g 
Product Data Sheet – rev 4.2 
July 4th 2003  
Page 2 
 
 
 
LightSpeed
  
With Xtream 
CT Scanner System 
GE Medical Systems-America 
Milwaukee, USA  - Fax: 1 414 544 3384 
GE Medical Systems-Asia: 
Tokyo, Japan - Fax: 81 425 85 5490 
Hong Kong - Fax: 852 2559 3588 
GE Medical Systems-Europe 
•  SmartPrep, standard on LightSpeed
16
, 
provides software for real-time monitoring of 
contrast enhancement. 
•  Prospective or retrospective image 
reconstruction of 0.625 mm, 1.25 mm, 
2.5 mm, 3.75 mm, 5 mm, 7.5 mm or 10 
mm images from inherently thinner 
acquisition data sets; 
Peripheral Run-Off
 
Coverage 1,400 mm 
Rotation 0.5 sec. 
Mode  16 x 1.25 mm 
Pitch 1.75:1 
mA 380 
mAs 190 
Speed 70 mm/s 
Scan Time  20 seconds 
•  * Direct3D, makes 3D routine and instant 
by building the 3D model during axial image 
reconstruction, reducing the need for user 
interaction. 
•  For both helical and axial acquisitions. 
•  Image decomposition to: 
•  * SmartScorePro, provides EKG-gated 
hardware and software on the Advantage 
Workstation for coronary artery calcium 
scoring. 
•  Retrospective reconstruction of thin 
images from data sets where thicker 
images were initially reconstructed; 
•  Facilitates more detailed image analysis 
without need for re-scans; 
 
•  * CardiacSnapShot, provides software 
and hardware to perform EKG-gated 
reconstructions of the heart in SnapShot 
Segment mode.  
•  Improves 3D visualization; 
•  For both helical and axial acquisitions 
High Resolution Chest
 
•  Up to 2,881 multi-slice 1-sec scan rotations 
stored on disk. Facilitates retrospective 
image decomposition during off hours. 
Coverage 200 mm 
Rotation 0.5 sec. 
Mode  16 x 0.625 mm 
Pitch 1.75:1 
mA 440 
mAs 220 
Speed 35 mm/s 
Scan Time  5.7 seconds 
- SnapShot Segment is a single sector 
protocol using information from one heart 
cycle to generate an image with temporal 
resolution of 250ms.   
•  Eight fundamental scan modes to simplify 
the inherently complex nature of multi-slice 
helical scanning. 
- SnapShot Burst is a multi-sector protocol 
using up to two sectors from two different 
heart cycles to produce an image with 
temporal resolution of 125ms.   
•  Standard set of clinically- proven 
protocols derived from leading luminary 
sites around the world. Up to 8,460   
protocols can be edited, modified and stored 
on the system. 
- SnapShot Burst Plus is a multi-sector 
protocol using up to four sectors of data 
from four different heart cycles to produce 
images with temporal resolution to 65ms.   
The net result is that in many cases, helical 
scans on the Lightspeed
16 
are up to 12 times 
faster than 4-slice CT systems. With the 
Lightspeed
16
, users can routinely use a 0.5 
second scan speed and 0.5625:1, 0.9375:1, 
1.375:1,  and 1.75:1 helical pitches.  This 
added performance, at the same image 
quality, may allow you to: reduce contrast 
media, perform better thin-slice CT 
angiography exams, use thinner slices for 
most exams, and perform longer helical exams 
without tube cooling delays. 
•  Remote Gantry Tilt from the Operator’s 
Console to increase exam speed, including 
built-in safety features to prevent accidental 
contact of the gantry with the patient. 
•  CTDI
w
, DLP (Dose Length Product), and 
Dose Efficiency display during scan 
prescription provides patient dose 
informatbon to the operator. 
•  Built-in patient breathing lights and digital 
counter provides a goal-oriented approach 
to coach the patients in holding their breath 
during an exam. 
Interactive CT Technology 
The  LightSpeed
16 
CT Scanner supplies 
exceptional computer and image processing 
power that significantly enhances clinical 
productivity, building upon the strength of the  
LightSpeed family - true interactive CT 
technology. 
•  SmartStart gantry-mounted start scan 
button and countdown display, facilitates 
single-technologist operation by allowing 
start of scan at the gantry, with a visual 
reminder of time until X-ray initiation. 
The  LightSpeed
16 
delivers this level of 
performance through a balanced design 
that focuses on image quality, coverage, 
and exam speed. 
•  SmartHelical GE proprietary, non-linear 
interpolation algorithms, balance slice 
profile, helical pitch, image noise and 
required technique. 
Main Features 
Interactive CT embodies a variety of design 
choices all striving to enhance operator and 
department productivity. A truly interactive CT 
system will: 
•  Full 360° rotation speed of 0.5 sec. provides 
for improved temporal resolution and image 
quality in areas such as cardiac imaging; 
•  SmartTrack advanced hardware and 
software for X-ray beam tracking minimizes 
patient dose. 
•  Provide a user interface beyond “intuitive” 
to become purely “natural” - from the 
screens to the console hardware itself; 
•  Faster scan times enable shorter breath 
holds and more comfortable exams for 
patients; 
•  SmartTools software automates every 
exam task in order to increase throughput. 
•  Allow two users to review cases side-by-
side, with minimal interference; 
•  Faster scan times reduce the occurrence of 
re-scans by lowering the possibility of 
patient motion during the exam; 
•  SmartBeam
TM
 hardware and software 
optimizes X-ray beam filtration 
independently for body and head 
applications. 
•  Supply a truly multi-tasking environment 
where even advanced image processing 
can take place quickly and simultaneously 
with other processes underway; 
•  Routine scanning with a slice thickness of  
0.625mm - optimizes lesion detection and 
facilitates the use of thinner images for 
volume presentations. 
•  HiRes Chest  software provides a single-
slice, high-resolution scan mode that 
minimizes dose for this critical application. 
•  Operate with a very high degree of 
automation, yet allow patient-specific 
•  Reduced partial volume artifacts: 
* Option