The Study For The Exposure Dose Of Surgeon In Interventional Diagnosis And Treatment

Objective:Interventional diagnosis and treatment currently widely used.The surgeon mainly received scattered radiation,and the exposure dose is relatively large when operating in the same room with the patient and X-ray machine.Therefore,the exposure dose and scattered energy of the surgeon in interventional diagnosis and treatment are measured.It provides some reference opinions for the surgeons in the actual interventional diagnosis and treatment process to reduce their own exposure dose,and provides data support for the researchers on the scattered energy.Method:Using X(γ)multi-channel test analysis system,TLD,phantom and other instruments,measure four different intervention procedures: head intervention,chest intervention,liver intervention and uterine intervention.Use Excel 2019 and origin2020 to analyze and graph the experimental data.Results:1.When measuring the scattered energy,the voltage range during spotting is74 k V～90k V,the peak energy range of scattered rays is 22.99 keV ～58.90 keV,the voltage range during fluoroscopy is 63 k V～69k V,and the peak energy range of scattered rays is 33.06 keV ～53.01 keV;2.The scattering energy during PA fluoroscopy is more stable than under spot film conditions.With the increase of the measurement height,the peak energy of the fluoroscopy scattered ray does not change much,and the ray scattering energy measured during the fluoroscopy is lower than that of the spot film;3.The ray scattering energy during LAT fluoroscopy is more stable than that of spot film.Under fluoroscopy conditions,the ray scattering energy decreases as the height increases;4.Among the four interventional procedures,the exposure dose under 83 keV energy is 1.35～1.89 times the dose value under 48 keV energy;5.Among the four interventional procedures,the exposure dose of the surgeon during head intervention is the smallest,and the exposure dose during liver intervention and uterine intervention in the abdomen is larger,especially during uterine intervention,the exposure dose of the surgeon is the largest;6.The phantom method can be seen from the estimation results under the two energy calibrations,the protection effect in the 83 keV energy calibration is5.30%～91.05%,and the protection effect in the 48 keV energy calibration is4.92%～81.42%;7.Among the four interventional procedures,the second surgeon’s lens dose is1.00～2.11 times that of surgeon one;the surgeons received the highest dose during uterine intervention,while the wrist and fingers received the lowest dose during head intervention.The dose to the hands of the first operator in the same interventional procedure was compared the second surgeon’s hand dose is 6.81 times;8.When the first surgeon has no protective clothing,the stomach is the most exposed to abdominal intervention;the bladder is the organ that receives the largest exposure during head and chest interventions;in the case of the second surgeon without protective clothing,the organ with the largest exposure dose is the stomach;and whether it is the first or second surgeon,the organ with the smallest exposure under all interventional conditions is the brain.Conclusions:1.Both FWHM and energy resolution can explain the machine’s ability.The energy of the main beam is reduced,and the energy of the scatter rays of the surgeon is also reduced;2.According to the comparison of the exposure dose estimation under the 83 keV and 48 keV,it shows that there is an error in the personal dose monitoring scale using X-ray energy of the original ray.It is recommended to use the peak energy of the scattered rays to monitor the personal exposure dose of intervention workers,can make the measurement more accurate;3.Among the four estimation results of the exposure dose,the value estimated by the Niklason method is the closest to the value measured by the phantom method,and0.5mm Pb protection effect is as high as 91.05%.