SPECT/CT Comparison Chart

CompanyGE HealthcarePhilips HealthcareSiemens HealthcareSiemens HealthcareSiemens HealthcareSiemens Healthcare
Product nameDiscovery NM/CT 670Infinia Hawkeye 4BrightView XCTSymbia T16Symbia T6Symbia T2
FDA cleared, year20092006Yes200720052005
CE marked, year200920062008200720052005
SPECTYesYesYesYesYesYes
FDG-SPECTYesYes (only on 1 configuration); UHEHR collimators also available forsimultaneous Tc / FDG imagingNoNoNoNo
Coincidence imagingNoYesNoNoNoNo
Angular sampling, increm.2 degrees2 degrees1.4 to 90 degrees1.4 degrees1.4 degrees1.4 degrees
Attenuation correctionYesYesCT-ACYes – Diagnostic CTYes – Diagnostic CTYes – Diagnostic CT
Application featuresN/SN/SFIT (full iterative technology) for PET and SPECT; co-planar SPECT/CT; Astonish low-dose imaging with PET-like resolutionCardiac and general purpose SPECT/CT applications, calcium scoring, attenuation correction using fast diagnostic quality CT attenuation map. Standalone 16-slice diagnostic CT applicationsCardiac and general purpose SPECT/CT applications, calcium scoring, attenuation correction using fast diagnostic quality CT attenuation map. Standalone 6-slice diagnostic CT applicationsCardiac and general purpose SPECT/CT applications, calcium scoring, attenuation correction using fast diagnostic quality CT attenuation map. Standalone 2-slice diagnostic CT applications
Key features that differenciate this system from its competitionThe Discovery NM/CT 670 brings together newly designed NM detectors, new wide bore gantry, and the BrightSpeed Elite multi-detector CT with LightSpeed VCT technology insideN/S0.33 mm isotropic voxels for high resolution CT; concurrent Imaging of up to 15 simultaneous acquisitions16-slice diagnostic CT; Autoform technology; HD detector; Flash 3-D image reconstruction; industry leading NEMA sensitivity; cardiac scans at 2x the normal speed with half the dose; productivity features, such as automated collimator changer and automated quality control; unlimited gurney imaging with detector tilt6-slice diagnostic CT; Autoform technology; HD detector; Flash 3-D image reconstruction; industry leading NEMA sensitivity; cardiac scans at 2x the normal speed with half the dose; productivity features, such as automated collimator changer and automated quality control; unlimited gurney imaging with detector tilt2-slice diagnostic CT; Autoform technology; HD detector; Flash 3-D image reconstruction; industry leading NEMA sensitivity; cardiac scans at 2x the normal speed with half the dose; productivity features, such as automated collimator changer and automated quality control; unlimited gurney imaging with detector tilt
Detector Characteristics
Crystal dimen., in (cm)N/S(59.7 x 45.7)18.5 x 23.3 in. (47 x 59.3 cm)59.1 x 44.559.1 x 44.559.1 x 44.5
Thickness, in (mm)3/8 (9.5) or 1 (25.4)3/8 (9.5) or 1 (25.4)3/8 ( 9.5); 3/4 (19.1)9.5 or 15.9 mm9.5 or 15.9 mm9.5 or 15.9 mm
