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Result : Searchterm 'Helium' found in 1 term [] and 43 definitions []
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Searchterm 'Helium' was also found in the following services: 
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News  (15)  Resources  (3)  Forum  (7)  
 
Intera Achieva 3.0T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/main/products/mri/products/intera_achieva3.0t/ 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 advantages of the Achieva family and covers applications throughout the whole body.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore compact
Standard: T/R-head, Body, Optional phased array: CTL spine; Optional SENSE coils: Torso, Cardiac, Head, Knee, Breast, Neurovascular, Flex M, Flex L
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
Minimum TR
1.1 msec
FOV
Over 40 cm
0.05 mm
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
Variable (op. param. depend.)
35 x 35 cm
MAGNET WEIGHT
5500 kg
H*W*D
206 x 200 x 167 cm
POWER REQUIREMENTS
380/400 V
CRYOGEN USE
0.15 L/hr helium
STRENGTH
up to 80 mT/m
5-GAUSS FRINGE FIELD
3.0 m / 5.2 m
Passive and dynamic, 1st order std./2nd opt.
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• Related Searches:
    • MRI Equipment
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    • Device
    • High Field MRI
    • Superconducting Magnet
 
Further Reading:
  News & More:
Faster speed, better spatial resolution lead 3T benefits
   by sipi.usc.edu    
Searchterm 'Helium' was also found in the following services: 
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Radiology  (3) Open this link in a new windowUltrasound  (3) Open this link in a new window
Intera Achieva CV™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/main/products/mri/products/intera_achievacv/ From Philips Medical Systems;
The Intera Achieva CV is focused on cardiovascular imaging research and development, generating technology on the cutting edge for modern clinical needs, like easy coronary artery imaging, the evaluation of flow effects in vessels and peripheral angiography with optimal resolution per station.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore compact
Standard: Head, body, cardiac, optional phased array: Spine, pediatric, 3rd party connector; Optional SENSE? coils for all applications
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
FOV
Over 50 cm
0.05 mm
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
Variable (op. param. depend.)
60 x 60 cm
POWER REQUIREMENTS
380/400 V
CRYOGEN USE
0.03 L/hr helium
STRENGTH
up to 33 mT/m
5-GAUSS FRINGE FIELD
2.4 m / 3.8 m
Passive and dynamic
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• View the DATABASE results for 'Intera Achieva CV™' (2).Open this link in a new window

 
Further Reading:
  News & More:
Coronary Artery Disease: Combined Stress MR Imaging Protocol-One-Stop Evaluation of Myocardial Perfusion and Function1
   by radiology.rsnajnls.org    
MRI Resources 
Universities - DICOM - General - Safety Products - Artifacts - Colonography
 
Lung ImagingMRI Resource Directory:
 - Lung Imaging -
 
Lung imaging is furthermore a challenge in MRI because of the predominance of air within the lungs and associated susceptibility issues as well as low signal to noise of the inflated lung parenchyma. Cardiac and respiratory triggered or breath hold sequences allow diagnostic imaging, however a comparable image quality with computed tomography is still difficult to achieve.
Assumptions for lung MRI:
•
Low signal to noise ratio of the inherently low lung proton density.
•
Cardiac and respiratory motion artifacts.
•
Magnetic susceptibility effects of large magnetic field gradients.
•
Very short transverse relaxation times and significant diffusion yielding short T2 (30-70 msec), short T2* (1-3 msec), and additional long T1 relaxation times (1300-1500 msec).
•
The extreme short T2 values are responsible for a fast signal decay during a single shot readout, resulting in blurring.

The current trends in MRI are the use of new imaging technologies and increasingly powerful magnetic fields. Among these technologies are parallel imaging techniques as well as ventilation agents like hyperpolarized helium for the use as an inert inhalational contrast agent to study lung ventilation properties. With hyperpolarized gases clear images of the lungs can be obtained without using a large magnetic field (see also back projection imaging). Single shot sequences (e.g. TSE or Half Fourier Acquisition Single Shot Turbo Spin Echo HASTE) used in lung MR imaging benefits from parallel imaging techniques due to reduced relaxation time effects during the echo train and therefore reduced image blurring as well as reduced motion artifacts.
In the future, more effective contrast agents may provide an alternative solution to the need for high field MRI. Dynamic contrast enhanced MRI perfusion has demonstrated a potential in the diagnosis of pulmonary embolism or to characterize lung cancer and mediastinal tumors. 3D contrast enhanced magnetic resonance angiography of the thoracic vessel.

See also the related poll result: 'MRI will have replaced 50% of x-ray exams by'
 
Images, Movies, Sliders:
 Anatomic Imaging of the Lungs  Open this link in a new window
      

Courtesy of  Robert R. Edelman
 Normal Lung Gd Perfusion MRI  Open this link in a new window
      

Courtesy of  Robert R. Edelman

 MRI Thorax Basal Plane  Open this link in a new window
 
Radiology-tip.comradLung Scintigraphy
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• View the DATABASE results for 'Lung Imaging' (7).Open this link in a new window


• View the NEWS results for 'Lung Imaging' (3).Open this link in a new window.
 
