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The Applications of Cancer Treatment Tungsten Radiation Shielding

During cancer radiation treatment, tungsten alloy radiation shielding can be used in cancer treatment tungsten radiation shielding of radiation therapy equipments, such as multileaf collimators (MLC), collimator, linear accelerator, computed tomography(CT), X-ray energy absorptiometry,and gamma knife.

How Cancer Treatment Tungsten Radiation Shielding Works?

Most components of radiation shielding for treatment are tungsten alloy sheet based applications with a thickness range of about 0.1mm to 1.5cm. Cancer treatment tungsten radiation shielding helps to shape the beam of radiation emerging from the machine and can limit the maximum field size of a beam.

Providing the works of multileaf collimator as an example. An electric motor moves each individual tungsten alloy sheet in the collimator to the correct position – with up to 120 tungsten alloy sheets being used to shape the outline of the tumor with millimeter accuracy. Then, the tumor is exposed to high energy radiation. During this process, the tumor is radiated by turning the gantry with tungsten alloy multileaf collimator 360°around the patient. To protect the surrounding healthy tissue, a highly precise tungsten alloy multileaf collimator is necessary.

Why Use Cancer Treatment Tungsten Radiation Shielding?

Due to tungsten alloy materials has high density, which is 60% higher than lead, reduces the size of tungsten alloy ray shields, without affecting the radiation shielding effect the excellent radiation absorption of tungsten alloy. The sensitive of cancer treatment tungsten radiation shielding is much higher than radiation shielding produced by lead in the limit area. Since the environmental friendly characteristics of tungsten alloy, tungsten alloy for radiation shielding better than lead for radiation shielding in environmental protection.

During design of shielding, tungsten alloy radiation shielding is calculated according to requirements of shield to abate the multiple shielding materials' thickness.
Formula: K=e0.693 d / △1/2
K: Shield weakened multiple
△ 1/2: The tungsten alloy radiation shielding material of the half-value layer values

 

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