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  • 28 October 2017 Volume 26 Issue 5
      
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  • The Radioactivity Levels of Food and Annual Individual Effective Dose in Areas around Fangcheng Port Nuclear Power Plant before Operation
    FENG Lan-Ying, MA Yi-Long, LEI Jia-Jie, LU Xiu-Fang, ZHOU Yan, XIE Ping, CHEN Zhang-Fan, QIN Zhi-Ying, ZHAO Xin-Chun
    2017, 26(5): 511-514.
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    Objective To investigate and master food radioactivity background levels in the area around the FangChengGang Nuclear Power Plant before operation. And the internal doses of local residents by ingestion were estimated. The work aims to accumulate baseline data for nuclear accident emergency response and health impact assessment, and to provide a scientific basis for the government to formulate emergency measures for nuclear accidents.Methods HP-Ge gamma spectrometer was used to detect and analyze the food collected in the range of 30 km around the nuclear power station.Results 137Cs、238U、226Ra、232Th and 40K were detected in food samples. Their average radioactivity was (0.063±0.252)、(0.146±0.172)、(0.326±0.678)、(1.080±2.139)、(107.7±130.5)Bq/kg;Their Specific activity range were(0.008~2.498)、(0.469~0.821)、(0.007~3.423)、(0.012~9.812)、(30.52~672.1)Bq/kg.Conclusion The radioactivity concentration of food in the surrounding area of Fangchenggang nuclear power station is within the national standard limit, The committed effective dose of all radionuclides by ingestion food is 197.16μSv/a, and man-made 137Cs contributes to 0.158 μSv/year. Its additional dose to the public is below the national limit and will not affect the health of the human body.
  • Inorganic Radiocarbon Concentration in Drinking Water and in-take dose Evaluation of FuJian and HaiNan
    MENG Li-ping, BAO Li, YANG Hai-lan, LI Zhou, SONG Qin-nan, YANG Yu-xuan
    2017, 26(5): 515-517.
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    Objective To evaluate the effects on human health of carbon-14 in drinking water by determining it and estimating the in-take dose.Methods Inorganic radiocarbon concentration in some tap-water and well water samples from Fujian and Hainan province were determined. A simple inorganic radiocarbon measurement procedure was employed, using the bubbling and direct absorption method, followed by low-level liquid scintillation spectrometry.Results The results of sixteen samples showed there was difference in tap-water from different district, and there was difference between tap-water and well waer. The effective dose caused by drinking well water was different from tap-water.Conclusion The effective dose caused by drinking water which was about 10-9 Sv/a, impact on health can be ignored.
  • Investigaed and Analysised of External Exposure dose in Nuclear Medicine Personnel
    JIANG Li-hong, YIN Jun-qing, LIU Yong, ZHOU Jing, ZHANG Wei-jia, ZHU Lan-ying, CHEN Yan
    2017, 26(5): 528-530.
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    Objective To investigate and analyze the occupational external exposure personal dose in shijiazhuang nuclear medical personnel, to master the actuality of external exposure in nuclear medicine personnel and provide the basis on strengthening the radiological protection of nuclear medical personnel.Methods Personal dose equivalent Hp (10) was monitored in nuclear medical personnel through the thermoluminescence dose measurement the relevant data was analyzed.Results There was statistical difference in external exposure dose between the groups that had put thermoluminescence dosimeter outside and inside of the lead clothes (t=2.36, P<0.05), external exposure dose had been reduced 18% for those using lead clothes. There were statistical differences in external exposure dose levels on different posts of nuclear medicine personnel (F=4.01, P<0.05). The dose per person in the cwi group was the lowest (1.66±0.34), and the dose per person in the nurse group was the highest (2.71±2.30); when using lead clothing, there was no difference between the cwi group and the nurse group (F=1.07, P>1.07).Conclusion lead rubber can play a part in protecting nuclear medicine personnel; The radiological protection of nuclear medicine nurses and technicians should be taken seriously.
  • Analyzing the Result of Individual dose of Interventional workers in Wuhan,2009~2016
    SHI Meng-die, WANG Hong, BAI Wen-juan, MIN Zhi-teng
    2017, 26(5): 531-533.
