University of Wisconsin–Madison

Equipment

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D710

GE Discovery PET CT D710

GE Discovery PET CT D710

The GE Discovery PET/CT 710 (D710) is an ACR-accredited PET/CT scanner (GE Healthcare, Waukesha WI) located in room B1331 of the Wisconsin Institutes for Medical Research (WIMR). It was installed in 2013. It acquires PET and CT images for clinical and research purposes, with a schedule from 8:00 AM to 5:00 PM, Monday through Friday. The gantry bore diameter is 70 cm with a spatial resolution of about 4.5 mm. The PET system collects data in 3D mode and can reconstruct images with or without time-of-flight (TOF) and point-spread function modeling (SharpIR). It has options for cardiac and respiratory (Varian RPM) gating. A CT injection system (Medrad Stellant, Bayer) is available for CT contrast injections.

DVCT

GE Discovery VCT

GE Discovery VCT

The GE Discovery VCT (DVCT) is an ACR-accredited PET/CT scanner (GE Healthcare, Waukesha WI) located in room B1248 of the Wisconsin Institutes for Medical Research (WIMR). It was installed in 2009. It acquires PET and CT images for clinical and research purposes, with a schedule from 8:00 AM to 5:00 PM, Monday through Friday. The gantry bore diameter is 70 cm with a spatial resolution of about 5 mm. The PET system is capable of collecting data in 2D and 3D modes with options for cardiac and respiratory (Varian RPM) gating. The scanner has an option for oncology treatment planning that includes a flat table top and external laser lights (DORADO Simulation Laser System, LAP). A CT injection system (Medrad Stellant, Bayer) is available for CT contrast injections.

PET/MR

GE Signa PET/MR

GE Signa PET/MR

WIMRPETMR1 is a PET/MR scanner (GE Signa PET/MR, GE Healthcare, Waukesha WI), consisting of a 3 T MRI system with an integrated PET scanner, located in room B1258B of the Wisconsin Institutes for Medical Research (WIMR). It was installed in 2015. It is capable of simultaneous acquisition of PET and MR images for clinical and research purposes, with a schedule from 8:00 AM to 5:00 PM, Monday through Friday. The maximum gradient strength of the MRI system is 33 mT/m, and the time necessary to reach this maximum strength is 276 microseconds, for a gradient slew rate of 120 mT/m/msec. The system has 32 receivers and a variety of radiofrequency transmit and/or receive coils. The bore diameter is 60 cm. The PET system contains state-of-the-art silicon photomultiplier (SiPM) detectors, and can reconstruct images with or without time-of-flight (TOF) and point-spread function modeling (SharpIR). The extended S/I coverage (25 cm) of the PET system results in improved detection sensitivity, which may allow for reduced doses of radiopharmaceuticals. Attenuation and scatter corrections are achieved through MR-based or atlas-based attenuation correction methods. The PET spatial resolution is approximately 4.0 mm. Cardiac and respiratory gating is possible for both PET and MR imaging. Learn more about 3.0T MR technology and the available coils at our MRI Research page.

DIQ

GE Discovery IQ

GE Discovery IQ

The GE Discovery IQ is a PET/CT scanner (GE Healthcare, Waukesha WI) located in room 1142 of the American Family Children’s Hospital (AFCH). It was installed in 2015. It acquires PET and CT images primarily as a clinical resource. The gantry bore diameter is 70 cm with a spatial resolution of about 4.5 mm.  Its large axial field-of-view (25 cm) results in exceptional detection sensitivity, potentially allowing for reduced injected doses. The PET system collects data in 3D mode and can reconstruct images with or without point-spread function modeling (SharpIR). It has options for cardiac and respiratory (Varian RPM) gating. A CT injection system (Medrad Stellant, Bayer) is available for CT contrast injections.

