
Tungsten alloy is a safe and reliable radiation shielding material that can replace the traditional radiation shielding material lead for parallel-hole collimator – the most commonly used collimator for stationary SPECT imaging in hospitals. As a new type of radiation shielding material, tungsten alloy has many advantages such as high strength, good processability, no secondary bremsstrahlung radiation, and environmental protection for applications of parallel-hole collimator. Also, the thickness of tungsten alloy is only 2/3 of lead to obtain the same…