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    Objective To analyze the individual monitoring level and the dynamic change of interventional radiation workers for 17 medical institutions in Wuhan from 2009 to 2016 and provide a reliable basis for ensuring the health of the intervention person's health and the health administration of the administrative department of public health.Methods The monitoring method of thermoluminescence dosemitry was used based on relevant national laws and regulations and relative standards for evaluation.Results The number of intervention staff in wearing personal dosimeters was increased year. The annual dose equivalent per capita is about 0.97 mSv during 8 years, which showed a downward trend year by year; From high dose the composition ratio, the most in 2009, 27.9% and the least in 2014, 3.52%.Conclusion Interventional personnel dose of radiation workers in Wuhan is low and declining, content the requirements of national occupational exposure limits. The intervention personvel's which meets protection consciousness has gradually improved, but personnel involved in the hand external irradiation dose deserves our attention.
  • Analysis of Correlation between Radiation Dose and Health Effect of the Radiation Workers in Jiangmen
    TAN Jian-ming, WU Shao-peng, Niu Shuang-jiao, JIA Yu-xin
    2017, 26(5): 538-540.
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    Objective To investigate the effects of ionizing radiation dose on the health of radiation workers.Methods Radiation workers in general radiology, interventional radiology, nuclear medicine, radiation therapy are regarded as the research objects. From 2015 to 2016 their external exposure individual dose had been monitored, inspected combining with experiment 93 healthy medical staff were selected as the control group.Results The average effective dose of 87.4% radiation workers was less than 1mSv from 2014-2015. Radiation workers engaged in interventional therapy was higher than that of others. The detection rate of blood abnormalities was different for radiation workers. The detection rate of leukocyte abnormality in the intervention group, the detection rate of platelet abnormality in the normal radiation group, the abnormal detection rate of the absolute value of neutrophils in the nuclear medicine group and the radiation therapy group were statistically significant (P<0.05).Conclusion Ionizing radiation has a significant correlation to the abnormalities of bloodstains in radiation workers.
  • Investigation and analysis of the Dose of 160 Cases of Digital Mammography in Guangxi
    LIANG Ting, XIE Ping, CHEN Zhang-fan, CHEN Fa-xiang, DONG Ying, WU Ying-yu
    2017, 26(5): 541-544.
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    Objective To investigate the dose level of direct digital mammography in Guangxi, explore the factors that influence the image quality and dose in direct digital mammography.Methods A survey was carried out on 160 cases of mammography exposure recorded from 4 medical facilities in Guangxi. The personal information, photography posture, breast compression thickness, exposure parameters and the average breast dose (AGD) were collected. ANOVA and non-parametric test were used to analyse the data.Results The mean value of breast compression thickness in the collected 160 mammography parameters was 42 mm, median was 43 mm,the mean value of AGD was 2.0 mGy,median was 1.5 mGy. Significant difference exists in difference breast compression thickness of AGD (F=20.036,P<0.05). Breast compression thickness increases, the higher of AGD. The mean value AGD of MLO was 1.99 mGy, and the mean value AGD of CC was 2.0 mGy.No significant difference in the AGD data was found between the craniocandal and mediolateral oblique (F=0.685,P<0.05).Conclusion The value of AGD in Direct Digital Mammography of Guangxi was hight. Breast compression thickness,different anode/filter combinations and photography conditions have effect on AGD. For the consideration of the abore factors, the dose of the subjects shonld be controlled after the lowest possible leved.
  • The Investigation of the Status of Tianjin Radiation Diagnosis and Treatment Resources in 2016
    LIU Yu-lian, ZHAO Zhi-xin, PENG Chao, WANG Ying, ZHANG Wen-yi, JIAO Ling
    2017, 26(5): 544-547.
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    Objective Through the analysis of Tianjin current radiation institutions, radiation equipment and radiation workers status, it would be helpful to govern the radiation resources and provide reference for the future planning of radiotherapy resources and relevant policies, which can reduce resources congestion.Methods According to the questionnaire survey and relevant literature, the data were summarized and analyzed.Results Totally, there were 632 radiation institutions (licensing rate was 98.10%), 1 453 radiation equipment (clearance rate was 91.74%) and 4 498 radiology staff (licensing rate was 98.13%).Conclusion The general situation of all kinds of resources in Tianjin was good, but the radiation resources per capita were low, which needs to be further improved. Most of radiotherapy resources were concentrated in the six urban districts of Tianjin. As the overall distribution was very uneven, the health administrative departments should pay attention to the balance of medical resources in various regions.
  • Optimization of Radiation Dosage of Urinary Tract Calculus in Xinjiang Muyu Children
    LIU Ying-jun, ZHANG Lian-lian
    2017, 26(5): 548-549,558.