Further Reading:
  Basics:
A safer approach for diagnostic medical imaging
Monday, 29 September 2014   by www.eurekalert.org    
Parallel Lung Imaging(.pdf)
  News & More:
Chest MRI a viable alternative to chest CT in COVID-19 pneumonia follow-up
Monday, 21 September 2020   by www.healthimaging.com    
CT Imaging Features of 2019 Novel Corona virus (2019-nCoV)
Tuesday, 4 February 2020   by pubs.rsna.org    
Polarean Imaging Phase III Trial Results Point to Potential Improvements in Lung Imaging
Wednesday, 29 January 2020   by www.diagnosticimaging.com    
Low Power MRI Helps Image Lungs, Brings Costs Down
Thursday, 10 October 2019   by www.medgadget.com    
Chest MRI Using Multivane-XD, a Novel T2-Weighted Free Breathing MR Sequence
Thursday, 11 July 2019   by www.sciencedirect.co    
Researchers Review Importance of Non-Invasive Imaging in Diagnosis and Management of PAH
Wednesday, 11 March 2015   by lungdiseasenews.com    
New MRI Approach Reveals Bronchiectasis' Key Features Within the Lung
Thursday, 13 November 2014   by lungdiseasenews.com    
MRI techniques improve pulmonary embolism detection
Monday, 19 March 2012   by medicalxpress.com    
  News & More:
Partnership with VIDA to streamline adoption of advanced MRI of the lungs
Monday, 11 September 2023   by www.itnonline.com    
Searchterm 'Helium' was also found in the following services: 
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News  (15)  Resources  (3)  Forum  (7)  
 
MAGNETOM Allegra™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.med.siemens.com/med/d/gg/mr/products/allegra.htm From Siemens Medical Systems;
the 3 T MAGNETOM Allegra is a dedicated MR headscanner, perfect as a research system in cognitive and neuroscience with MRS and fMRI. MAGNETOM Allegra is a full member of the MAGNETOM product family. It uses many common components, i.e. electronics, computer system, software and pulse sequence concepts.
Device Information and Specification
CLINICAL APPLICATION
CONFIGURATION
Short bore
Yes/Mutli-nuclear MRS
PULSE SEQUENCES
GRE, IR, FIR, STIR, TrueIR/FISP, FSE, FLAIR, MT, SS-FSE, MT-SE, MTC, MSE, EPI, GMR, fat/water sat./exc.
IMAGING MODES
Single, multislice, volume study, multi angle, multi oblique
SINGLE/MULTI SLICE
178 images/sec at 256 x 256 at 100% FOV
FOV
22 cm
Min 2D/3D: 0.1/0.05 mm
1024 x 1024 full screen display
MEASURING MATRIX
64 x 64 to 1024 x 1024
10 micrometer
BORE DIAMETER
or W x H
60 x 60 cm
MAGNET WEIGHT (gantry included)
5500 kg
DIMENSION H*W*D (gantry included)
220 x 220 x 147 cm
POWER REQUIREMENTS
380/400/420/440/480 V
COOLING SYSTEM TYPE
Single cryogen, 2 stage refrig.
CRYOGEN USE
0.1 L/hr helium
STRENGTH
40 mT/m
Passive, act.; 1st order std./2nd opt.
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• View the DATABASE results for 'MAGNETOM Allegra™' (2).Open this link in a new window

Searchterm 'Helium' was also found in the following services: 
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Radiology  (3) Open this link in a new windowUltrasound  (3) Open this link in a new window
MAGNETOM Spectra
 
www.healthcare.siemens.com/magnetic-resonance-imaging/3t-mri-scanner/magnetom-spectra From Siemens Medical Systems;
Received FDA clearance in 2012.
The MAGNETOM Spectra is a cost-optimized high field MRI system with Tim 4G and Dot technologies. The system consumes less energy compared to other 3 Tesla scanners. The magnet-cooling helium is contained in a closed loop, which prevents the gas from escaping and reduces the need for refills. TimTX includes innovative techniques in the radio frequency excitation hardware as well as new application and processing features enabling uniform RF distribution in all body regions.
Device Information and Specification
CLINICAL APPLICATION
Whole Body
CONFIGURATION
Short bore
3 Tesla
Head, spine, torso/ body coil, neurovascular, neck and multi-purpose flex coils. Peripheral vascular, breast, shoulder, knee, wrist, foot//ankle, endorectal optional.
CHANNELS
24
Chemical shift imaging, single voxel spectroscopy
IMAGING TECHNIQUES
iPAT, mSENSE and GRAPPA (image, k-space), noncontrast angiography, radial motion compensation
FOV
0.5 - 45 cm
BORE DIAMETER
or W x H
At isocenter: L-R 60 cm
TABLE CAPACITY
200 kg
MAGNET WEIGHT
7200 kg
DIMENSION H*W*D (gantry included)
173 x 231 x 219 cm
5-GAUSS FRINGE FIELD
2.6 m / 4.6 m
CRYOGEN USE
Zero boil off rate, approx. 10 years
COOLING SYSTEM
Water; single cryogen, 2 stage refrigeration
up to 125 T/m/s
MAX. AMPLITUDE
33 mT/m
Passive, active; first order standard, second order optional
POWER REQUIREMENTS
380 / 400 / 420 / 440 / 460 / 480 V, 3-phase + ground; connection value with chiller 100 kvA /without chiller 60 kVA
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MRI Resources 
Mobile MRI Rental - Contrast Enhanced MRI - Shoulder MRI - PACS - Safety Products - Services and Supplies
 
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