High frequency x-ray generator is widely used in the production of high frequency x-ray machine as its core component, and in the upgrading of the machine. Its maximum output power is 16kW; the current range of the photographic tube is 32mA to 200mA, voltage range of the photographic tube is 40kV to 125kV, I2T range is 0.32mAs to 160mAs. The product has the following features:
a) Analog and digital dual-loop high precision controls;
b) High precision photographic time control;
c) High precision tube current control;
d) Ionisation chambers automatic exposure control (AEC);
e) A variety of photography options;
f) Self-protection and self-diagnosis;
g) LCD console control, friendly man-machine interface, simple operation, and multiple modes;
h) Software update and maintenance through the Internet.
With the features above, the product is an ideal high frequency x-ray generator widely used in pet hospitals.
2.1 Components and dimensions of the product
This model consists of a high frequency high voltage generator and a console as shown in Figure 1:
Figure 1 Components of High Frequency X-ray Generator
Figure 2 Dimensions of Generator
Figure 3 Dimensions of Console
2.2 Operating principle of the device
2.2.1 Block diagram of the system
Figure 4 Block Diagram of the System
2.2.2 Operating principle
When the power switch of the device is turned on, the AC voltage is converted into DC voltage through the wave filter, solid-state relay, and rectifier of the high frequency and high voltage generator. The DC voltage is then applied to the inverter. The inverter inverts the DC voltage into high frequency AC voltage greater than 30 kHz and then applies the AC voltage to the step-up transformer and rectifier in the high-voltage oil tank to convert the high frequency AC voltage into DC voltage from 40kV to 125kV. The high DC voltage is supplied to the x-ray tube to cause the x-ray tube to produce x-rays.
The x-ray tube voltage is controlled by the central controller, and the current flowing through the tube is controlled by the filament heating unit.
Each mode of operation and control can be selected through selection and setting on the console. The radiation dose of x-rays is controlled by setting the conditions of photography on the console.
Move the photographic table so that the lesion falls within the x-ray radiation range. The flat panel detector receives x-ray photons and directly transmit the digital information through the cable to the image processing system for the doctor to process the image and identify the lesion more quickly.