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评价3种不同的技术[铋屏蔽、部分CT扫描和球管电流调制(TCM)]在胸部CT检查中降低女性乳腺放射剂量的可能性。使用带有乳腺的半拟人胸部模体,在64层CT设备上对剂量和影像质量进行测量和模拟。采用蒙特卡洛(MC)方法计算三维剂量分布。通过测量和模拟确定噪声。铋
Three different techniques were evaluated [bismuth shield, partial CT scan and tube current modulation (TCM)] to reduce the possibility of female breast radiation dose in chest CT examination. Dose and image quality were measured and simulated on a 64-slice CT device using a semi-prosthetic chest phantom with a breast. Three-dimensional dose distribution was calculated using the Monte Carlo method. Noise is measured and measured. bismuth