| 白玫,郑钧正.不同阳极靶与滤过器组合的乳腺DR成像性能比较[J].中国医学影像技术,2009,25(9):1707~1709 |
| 不同阳极靶与滤过器组合的乳腺DR成像性能比较 |
| Comparision of imaging quality of different anode/filter combination for digital mammography |
| 投稿时间：2009-01-15 修订日期：2009-03-23 |
| DOI： |
| 中文关键词: 数字乳腺X线摄影 阳极与滤过器组合 信噪比 平均腺体吸收剂量 品质因数 |
| 英文关键词:Digital mammography Anode/filter combination Signal to noise ratio Mean glandular dose Figure of merit |
| 基金项目: |
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| 摘要点击次数: 1923 |
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| 中文摘要: |
| 目的 对数字乳腺X线摄影不同阳极靶与滤过器组合的成像性能进行对比。 方法 采用不同厚度乳腺成像体模,选择不同的阳极靶与滤过器组合在自动曝光模式下成像。测量图像信噪比和腺体吸收剂量,并引入图像品质因数综合评价成像性能。 结果 对于不同厚度的乳腺体模,使用钨铑阳极滤过器组合平均腺体吸收剂量比其他组合可以降低26.32%~42.11%,图像品质因数高于其他组合5.06%~37.43%。随着腺体厚度的增加平均腺体吸收剂量逐步增加,而图像信噪比和图像品质因数则随厚度的增加而下降。 结论 当体模厚度在4.0~9.0 cm时,采用钨铑阳极滤过器组合可以在保证图像质量的同时减少腺体吸收剂量,总体成像性能要优于其他两种组合。 |
| 英文摘要: |
| Objective To compare the imaging quality of different anode/filter combination for digital mammography system. Methods Mammography accreditation phantom with phantom thickness from 4.0 cm to 9.0 cm was used to simulate human breast tissue, and three different combinations of anode/filter material were employed under the automatic exposure mode. The image signal to noise ratio (SNR) and mean glandular dose (MGD) were measured. The figure of merit (FOM) was used to evaluate the imaging performance of digital mammography. Results For 4.0－9.0 cm phantom thicknesses, the MGD of tungsten anode and rhodium filter combination (W/Rh) was lower by 26.32%－42.11% than other two combinations; the FOM of W/Rh achieved higher by 5.06%－37.43% than the others. SNR and FOM decreased with the increase of phantom thickness, and the MGD became higher with thicker phantom. Conclusion For 4.0－9.0 cm phantom thicknesses, W/Rh anode/filter has the best imaging quality with good image performance and low radiation dose. |
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