New radiation protection material: high specific gravity tungsten alloy
As a new type of ray protection material, high specific gravity tungsten alloy has been widely used in all kinds of CT, linear accelerator, PET, γ camera and other medical equipment, can provide better ray protection and beam guidance.
Strong ray shielding ability: under the condition of the same thickness, the ray shielding ability of tungsten alloy is more than 1.7 times that of lead. When the ray is stronger, the difference in ray shielding ability between the two is more obvious.
Good shaping, machinability and weldability; Compared to lead, which is toxic, the high weight tungsten alloy has environmental protection properties, that is, tungsten alloy shielding parts are not harmful to human safety.
Tungsten alloy linear accelerator refers to the tungsten alloy ray shielding component used for medical linear accelerator, which can shield the high-energy X-ray produced by the accelerator in clinical radiotherapy and the neutron ray produced by the interaction between the X-ray or electron beam on the target and the injected material.
Medical electron linear accelerator (LINac) is one of the most important radiotherapy equipment for tumor treatment. It is inevitable that it has certain radiation (X ray and neutron ray). If it is not shielded properly during use, it is bound to cause radiation pollution to the surrounding environment, and then damage the doctors and patients concerned. Therefore, the radiation protection of accelerator must be done well. Among them, material shielding, as one of the basic methods of radiation protection, has been paid more and more attention, especially to environmentally friendly ray shielding materials with high specific gravity tungsten alloy.
The high specific gravity tungsten alloy collimator is a collimator made of high specific gravity (high density) tungsten base alloy, which is arranged with a certain number of holes. According to the form of the hole drilled, the high specific gravity tungsten alloy collimator can be divided into high specific gravity tungsten alloy parallel hole type collimator, high specific gravity tungsten alloy focused type collimator, high specific gravity tungsten alloy divergence type collimator and high specific gravity tungsten alloy pinhole type collimator.
Gamma rays emitted by radiation sources in the body are isotropic, and the SPECT system's detectors receive radiation in a range of 360 degrees, so the image is messy and does not reflect the correct distribution of radionuclides in the body. The role of the high specific gravity tungsten alloy collimator is to carry out spatial positioning of the gamma ray, only allow the ray in a specific direction within a specific Angle range through, so that the ray emitted from the human body and each hole of the collimator to establish a corresponding relationship. Among them, tungsten alloy has a certain absorption and shielding effect on γ rays, which can reduce the harm of rays to human body.
High specific gravity tungsten alloy syringe protective sleeve refers to the syringe protective sleeve made of high specific gravity tungsten alloy, a new type of ray shielding material with good shielding effect on radioactive particles, which is used for drug administration protection in nuclear medicine.
The imaging agents used in PET/CT scans are ultra-high energy positron emission nuclides, and medical staff are exposed to varying degrees of external radiation when performing injection operations on patients. Therefore, it is necessary to reduce occupational exposure during injection and transport of PET imaging agents. Tungsten alloy syringe protective sleeve is mainly designed to protect the staff's upper limbs and hands from external irradiation during the injection of 18F-FDG and other PET imaging drugs, as well as the external irradiation during transport. Tungsten alloy syringe protective sleeve is suitable for 1cc, 2cc, 5cc and 10cc syringes.