Number of PMTs5959 (3/8″) or 95 (1″)5959 per detector59 per detector59 per detector
Diameter, in (cm)3/8: 53 x 3″ (7.6 cm) and 6 x 1.5″ (3.8 cm)3/8: 53 x 3″ (7.6 cm) and 6 x 1.5″ (3.8 cm)49, 3 in. (7.6 cm); 10, 2 in. (5 cm)
Digital detector & pixel dimensionsYes & ADC per PMTYes, 1 ADC/PMT, radial-based iterative positioningBialkali high-efficiency box-type dynodesBialkali high-efficiency box-type dynodesBialkali high-efficiency box-type dynodes
DETECTOR PERFORMANCE
UFOV, in (cm)21.26″ x 15.75″ (54 x 40cm)21.25″ x 15.75″ (54x40cm)16 x 21.25 in.(40.6 x 54 cm)53.3 x 38.7 cm53.3 x 38.7 cm53.3 x 38.7 cm
Max count rate, cps> 460 kcps460 kcps350,000310,000 cps310,000 cps310,000 cps
Dead time, usecN/S0.51.30.0120.0120.012
Energy range, keV40 – 620 keV40-511 keV for 3/8″; 40-620 keV for 1″56 – 920 keV
Intrinsic spatial res., mm
FWHM, CFOV<3.8 mm3.8 mm / 4.5 mm3/8″-3.3 mm; 3/4″-4.3 mm< 3.8 mm< 3.8 mm< 3.8 mm
FWHM, UFOV<3.9 mm3.9 mm / 4.5 mm3/8″-3.3 mm; 3/4″-4.3 mm< 4.1 mm< 4.1 mm< 4.1 mm
FWTM, CFOV<7.1 mm7.1 mm / 8.3 mm3/8″-6.3 mm; 3/4″-8.0 mm< 7.5 mm< 7.5 mm< 7.5 mm
FWTM, UFOV<7.2 mm7.2 mm / 8.5 mm3/8″-6.3 mm; 3/4″-8.0 mm< 7.8 mm< 7.8 mm< 7.8 mm
Extrinsic spatial res. (LEHR)
FWHM at 10 cm, mm7.4 mm7.43/8″-7.4 mm; 3/4″-7.9 mm< 7.5 or < 8.3 w/scatter< 7.5 or < 8.3 w/scatter< 7.5 or < 8.3 w/scatter
FWTM at 10 cm, mmN/SN/A3/8″-14 mm; 3/4″-14.8 mm< 13.6 or < 18.6 w/scatter< 13.6 or < 18.6 w/scatter< 13.6 or < 18.6 w/scatter
System sensitivity, LEHR1601703/8″-168; 3/4″-188202202202
Intrinsic energy resolution FWHM, 140 keV<9.8%9.80%3/8″-9.6%; 3/4″-9.8%9.90%9.90%9.90%
Intrinsic spatial linearity, mm
Differential CFOV<0.2 mm0.13/8″-0.09; 3/4″-0.15< 0.2< 0.2< 0.2
Differential UFOV<0.2 mm0.13/8″-0.1; 3/4″-0.2< 0.2< 0.2< 0.2
Absolute CFOV<0.5 mm0.53/8″-0.35; 3/4″-0.4< 0.4< 0.4< 0.4
Absolute UFOV<0.5 mm0.53/8″-0.5; 3/4″-0.6< 0.7< 0.7< 0.7
Intrinsic uniformity, correctedN/SN/AN/SUncorrected valuesUncorrected valuesUncorrected values
Integral UFOV<3.6 %3.60%2.50%< 3.7< 3.7< 3.7
Differential UFOV<2.3 %2.30%2.00%< 2.7< 2.7< 2.7
GANTRY FUNCTIONS
Detector/yoke motionIn/out, Lateral and swivel motions, both detectors together or each separatelyIn/out and lateral motionIn/out; rotate; caudal/cephalic tilt; up/downDetector orientations in degrees: 76, 90, 180; outer room,wheel chair,sitting, standing,gurney/bedDetector orientations in degrees: 76, 90, 180; outer room,wheel chair,sitting, standing, gurney/bedDetector orientations in degrees: 76, 90, 180; outer room,wheel chair,sitting, standing, gurney/bed
Whole-body scan, cm/minUp to 100 mm/sUp to 300 cm /min1-1903-600 cm/min3-600 cm/min3-600 cm/min
WB modeN/SN/ASingle passContinuousContinuousContinuous
Continuous scanNoYesYesYesYesYes
Step and shoot methodYesYesNoYesYesYes
