University of Wisconsin–Madison

Scanner Comparisons

UW Hospital & Clinics

System Name UWMR2 UWMR3 UWMR4 UWMR5 UWMR6
Location E1/368
CSC
E1/344
CSC
F2/380E
CSC
E1/321
CSC
E3/E301
CSC
Phone Number 262-6073 262-6073 261-1734 261-1734 265-8836
System ID 608263UMRH 608262MR3 608263MR4I 608263MR5W 608RIOMR1
Magnetic Field Strength 1.5 T 1.5 T 1.5 T 3.0 T 3.0 T
Scanner Type Signa HDxt Signa Artist Optima MR 450w Signa Architect Signa Premier
Software Revision HD23 DV26 DV26 DV26 RX27
Gradient Type EchoSpeed XRMw XRMw XRMw HRMw
Target Gradient Strength (mT/m) 33 33 33 33 70
Target Gradient Slew Rate (mT/m/msec) 120-EPI
77-non-EPI
120 120 120 150
Peak Gradient Strength (mT/m) 33 44 44 44 80
Peak Gradient Slew Rate (mT/m/msec) 120 200 200 200 200
Number of Receivers 8 128 32 128 146
Multi-Nuclear Spectroscopy (MNS) Installed No No No No No
Bore Diameter (cm) 60 70 70 70 70

AFCH

System Name AFCHMR1
Location 1132 AFCH
Phone Number 890-7121
System ID 608CHILDMR1
Magnetic Field Strength 3.0 T
Scanner Type Discovery MR 750w
Software Revision DV26
Gradient Type XRMw
Target Gradient Strength (mT/m) 33
Target Gradient Slew Rate (mT/m/msec) 120
Peak Gradient Strength (mT/m) 44
Peak Gradient Slew Rate (mT/m/msec) 200
Number of Receivers 32
Multi-Nuclear Spectroscopy (MNS) Installed No
Bore Diameter (cm) 70

Research Park

System Name RPMR1 RPMR2 RPMR3 RPMR4
Location 2283 2410A 2434 2414
UW Sports Medicine UW Sports Medicine UW Sports Medicine UW Sports Medicine
Phone Number 265-8337 262-8711 890-9855 262-9182
System ID 608267SMC 608263WAIS 608265MR750W 608262MR4
Magnetic Field Strength 1.5 T 1.5 T 3.0 T 3.0 T
Scanner Type Signa HDxt Signa HDxt Discovery MR 750w Discovery MR 750
Software Revision HD23 HD23 DV26 DV26
Gradient Type EchoSpeed EchoSpeed XRMw XRM
Gradient Strength (mT/m) 33 33 33 50
Gradient Slew Rate (mT/m/msec) 120-EPI 120-EPI 120 200
77-non-EPI 77-non-EPI
Peak Gradient Strength (mT/m) 33 33 44 87
Peak Gradient Slew Rate (mT/m/msec) 120 120 200 346
Number of Receivers 8 8 32 32
Multi-Nuclear Spectroscopy (MNS) Installed No No No No
Bore Diameter (cm) 60 60 70 60

TAC

System Name TACMR1 TACMR2
Location 1044 TAC 1038 TAC
Phone Number (608) 234-6668 (608) 234-6668
System ID 608890MR450W 608890MR750
Magnetic Field Strength 1.5 T 3.0 T
Scanner Type Optima MR 450w Discovery MR 750
Software Revision DV26 DV26
Gradient Type XRMw XRM
Target Gradient Strength (mT/m) 33 50
Target Gradient Slew Rate (mT/m/msec) 120 200
Peak Gradient Strength (mT/m) 44 87
Peak Gradient Slew Rate (mT/m/msec) 200 346
Number of Receivers 32 32
Multi-Nuclear Spectroscopy (MNS) Installed No No
Bore Diameter (cm) 70 60

WIMR

System Name WIMRMR1 WIMRMR2 WIMRPETMR1
Location 1247 WIMR 1255 WIMR B1258 WIMR
Phone Number 262-8632 261-1940 262-6115
System ID 608262WIMRMR1 608WIMRMR2 608262PETMR1
Magnetic Field Strength 3.0 T 3.0 T 3.0 T
Scanner Type Signa Premier Discovery MR 750 Signa PET/MR
Software Revision RX27 DV26 MP24
Gradient Type HRMw XRM XRMw
Target Gradient Strength (mT/m) 70 50 33
Target Gradient Slew Rate (mT/m/msec) 150 200 120
Peak Gradient Strength (mT/m) 80 87 44
Peak Gradient Slew Rate (mT/m/msec) 200 346 200
Number of Receivers 146 32 32
Multi-Nuclear Spectroscopy (MNS) Installed No Yes Yes
Bore Diameter (cm) 70 60 70

Imaging Applications

Both 1.5T and 3T MRI systems at WIMR are accredited by the ACR (American College of Radiology) MRI accreditation program, and the ACRIN (ACR Imaging Network) CQIE (Centers for Quantitative Imaging Excellence) program. MRI systems at the CSC are also ACR accredited for MRI. One system at the CSC and one system at the Research Park Clinic are ACR accredited for breast MRI.

