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Result : Searchterm 'Diffusion' found in 8 terms [] and 36 definitions []
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News  (29)  Resources  (8)  Forum  (13)  
 
Signa SP 0.5T™ Open ConfigurationInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From GE Healthcare;
www.gehealthcare.com/usen/mr/index.html The Signa SP 0.5T™ is an open MRI magnet that is designed for use in interventional radiology and intra-operative imaging. The vertical gap configuration increases patient positioning options, improves patient observation, and allows continuous access to the patient during imaging. The magnet enclosure also incorporates an intercom, patient observation video camera, laser patient alignment lights, and task lighting in the imaging volume.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Open
SURFACE COILS Integrated transmit and receive body coil;; optional rotational body coil, head;; other coils optional; open architecture makes system compatible with a wide selection of coilsarray
SPECTROSCOPY No
SYNCHRONIZATION Standard cardiac gating, ECG/peripheral, respiratory gating
PULSE SEQUENCES Standard: SE, IR, 2D/3D GRE and SPGR, 2D/3D TOF, 2D/3D FSE, 2D/3D FGRE and FSPGR, SSFP, FLAIR, EPI, optional: 2D/3D Fiesta, true chem sat, fat/water separation, single shot diffusion EPI
IMAGING MODES Localizer, single slice, multislice, volume, fast, POMP, multi slab, cine, slice and frequency zip, extended dynamic range, tailored RF
TR 1.3 to 12000 msec in increments of 1 msec
TE 0.4 to 2000 msec in increments of 1 msec
FOV 3cm to 40 cm continuous
SLICE THICKNESS 2D: 1.4mm - 20mm 3D: 0.2mm - 20mm
DISPLAY MATRIX 1280 x 1024
MEASURING MATRIX 128x512 steps 32 phase//freq.
PIXEL INTENSITY 256 gray levels
MAGNET TYPE Superconducting
BORE DIAMETER
or W x H
60 x 58 cm
POWER REQUIREMENTS 200 - 480, 3-phase
COOLING SYSTEM TYPE Liquid helium
CRYOGEN USE 0.03 L/hr, holds 300 L
FIELD STRENGTH 0.5 T
STRENGTH 12 mT/m
SHIMMING Active
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Further Reading:
  News & More:
MR Surgical Suite, Improving surgical procedure quality (.pdf)
   by www3.gehealthcare.com    
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Spine MRIMRI Resource Directory:
 - Spine MRI -
 
Magnetic resonance imaging (MRI) of the spine is a noninvasive procedure to evaluate different types of tissue, including the spinal cord, vertebral disks and spaces between the vertebrae through which the nerves travel, as well as distinguish healthy tissue from diseased tissue.
The cervical, thoracic and lumbar spine MRI should be scanned in individual sections. The scan protocol parameter like e.g. the field of view (FOV), slice thickness and matrix are usually different for cervical, thoracic and lumbar spine MRI, but the method is similar. The standard views in the basic spinal MRI scan to create detailed slices (cross sections) are sagittal T1 weighted and T2 weighted images over the whole body part, and transverse (e.g. multi angle oblique) over the region of interest with different pulse sequences according to the result of the sagittal slices. Additional views or different types of pulse sequences like fat suppression, fluid attenuation inversion recovery (FLAIR) or diffusion weighted imaging are created dependent on the indication.
Indications:
Neurological deficit, evidence of radiculopathy, cauda equina compression
Primary tumors or drop metastases
Infection/inflammatory disease, multiple sclerosis
Postoperative evaluation of lumbar spine: disk vs. scar
Evaluation of syrinx
Localized back pain with no radiculopathy (leg pain)

Contrast enhanced MRI techniques delineate infections vs. malignancies, show a syrinx cavity and support to differentiate the postoperative conditions. After surgery for disk disease, significant fibrosis can occur in the spine. This scarring can mimic residual disk herniation. Magnetic resonance myelography evaluates spinal stenosis and various intervertebral discs can be imaged with multi angle oblique techniques. Cine series can be used to show true range of motion studies of parts of the spine. Advanced open MRI devices are developed to perform positional scans in the position of pain or symptom (e.g. Upright™ MRI formerly Stand-Up MRI).
 
Images, Movies, Sliders:
 Anatomic Imaging of the Lumbar Spine  Open this link in a new window
      

Courtesy of  Robert R. Edelman

 
Radiology-tip.comBone Densitometry,  Myelography
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• View the DATABASE results for 'Spine MRI' (11).Open this link in a new window


• View the NEWS results for 'Spine MRI' (4).Open this link in a new window.
 
Further Reading:
  Basics:
Newer Sequences for Spinal MR Imaging: Smorgasbord or Succotash of Acronyms?
   by www.ajnr.org    
Cutting Edge Imaging of THE Spine
February 2007   by www.pubmedcentral.nih.gov    
Landmark Independent Study by UCLA School of Medicine Reports Comparison of Dynamic™ Upright® MRI With Static Upright MRI in More Than 1,000 Patients (1,302):
Thursday, 15 November 2007   by www.fonar.com    
  News & More:
Discriminating imaging findings of acute osteoporotic vertebral fracture: a prospective multicenter cohort study
Thursday, 9 October 2014   by 7thspace.com    
Lumbar spine MRI limited in diagnosing ankylosing spondylitis
Friday, 7 March 2014   by www.healio.com    
MRI Of The Spine Identifies Smoldering Myeloma Patients At High Risk Of Progressing To Multiple Myeloma
Tuesday, 26 August 2014   by www.myelomabeacon.com    
Intensive training of young tennis players causes spinal damage
Wednesday, 18 July 2007   by www.eurekalert.org    
Imaging Technique for Spinal Cord Injury Shows Promise
Sunday, 22 December 2013   by www.wauwatosanow.com    
MRI Resources 
Safety pool - Education - Absorption and Emission - General - Shoulder MRI - Diffusion Weighted Imaging
 
Trace Image
 
In trace images, the contrast is generated by the direction of the diffusion tensor. This parametric images contains the average of the three eigenvalues (independent of the frame of reference).
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• View the DATABASE results for 'Trace Image' (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)  
 
Ultra™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
medical.toshiba.com/clinical/radiology/ultra.htm From Toshiba America Medical Systems Inc.;
the Ultra™ system was developed to help healthcare providers be more competitive by delivering greater patient comfort and a broad range of clinical capabilities, says Anita Bowler, product manager, MRI Business Unit, Toshiba America Medical Systems Inc With its unique, powerful gradient technology, the Ultra™ performs advanced clinical studies and consistently provides high-resolution images that are typically associated with high field MRI systems. At the same time, the Ultra™ offers a truly open feeling that makes patients more relaxed, especially those with claustrophobic tendencies.

Device Information and Specification
CLINICAL APPLICATION Whole Body
CONFIGURATION Open MRI
SURFACE COILS Quadrature, solenoid and multi-channel configurations
PULSE SEQUENCES SE, FE, IR, FastSE, FastIR, FastFLAIR, Fast STIR, FastFE, FASE, Hybrid EPI, Multi Shot EPI, Single shot EPI diffusion, True SSFP, SuperFASE; Angiography: 2D(gate/non-gate)/3D TOF, SORS-STC, Black Blood MRA
MAGNET TYPE Superconducting
POWER REQUIREMENTS 380/400/415/440/480 V
COOLING SYSTEM TYPE Cryogenless
FIELD STRENGTH 0.35 T
STRENGTH 25 mT/m
SHIMMING Passive, active
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