Contouring (SPECT/WB)Real-time automatic contouring (no need for pre-scan contour learning)Real-time automatic contouring (no need for pre-scan contour learning)Fully automatic or semi-automaticAutomatic body contourAutomatic body contourAutomatic body contour
Yoke rotation, deg0-90-180-270N/A540550550550
Radius, in (cm)min 10 cm, max 35 cmmin 3.9″ ( 10 cm ) max 12.2″ (31 cm)0-40 cm (0-15.75″)9.5-35 cm w/LEHR9.5-35 cm w/LEHR9.5-35 cm w/LEHR
Detector rotation, deg.0-45-90-1800-90-180-270225Max.CW410,max.CCW140Max.CW410,max.CCW141Max.CW410,max.CCW142
Detector offsetN/SN/A< 0.25 pixel (64×64)< 0.25 pixel (64×64)< 0.25 pixel (64×64)
Clearance to floor, max.N/S62 cm168.4 cm (66.3″)110.5110.5110.5
Clearance to floor, min.N/S20 cm34.8 cm (13.7″)48.348.348.3
Collimator storage/exchangeYes, collimator storage/exchange device combined. Productivity, ease of use and safety; both collimators removed/replaced during one exchange sessionYes, collimator storage/exchange device combined. Productivity, ease of use and safety; both collimators removed/replaced during one exchange sessionSemi-automatic cart-basedAuto collimator changerAuto collimator changerAuto collimator changer
CT Physical Assembly
Type of detectorBrightSpeed Elite 16CdWO4 detectors mounted on a slip-ring driven rotorHigh res flat panelUFC Ultra Fast CeramicUFC Ultra Fast CeramicUFC Ultra Fast Ceramic
Number elements/channels/fan beam1,776 channels per row3,145,728 (binned to 786,432)23,552 (16 x 1,472) channels8,832 (6 x 1,472) channels2,688 (16 x 1,472) channels
Generator output53.2 kW350 Watts10 kW, pulsed 2 msec to continuous50 kw50 kw40 kw
kV-Range/mA-Range80,100,120,140 kV/10-440 mAMax mA for small focal spot 120, 140 keV 1-2.5 mA; Max mA for large focal spot Sequential multi-spot scanning mode 1-2.5 mA. Maximum mAs 35120 kVp; 5-80 mA80, 110, 130 kv80, 110, 130 kv80, 110, 130 kv
Anode heat storage/cooling/min.Heat Storage: 6.3 MHUCooling not relevant600 kHU max anode storage; 1,350 HU/sec max anode cooling5.0 MHU5.0 MHU3.5 MHU
Tube focal spot [mm]Small 0.7 x 0.6 large 0.9^2focal spot size: 2 mm x .2 mm0.4 x 0.4 mm; 0.8 x 0.8 mm0.8 x 0.5/7 – 0.8 x 0.7/70.8 x 0.5/7 – 0.8 x 0.7/70.8 x 0.4/7 – 0.8 x 0.7/7
Gantry dimensions, cmLWH: 220 x 218 x 203210 x 212 x 97 cm (H x W x D)
Gantry weight, kg (lb)4,200 kg6,172 lbs (2,800kg) (includes display arm and heaviest collimators)2,041 kg (4,500 lbs)
CT Image Quality
LC resolution (20 cm Catph./ Surface)5 mm @ 0.3% at 13.3 mGy; 3 mm @ 0.3% at 37.2 mGy4 mm5 mm @ 0.5% with 40 cm slice thickness
CTDI (dose/100 mAs) B/ 16 cm Phant.Head 19.6 mGy, Body 9.9 mGy3 mGy/100 mAs21.5 mGy/102 mAs19.7 mGy/100 mAs19.7 mGy/100 mAs
Max HC resolution (2% MTF)X/Y 15.4, Z 19.6 lp/cm15 lp/cm @ 10% MTF17. 5lp/cm,0.29 mm @ 0% MTF17.5 lp/cm,0.29 mm @ 0% MTF15.5 lp/cm,0.29 mm @ 0% MTF
Standard HC resolution (2% MTF)X/Y 8.5, Z 19.6 lp/cm5 lp/cm @ 10% MTF15.6 lp/cm15.1 lp/cm14 lp/cm
CT Scan Parameters
Scan times (partial)/subsec (partial)1,920 slices/min0.33, 0.4s (240 degrees)0.4, 0.53s (240 degrees)0.53, 0.67s (240 degrees)
