The computerized tomography is an important method to investigate inner structures not only in medical diagnostics but also for testing materials. Thereby the principles of the generation of tomographic images are independent of the measuring method. Beside the well known procedures X-ray or NMR (nucleus magnetic  resonance) also other measurement readings like positron emission tomography or ultrasonic tomography will be recorded. Our ct-scanner realizes the rotation and the linear shift of a sample piece, which is the precondition for the calculation of tomographic images. In connection with the ct-control unit and the ultrasonic device GAMPT-Scan one can built a computer tomograph which is very versatile.
The scanner has a sample holder for the interesting objects. This sample holder will be rotated exactly with a stepper motor. A second stepper can realize a linear shift with a local resolution  < 10 µm. The sample holder will dip into a water filled tank. On the outside of this tank two ultrasonic probes are localized in opposition. During the measurement the holder will be moved between the probes corresponding to the ct-algorithm. The whole holder can be moved vertically, so the interesting area of the sample is adaptable.
Furthermore the scanner enables a series of experiments to illustrate the generation of cross section images. Therefore a Gampt ultrasonic probe (1,2 or 4 MHz) is attached to the sample holder. The sample object (i.e. test block or breast dummy) is placed into the bath and then scanned with assistance of the scanner control unit. The scanner can be controlled manually or with the delivered software. The recorded B-scans are free of motion artifacts and have a high local resolution, the quality can be improved by increasing the measurement time.

Technical data:
Linear movement: ~400 mm, resolution <10 µm
speed maximal 18 cm/min
Rotation  360°, resolution 0.225°
speed maximal 1 rotation/s
Size   500 x 400 x 200 mm

stop position switch, maintance free sliding bearing