Medical X-ray angiography equipment dose influencing factors and image quality analysis
Objective To investigate the effects of different X-ray fields,additional copper filtration,distance between the patient and the image receptor(object-image distance,OID)and frame rate on the incident dose and image quality of medical X-ray angiography equipment,and analyze the statistical differences between dose and image quality,so as to provide guiding suggestions for the reasonable selection of factors in clinical practice.Methods The phantom was used to simulate the irradiated patients,and different X-ray fields(20cm,32cm,49cm),added copper filtration(0.1 mm,0.3 mm,0.6 mm),OID(30cm,45cm,60cm)and frame rate(7.5p/s,15p/s,30p/s)were selected,and the measured patient incident dose rate and the image quality of the acquired images were compared.Results There was a statistically significant difference in the dose rate at the irradiation surface of the different X-ray field level phantoms(P<0.05).There was a statistically significant difference in the dose rate at the irradiation surface of the different additional copper filtration level phantoms(P<0.05).There was no statistically significant difference in the image quality score among the three different additional copper filtration levels(P>0.05).There was a statistically significant difference in the dose rate at the irradiation surface of the different OID level phantoms(P<0.05).There was no statistically significant difference in the image quality score among the three different OID levels(P>0.05).There was a statistically significant difference in the dose rate at the irradiation surface of the different frame rate level phantoms(P<0.05).There was no statistically significant difference in the image quality score among the three different frame rate levels(P>0.05).Conclusions The incidence dose showed that 20cm X-ray field was greater than X-ray fields of 32cm and 49cm,0.1mm added copper filter was greater than added copper filters of 0.3mm and 0.6mm,60cm OID was greater than OID of 30cm and 45cm,30p/s frame rate was greater than frame rate of 15p/s and 7.5p/s.The image quality showed that the 20cm X-ray field was better than 49cm X-ray field,and there was no significant difference in the image quality at the level of other factors.
X ray equipmentAdded copper filtrationFrame rateDose rateImage quality
万方数据
维普
