利用MCNPX 构建准确的医科达Synergy加速器6MV治疗头蒙卡模型，根据CT值与物质密度的关系将ATOM 物理体模的CT转换为用于MCNPX计算的体素模型，模拟患者在X （γ）射线全身照射过程中常用的水平照射方式中全身的剂量分布，并将模拟结果与热释光剂量计在ATOM 物理体模内不同位置处的测量值进行对比分析其差异。结果表明，标准源皮距下6MV加速器治疗头模型在水模体中计算的百分深度剂量曲线和离轴剂量曲线与医院的实际测量值差异性均＜2%，其中10cm×10cm射野下的最大剂量点深度约为15cm，与实际测量值相符。全身照射中体模内不同位置处剂量的模拟结果与热释光剂量计测量值的最大差异性约为6%，MCNPX的模拟结果与热释光的测量结果基本符合。MCNPX 较精确地模拟计算患者全身照射的剂量分布，蒙特卡罗模拟为全身照射过程中患者全身剂量的均匀性优化提供了可能。
", "ds_source": "利用MCNPX 构建准确的医科达Synergy加速器6MV治疗头蒙卡模型，根据CT值与物质密度的关系将ATOM 物理体模的CT转换为用于MCNPX计算的体素模型，模拟患者在X （γ）射线全身照射过程中常用的水平照射方式中全身的剂量分布，并将模拟结果与热释光剂量计在ATOM 物理体模内不同位置处的测量值进行对比分析其差异。
", "ds_process_way": "蒙特卡罗模拟和体素模型分析数据
", "ds_quality": "良好
", "ds_acq_start_time": "2017-01-01 00:00:00", "ds_acq_end_time": "2019-12-31 00:00:00", "ds_acq_place": "甘肃兰州", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 5504115, "ds_files_count": 2, "ds_format": "pdf", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "bfc991bd-0f24-452c-98ab-4522970590a0.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "9971252d-7beb-4464-bc08-bdcc5a1d7dd1", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [], "quality_level": 3, "publish_time": "2023-12-27 11:29:29", "last_updated": "2024-01-03 17:21:08", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.NCDC.IMP.DB4141.2023", "i18n": { "en": { "title": "Monte Carlo simulation of whole body dose distribution in patients with total body X(γ)ray irradiation", "ds_format": "", "ds_source": "MCNPX was used to build an accurate Monka model of the 6MV treatment head of MEDA synergy accelerator. According to the relationship between CT value and material density, the CT of the atom physical phantom was converted into a voxel model for MCNPX calculation, and the X-ray image of the patient was simulated（ γ） The simulation results were compared with the measured values of TLD at different positions in the atom phantom, and the differences were analyzed.
", "ds_quality": "Good
", "ds_ref_way": "", "ds_abstract": "MCNPX was used to build an accurate Monka model of the 6MV treatment head of MEDA synergy accelerator. According to the relationship between CT value and material density, the CT of the atom physical phantom was converted into a voxel model for MCNPX calculation, and the X-ray image of the patient was simulated（ γ） The simulation results were compared with the measured values of TLD at different positions in the atom phantom, and the differences were analyzed. The results show that the difference between the percentage depth dose curve and the off-axis dose curve calculated by the 6MV accelerator head model in the water phantom under the standard source skin distance and the actual measured value in the hospital is less than 2%, and the difference is less than 10 cm × The depth of the maximum dose point is about 15cm under the field of 10cm, which is consistent with the actual measured value. The maximum difference between the simulated results of dose at different positions in the phantom and the measured values of TLD is about 6%. The simulated results of MCNPX are basically consistent with the measured results of TLD. MCNPX can accurately simulate and calculate the dose distribution of whole body irradiation. Monte Carlo simulation provides the possibility to optimize the whole body dose uniformity of patients in the whole body irradiation process.
", "ds_time_res": "", "ds_acq_place": "Lanzhou, Gansu", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Monte Carlo simulation and voxel model for data analysis
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "全身照射", "蒙特卡罗模拟", "剂量均匀性", "热释光剂量计" ], "ds_subject_tags": [], "ds_class_tags": [], "ds_locus_tags": [ "兰州", "甘肃省" ], "ds_time_tags": [ 2019 ], "ds_contributors": [ { "true_name": "肖国青", "email": "xiaogq@impcas.ac.cn", "work_for": "中国科学院近代物理研究所", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "肖国青", "email": "xiaogq@impcas.ac.cn", "work_for": "中国科学院近代物理研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "肖国青", "email": "xiaogq@impcas.ac.cn", "work_for": "中国科学院近代物理研究所", "country": "中国" } ], "category": "其他" }