Anatomic imaging is available for neuro, cardiac, MSK, abdominal, thoracic, peripheral, vascular, breast, and spine applications. Imaging can be performed as multi-slice 2D and volumetric 3D acquisitions (including BRAVO and CUBE for 3D isotropic T1- and T2-weighted imaging). Parallel imaging (ASSET/ARC) is available for many imaging sequences.

Gadolinium-based contrast agents can be used for an extra charge, following screening for NSF safety. Available FDA-approved Gd-based agents are Omniscan (gadodiamide), MultiHance (gadobenate dimeglumine), and Ablavar (gadofosveset trisodium). Imaging can be performed after the administration of a contrast agent for tumor imaging. FDA-approved contrast agents supplied by the investigator can be also used for human subjects. Contrast agents that are not FDA-approved and supplied by the investigator can be used after appropriate IACUC approval for animal subjects.

 

General

Fat/Water Separated Imaging

In addition to conventional fat saturation methods, fat/water separated imaging (i.e., generation of fat-only and water-only images) can be produced using the GE Healthcare IDEAL and Flex sequence variations.

Dynamic Contrast Enhanced Perfusion Imaging

DCE (T1-weighted) perfusion imaging using a Gd-based contrast agent is most commonly used for imaging tumor perfusion. Perfusion maps can be generated as part of image analysis provided by the IMAC.

MR Spectroscopy and Spectroscopic Imaging

Magnetic Resonance Spectroscopy (MRS) and Spectroscopic Imaging (MRSI) are available for neuro, breast, liver, and prostate applications.

Realtime Imaging

Interactive realtime imaging can be performed using the rtHawk-based system from HeartVista, Inc. which interfaces with the GE MRI systems. Applications include cardiac and vascular imaging, and neuro and body MR-guided interventions. While not FDA-approved, this system has been extensively tested, and is used in several ongoing research projects.

 

Neuro, Spine, and MSK

Dynamic Susceptibility Contrast Perfusion Imaging

DSC (T2*-weighted) perfusion imaging can be performed following injection of a Gd-based contrast agent. This type of imaging is commonly used in the clinic to assess the effects of stroke. Perfusion parameter maps, including the parameters rCBF, rCBV, FMT, Tmax and MTT, can be produced using locally-developed post-processing software, or software supplied by GE.

ASL Perfusion Imaging

Perfusion imaging can be performed without exogenous contrast agents for the assessment of cerebral blood flow in human subjects using Arterial Spin Labeling.

Susceptibility-Weighted Imaging

Susceptibility-Weighted Imaging (SWI) is available using the SWAN technique.

Diffusion-Weighted Imaging and Diffustion-Tensor Imaging

Diffusion-Weighted Imaging (DWI) and Difusion-Tensor Imaging (DTI, including tractography) can be performed to assess the restriction of water diffusion in tissue. Basic online diffusion parameter maps (ADC, FA) are automatically generated. DTI tractograms can be reconstructed as part of image analysis provided by the IMAC.

Functional Neuro MRI (fMRI)

Functional Neuro MRI (fMRI) is available at WIMR for research applications, and at other sites for clinical applications. Dedicated research staff acquire and process fMRI data. Commonly used paradigms include language and motor tasks such as word generation and unilateral finger tapping. Assistance is available for development of new fMRI tasks. Research fMRI studies are processed off-line using common software packages such as AFNI. Clinical fMRI studies are processed using PRISM.

Neuronavigation

Using the FDA-approved Clearpoint™ system from MRI Interventions, image-guided targeting of deep structures in the brain is possible, and can be used to guide interventions including DBS electrode placement and drug infusions.

Imaging near Orthopedic Implants

With the MAVRIC SL imaging option from GE Healthcare, imaging near orthopedic implants, such as knee and hip implants, is greatly improved by acquiring multiple image volumes with discrete frequency offsets, view-angle tilting, and specialized reconstruction techniques.

 

Body and Breast

Liver Fat-Fraction

Quantitative assessment of liver fat-fraction and iron content can be assessed using the IDEAL-IQ sequence.

