imaging (DTI) fiber tracking.
The increased accuracy and clarity of MR scans obtained with this technology allow for faster and more accurate diagnosis of potential problems like patient friendliness and expands the breadth of applications including cardiology, oncology and interventional MR.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Short bore compact
SURFACE COILS Standard: head, body, C1, C3; Optional: Small joint, flex-E, flex-R, endocavitary (L and S), dual TMJ, knee, neck, T/L spine, breast; Optional phased array: Spine, pediatric, 3rd party connector; Optional SENSE coils: Flex-S-M-L, flex body, flex cardiac
SPECTROSCOPY Optional
SYNCHRONIZATION ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES SE, Modified-SE (TSE), IR (T1, T2, PD), STIR, FLAIR, SPIR, FFE, T1-FFE, T2-FFE, Balanced FFE, TFE, Balanced TFE, Dynamic, Keyhole, 3D, Multi Chunk 3D, Multi Stack 3D, K Space Shutter, MTC, TSE, Dual IR, DRIVE, EPI, Cine, 2DMSS, DAVE, Mixed Mode; Angiography: PCA, MCA, Inflow MRA, CE
IMAGING MODES Single Slice 2D , Multi Single Slice 2D, Multi Slice 2D, 3D, Multi Chunk 3D, Multi Stack 3D
TR 2.9 (Omni), 1.6 (Power), 1.6 (Master/Expl) msec
TE 1.0 (Omni), 0.7 (Power), 0.5 (Master/Expl) msec
SINGLE/MULTI SLICE RapidView Recon. greater than 500 @ 256 Matrix
FOV Max. 53 cm
SLICE THICKNESS 0.1 mm(Omni), 0.05 mm (Pwr/Mstr/Expl)
DISPLAY MATRIX 128 x 128, 256 x 256,512 x 512,1024 x 1024 (64 for BOLD img.)
MEASURING MATRIX Variable in 1% increments
PIXEL INTENSITY Lum.: 120 cd/m2; contrast: 150:1
SPATIAL RESOLUTION Variable (op. param. depend.)
MAGNET TYPE Superconducting
BORE DIAMETER
or W x H
60 cm diameter (patient)
MAGNET WEIGHT 2900 kg
H*W*D 240 x 188 x 157 cm
POWER REQUIREMENTS 380/400 V
COOLING SYSTEM TYPE
CRYOGEN USE 0.03 L/hr helium
FIELD STRENGTH 1.5 T
STRENGTH 30 mT/m
5-GAUSS FRINGE FIELD 2.4 m / 3.8 m
SHIMMING Passive and dynamic
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• View the DATABASE results for 'Intera 1.5T™' (2).Open this link in a new window

Searchterm 'Diffusion' was also found in the following services: 
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News  (29)  Resources  (8)  Forum  (13)  
 
Intera 3.0T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From Philips Medical Systems;
www.medical.philips.com/de/products/mri/products/ the Intera 3 T high field system, the first with a compact magnet, which is built on the same platform as the 1.5 T, is targeted to high-end neurological, orthopedic and cardiovascular imaging applications with maximum patient comfort and acceptance without compromising image quality and clinical performance. Useable for clinical routine and research. The Intera systems offer diffusion tensor imaging (DTI) fiber tracking that measures movement of water in the brain and can therefore detect areas of the brain where normal movement of water is disrupted.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Short bore compact
SURFACE COILS Standard: head, body, C1, C3; Optional: Small joint, flex-E, flex-R, endocavitary (L and S), dual TMJ, knee, neck, T/L spine, breast; Optional phased array: spine;; Optional SENSE coils: Flex body, flex cardiac, neuro-vascular, head
SPECTROSCOPY Optional
SYNCHRONIZATION ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES SE, Modified-SE, IR (T1, T2, PD), STIR, FLAIR, SPIR, FFE, T1-FFE, T2-FFE, Balanced FFE, TFE, Balanced TFE, Dynamic, Keyhole, 3D, Multi Chunk 3D, Multi Stack 3D, K Space Shutter, MTC, TSE, Dual IR, DRIVE, EPI, Cine, 2DMSS, DAVE, Mixed Mode; Angiography: Inflow MRA, TONE, PCA, CE MRA
IMAGING MODES Single Slice 2D , Multi Single Slice 2D, Multi Slice 2D, 3D, Multi Chunk 3D, Multi Stack 3D
TR Min. 1.6 (Master) msec
TE Min. 0.5 (Master) msec
SINGLE/MULTI SLICE RapidView Recon. greater than 500 @ 256 Matrix
FOV Max. 53 cm
SLICE THICKNESS 0.1 mm (Omni), 0.05 mm (Power)
DISPLAY MATRIX 128 x 128, 256 x 256,512 x 512,1024 x 1024 (64 for Bold img)
MEASURING MATRIX Variable in 1% increments
PIXEL INTENSITY Lum.: 120 cd/m2; contrast: 150:1
SPATIAL RESOLUTION Variable (op. param. depend.)
MAGNET TYPE Superconducting
BORE DIAMETER
or W x H
60 x 60 cm
MAGNET WEIGHT 5500 kg
H*W*D 240 x 188 x 157 cm
POWER REQUIREMENTS 380/400 V
COOLING SYSTEM TYPE
CRYOGEN USE 0.07 L/hr helium
FIELD STRENGTH 3 T
STRENGTH 30 (Master) mT/m
5-GAUSS FRINGE FIELD 3.0 m / 5.2 m
SHIMMING Passive and dynamic
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• View the DATABASE results for 'Intera 3.0T™' (2).Open this link in a new window

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Isotropic Motion
 
Motion, which is uniform in all directions. This is generally used in reference to molecular diffusion or rotation, which gives rise to relaxation of the spin system through the dipole dipole interaction.
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MRI Resources 
Resources - Colonography - Musculoskeletal and Joint MRI - Movies - General - MRI Technician and Technologist Jobs
 
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