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The SkyScan 1178 is an ultra-fast micro-CT system for high throughput
in-vivo and in-vitro scanning of small laboratory animals, and for
material science / process control applications. The X-ray scanner
contains two source-detector pairs on a rotational gantry which
allows objects to remain static during scanning. Up to 5 dual-processor
computers on a local network can reconstruct the full 3D-volume
directly during acquisition. The typical scanning+reconstruction
cycle for 512x512x512 pixels cubed with 160µm pixel size is less
than 75 seconds. The instrument is supplied with full physiological
monitoring for in-vivo scanning of small animals, including colour
real-time imaging of the animal during the scan. The scanner can
be operated in full automatic mode from a single front panel pushbutton.
SPECIFICATIONS:
| SYSTEM:
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SkyScan 1178 Ultra-fast In-vivo/In-vitro scanner
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| Scanning
area |
82mm in diameter, 210mm in length (82x82x82mm
cube can be scanned and reconstructed in a single scan)
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| X-Ray
sources |
one
or two sealed air-cooled X-ray tubes 20-65kV, 40W each
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| X-Ray
detectors |
one
or two 1280 x 1024 x 12bit digital x-ray cameras, typical
exposure is 140ms, min.exposure is 20ms
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| Reconstruction
arrays |
full isotropic cube of 512x512x512 @ 160µm
pixel size or
1024x1024x1024 @ 80µm pixel size
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| Scanning
time |
26sec for 160µm pixel size, 1.26deg. rotational steps,
2 source camera pairs
115sec for 80µm pixel size, 0.72 deg. rotational
steps, 2 source camera pairs
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| Scanning+Reconstruction
cycle |
45sec for 512x512x512 pixels volume (160µm
pixelsize) or <8min for 1024x1024x1024 pixels volume (80µm
pixels). Parallel Reconstruction is performed during the subsequent
sample scan.
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| Host
computer |
Dual Intel-Xeon 3.8GHz, 800MHz system bus,2GB
RAM, 400GB HDD, DVD+RW, 20-inch UltraSharp LCD screen, integrated
Gigabit (10/100/1000) network, two digital frame-grabbers,
one color analogue frame-grabber, Windows-XP Professional
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| Reconstruction
computers |
1, 2, or 4 Dual Intel-XEON 3.80 GHz, 800MHz system
bus, 2GB RAM (2GB in the configuration with 2PCs, 4GB in the
configuration with one PC), integrated Gigabit (10/100/1000)
network, Windows-XP Professional
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| Interconnection
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network
switch for communication between host and reconstructor PCs, monitor/mouse/keyboard
switch
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| Software
package |
Scanner control with simultaneous acquisition from
two cameras, data distribution for several " node reconstruction"
PCs during acquisition, simultaneous volumetric (cone-beam)
reconstruction of full scanning volume by up to 5 PCs through
network with collection of all results by host-computer. 2D
/ 3D image processing and analysis, 3D-rendering, virtual
manipulation of reconstructed object. All results calibrated
in HU.
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| Data
formats |
BMP for results and 3D-movies, conversion
to TIFF, JPG, AVI, WMV, DICOM
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| Reconstruction
algorithm |
Networked
multi-thread reconstruction by modified Feldkamp algorithm with volumetric
(cone-beam) geometry
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Radiation safety |
<1µSv/h
average during full scan at 20cm from the instrument surface
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| Installation
requirements |
Power: 100-240V/3A/50-60Hz (auto-switching), temperature:18-25°C,<
70% Relative Humidity, non condensing
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| Size/Weight |
Desk top scanner 1250 x 700 x 720mm / 140Kg + 2 to
5 computers, monitor, keyboard, mouse
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| Animal
holder |
User interchangeable carbon composite object
beds 77mm and 36mm in diameter, 300mm in length. All systems
supplied with additional bed adapter for use with PET or SPECT
systems in multimodal research
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| X-ray
energy selection |
Continuously
variable peak energy 20 to 65kV for both sources, X-ray filtering -
Al 0.5mm
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| Physiological
monitoring subsystem |
Miniature color TV-camera with white LED
illumination for real time visualization of animals during
scanning, Real-time localised body movement detection for
non-contact scanning synchronization with breathing, Air /
gas flow sensor for scanning synchronization with breathing,
Sensor for animal body temperature measurement, Animal heating
by warmed airflow over the object bed, ECG-amplifier with
adjustable sensitivity for adaptation to different size of
animals, x-ray tranparent carbon-fiber ECG connectors and
electrodes on the animal's body, Software package for animal
physiological monitoring (temperature measurement and stabilization,
body movement detection, pulse rate measurement for breathing
and heart activities, etc.), gating of scans synchronized
to localised body movements / breathing / heart rate.
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