Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655, USA.
IEEE Trans Med Imaging. 2010 Mar;29(3):790-806. doi: 10.1109/TMI.2009.2036995.
Computed radiography (CR) using storage phosphors is widely used in digital radiography and mammography. A cascaded linear systems approach wherein several parameter values were estimated using Monte Carlo methods was used to model the image formation process of a single-side read ;;flying spot'' CR system using a granular phosphor. Objective image quality metrics such as modulation transfer function and detective quantum efficiency were determined using this model and show good agreement with published empirical data. A model such as that addressed in this work could allow for improved understanding of the effect of storage phosphor physical properties and CR reader parameters on objective image quality metrics for existing and evolving CR systems.
计算机射线摄影术(CR)使用存储荧光体,被广泛应用于数字射线摄影术和乳房 X 射线照相术。采用级联线性系统方法,利用蒙特卡罗方法估算几个参数值,对使用粒状荧光体的单侧边读取;;“飞点”CR 系统的图像形成过程进行建模。使用该模型确定了客观的图像质量指标,如调制传递函数和探测量子效率,并且与已发表的经验数据吻合良好。这种工作中所涉及的模型可以提高对存储荧光体物理性质和 CR 阅读器参数对现有和不断发展的 CR 系统的客观图像质量指标的影响的理解。