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    Objective To study the feasibility of low dose scanning by studying the CT scan radiation dose of pediatric urinary calculi in Muyu County, Xinjiang Hotan.Methods The images, markers and radiation dose records of 80 children with urinary calculi were retrospectively analyzed. Twenty patients were treated with high dose group (120 kV and 350mAs), and the rest were the low dose, group I (20 cases) 100 kV、350 mAs, group Ⅱ (20 cases) 100 kV、300 mAs, Group Ⅲ 100 kV, 250 mAs. According to a custom standard blindness by the diagnostic physician image quality assessment, excellent、good、poor, excellent and good meet the diagnosis.Results The high dose group images were excellent and the diagnosis was 100%. Low-dose group Ⅰ group Ⅱ which meet the diagnostic rate is also 100%, compared with the high group was not statistically significant. Group Ⅲ which meets the diagnostic rate of 55% of its composition than χ2 test P <0.05. The difference was statistically significant. The CTDIvol points of 100 kV, 350 mAs, 100 kV, 300 mAs, 100 kV and 250 mAs are 13.75, 11.78 and 5.98 mGy, which are 60.20%, 51.58% and 43.13% of high dose CTDIvol.Conclusion Only a low dose of 13% of the high radiation dose (51.58%) of the pediatric urinary stone CT can meet the diagnosis of low dose in the Muyu area worthy of promotion of this low dose scanning.
  • Comparison of Radiation Doses of Different Machines in Standard Coronary Angiography
    JIN YAN-qin, LI Li-hua
    2017, 26(5): 550-551,574.
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    Objective To discuss the radiation dose contrast between heart special FD DSA machine and FD DSA machine in the standard 8 position coronary artery angiography.Methods 50 cases were rearded with siemens AXIOM-Artisdfc heart FD DSA machine while the same samples with GE Tnnova IGS530 FD DSA machine. Todo stardard 8 position coronary artery angiography was done with 15 cm thick organic vireous die line measurement card for the two machines again. And then normal perspective and movie collection was done with 20 cm thick organic vitreous die line measurement card for the two machinesin referfnce point. At last the data was analyzed.Results The value of cumulative dose for simens and GE were 153.7 mGy and 410 mGy respectively. The value of dpse-area product for simens and GE were 11.42 mGy*cm2 and 37.22 mGy*cm2 respectively.Conclusion The radiation dose of the heart FD DSA machine was obviously less than that of the FD DSA machine.
  • Study of the Method for Direct measurement Radionuclides in Human Body
    ZHANG Jian-Feng, LI Ze-shu, TUO Fei
    2017, 26(5): 554-556.
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    Objective To analyzed the types of radionuclides in the body and accurately and measure the activity of radionuclides by whole body counter.Methods Considering the correction of equivalent of muscle wall thickness and tissue thickness, the launched single and mutli-energy gamma-ray radionuclides was applied to calibrate the whole body counter which includes energy and efficiency calibration.Results The method of direct measurement radionuclides' activity is established, which was tested by experiment and provides an effective method to accurately obtain the activity in the human body;Conclusion The method of direct measurement radionuclides in human body is feasible.
  • Application of Delphi Method and Analytic Hierarchy Process in Constructing Index System for Allocation of Nuclear Emergency Medical Resources of Sichuan
    WANG Meng-jie, LIU De-ming, YANG Fei, HE Ling, LI Jia-yuan, GAO Yi-Ying
    2017, 26(5): 562-567,579.
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    Objective To apply the delphi method and analytic hierarchy process to establish a system for allocation of nuclear emergency medical resources of Sichuan,and to provide a scientific basis for evaluating the rescue capability of Sichuan nuclear emergency.Methods Delphi method was used to select the index and establish evaluation index system; AHP was used to determine the weights of the index.Results Through the Delphi method and analytic hierarchy process, the system of allocation of nuclear emergency medical resources in Sichuan province was finally established, including 6 primary indexes, 13 secondary indexes and 85 third grade indexes.Conclusion The index system has reasonable structure and comprehensive contents,reflecting the core information of nuclear emergency medical resource allocation in Sichuan province,which can provide a basis for the application of this index system.
  • Discussion on the Supporting Role of Improving Protection Standard System to Occupational Radiation Hazard Prevention and Control
    CAO Lei, XU Xiao-hong, PENG Hong, HU Lan, DENG Jun, ZHANG Wei-jun
    2017, 26(5): 568-574.
