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MR Guided InterventionsMRI Resource Directory:
 - MR Guided Interventions -
 
Possible MR guided interventions are breast MRI, liver and bone biopsies. Open MRI is advantageous to guide interventional procedures because this type of MRI scanner provides a better patient access.
Before the MRI guided biopsy is started, all the necessary precautions ensuring normal sterile and safe conditions for an intervention have to be performed. This includes the special safety issues concerning MRI surroundings and special equipment, like non-magnetic biopsy needles, localization tools (e.g. wires to mark lesions prior to surgery with breast MRI guidance) etc.

See also 5 Gauss Line, Contraindications, Low Field MRI, MR Compatibility, Magnetic Resonance Guided Focused Ultrasound and Computer Aided Detection.
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Further Reading:
  Basics:
NeuroArm Robot Promises to Revolutionise MRI-guided Neurosurgery
Wednesday, 7 November 2007   by www.medgadget.com    
Magnetic resonance imaging guided musculoskeletal interventions
at 0.23T
2002
Physics of MRI Safety
   by www.aapm.org    
  News & More:
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    
MRI Resources 
Lung Imaging - Contrast Agents - Education pool - Abdominal Imaging - Coils - MRI Technician and Technologist Schools
 
Aurora® 1.5T Dedicated Breast MRI SystemInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
www.auroramri.com/mri/product/ From Aurora Imaging Technology, Inc.;
The Aurora® 1.5T Dedicated Breast MRI System with Bilateral SpiralRODEO™ is the first and only FDA approved MRI device designed specifically for breast imaging. The Aurora System, which is already in clinical use at a growing number of leading breast care centers in the US, Europe, got in December 2006 also the approval from the State Food and Drug Administration of the People's Republic of China (SFDA).
'Some of the proprietary and distinguishing features of the Aurora System include: 1) an ellipsoid magnetic shim that provides coverage of both breasts, the chest wall and bilateral axillary lymph nodes; 2) a precision gradient coil with the high linearity required for high resolution spiral reconstruction;; 3) a patient-handling table that provides patient comfort and procedural utility; 4) a fully integrated Interventional System for MRI guided biopsy and localization; and 5) the user-friendly AuroraCAD™ computer-aided image display system designed to improve the accuracy and efficiency of diagnostic interpretations.'
Device Information and Specification
CLINICAL APPLICATION
CONFIGURATION
Short bore compact
IMAGING MODES
Bi-lateral RODEO fat suppression, high resolution Rotating Delivery of Excitation Offresonance Spiral, integrated targeting SW compatible with major MR guided intervention equipment
TR
10 ms for gradient echo and less than 2,500 ms for T2 weighted spin echo
TE
From 5 ms for RODEO Plus to over 80 ms, 120 ms for T2 sequences
SINGLE/MULTI SLICE
Around 0.02 sec for a 256x256 image, 12.4 sec for a 512 x 512 x 32 multislice set
FOV
20 - 36 cm, max. elliptical 36 x 44 cm
MEASURING MATRIX
512 x 512
BORE DIAMETER
or W x H
64 cm diameter (gantry)
MAGNET WEIGHT
8,500 lbs
H*W*D
240 x 188 x 163 cm
POWER REQUIREMENTS
150A/120V-208Y/3 Phase//60 Hz/5 Wire
COOLING SYSTEM
Helium for magnet, distilled/de-ionized water for coil;
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• View the DATABASE results for 'Aurora® 1.5T Dedicated Breast MRI System' (2).Open this link in a new window


• View the NEWS results for 'Aurora® 1.5T Dedicated Breast MRI System' (3).Open this link in a new window.
 
Further Reading:
  News & More:
Aurora Imaging Technology Announces Approval in China
   by salesandmarketingnetwork.com    
Aurora Imaging Technology, Inc. Release: Results of a Multi-Center Trial Demonstrates Superior Diagnostic Performance of the Aurora® 1.5T Dedicated Breast MRI System Over Whole-Body Breast MRI
Monday, 1 October 2012   by www.biospace.com    
MRI Resources 
MRCP - Shielding - RIS - Universities - MRI Reimbursement - Safety pool
 
Intera 1.5TPanorama 0.2InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.medical.philips.com/de/products/mri/products/ From Philips Medical Systems;
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
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
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
0.1 mm(Omni), 0.05 mm (Pwr/Mstr/Expl)
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 cm diameter (patient)
MAGNET WEIGHT
2900 kg
H*W*D
240 x 188 x 157 cm
POWER REQUIREMENTS
380/400 V
CRYOGEN USE
0.03 L/hr helium
STRENGTH
30 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 1.5T™' (2).Open this link in a new window

Searchterm 'Intervention' was also found in the following services: 
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News  (43)  Resources  (29)  Forum  (1)  
 
Autotuning
 
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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MRI Resources 
Liver Imaging - Guidance - Journals - Education pool - Lung Imaging - Chemistry
 
Biopsy
 
MRI guided biopsies are usually performed for lesions that are found on for example liver or breast MRI procedures and that are not seen on computed tomography, ultrasonography or mammography. The identification of cancer on breast MRI is dependent on uptake of intravenous contrast agents.
First an MRI scan, using a dedicated breast coil and biopsy guidance system is performed to found the lesion. After skin disinfection and local anesthesia, the biopsy procedure starts. Possible MR guided interventions include fine needle aspiration, core needle biopsy and vacuum-assisted biopsy (VABB) to sample tissue from the lesion; or wire localization prior to surgery for lesions that are not palpable.

See also Breast MRI.
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• View the DATABASE results for 'Biopsy' (10).Open this link in a new window


• View the NEWS results for 'Biopsy' (6).Open this link in a new window.
 
Further Reading:
  Basics:
Specimen radiography confirms success of MRI-guided breast biopsy
Friday, 11 August 2006   by www.eurekalert.org    
Physics of MRI Safety
   by www.aapm.org    
  News & More:
FDA Clears MRI-Compatible Robotics System for Breast Biopsy
Thursday, 14 September 2023   by www.diagnosticimaging.com    
Clinical trial: Using MRI for prostate cancer diagnosis equals or beats current standard
Thursday, 4 February 2021   by www.eurekalert.org    
The effects of incidental findings from whole-body MRI on the frequency of biopsies and detected malignancies or benign conditions in a general population cohort study
Sunday, 30 August 2020   by link.springer.com    
Magnetic Resonance Imaging Guided Confirmatory Biopsy for Initiating Active Surveillance of Prostate Cancer
Wednesday, 11 September 2019   by jamanetwork.com    
Siemens, U. of Twente Biopsy Robot Promises Greater Precision, Less Cost
Friday, 22 January 2016   by www.meddeviceonline.com    
Combination of MRI and PET imaging techniques can prevent second breast biopsy
Sunday, 29 June 2014   by www.news-medical.net    
MRI Resources 
Brain MRI - Knee MRI - Abdominal Imaging - Spectroscopy - MR Guided Interventions -
 
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