Comparison of analog and digital Fourier transforms in medical image analysis.

Comparison of analog and digital Fourier transforms in medical image analysis.
复制标题

医学图像分析中模拟和数字傅里叶变换的比较。

DOI:
10.1117/1.1462035
复制
发表时间:
2002
影响因子:
3.5
通讯作者:
Liu,Hong
Liu,Hong
中科院分区:
医学3区
文献类型:
--
作者:
Li,Yuhua;Chen,WeiR;Zhang,Yimo;Qian,Wei;Liu,Hong

文献摘要

参考文献

被引文献

相似文献

研究了用模拟和数字方法处理医学图像的有效性和局限性。分析了图像处理过程中引入的几种误差类型。对于模拟光学傅里叶变换,渐晕效应和透镜像差引入了误差。对于数字傅里叶变换,混叠效应和带宽限制会引入误差。为了比较这两种技术获得的结果,对一组X射线图像进行了光学和数字处理。前者是通过包含大型傅里叶长焦镜头的光学系统实现的,而后者是通过使用傅里叶变换算法的个人计算机实现的。分析了光学傅里叶光谱和数字傅立叶光谱的准确性。我们的结果表明,由于并行处理,光学方法具有很高的速度。通过使用优化的光学系统,可以在高频区域获得高精度。相比之下,数字方法具有较高的处理精度和可编程性,但处理速度较慢。本文介绍的两种不同技术的比较,可以为不同临床环境下的处理方法的选择提供依据。即使有了今天的快速计算机,光学方法仍然适用于许多临床应用。最好的选择是模拟和数字相结合。2002年光-光仪器工程师学会。
The effectiveness and limitations of medical image processing using analog and digital methods are studied. Several types of errors introduced during the image processing are analyzed. For the analog optical Fourier transform, errors are introduced by the vignetting effect and lens aberration. For the digital Fourier transform, errors are introduced by the aliasing effect and the band limit. To compare the results obtained by the two techniques, a set of x-ray images was processed both optically and digitally. The former was achieved by an optical system containing a large Fourier telephoto lens and the latter by a personal computer using a Fourier transform algorithm. The veracity of both the optical and digital Fourier spectra is analyzed. Our results indicate that the optical method has high speed due to parallel processing. High veracity can be achieved in high frequency regions by using an optimal optical system. In comparison, the digital method has the advantages of high processing precision and programmability, but has low processing speed. The comparison of the two different techniques presented in this article can provide a basis for selection of the processing method in different clinical settings. Even with today’s fast computers, the optical method is still suitable for many clinical applications. The best choice lies in an analog–digital combination. ©2002 Society of Photo-Optical Instrumentation Engineers.
数字乳房X光照片中簇状微钙化的计算机化检测:人工神经网络的应用。
DOI: 10.1118/1.596845
发表时间: 1992
期刊: Medical physics
影响因子: 3.8
作者:
Wu,Y;Doi,K;Giger,ML;Nishikawa,RM
通讯作者: Nishikawa,RM
研究基于 FFT 的相关技术,用于验证放射治疗设置。
DOI: 10.1118/1.596743
发表时间: 1991
期刊: Medical physics
影响因子: 3.8
作者:
S. Jones;A. Boyer
通讯作者: A. Boyer
大视场数字乳腺X线摄影的CCD拼接技术
DOI: --
发表时间: 1996
期刊: IEEE Trans. Medical Imaging
影响因子: --
作者:
A. Jalink;J. McAdoo;G. Halama;Hong Liu
通讯作者: Hong Liu
DOI: 10.1119/1.16754
发表时间: 1991-08-01
影响因子: 0.9
作者:
JUVELLS, I;VALLMITJANA, S;CAMPOS, J
通讯作者: CAMPOS, J
关于射线照相图像分析
DOI: 10.1007/3540075798_21
发表时间: 1976
期刊: J. Electronic Imaging
影响因子: --
作者:
C. Harlow;S. Dwyer;G. Lodwick
通讯作者: G. Lodwick