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KMID : 1151820210150060849
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Journal of the Korean Society of Radiology
2021 Volume.15 No. 6 p.849 ~ p.853
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Development of the Radiological Range of Positron Emitting Radionuclides
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Jang Dong-Gun
Lee Sang-Ho
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Abstract
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PET images used in medical diagnoses are created using positron emitting radionuclides. The radiation used for imaging is generated at 0.511 MeV by p-annihilation. The CSDA range is the distance the particle radiation flew physically, and it is different from the range shown in PET images. This study proposes a novel method that uses radiological criteria to measure this range. The experiment was conducted by applying the MCNP6 simulation to positron emitting nuclides 18F, 11C, 13N, and 15O. Radiological criteria were based on the location of the p-annihilation event, which is also the image signal. Results showed the radiological range of positrons to be 2.3, 3.9, 5.0, and 7.9 mm for 18F, 11C, 13N, and 15O, respectively. The higher the positron energy, the larger its difference from the CSDA range. Positron emitting nuclide is being developed and studied as a nuclide for dosimetry or radiotherapy. Further research needs to be conducted into various positron ranges.
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KEYWORD
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Positron , Ranges , PET
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