Lowering patient dose on single-phase X-ray units.
In this study, entrance skin doses for AP pelvis and lateral lumbar spine examinations were measured with single-phase, three-phase and medium frequency x-ray generators. Results showed that for equal tube voltage (kVp) exposure to achieve similar film density, the ESD was significantly higher with the single-phase generator than the other two generators. Further research showed that by increasing kVp, the single-phase generator could achieve the lower ESD values obtained with the three-phase and medium frequency generators while maintaining similar film density and contrast.
Fung
K
K
Department of Optometry and Radiography, Hong Kong Polytechnic in Kowloon.
D006801:Humans; D008161:Lumbosacral Region; D008961:Models, Structural; D010388:Pelvis / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D011859:Radiography / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012867:Skin / Q000000981:diagnostic imaging; D013131:Spine / Q000000981:diagnostic imaging*; D013997:Time Factors; D014962:X-Ray Film