Hyper-Polarized Gas Imaging

Facilities are available at WIMR for generating hyper-polarized Helium (He-3) or Xenon (Xe-129) gas for lung and airway imaging. Hyper-polarization of Carbon (C-13) is also available for pre-clinical imaging on the Varian 4.7T system.

Functional Body MRI

Functional Body MR Imaging is available for a wide variety of imaging scenarios. Applications include Renal BOLD and ASL perfusion imaging, quantitative liver imaging using IDEAL IQ, and liver stiffness assessment using MR Elastography (MRE).

 

Cardiac and Vascular

Cardiac MRI

A full suite of Cardiac MRI techniques is available, including function assessment with 2D FIESTA, real-time perfusion and motion imaging with MR-Echo, cardiac tagging, double- and triple-inversion recovery (Double-/Triple-IR) imaging, myocardial R2*(=1/T2*) mapping for iron overload evaluation, 2D- and 3D-Cardiac IDEAL for water/fat separation, delayed enhancement (DE) / late-gadolinium enhanced (LGE) imaging for myocardial viability imaging,nd 3D Heart for coronary artery imaging.

Vascular Imaging

Dedicated vascular imaging techniques, including MR Angiography (MRA) and MR flow measurements are available. Standard clinical MRA methods including Time-Of-Flight (TOF) MRA, 2D Phase Contrast (PC) MRA, non contrast-enhanced (NCE) Inhance methods from GE Healthcare, and contrast enhanced imaging including TRICKS and Fluoro-Triggered 3D MRA (with ARC parallel imaging and ROSE) are available. PC-VIPR (Phase Contrast with Vastly-undersampled Isotropic Projection Reconstruction Trajectories) is a 3D volumetric flow imaging method, developed at UW-Madison, that while not yet FDA-approved, has been widely tested and validated and is used in multiple research projects. MRA post-processing is available, and can included advanced methods for reconstruction of 3D flow data. Additional vascular imaging methods are under continual development in the MRI lab, and may also be available for research projects.

Installed Features

UH
AFCH
RP
TAC
WIMR
  Software Option
UWMR2
UWMR3
UWMR4
UWMR5
UWMR6
AFCHMR1
RPMR1
RPMR2
RPMR3
RPMR4
TACMR1
TACMR2
WIMRMR1
WIMRMR2
WIMRMRPET1
HD23
DV26
DV26
DV26
RX27
DV26
HD23
HD23
DV26
DV26
DV26
DV26
RX27
DV26
MP26

General

Echo Planar Imaging
Fiesta 2D
Fiesta 3D
2D Fat Sat Fiesta
3D Fat Sat FIESTA
ARC
Multi-Nuclear Spectroscopy
Spectro Analysis GE
Enhanced DWI
IDEAL
Dual Drive
DISCO
HyperSense
Synthetic DWI

Body & Breast

LAVA-XV
LAVA-FLEX
Body (LAVA) Navigator
IDEAL IQ
MRTOUCH (MRE)
VIBRANT-DE
Breast Single Voxel Spectroscopy
Probe 3D Prostate

Cardiac & Vascular

Fluoro-triggered MRA
TRICKS
Inhance 3D Velocity
Inhance 3D Inflow IR
Inhance 2D Inflow
Inhance DeltaFlow
Tagging
MR-Echo
CINE IR
3D Heart
Phase-Sensitive MDE
Black Blood SSFSE
MDE Plus
3D Cine
4D Flow
Cardiac T1 Mapping
Cardiac T2 Mapping

Neuro, Spine & MSK

Spectroscopy/ PROBE
ProbePRESS
BRAVO
Cube T2
T2 PROPELLER
DW PROPELLER
Diffusion Tensor
FiberTrak
BrainStat AIF
3D ASL
SWAN (T2Star Weighted Angiography)
BrainWave RT
BrainWave PA
T2MAP
MAVRIC SL
FOCUS
PROMO
Silent MR
Silent MRA
Silent T2 Propeller
Silent DWI
CUBE Double-IR
MAGiC
HyperBand (DTI)
HyperCUBE

Third-Party Applications

General

rtHawk (HeartVista)

Body & Breast

MR Elastography (Mayo)
Steam-CSI (UCSD)
Lipoquant (UCSD)

Neuro, Spine & MSK

Clearpoint(TM) Neuronavigation

Prototype Applications

Body & Breast

IDEAL IQ (Research)
Navigated LAVA
Renal BOLD

Cardiac & Vascular

PC-VIPR
CE-MRA-XV
SSD-FIESTA
2D Cardiac IDEAL
3D Cardiac IDEAL