Kaugars G E, Fatouros P
Oral Surg Oral Med Oral Pathol. 1982 Mar;53(3):322-5. doi: 10.1016/0030-4220(82)90310-3.
This study compared cephalometric and P-A skull films taken with conventional (CaWO4) screens and rare earth screens. Patient exposure was reduced by 17 to 55 percent on two different x-ray machines by the use of rare earth screens. Results from 130 clinical evaluations showed that the diagnostic quality of radiographs taken with either system was roughly comparable. This presents a persuasive argument for the use of rare earth screens since the diagnostic quality of the films can be maintained while significantly reducing the patient's exposure to radiation.
本研究比较了使用传统（钨酸钙）屏和稀土屏拍摄的头颅侧位片和正位颅骨片。在两台不同的X光机上，使用稀土屏可使患者的辐射暴露减少17%至55%。130例临床评估结果表明，两种系统拍摄的X光片的诊断质量大致相当。这为使用稀土屏提供了一个有说服力的论据，因为在显著减少患者辐射暴露的同时，可以保持胶片的诊断质量。
