Evaluation of imaging properties of a laser film digitizer.
Evaluation of imaging properties of a laser film digitizer.
复制标题
激光胶片数字化仪成像特性的评估。
DOI：
10.1088/0031-9155/37/1/020
复制
发表时间：
1992
影响因子：
3.5
通讯作者：
Nishikawa,RM
中科院分区：
文献类型：
--
作者：
Yin,FF;Giger,ML;Doi,K;Yoshimura,H;Xu,XW;Nishikawa,RM
本文对激光胶片数字化仪的基本成像特性进行了定量评价。根据输入光密度与输出像素值的关系，确定了数字化仪的特性曲线。激光数字化仪的空间分辨率，其特征在于使用预调制传递函数（MTF），这是使用曲线拟合技术与成角狭缝测量。对于噪声分析，比较数字化前后均匀曝光的胶片样品的维纳谱。研究了不同采样距离和扫描方向对测量结果的影响。结果表明，激光数字化仪的特性曲线呈线性。在不同的采样距离下，数字化仪的预调制传递函数是相似的，并且在垂直扫描方向上比在水平方向上大得多。
The authors provide a quantitative assessment of the basic imaging properties of a laser film digitizer. The characteristic curve of the digitizer was determined in terms of the relationship between input optical density and output pixel value. Spatial resolution of the laser digitizer was characterized using the presampling modulation transfer function (MTF), which was measured using a curve fitting technique with an angulated slit. For the noise analysis, the Wiener spectra of uniformly exposed film samples were compared before and after digitization. The effects of different sampling distances and scanning directions were investigated. The results show that the characteristic curve of the laser digitizer was linear. The presampling MTFs of the digitizer were similar at different sampling distances and were substantially greater in the vertical scanning direction than in the horizontal direction.
登录
查看更多内容
数字放射线摄影中基本成像特性的研究。
影响因子：
3.8
作者：
Giger,ML;Doi,K;Metz,CE
通讯作者：
Metz,CE
影响因子：
3.8
作者：
F. Yin;M. Giger;K. Doi
通讯作者：
F. Yin;M. Giger;K. Doi
数字放射线摄影中基本成像特性的研究。
影响因子：
3.8
作者：
Giger,ML;Doi,K
通讯作者：
Doi,K
计算机射线照相系统的分辨率特性
DOI：
10.1117/12.953211
发表时间：
1989
期刊：
Japanese Journal of Radiological Technology
影响因子：
--
作者：
H. Fujita;J. Morishita;K. Ueda;D. Tsai;A. Ohtsuka;T. Fujikawa
通讯作者：
T. Fujikawa
数字放射线摄影中基本成像特性的研究。
影响因子：
3.8
作者：
Giger,ML;Doi,K;Fujita,H
通讯作者：
Fujita,H