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    Objective The new change of basic standards to the international radiation protection IAEA GSR Part3 "radiation protection and safety of radiation sources" promulgated by occupation of China as well as the new trend of the radiation hazard control policies and regulations. The implementation of the "occupation disease prevention law" and the need to constantly improve the radiation protection standard system to support both technology and management,highlighted the importance of improving the existing radiation protection standard system.Methods From the importance of improving the radiation protection standard system of radiation protection system and the development of standard applicability,supervision of the actual development of occupation standard radiation hazard needs, recommendations of improving the existing standard system was made.Results The promulgation of the basic standards of international radiation protection will promote the establishment and continuous development of occupational radiation hazard control and occupational health supervision system in china. As one of the key preconditions for the healthy development of nuclear science and technology development and application in China,it is necessary to improve the standard system to build the basic structure of radiation protection in china.Conclusion From the requirements of the scientific management and technical point of view,the development of radiation protection standard system and enrichment in its content are the important measure and guarantee of is to enhance the supervision ability and level of occupation hazards radioactive radiation hazards, strengthen occupation supervision and management system and realizing the important measure occupational health of workers of improving the workplace protection level and occupation of irradiated individuals protect and improve the occupation health care system, improving their self-protection awareness.
  • Investigotion of a Case of Abnormal Personal Testing Results of Extevnal Radiation of Occupational Disease in Radiation Workers
    SUN Li-wei, QIAN Xu-dong, WANG Yue
    2017, 26(5): 575-576.
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    Objective By occupational radiation workers with external exposure personal monitoring results to investigate the cause of abnormal analysis, provide scientific basis for strengthening the personal dose monitoring.Methods Sampling survey methods, including field exploration, refer to previous reports, on-site rapid detection and verification.Results The south adjacent to the workplace 16 row CT room, its equipment place state test and field test results are qualified; Radiology department in 2016 1-4 quarter of personal dose was not contaminated during the process of collecting the hair, only the fourth quarter of 2016 individual dose presented abnormal test results; The readme was equipped with dose meter when accepting radioactive inspection.Conclusion Outside the occupational exposure dose monitoring results for personal mistake as caused by abnormal reasons, It is suggested to further perfecting the relevant rules and regulations and unit performance appraisal, strengthen internal management and education training as to ensure the quality control measures in place to avoid such events.
  • Study on Strategy of Public Health Education for Nuclear or Radiological Emergencies
    FU Xi-ming, YUAN Long, LIU Ying
    2017, 26(5): 577-579.
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    Objective To explore the strategy of public health education for nuclear or radiological emergencies.Methods According to work experiences and relevant literatures, the characters and key links of public health education for nuclear or radiological emergencies are analyzed.Results The strategies and methods for public health education for nuclear or radiological emergencies are provided, including the needs of assessment, strengthening protection awareness in normal times, making efforts for information releasing during emergencies and effectiveness evaluation. The relevant cases are analyzed.Conclusion It is suggested that the public health education for nuclear or radiological emergencies in China be enhanced, in order to respond to nuclear or radiological emergencies effectively and protect the public.
  • The Study on the Cognition ofPparental Radiation Risk and its Influencing Factors in Hospital Children
    HU Xiao-su, LEI Cui-ping, WANG Ying, GUO Jia, SUN Quan-fu
    2017, 26(5): 580-584.
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    Objective To explore the influencing factors of radiation risk perception among parents of hospitalized children.Methods By using the method of convenience sampling, the parents of 203 children of three level hospitals in Beijing were investigated by self-designed questionnaire.Results The objective assessment of parents' radiation basic knowledge was in the middle and lower levels (less than 50%).The lowest score of ionizing radiation was answered, accounting for 17.5%.Cultural degree and occupation are the influencing factors of its radiation basic knowledge (P<0.05).Low recognition of protective equipment for radiological examination (45.5% and 19.5% were not worn and not known);Wear protective equipment at 35.0%.The best way for health education is professional training (52.0%); on-site lecture (27.5%) and promotional chart (9.5%).Conclusion Clinc parents's basic knowledge of radiation is low, To improve the hospital health education management strategy, strengthen the parents's medical radiation protection knowledge and its mission, strengthen professional training and the site of the lecture management,enhance the initiative of parents to participate in the protection,so as to better improve the radiation protection consciousness and cognitive level of related people.
  • Radiation shielding of industrial X-ray radiography room
    Luo Lei
    2017, 26(5): 588-590.
