Three-dimensional conformal Irradiation unit of heavy ion beam on tumour target area
A heavy ion beam and three-dimensional conformal technology, which is applied in the field of heavy ion beam irradiation devices in the biomedical field, can solve the problems of low conformal degree, scatterers reduce beam quality, and the proportion of healthy tissues is reduced. , to achieve a high degree of conformity, reduce the probability of normal tissue complications, and reduce the effect of normal tissue complications
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Embodiment 1
[0026] The present invention takes the chemically etched solid nuclear track detector CR39 sheet as an example to illustrate the three-dimensional conformal irradiation of the heavy ion beam on the target area composed of the CR39 sheet.
[0027] Utilize the 80.55MeV / u carbon ion beam provided by Lanzhou Heavy Ion Research Facility (HIRFL) of Institute of Modern Physics, Chinese Academy of Sciences, we scan the magnet in the present invention at the HIRFL shallow layer tumor heavy ion therapy terminal equipped with passive beam distribution system The uniform irradiation field formed by the system and the mini ridge filter were used to test the broadening of the beam Bragg.
[0028] Such as figure 1 As shown, the device for performing three-dimensional conformal irradiation therapy on tumor target area with heavy ion beam, including scanning magnet system 1, beam current monitoring system 2, mini ridge filter 3, range shifter 4, multi-leaf collimator 5 and the patient's body ...
Embodiment 2
[0033] Using the device described in Example 1 to implement three-dimensional conformal radiation therapy on the tumor target area, the present invention is a phantom stacked with tissue-equivalent material CR39 thin slices (thickness 0.66mm, water equivalent length coefficient 1.061) As an example, to illustrate the three-dimensional conformal irradiation of a carbon ion beam to a target area composed of CR39 flakes.
[0034] Integrating all the devices in the present invention has carried out three-dimensional conformal irradiation on the phantom stacked by tissue equivalent material CR39 thin slices, and the tumor slice is seven slices thereof, such as Figure 7 As shown in the middle left figure, along the beam penetration direction, the tumor slices are circles with diameters of 10mm, 20mm, 30mm, 40mm, 30mm, 20mm and 10mm. In the irradiation, the scanning frequency of the scanning magnet system in 1x direction is 75Hz, the scanning frequency in the y direction is 45Hz, th...
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