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| | | | | | | Searchterm 'Power' was also found in the following services: | | | | |
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A means for optimizing the tuning and matching of RF coils under different loading conditions without operator intervention. For large high- power coils such as body coils, autotuning involves the adjustment of variable capacitors using electric or hydraulic motors. For low power coils, the tuning elements are most often variable capacitance diodes (varactors) fed by a computer-generated variable voltage. | | | | | |
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Device Information and Specification
CLINICAL APPLICATION
Dedicated extremity
SE, GE, IR, STIR, FSE, 3D CE, GE-STIR, 3D GE, ME, TME, HSE
IMAGING MODES
Single, multislice, volume study, fast scan, multi slab
2D: 2 mm - 10 mm;
3D: 0.6 mm - 10 mm
4,096 gray lvls, 256 lvls in 3D
POWER REQUIREMENTS
100/110/200/220/230/240
| | | | • View the DATABASE results for 'C-SCAN™' (4).
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Duty cycle is the time during which the gradient system can be run at maximum power. The duty cycle is based on the total time and includes the cool down phase. The duty cycle on the RF pulse during MRI is restricted based on the specific absorption rate (SAR) limit. SAR limits restrict radio frequency heating effects. The specific absorption rate increases with field strength, radio frequency power and duty cycle, type of the transmitter coil and body size. The especially in high and ultrahigh magnetic fields, important SAR issue can be readily addressed by reducing the RF duty cycle due to longer repetition times (TR) and the use of parallel imaging techniques. A TR longer than the minimum needed provides time for the tissue to cool down, but for the cost of a longer scan time. A parallel imaging technique reduces the RF exposure and the scan time. See also High Field MRI. | | | | • View the DATABASE results for 'Duty Cycle' (5).
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| | | Searchterm 'Power' was also found in the following services: | | | | |
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Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Cylindrical Wide Short Bore
Opt. (WIP) Single and Multi Voxel
SE, FE, IR, FastSE, FastIR, FastFLAIR, Fast STIR, FastFE, FASE, Hybrid EPI, Multi Shot EPI; Angiography: 2D(gate/non-gate)/3D TOF, SORS-STC
IMAGING MODES
Single, multislice, volume study
TE
8 msec min. SE; 1.2 msec min. FE
less than 0.015 (256x256)
1.0 min. 2-DFT: 0.2 min. 3-DFT
32-1024, phase;; 64-1024, freq.
65.5 cm, patient aperture
4050 kg (bare magnet incl. L-He)
COOLING SYSTEM TYPE
Closed-loop water-cooled
Liquid helium: approx. less than 0.05 L/hr
Passive, active, auto-active
| | | | • View the DATABASE results for 'Excelart AG™ with Pianissimo' (2).
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From Philips Medical Systems;
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
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
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
TR
Min. 1.6 (Master) msec
TE
Min. 0.5 (Master) msec
RapidView Recon. greater than 500 @ 256 Matrix
0.1 mm (Omni), 0.05 mm (Power)
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
STRENGTH
30 (Master) mT/m
| | | | • View the DATABASE results for 'Intera 3.0T™' (2).
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