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    Objective To analyzed the shielding effect of X-ray on protective door.Methods We calculated the dose contribution of primary and secondary scattering to the outside of the door by using the recommended formula in (GBZ/T 250-2014).Results The influence of primary scattering on the external radiation dose of the door is great, the secondary scattering has certain influence on the dose outside the door, but within the limit.Conclusion The more scattering the scattering line, the smaller the effect on the external radiation dose. Under certain conditions, the main radiation ray by the second scattering, the dose outside the door meets the standard limit of requirements.
  • Analysis on the Audile Monitoring Results of Noise Exposed Workers in a City of Shandong Province in 2016
    LIU Yi-chang, Chi Xin, SHEGN Qing-min, WANG Ke-lin, JI Ping-zhong, ZHANG Fang, Chen Chao
    2017, 26(5): 593-595.
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    Objective By analyzing the audile monitoring results of noise-exposed workers in a city of Shandong Province of 2016,to explore characteristic of workers with hearing loss.Methods We analyze the on Examination result of 6607 noise-exposed workers in 2016,and describe the distribution of the workers with high frequency hearing threshold greater than or equal to 40 dB(A) by age, working ages, Enterprise scale, industry, Economic type and gender.Results Among 6607 noise-exposed workers, there is a significant statistical difference in those workers with high frequency hearing threshold greater than or equal to 40 dB(A) according to different ages, working ages, gender and ownership system plants(P<0.05). Male workers who work in private or foreign business plants for more than 3-years got a higher detection rate.Conclusion Male workers who work in private or foreign plants for 3 or more years got a higher detection rate, we should pay more attention to occupational health surveillance and Noise intensity improvement in the workplace in future.
  • CT Findings and Diagnosis of Abdominal Trauma
    LIU Yu, LIU Jian-bin
    2017, 26(5): 600-602,605.
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    Objective To comprehensively analyze the clinical application of CT in the diagnosis of thoracic and abdominal trauma patients.Methods From September 2015 to October 2016, the clinical data of 75 patients with thoracic and abdominal trauma admitted in our hospital were selected as the study subjects, and divided into experimental group and control group according to different diagnostic methods. The control group was diagnosed by computer X-ray imaging (37 patients). The experimental group was treated with spiral CT (38 patients). SPSS 20.0 statistical software was used to analyze the chest trauma (subcutaneous emphysema, rib fractures, scapular fractures, clavicular fractures, pulmonary contusion, pleural effusion, pneumothorax, atelectasis, mediastinal emphysema, longitudinal Pharyngeal hematoma, liver injury, spleen injury, kidney injury, pancreatic injury, pleural hemorrhage, peritoneal hemorrhage, mesenteric laceration, diaphragm injury) diagnostic coincidence rate, computer X-ray imaging performance and spiral CT performance parameters.Results There was no significant difference between the two groups in the diagnosis of scapular fractures, pulmonary contusion, pleural effusion, liver injury, spleen injury, pancreatic injury, peritoneal hemorrhage and diaphragm injury (P>0.05) The diagnostic accuracy of subcutaneous emphysema, rib fractures, clavicular fractures, pneumothorax, atelectasis, mediastinal emphysema, mediastinal hematoma, renal injury, pleural hemorrhage and mesenteric laceration was much higher than that of the control group (P<0.05);击computer X-ray imaging results show:no lung texture of the low-density shadow, the inner edge can be seen by the oppression of the collapse of the lungs shade boundaries; spiral CT examination results show:renal parenchyma round high density and border More vague.Conclusion The clinical application of spiral CT in the diagnosis of thoracic and abdominal trauma is significantly higher than that of CR.
  • The Effiectiveness of Holmium Laser and Rigid Ureteroscope Combined With Flexible Ureteroscope Treatment for Upper Ureteral Calculi
    LI Chao-ming, GONG Jin-wei, LI Hai-xia, LI Peng-hui
    2017, 26(5): 603-605.
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    Objective To evaluate the effiectiveness and safety of Holmium Laser and rigid Ureteroscope Combined With Flexible Ureteroscope treatment for Upper Ureteral Calculi.Methods Various clinical parameters were analyzed retrospectively in 21patients with upper ureteralcalculi from August 2015 to November 2016,15 were male and 6 were female.the average of all patients was 45.2. 10 were on the left and 11 were on the right. Among them, 2 cases had kidney stones,respectively. and 1 patient had bilateral ureteral calculi. There were different degrees of the hydronephrosis in all the 21 cases. 18 cases were treatment fuilure of ESWL,and 13 cases had polypus.Results 76.2%(16/21)patients obtained satisfactory lithotripsy effect.1 patient indwelling double J tube in operation underwent two-stage operation due to hemorrhage. Ureteral perforation occurs in 1 case.4 patients underwent one-stage operation,and for 2 cases, ESWL was done due to the failure of puting ureteroscope.Conclusion Holmium Laser and rigid Ureteroscope Combined With Flexible Ureteroscope is a safe and effective treatment for the upper ureteralcalculi.
