CEFLA NewTom 5G, User Manual, Page: 31 / 110

4 Getting started
4.1.4 Device Operation
A patient is made to lay down on the patient table and centered by means of 2 laser modules and "scout
view" images.
The scanning system performs a completely rotation around the patient. Radiological images are acquired,
that are then automatically processed by the system.
The result is the slices set that forms the reconstructed volume. At the end of this process the axial slices set
composes the
Volumetric Data. Through these data it is possible to display coronal and sagittal views of the
reconstructed volume in real time.
After defining a Region Of Interest (ROI), from the volumetric data the user can start the creation of a study .
The ROI can be inclined from the volumetric data both to obtain perpendicular images and to correct
positioning errors.
Working on the study data it is possible to create panoramic, transaxial and 3D images. You can also work
on these kinds of images measuring distances, angles, putting comment etc.
Finally new images can be saved inside the study.
The study images can be used to compile a report , that can be then printed and/or saved on a physical
support.
To study in deep these themes please refer to the ”NNT User Manual” document
4.2 Working principle
According to the cone-beam technology, the source detector system performs a single rotation around the
patient's head, simultaneously acquiring every necessary data for the volumetric reconstruction. Data
acquired each scan step are the digital images corresponding to the radiographic projection. The raw data
set so collected is used in the volumetric tomographic reconstruction process.
The advantages compared to a traditional technique are:
✔
Direct reconstruction of any set of the scanned object points without passing through axial
reconstruction and data re-formatting.
✔
Total scan time related to the acquisition electronics, rather than to the x-ray tube power and the
mechanics, usually shorter;
✔
Under same conditions of total scan time, less requirements in regards to the source/tube assembly
power and scan mechanics, with constructive and maintenance advantages.
NewTom 5G – User Manual 4-3