The bone densitometer Density is a planar scanner, consisting of a fixed table and a "U" arm, which moves along the longitudinal direction, from the foot to the patient's head (X axis).
On the arm is mounted an assembly generator - RX detector, mechanically aligned so that the collimated beam of x-ray centers perfectly the detector.
Generator and detector shift simultaneously along the transverse direction (Y-axis), by means of a transmission belt and gears.
In this way an X-Y scanning in a specific region of interest of the patient is realized.
During the movement along the Y axis, one or more lines of an X-ray attenuated image are acquired, while the translation along the X axis only serves the purpose of positioning to the next line.
The electronics consists of three subsystems: an X-ray generator, a detector and a control unit. The latter implements the acquisition of the signals coming from the detector, the control of movement (engines, keyboard, limit switch), the emission control rays, the emergency stop and the communication with the workstation.
Thank to its new layout, to the new x-ray source and to the advanced processor used, the scan speed is reduced down to 80s for fast exam and 120s for standard setup (AP spine). A whole body scan may take down to about 6 minutes.
On the workstation, typically a commercial Windows PC, is installed the software, which is the only interface between operator and machine excluding a keyboard for the movement of the arm (mounted on the machine), the button for the 'emergency stop and the power switch.
The software has been specifically designed to be easy to use, developed from the operator's point of view, which are provided a set of automated tools that make it simple and quick operations.
Special attention was paid to the design of the machine, which presents innovative features such as the one-piece solid aluminum frame and the suspended arm to the table. The mechanical design has considered not only the aesthetic appearance, being absolutely original, but also the optimization of a series of constructive aspects of the machine, such as ease of installation and maintenance (cost reduction), essentiality, noise and vibration, weight and stability, etc. The open space underneath the table permits to easily access any part of the machine for maintenance and for cleanings, improving the sanitation of the room where the unit is installed.
The design of the densitometer Density model taking into account all these aspects is in the process of 3 international patents.