Study On The Detection Of Population Exposure Dose By Digital Radiography And Computed Radiography

TheΧ-ray is the invisible double-edged sword. In medical service withΧ-ray, may also produces powerful one side to the human body disease's diagnosis and the treatment, may also to the body tissue organ, the gland and the blood corpuscle has a series of damages. The fact already proved that long-term excessive accepts the unusual radiation, will cause the human to have symptoms and so on asthenia, dizziness, losing sleep, anorexia, will cause organism immunity to drop, serious may cause the endocrine disorder and the hematopoietic system harm.Pointed out after the innumerable time epidemiology statisticion that the medical service with shinesΧlight to be possible to induce cancer, the leukemia or other hereditary disease, the beam illuminates more much, the carcinogenic risk is bigger. This experiment gives DR which and the CR two bigΧ-ray inspection project on clinical is at present long uses is the starting point, the system and comprehensive to accepts 2 kind of medical inspection patient's exposure dose to carry on the science the collection and the statistics. In order to reduce all the people to illuminate the dosage, improves all the people's physical quality to have the very vital significance.Objective:Applies the thermoluminescent dosage powder, the dosage which the examination and on contrastive analysis clinical commonly used DR and the CR patient receives.Chooses the better examination method.Methods:1. Thermoluminescent dose meter (TLD) manufacture: Puts in the LiF powder in the lead lunch box, 240℃the annealing 10 minutes takes out in the thermoluminescent annealing furnace, places on the stereotype to cool, takes the suitable dosage to survey the background in the FJ-377 thermoluminescent meter, the record, places in the lead box other LiF powder spare.2. Manufactures the LiF-TLD tube:Takes plastic tube several, each plastic tube average truncation becomes three sections, heats up each acorn tube's end on the spirit lamp, and uses the pliers to press immediately causes it to cool the seal evenly, use the LiF powder to add the type again to pack each acorn tube the LiF powder, preheater pipe's another end, the seal, the LiF-TLD tube manufacture completes, places in the lead box spare.3. Sample preparation:Before the DR survey, in examines 9 LiF-TLD dose meter glue clothing's back side, the marking is 1~9, the survey incidence dosage, its position as shown in Figure 2. Before the CR survey, in examines 9 LiF-TLD dose meter glue clothing's back side, the marking is a~i, the survey incidence dosage, its position as shown in Figure 2.4. Patient collection:Looks for 50 in the hospital radioactive rays branch to need stochastically to shine sternum's patient, the predose lets the patient put on examines the clothing, records each patient's name, the sex, the age, and according to different build establishment corresponding parameter, record. The predose lets the patient put on examines the clothing, after choosing the chest, before, position illumination, after the illumination, dose meter takes down each examination clothing's on 9 LiF - the TLD, puts in separately 50 envelopes, the seal, and marks each patient's name on the envelope, puts in evades the light in the bag.5. Survey:Examine the LiF-TLD tube brings back to the laboratory measurement data. Turns on the FJ-377 thermoluminescent meter, the convention run machinery carries on the survey.Results:May see by the result, the DR patient is illuminated the dosage (0.30±0.66 **) to be short in CR obviously (0.90±0.27) the patient, ** P﹤0.01 has the remarkable difference, has statistics significance. Conclusion:1. Inspects when the same level condition, accepts the DR inspector to illuminate the dosage is smaller than obviously accepts the CR inspector to illuminate the dosage.2. The DR patient is illuminated the dosage is smaller than obviously CR the patient. Accepts the DR photography the patient is illuminated the patient who the damage is smaller than obviously accepts the CR photography to illuminate the damage.3. Should promote DR the use to reduce CR gradually vigorously the use, reduces is examined the crowd to illuminate the dosage.4. Strengthens DR the research and development work to reduce DR the cost to enable more people to be able to enjoy the advantage which DR brings.5. Simultaneously strengthens DR the compatibility, similarly may also reduce the DR installment the cost.