Nuclear medical radiation shielding：
tungsten alloy(heavy alloy) is ideal for shielding against X rays
and gamma radiation. The very high density of tungsten shielding
(more than 60% denser than lead) allows a reduction in the physical
size of shielding components, without compromising their rigidity
or the effectiveness of the shielding characteristics.
tungsten heavy alloy shielding is used in applications such as
collimator, nuclear shielding, beamstop, PET syringe shield, vial
shield, isotope container, FDG container, multi leaf collimator
etc.
Positron emission tomography (PET)
Positron emission tomography (PET) is one of the nuclear medicine
techniques available for diagnosis. Whilst X-rays provide
information on the structure of the body, PET shows the chemical
function of a particular organism. PET involves the injection of
FDG (a glucose-based radionuclide) from a shielded syringe into the
patient. As the FDG travels through the patient’s body it emits
gamma radiation which is detected by a gamma camera, from which the
chemical activity within cells and organs can be seen. Any abnormal
chemical activity may be a sign that tumours are present.
PET scans are frequently used to detect cancerous tumours and
diseases of the brain and coronary arteries.
Applications for tungsten alloy shielding in PET include:
PET syringe shield |
Tungsten vial shield |
Tungsten FDG transport container |
Collimator for gamma camera |
Technetium generator |
Multi leaf collimator
Radiotherapy destroys cancer by directing beams of radiation
directly onto the tumour. The beams of radiation require a very
fine focus to avoid harming the surrounding healthy tissue. This
focus is achieved by using a multi-leaf collimator , consisting of
two rows of very thin tungsten alloy plates, which can be
configured to exactly match the dimensions of the tumour.
Dimensions:
Balls: 2mm above
Shafts2mm aboveLength max.600mm）
SheetsThickness 0.15mm aboveWideness max.200mmLength max.500mm）
Square, round and rectangle sizes: diameter 550mm above
According the demanding