Dose Calibrators

Capintec CRC 25R dose calibrator

Capintec CRC-25R Dose Calibrator

Two dose calibrators are available for radionuclide activity measurements: a Capintec CRC-25R located in the Wisconsin Institutes for Medical Research (WIMR), and a Biodex Atomlab 500 located in American Family Children’s Hospital (AFCH). PET scanners and dose calibrators are cross-calibrated on a quarterly schedule with monthly cross-calibration checks.

Gamma Counter

PerkinElmer gamma counter with integrated screen

PerkinElmer WIZARD2
Automatic Gamma Counter

The WIZARD2 Automatic Gamma Counter model 2480 (PerkinElmer) is located in room B1104 in the Wisconsin Institutes for Medical Research (WIMR). This highly sensitive well-type NaI (Tl) detector can be used to automatically measure radioactivity levels for multiple vials or tubes (up to 20 mL per vial) for clinical or research purposes.

Phantoms

clear cylindrical fillable plexiglass form with inset fillable spheres

PET phantom, used for clinical
calibrations and research purposes

Several PET phantoms are available for clinical calibrations and research purposes. These include cylindrical uniformity phantoms (20 cm x 20 cm), the ACR-approved image quality phantom, the NEMA IEC PET Body Phantom, NEMA PET Sensitivity Phantom, NEMA PET Scatter Phantom Set, and devices for measuring PET spatial resolution.

Learn about the Small Animal Imaging Facilities

System Specifications

System Name Discovery VCT
PET/CT
Discovery 710
PET/CT
Signa
PET/MR
Discovery
IQ
Manufacturer General Electric General Electric General Electric General Electric
Installation Date 2009 2013 2015 2015
Location B1248 WIMR B1331 WIMR B1258B WIMR 1142 AFCH
Phone Number 5-8732 5-8732 2-6115 890-9675
PET Subsystem
Detector Technology PMT PMT SiPM PMT
Crystal Material   BGO LBS
(Lutetium-based scintillator)
LBS BGO
Number of Crystals 13440 13824 20160 not available
Crystal Size 4.7 × 6.3 × 30
mm3
 4.2 × 6.3 × 25 
mm3
4.0 × 5.3 × 25
mm3
not available
Acqusition Modes 2D
3D
3D
3D+Time-Of-Flight
3D
3D+Time-Of-Flight
3D
Reconstruction Algorithms FBP
2D/3D OSEM
FBP
OSEM
SharpIR
TOF
OSEM
SharpIR
TOF
OSEM
SharIR
Q.Clear
Resolution NEMA 2001 NEMA 2007 NEMA 2007 NEMA 2012
(w/OSEM)
Transaxial @ 1 cm 5.0 mm (2D)
5.0 mm (3D)
4.7 mm 4.0 mm 4.5 mm
Transaxial @ 10 cm 5.7 mm (2D)
5.6 mm (3D)
5.1 mm 5.7 mm 5.4 mm
Axial @ 1 cm 4.8 mm (2D)
5.6 mm (3D)
5.0 mm 5.2 mm 4.8 mm
Axial @ 10 cm 5.9 mm (2D)
5.9 mm (3D)
5.5 mm 7.5 mm 6.0 mm
Plane Spacing 3.27 mm 3.27 mm 2.78 mm 3.26 mm
Number of Axial Image Planes 47 47 89 79
Axial FOV 15.7 cm 15.7 cm 24.7 cm 25.8 cm
System Sensitivity  9.1 cps/kBq (3D)   7.0 cps/kBq 22.5 cps/kBq 20.8 cps/kBq
Timing Resolution (ps) 5500 560 400 not available
Scatter Fraction  19% (2D)
35% (3D)
37% 44% 40%
Reconstructed Image Sizes  128×128
256×256
128×128
192×192
256×256
128×128
192×192
256×256
128×128
192×192
256×256
CT Subsystem
Number of Slices 64 64 n/a 16
Physical Parameters
Patient Port Diameter 70 cm 70 cm 60 cm 70 cm
Patient Scan Range 170 cm 200 cm 188 cm 200 cm