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Result : Searchterm 'Vantage' found in 1 term [] and 68 definitions []
| previous 41 - 45 (of 69) nextResult Pages : [1] [2 3 4 5 6 7 8 9 10 11 12 13 14] | | | | Searchterm 'Vantage' was also found in the following services: | | | | |
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The principal ad vantage 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' | | | | | | | | | | | Further Reading: | | Basics:
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From Philips Medical Systems;
Philips continues to expand the frontiers of utra high field MRI with the introduction of the new Intera Achieva 3.0T™. Its powerful future-safe platform shares all the ad vantages of the Achieva family and covers applications throughout the whole body.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore compact
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
128 x 128, 256 x 256,512 x 512,1024 x 1024 (64 for Bold img)
Variable in 1% increments
Lum.: 120 cd/m2; contrast: 150:1
Variable (op. param. depend.)
POWER REQUIREMENTS
380/400 V
Passive and dynamic, 1st order std./2nd opt.
| | | | • View the DATABASE results for 'Intera Achieva 3.0T™' (2).
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Keyhole imaging is used for dynamic imaging with contrast medium. The ad vantage is that the keyhole technique increases temporal resolution without a loss of spatial resolution by limited data acquisition. Keyhole Fourier imaging updates the low spatial frequencies of the original full, high-resolution data set. The high spatial frequency content of the image is constant in time so that its updating would be unnecessary. The high spatial frequency data is acquired from a baseline image, for example, before injection of a contrast agent.
After contrast injection, only the lower spatial frequency data is acquired because, there is no change in the tissue that is responsible for the higher frequency spatial variation in the image. | | | | • View the DATABASE results for 'Keyhole' (8).
| | | • View the NEWS results for 'Keyhole' (1).
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| | | | • View the DATABASE results for 'MR Guided Interventions' (8).
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AI analysis finds younger AFib patients benefit from MRI-guided ablation treatments Friday, 25 August 2023 by www.eurekalert.org | | |
Theranostic nano-platform for MRI-guided synergistic therapy against breast cancer Monday, 26 September 2022 by phys.org | | |
Magnetic seeds used to heat and kill cancer Tuesday, 1 February 2022 by www.sciencedaily.com | | |
What is the effect of MRI with targeted biopsies on the rate of patients discontinuing active surveillance? A reflection of the use of MRI in the PRIAS study Thursday, 8 April 2021 by www.docwirenews.com | | |
Modeling of Active Shimming of Metallic Needles for Interventional MRI Monday, 29 June 2020 by pubmed.ncbi.nlm.nih.gov | | |
Magnetic Resonance Imaging Guided Confirmatory Biopsy for Initiating Active Surveillance of Prostate Cancer Wednesday, 11 September 2019 by jamanetwork.com | | |
FDA clears ViewRay's next-gen, MRI-guided radiation therapy device Tuesday, 28 February 2017 by www.fiercebiotech.com | | |
Siemens, U. of Twente Biopsy Robot Promises Greater Precision, Less Cost Friday, 22 January 2016 by www.meddeviceonline.com | | |
Magnetic resonance-guided motorized transcranial ultrasound system for blood-brain barrier permeabilization along arbitrary trajectories in rodents Thursday, 24 December 2015 by www.ncbi.nlm.nih.gov | | |
New MRI-Guided Catheter Shows Major Potential for Stroke Treatment Tuesday, 29 December 2015 by www.radiology.ucsf.edu | | |
Polish study on MRI-ultrasound for targeted prostate biopsy wins CEM award Tuesday, 12 November 2013 by medicalxpress.com | | |
C4 Imaging Announces FDA 510(k) Clearance of its Positive-Signal MRI Marker - Sirius™ Friday, 6 December 2013 by www.digitaljournal.com |
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From ONI Medical Systems, Inc.;
MSK-Extreme™ MRI system is a dedicated high field extremity imaging device, designed to provide orthopedic surgeons and other physicians with detailed diagnostic images of the foot, ankle, knee, hand, wrist and elbow, all with the clinical confidence and ad vantages derived from high field, whole body MRI units. The light weight (less than 650 kg) of the OrthOne System performs rapid patient studies, is easy to operate, has a patient friendly open environment and can be installed in a practice office or hospital, all at a cost similar to a low field extremity machine.
New features include a more powerful operating system that offers increased scan speed as well as a 160-mm knee coil with higher signal to noise ratio, and the option of a CD burner.
Device Information and Specification 16 cm knee, 18 cm lower extremity;; 12.3 cm upper extremity, additional high resolution v-SPEC Coils: 80 mm, 100 mm, or 145 mm. SE, FSE, GE2D, GE3D, Inversion recovery (IR), Driven Equilibrium, Fat Saturation (FS), STIR, MT, PD, Flow Compensation (FC), RF spoiling, MTE, No Phase Wrap (NPW) IMAGING MODES Scout, single, multislice, volume 2D less than 200 msec/image X/Y: 64-512; 2 pixel steps 4,096 grey lvls; 256 lvls in 3D POWER REQUIREMENTS 115VAC, 1phase, 20A; 208VAC, 3 phase, 30A COOLING SYSTEM TYPE LHe with 2 stage cold head 1.25m radial x 1.8m axial
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