Wang J Z, Reinstein L E, Hanley J, Meek A G
Department of Radiation Oncology, University Hospital, SUNY at Stony Brook 11794, USA.
Phys Med Biol. 1996 Jun;41(6):1045-58. doi: 10.1088/0031-9155/41/6/008.
A new image registration algorithm based on phase-only correlation is applied to portal images in radiation therapy to detect translational shift. The phase-only correlation shows a sharp peak in the correlation distribution as compared to the broad peak computed from conventional correlation using fast Fourier transform. In this paper, the algorithm of phase-only correlation is described and its applicability and robustness are tested when applied to portal images used in clinical radiation oncology. The results achieved give evidence that the phase-only correlation will deliver an alternative approach for image registration and image comparison, that may be applicable in routine clinical practice.
一种基于纯相位相关的新图像配准算法被应用于放射治疗中的门静脉图像，以检测平移偏移。与使用快速傅里叶变换从传统相关性计算得到的宽峰相比，纯相位相关在相关性分布中显示出一个尖锐的峰值。本文描述了纯相位相关算法，并测试了其应用于临床放射肿瘤学中门静脉图像时的适用性和稳健性。所取得的结果证明，纯相位相关将为图像配准和图像比较提供一种可应用于常规临床实践的替代方法。
