New ray protection material: high gravity tungsten alloy
As a new type of ray protection material, tungsten heavy alloy has been widely used in various kinds of CT, linear accelerator, PET, γ camera and other medical equipment, it can provide better ray protection and beam guidance.
What are the excellent properties of high specific gravity tungsten alloy used in new ray protection materials?
First, the specific weight of tungsten heavy alloy: 18.8g/cm3 high density;
Second, tungsten heavy alloys are better at shielding from radiation: tungsten is 1.7 times better than lead at the same thickness. Moreover, the higher the radiation intensity, the more obvious the difference in shielding ability between high gravity tungsten alloy and lead is.
Thirdly, tungsten heavy alloy has good shape, machinability and weldability. Compared to lead, which is toxic, the high density tungsten alloy is environmentally friendly, which means that the tungsten alloy shield is not hazardous to human safety.
Various uses of high specific gravity tungsten alloy ray protection materials:
High gravity tungsten alloy linear accelerator
Tungsten alloy linear accelerator is also a tungsten alloy ray shielding part used in medical linear accelerator. Tungsten heavy alloy can shield the high-energy X-ray produced by the accelerator during clinical radiation therapy and the neutron rays generated by the interaction between the bremsstractient radiation produced by the X-ray or electron beam on the target material and the emitted material.
Medical electron linear accelerator is one of the important radiotherapy equipment for the treatment of tumor. Because of X-ray and neutron rays, it is inevitable to have certain radiation. Therefore, if the shielding work is not done well in the process of use, it is bound to cause radiation pollution to the surrounding environment, and then cause damage to the doctors and patients concerned. Therefore, it is very necessary to do well the radiation protection of accelerator. Among them, material shielding, as one of the basic methods of radiation protection, has been paid more and more attention, especially the environmental protection radiation shielding material of high gravity tungsten alloy.
High gravity tungsten alloy collimator
Collimators made of high specific gravity (high density) tungsten alloy are called high specific gravity tungsten alloy collimators. The heavy tungsten collimator is lined with a number of holes. According to the type of hole drilled, high specific gravity tungsten alloy collimator can be divided into high specific gravity tungsten alloy parallel hole collimator, high specific gravity tungsten alloy focusing type collimator, high specific gravity tungsten alloy divergent type collimator and high specific gravity tungsten alloy pinhole type collimator.
The gamma rays emitted by radiation sources in the human body are isotropic, and the SPECT system's detectors, which receive radiation in the 360 degree range, create a chaotic image that does not accurately reflect the correct distribution of radionuclides in the body. The role of high specific gravity tungsten alloy collimator is to carry out spatial positioning of gamma rays, only allowing the rays in a specific direction and a specific Angle range through, so that the rays emitted from the human body and the collimator each hole to establish a corresponding relationship. Among them, tungsten alloy has a certain absorption and shielding effect on gamma rays, which can reduce the harm of gamma rays to human body.
Protective sleeve for high gravity tungsten alloy syringe
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 radiation shielding material with good shielding effect on radioactive particles, which is applied to the drug delivery protection of nuclear medicine.
The imaging agents used in PET/CT scans are ultra-high energy positron emission nuclides, and medical workers are exposed to varying degrees of external radiation when injecting patients. Therefore, it is necessary to reduce the occupational dose during the injection and transport of PET imaging agents. The protective sleeve of tungsten alloy syringe is mainly designed for the external irradiation protection of the upper limbs and hands of the staff during the injection of 18F-FDG and other PET imaging drugs, as well as the external irradiation protection during transport. Tungsten alloy syringe protective sleeve is suitable for 1cc, 2cc, 5cc and 10cc syringe models.
