RSNA2004に参加して(平成16年度後期国際研究集会派遣会員報告書, 学術交流委員会だより)

抄録

We highly evaluate the effectiveness of Rh/Rh in Digital Mammography. Although the combination of the target/filter in digital mammography is computed based on the model formulated by Boone et al, the clinical validity of Rh/Rh, highly effective in reducing average glandular dose (AGD), is not clear. In Digital Mammography, contrast and density can be adjusted by the window width and levels of the display. Therefore, in clinical digital Mammography, Rh/Rh can be used more widely than Screen-Film Mammography (SFM). We measured the effective range of Rh/Rh and its peak kilo-voltage, changing the breast thickness and maintaining the quality of image. Then we compared Rh/Rh and Automatic Optimization Parameters (AOP) mode. Rh/Rh is equal or superior to AOP mode in any breast thickness. Especially, Rh/Rh was effective in thin breast. We can also reduce exposure dose in this case.