  • Analysis of Misdiagnosed Cases of Medical Images
    ZHANG Li-xin
    2017, 26(5): 606-609.
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    Objective To analyze the reasons of imaging misdiagnosis cases and explore the method to solve the problem.Methods Comparing results of 16 caese were compared of misdiagnosis cases on first diagnosis and follow-up/check way、way to solve the problem、tracing analysis the reason of the diagnostic errors and key link.Results Imaging diagnosis, misdiagnosis involving imaging technology, diagnosis, clinical diagnosis, pathology and other single and complex links each link is affected by subjective and objective factors.Conclusion We should insist on the principle of imaging diagnosis standard diagnostic process reduce the imaging diagnosis of misdiagnosis、adopting reasonable imaging technology and the way of diagnosis、eliminating main objective factors interference.
  • Application of Full Weight-bearing Position of Lower Limb in Image Evaluation of Artifical Hip Replacement
    YUN Qing, ZHANG Zhu-qiang, CHAO Shuang
    2017, 26(5): 610-611,615.
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    Objective To investigate the application of double lower limbs full weight-bearing direct digital radiography stitching technique in hip arthroplasty imaging assessment.Methods Using double lower limbs length DR splicing technology, the lower extremity length of weight-bearing was performed in 89 patients. The imaging results were analyzed.Results The lower extremity length of image mosaic was excellent in 86 cases, fuir in 3 cases. After hip arthroplasty limb length, 48 cases without complications; preoperative aseptic necrosis of femoral head, lower limbs caused by unequal deformity in 23 cases of hip; postoperative lower extremity discrepancy in 2 cases; aseptic loosening of the prosthesis dislocation in 4 cases; 5 cases of prosthesis osteolysis; periprosthetic fracture in 2 cases; joint morphology and function changes in 5 cases.Conclusion Evaluation of before and after artificial hip replacement double lower limbs full weight-bearing DR photo stitching technology has important clinical value. The preoperative and postoperative outcomes of the hip joint and the lower extremities, as well as the occurrence of complications were truly reflected.
  • Value of Tiny Breast Calcification in the Diagnosis of Breast Mammography
    XIA Yi-fang, ZHANG Lin, LIU wei
    2017, 26(5): 612-615.
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    Objective To analyze the the imaging features of tiny breast calcification in the Molybdenum target X-ray film, to evaluate its clinical significance in the Breast cancer diagnosis. A contrastive analysis was conducted on the patients in two groups with shape, distribution, size, density and calcification quantity,compared with the pathological results. Results Tiny calcification could appear on patients with breast benign lesion or malignant lesion. The amount of malignant lesion patients was 38, while the benign lesion patients was 29. The imaging features of malignant lesion calcification mainly manifested as different form, inequality of size,unevendensity,clusterdistribution, regional distribution or distribution along the conduit while benign lesion calcification mainly manifested as coarser particles, sharpness of border, and widely scattered. Conclusion The imaging features of tiny breast calcification can be the reliable basis in identifying benign and malignant breast lesion, and is of great significance for the diagnosis of breast cancer.
  • The Application of Breast Bracket to Research on the Effects of Lung Irradiated Volume
    LIU Zhu-long, HE Fang-fang, CHENG Yu-feng
    2017, 26(5): 616-618.
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    Objective To provide reference for clinical application on patients with breast cancer who had got radical surgery still require radiotherapy, and to investigate the impaction the lung irridiated volume resulted from the use of breast bracket in the process of radiotherapy.Methods First,we carried out the shoot wild range in according to the indications of the patients with the breast cancer need postoperative adjuvant radiotherapy,then,scaned the same patients at different breast bracket Angle (0°, 15°)through the way of large aperture simulation CT positioning machine location at the same repeated radiotherapy positions as the X-ray,acquisited the CT image data and calculated the lung volume variation under different angles of clavicle ueno irradiated by 6 mv-X-ray.Results We can know they must exist obvious difference as the observed position 15° apex illuminated volume is significantly greater than the position 0° apex illuminated volume.Conclusion The use of breast bracket can effectively reduce the lung tissue of the illuminated dose,and the appropriate breast bracket Angle which can effectively reduce the apex volume by X-ray irradiated.