Scan field, cm50 cm45 cm, 56.5 cm WFOV SW option47 cm50 cm50 cm50 cm
Number of slices164140 @ 1 mm thick1662
Slice thickness, mm0.625-10 mm5 mm0.33- 2+, all with isotropic voxels0.6-19.2 mm1 – 18 mm1 – 10 mm
Rotation speed0.5-4 sec/full rotation2 or 2.6 rmp12 seconds (5 rpm)0.5-1.5 s0.6-1.5 s0.8-1.5 s
Topogram length, mm160 cm80 cm172 cm184 cm184 cm184 cm
Reconstruction time: std./high res./ topoTypical 6 frames/second10 seconds320 sl <1 min- 512 matrix16 images/second8 images/second5 images/second
Scan matrix/display matrixScan 512, display 1,024Scan 512 x 512; Display 256 x 256, 512 x 512256, 512512 x 512 / 1,280 x 1,024512 x 512 / 1,280 x 1,024512 x 512 / 1,280 x 1,024
Max. spiral volume/max. spiral scan time120 sec520 secNo spiral mode186 cm/100 s168 cm/100 s168 cm/100 s
Console/Computer/Storage
Host computerN/SHP – Intel Xeon MP5130 processorExtended Brilliance Workspacesyngo MI Workplacesyngo MI Workplacesyngo MI Workplace
User interfaceXelerisXelerisWindowsXPGraphical, WindowsGraphical, WindowsGraphical, Windows
Archival storageCD/DVD or PACSHD – 73 GBCD/DVD or Windows shared drive/folder36 GB (OS),147 GB (data)36 GB (OS), 147 GB (data)36 GB (OS),1,47 GB (data)
DICOM 3.0YesYesYesYesYesYes
3-D volume renderingYesYesYesYesYesYes
Report generationYesYesYesYesYesYes
PACS readyYesYesYesYesYesYes
Describe advanced capabilities (list most important first)Volumetrix MI application for SPECT, PET, CT, and MR for 3-D rendering, multimodality fusion, and image registration. Full suite of Xeleris applicationsVolumetrix Suite application for SPECT, SPECT/CT, and PET/CT that expands the capabilities of Infinia Hawkeye 4. Benefits include advanced 3-D visualization and the choice to view virtually any CT registered to NM data all within the NM workflowAstonish reconstruction with attenuation and scatter corrections; integrated registration and fusion softwareSPECT/CT acquisition, processing, fusion, and viewing with one workflow, IQ-SPECT for 5 min. cardiac work-up, Symbia.net client server for anywhere processing and viewing. Flash for half-time imaging, upgradeable, automatic collimator changer and automatic quality controlSPSPECT/CT acquisition, processing, fusion, and viewing with one workflow, IQ-SPECT for 5 min. cardiac work-up, Symbia.net client server for anywhere processing and viewing. Flash for half-time imaging, upgradeable, automatic collimator changer and automatic quality controlSPECT/CT acquisition, processing, fusion, and viewing with one workflow, IQ-SPECT for 5 min. cardiac work-up, Symbia.net client server for anywhere processing and viewing. Flash for half-time imaging, upgradeable, automatic collimator changer and automatic quality control
Room siting and size (min.)12’8″ x 18′ (386 x 549 cm)15’6″ x 11’9″3.73 x 6.30 m3.73 x 6.30 m3.73 x 6.30 m

updated 4.7.25

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