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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
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
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
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
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
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
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 |