Computed tomography
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Same X-ray machine. Two measuring systems
with computed tomography module
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Records the 2D projections of an object illuminated by X-rays within a few minutes. During the recording of the 2D-projections, the e-learning software visualises the back-projection process in two or three dimensions alternatively. After the scan the complete 3D-object is available to be viewed (rotating, zooming, transparency effects, projections, illumination similar to the Heidelberger ray-tracing model).
Well-resolved images of various objects can be obtained in spite of the simple measuring method and the low energy of the x-ray radiation (35 keV) from the educational x-ray apparatus. The 3D-computed tomogram of various objects can be evaluated qualitatively and quantitatively. The learning involved in the preparation of the scanning process and image evaluation is emphasised.
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Download experimental sheets:
P6.3.8.4 Determining absorption coefficients and Hounsfield units with computed tomography with the computed tomography module
with the X-ray image
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Compact high-resolution image sensor with ethernet connection for direct capturing X-ray images with an X-ray apparatus at daylight conditions (without X-ray film and fluorescent screen ). Together with the precision rail (554 8291), the digital image sensor is a high performance camera for X-ray photography, radiology, crystallography and computed tomography for use in practical trainings and demonstrations at universities.
The X-ray images can be saved as grey scale image in full resolution or they can be used for 3D reconstruction of the irradiated object with the computed tomography software. Such reconstruction is done live while capturing the images within minutes. The sensor is inserted with the precision rail (554 8291) into the experiment chamber of the X-ray apparatus. The X-ray image is captured indirectly, as the radiation is first converted with a scintillator foil into a viewable, analogue, intermediate image and then with a large CMOS sensor into a digitalised image. The CMOS sensors used here have proven themselves thousands of times and for over 10 years in industrial applications, e.g. in non-destructive material testing, production control and in medical engineering. Used in an X-ray apparatus they also provide high-resolution radiography images up to CT scans.
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