CT MACHINE COMPARISON CHART
GE LightSpeed RT 16 vs. Philips Brilliance 16-slice (8.0 MHU)
| CT Scanner Model | > LightSpeed RT 16 | > Brilliance 16-Slice |
| Company | GE Healthcare | Philips Healthcare |
| FDA Clearance/ CE Mark | YES, 2008 (both) | YES |
| Intended Use | Treatment planning, bariatrics & general radiology (including CTA and CTC) | Neuro, general radiology |
| >> GANTRY | ||
| Geometry | Rotate-rotate, slip ring | Rotate-rotate, 16-slice |
| Detectors, type | HiLight, ceramic matrix II | Solid-state GOS |
| Detector width | 20 mm | 0.75 mm |
| # of rows | 24 | 16 |
| Reconstructed slice width options (mm) | 0.625, 1.25, 2.5, 3.75, 5, 7.5, 10 | 0.6 – 12 |
| Elements per row | 912 | 672 |
| # of detection elements | 21,888 | 16,128 |
| Rotation times, sec., 360° | 0.5, 0.6, 0.7, 0.8, 0.9, 1, 2, 3, 4 | 0.5, 0.75, 1, 1.5, 2; 0.4 |
| Partial | N/A | 0.28, 0.33 (240) |
| X-ray fan beam angle | 55 degrees | 57 degrees |
| Gantry tilt | 30 degrees | +/- 30 degrees |
| Gantry dimensions (cm) (H x W x D) | 189 x 223 x 101 | 203 x 239 x 94 |
| Gantry weight | 1920 kg | 1764 kg |
| Gantry aperture | 80 cm | 70 cm |
| Scan localizer | Laser | Laser |
| CT Scanner Model | > LightSpeed RT 16 | > Brilliance 16-Slice |
| >>X-RAY TUBE | ||
| X-ray tube anode | N/S | N/S |
| Heat storage, HU | 8,000,000 | 8 (MRC technology) |
| Dissipation rate, HU/min | 1,782,000 | 1608 kHU |
| Tube cooling | Oil/air | Oil/air |
| Tube focal spot (mm) | 1.2 x 1.2 to 0.9 x 0.7 | Small 0.5 x 1, large 1 x 1 |
| Optional x-ray tubes | N/A | N/S |
| >>X-RAY GENERATOR | ||
| kW output | 100 | 60 |
| kVp range | 80, 100, 120, 140 | 90, 120, 140 |
| mA range | 10 to 800 | 20 to 500 in 1 mA increments |
| >>SPIRAL SCANNING | ||
| Max scan time | 120 seconds | 100 seconds |
| Max scan volume | 170 cm (200 option) | 175 cm |
| Spatial resolution, lp/cm | Same as axial | Up to 24 |
| Pitch | 0.5625, 0.9375, 1.375 | 0.2 to 1.7 |
| Reconstruction time per image | Up to 16 ips | N/S |
| >>PATIENT TABLE | ||
| Vertical | 43 to 99.1 cm | 58 to 103 cm |
| Longitudinal | 170 cm (200 option) | 190 cm |
| Scannable range | 170 cm (200 option) | 175 cm |
| Max load capacity w/ accuracy (kg) | 650 lb or 500 lb +/-0.25mm | 204 +/-0.25 |
| >>IMAGE RECONSTRUCTION | ||
| Computer CPU | Open architecture (LINUX) | Intel, Windows OS |
| Scan FOVs | 10 to 50 | Up to 50 |
| Reconstruction matrices | 512 x 512 | 512×512; 768×768; 1024×1024 |
| Reconstruction time, sec | Up to 16 ips | N/S |
| Per slice, sec | As fast as 0.063 | Up to 20ips w/ 3-D cone beam |
| For localization scan, sec | Real time | N/S |
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| CT Scanner Model | > LightSpeed RT 16 | > Brilliance 16-Slice |
| >> DISPLAY | ||
| Monitor size | 2 – 19 inch LCD | 19 inch LCD |
| Matrices | 1280 x 1024 pixels | 1280 x 1024 pixels |
| Range of CT numbers | -1024 to 3072 | -1024 to 3072 |
| Image enlargement | Up to 8x | Available |
| Maximum # of slices displayed at once | 16 | 1,000 w/ scrolling |
| >> IMAGE STORAGE | ||
| Hard disk, MB | 73 GB | 146 GB |
| # of online images | 250,000; 512 x 512 matrix | 250,000 |
| Archival storage | 8.5 GB DVD-R/CD-R | DVD-RAM, CD-R |
| >>RADIATION DOSE | ||
| Dose-modulation technique | SmartmA- 3-D dose modulation | DoseRight ACS DoseRight D-DOM DoseRight Z-DOM |
| Pediatric-specific dose control | Color coding for kids | Pediatric protocols |
| Prospective ECG gating | N/A | Available |
| Retrospective ECG | N/A | Available |
| >>PERFORMANCE | ||
| Min. inter-scan time, sec | 1 | 0.5 |
| Dynamic scan rate scans/min. | 960 | 2284 |
| High-contrast spatial res. | 15.4/8.5 | Ultra-high resolution |
| 0% MTF, lp/cm | 15.4 | 24 |
| 50% MTF, lp/cm | 8.5 | 8 |
| Low contrast resolution (mm at % at 4 rads) | 5 at 0.3% at 13.3 mGy; 8 in CATPHAN | 4 at 0.3% |
| Noise (% at 2.5 rads) | 0.32 at 2.85 rads | 0.27 |
| CT Angiography | Standard (MiP) | Available |
| CT Simulation | Optional | Available |
| 3-D Package | Optional | Available |
| DICOM 3.0 interface | YES | YES |
| Additional features | Wide-bore, multi-purpose capabilities such as routine scans, interventional procedures, radiation therapy planning and scan trauma. Other features: AutoScan, AutoFilm, AutoVoice, AutoArchive, AutoTransfer, SmartPrep, ProtocolPro, View/Edit Wizard, DynaPlan Plus, ImageWorks, ProView, remote tilt, in-room start, rear gantry control, breathing lights, SmartView fluoro option | N/S |
The Bottom Line: The GE LightSpeed 16-slice has features that separate itself from the Philips product. GE has a higher Kw rating (100) and mA (800). The GE also offers a higher scan at 120 seconds, compared to Philips’ at 100 seconds. However, the Philips Brilliance 16 system is much more affordable, possibly saving someone around 20 to 30% compared to the GE unit. If these differences, features or any other items on this comparison chart do not make a difference for your specific application, then the Philips system may prove to be a scanner that will fall within your price range.
