Host Computer - GE LightSpeed 16 Product Data Sheet

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Product Data Sheet – rev 4.2
July 4th 2003
Page 14
• Heat Storage Capacity: 6.3 MHU
• Heat Dissipation:
• Anode (max) 840 KHU/min
• Casing (cont) 300 KHU/min
• Tube Unit: 6.9 kW continuous for 10
minutes
• Dual Focal Spots:
• Small Focal Spot:
0.7 mm (W) x 0.6 mm (L) nominal
value
(IEC 336/93)
0.9 mm (W) x 0.7 mm (L) traditional
methodology
• Large Focal Spot:
0.9 mm (W) x 0.9 mm (L) nominal
value
(IEC 336/93)
1.2 mm (W) x 1.2 mm (L)
traditional methodology
• Maximum Power: 53.2 kW
• Beam collimated to 55° fan angle.
Average time to replace tube: < 10 hours
High Voltage Generation
• High-frequency on-board generator.
Continuous operation during scan.
• 53.2 kW output power.
• kVp: 80, 100, 120, 140
• mA: 10 to 440 mA, 5 mA increments
Maximum mA for each kVp selection:
KVp Max mA
80 400
100 420
120 440
140 380
HiLight Matrix II Detector:
21,888 individual elements composed by: 8
rows of 1.25 mm thickness and 16 rows of
0.625 mm thickness, each containing 888
active patient elements; 24 reference
elements.
4 typical modes of data output:
• 8 x 1.25 mm (uses center 16 rows)
• 8 x 2.5 mm (uses all 24 rows)
* Option
LightSpeed
With Xtream
CT Scanner System
• 16 x 1.25 mm (uses all 24 rows)
• 16 x 0.625 mm (uses center 16 rows )
70% geometric efficiency; 98% absorption
efficiency.
Data Acquisition System
12,288 available input channels.
1,640 Hz maximum sample rate.
Effective analog to digital conversion range
greater than two million to one.
Scan/Control Unit
Located in base of Operator Console.

Host Computer

• Dual SMP 2.66.GHz Intel Xeon processors
with 512KB L2 cache.
• Intel Hyper-threading technology.
• 2GB DDR266 Dual Channel Memory with a
throughput of 4.2GB/sec
Image Processor:
• Nvidia Quadro4 980XGL AGP 8X graphics
with 128MB Memory
• Graphics Processor Unit (GPU) Clock
300Mhz
• Graphics Memory Clock 325Mhz
Image Reconstruction Engine
(GRE)
•
Custom-designed special purpose
CT Image Generator
•
Custom CT back projection hardware
accelerates 2D & 3D back projection.
•
Intel Hyper-threading Technology.
•
32-bit floating point data format
•
2GB DDR226 ECC Dual Channel
Memory Standard (4.2 GB/sec).
Software Architecture:
• Software architecture based on industry
standards and client-server design
GE Medical Systems-America
Milwaukee, USA - Fax: 1 414 544 3384
GE Medical Systems-Asia:
16
Tokyo, Japan - Fax: 81 425 85 5490
Hong Kong - Fax: 852 2559 3588
GE Medical Systems-Europe
Peripherals:
Total of 254 GB system:
• Main system (host) disk drive:
• High Performance Drive
• 36 GB, 3.5 inch form factor
• 15,000 RPM
• Ultra320 SCSI interface
• Assigned to applications software and
image files
• 2 system disk drives (Image Disk)
• High Performance Drive
• 73 GB, 3.5 inch form factor each.
• 15,000 RPM
• Ultra320 SCSI interface
• Assigned to image files only
- 250,000 uncompressed 512 images
• Scan data disk drive:
• High Performance Drive
• 36 GB, 3.5 inch form factor
• UltraSCSI interface
• Scan data disk drive:
• High Performance Drive
• 36 GB, 3.5 inch form factor
• UltraSCSI interface
• Standard MOD drive:
• Magnetic Optical Disk Drive
• Erasable, rewritable media
• 2.3 GB, 3.5 inch form factor
• Assigned to DICOM 3.0 format image
file.
• Stores 4,700 lossless JPEG compressed
512 image files per side
• Off-line retrieval of image. Images may
be viewed as soon as they are restored
from MOD
• DVD Ram :
• 4.7 GB per side, 5.25" half height form
factor
• Transfer rate 2.7MB/sec
• Assigned to scan data file and protocol
file storage/retrieval.
• Color monitors :
• 21 inch diagonal width
• 1280 x 1024 dot resolution
• Non-interlaced, flicker-free presentation
• 76 kHz Horizontal deflection frequency