Volume 17, Issue 6

When performing dynamic studies using emission tomography the tracer distribution changes during acquisition of a single set of projections. This is particularly true for some positron emission tomography (PET) systems which, like single photon emission computed tomography (SPECT), acquire data over a limited angle at any time, with full projections obtained by rotation of the detectors. In this p...

在使用发射断层扫描进行动态研究时，示踪剂分布会在获取单组投影的过程中发生变化。这对于某些正电子发射断层扫描（PET）系统尤其如此，这些系统与单光子发射计算机断层扫描（SPECT）一样，在任何时刻都只能获取有限角度的数据，通过旋转探测器获得完整的投影。在本文中...

An algorithm is presented for tracking boundaries in three-dimensional binary images based on rhombic dodecahedral voxels. The algorithm produces a list of all the rhombic voxel faces in such a boundary.

提出了一种基于菱形十二面体体素的三维二值图像边界追踪算法。该算法生成此类边界中所有菱形体素面的列表。

D.H. Laidlaw replies to comments made on his paper (D.H. Laidlaw et al., ibid., vol. 17, no. 1, p. 74-86, 1998) by H. Soltanian-Zadeh and J.P. Windham (ibid., vol. 17, no. 6, p. 1094, 1998). D.H. Laidlaw says that the concept of optimality always rests on a framework of assumptions. Eigenimage filtering is optimal under a certain set of assumptions. However, D.H. Laidlaw et al.'s voxel histogram m...

D.H. Laidlaw回复H. Soltanian-Zadeh和J.P. Windham对其论文（D.H. Laidlaw等，同上，第17卷，第1期，第74-86页，1998年）的评论（同上，第17卷，第6期，第1094页，1998年）。D.H. Laidlaw表示最优性概念总是基于一组假设。特征图像滤波在特定假设下是最优的。然而，D.H. Laidlaw等人的体素直方图方法...

H. Soltanian-Zadeh and J.P. Windham read with interest a paper by D.H. Laidlaw et al. (see ibid., vol. 17, no. 1, p. 74-86, 1998). H. Soltanian-Zadeh and J.P. Windham felt that the methods D.H. Laidlaw et al. presented are interesting and illustrate the significance of partial volume information in medical image analysis. However, D.H. Laidlaw et al. seem to be unaware of the details of the litera...

H. Soltanian-Zadeh和J.P. Windham饶有兴致地阅读了D.H. Laidlaw等人发表的论文（见同上，第17卷，第1期，第74-86页，1998年）。他们认为D.H. Laidlaw等人提出的方法很有趣，并说明了部分容积信息在医学图像分析中的重要性。然而，D.H. Laidlaw等人似乎并不了解文献的细节……

This index covers all technical items - papers, correspondence, reviews, etc. - that appeared in this periodical during the year, and items from previous years that were commented upon or corrected in this year. Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author's ...

本索引涵盖了本期刊在年内发表的所有技术性文章——论文、通讯、评论等，以及往年在本年中被评论或更正的文章。部门和其他项目若被认为具有档案价值，也可能被收录。作者索引包含每个项目的首要条目，列在第一作者名下。

This index covers all technical items - papers, correspondence, reviews, etc. - that appeared in this periodical during the year, and items from previous years that were commented upon or corrected in this year. Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author's ...

本索引涵盖本期刊当年发表的所有技术文章——论文、通讯、评论等，以及前几年在本年度被评论或更正的文章。还包括被认为具有档案价值的部门和其他文章。作者索引包含每篇文章的主条目，列在第一作者名下...