Hitachi X-ray machine tu5 1 Fault code f4 1

Hitachi X-ray machine tu5 1 Fault code f4 1

X-ray machine editor

X-ray machine is a device for generating X-rays, which is mainly composed of X-ray tube, X-ray machine power supply and control circuit. The X-ray tube is composed of cathode filament, anode target and vacuum glass tube. The power supply of X-ray machine can be divided into two parts: high-voltage power supply and filament power supply. The filament power supply is used to heat the filament, and the high-voltage output end of the high-voltage power supply is clamped at both ends of the cathode filament and the anode target respectively. High-voltage electric field is provided to accelerate the active electrons on the filament to flow to the anode target, forming a high-speed electron flow. After bombarding the anode target, 99% is converted into heat, and 65,438+0% produces X-rays due to Compton effect.

Chinese name

X-ray machine

x ray detector

German physicist Roentgen

X-ray wavelength

About 0.00 1 ~ 100 nm

Inventor of x-ray machine

Russell Reynolds

Medical application scope

X-ray interventional diagnosis, chest fluoroscopy, radiography, etc.

catalogue

Principle and structure of 1X-ray machine

The discovery of x-rays

X-ray characteristics

Application of X-ray in medicine

Brief history of medical x-ray equipment development

2 Large X-ray machine function

3 Technical parameters of X-ray machine

high pressure generator

X-ray tube support

Photographic flat bed

Chest photo frame

Portable x-ray machine

Medical portable x-ray machine

X-ray machine for industrial inspection

Belt inspection x-ray machine

Inventor 5

Principle and structure editing of 1X-ray machine

Principle and structure of X-ray machine

Schematic diagram of Notting X-ray machine

The discovery of x-rays

1895 german physicist roentgen (W.C.R? Ntgen) When studying the gas discharge phenomenon in cathode-ray tubes, a sealed glass tube with two metal electrodes (one is called anode and the other is called cathode) is used, tens of thousands of volts of high-voltage electricity is applied at both ends of the electrodes, and the air in the glass tube is pumped out by an air extractor. In order to cover the light during high voltage discharge (an arc lamp), the glass tube is covered with a layer of black cardboard. When he was doing this experiment in a dark room, he happened to find a piece of cardboard soaked in barium platinum cyanide solution emitting bright fluorescence two meters away from the glass tube. Further experiments show that cardboard, wooden boards, clothes and books with a thickness of about 2000 pages can't stop this fluorescence. Even more surprising, when I reached for this fluorescent cardboard with my hand, I saw an image of a hand bone on it.

At that time, Roentgen decided that it was a kind of invisible ray, but it could penetrate the object. Because we can't explain its principle and don't know its nature, we borrowed the unknown "X" in mathematics as the code name, which is called "X-ray" (or X-ray or X-ray for short). This is the discovery of X-ray and the origin of its name. This name has continued to this day. To commemorate this great discovery of Roentgen, later generations named it Roentgen Ray.

The discovery of X-ray is of great significance in human history, which has opened up a brand-new road for natural science and medicine. For this reason, Roentgen won the first Nobel Prize in Physics at 190 1.

Science is always developing. After repeated practice and research by Roentgen and scientists all over the world, the essence of X-ray is gradually revealed, and it is proved that it is an electromagnetic wave with extremely short wavelength and great energy. Its wavelength is shorter than that of visible light (about 0.00 1 ~ 100 nm, and the wavelength of X-rays used in medicine is about 0.00 1. 0. 1 nm), its photon energy is tens of thousands to hundreds of thousands times larger than that of visible light. Therefore, in addition to the general properties of visible light, X-rays have their own characteristics.

X-ray characteristics

physical effect

1. Penetration refers to the ability of X-rays to pass through a substance without being absorbed. X-rays can penetrate substances that ordinary visible light cannot penetrate. Because visible light waves are long, their energy is very small. When it touches an object, part of it is reflected, most of it is absorbed by matter, and it cannot penetrate the object. On the other hand, x-rays are not. Because of their short wave length and high energy, when they shine on matter, only a part of them are absorbed by matter, and most of them pass through the gaps between atoms, showing strong penetration ability. The ability of X-rays to penetrate matter is related to the energy of X-ray photons. The shorter the wavelength of X-ray, the greater the photon energy and the stronger the penetrating power. X-ray penetration is also related to the density of matter. Substances with high density absorb more X-rays and transmit less. Low density has less absorption and more penetration. Using the characteristics of differential absorption, soft tissues such as bones, muscles and fat with different densities can be distinguished. This is the physical basis of X-ray fluoroscopy and photography.

2. When the ionized substance is irradiated by X-rays, the electrons outside the nucleus leave the atomic orbit, which is called ionization. In the process of photoelectric effect and scattering, the process in which photoelectrons and recoil electrons leave their atoms is called primary ionization, and the process in which these photoelectrons or recoil electrons collide with other atoms in the process of traveling is called secondary ionization. In solids and liquids. Ionized positive and negative ions will recombine quickly and are not easy to collect. The forgotten charge in gas is easy to collect, and the X-ray exposure can be measured by ionizing charge: the X-ray measuring instrument is made according to this principle. Due to ionization, gas can conduct electricity; Some substances can react chemically; Various biological effects can be induced in organisms. Ionization is the basis of X-ray injury and treatment.

Fluorescence is invisible because the wavelength of X-ray is very short. However, when it irradiates some compounds such as phosphorus, platinum barium cyanide, zinc cadmium sulfide, calcium tungstate and so on. The atom is excited by ionization or excitation. When the atom returns to the ground state, it radiates visible light or ultraviolet light due to the energy level transition of valence electrons. This is fluorescence. X-rays make substances fluoresce, which is called fluorescence. The intensity of fluorescence is directly proportional to the number of x-rays. This function is the basis of X-ray application in perspective. This fluorescence can be used for X-ray diagnosis, making fluorescent screen, intensifying screen, input screen of image intensifier, etc. Fluorescent screen is used to observe the image of X-rays passing through human tissues during fluoroscopy, and intensifying screen is used to enhance the sensitivity of film during photography.