Intimate combination of low- and high-resolution image data: I. Real-space PET and (1)H(2)O MRI, PETAMRI.
Intimate combination of low- and high-resolution image data: I. Real-space PET and (1)H(2)O MRI, PETAMRI.
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低分辨率和高分辨率图像数据的紧密结合：I. 实空间 PET 和 (1)H(2)O MRI、PETAMRI。
DOI：
10.1002/(sici)1522-2594(199908)42:2
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发表时间：
1999
影响因子：
3.3
通讯作者：
SpringerJr,CS
中科院分区：
文献类型：
--
作者：
Sammi,MK;Felder,CA;Fowler,JS;Lee,JH;Levy,AV;Li,X;Logan,J;Pályka,I;Rooney,WD;Volkow,ND;Wang,GJ;SpringerJr,CS
相同组织切片的两种不同类型的（共配准）图像通常具有不同的空间分辨率。它们的数据的明智的逐像素组合可以完成，以产生一个单一的图像，展示两者的属性。在这里，人脑的轴向18 FDG PET和1H 2 O MR图像被用作这对图像的低分辨率和高分辨率成员。色标是必要的，以便提供来自两种图像类型的单独强度参数。然而，并不是所有的颜色尺度都能适应这种分离性。HSV颜色模型允许人们选择一个色标，其中低分辨率图像类型的强度被编码为ashue，而高分辨率类型的强度被编码为value，一个合理的独立参数。此外，高分辨率图像必须具有高对比度，并且几乎总是与低分辨率图像相同的定量。这里，使用弛豫成像MR图像（自然分割的定量1H 2 O自旋密度分量）。当编码为色标值时，它们基本上完全的对比度用于实现明显的编辑功能。因此，18FDG PET图像与灰质（GM）弛豫成像1H 2 O图像的组合产生了视觉上“GM编辑“的18FDG PETAMR（正电子发射断层扫描和磁共振）图像。这些表现出高灵敏度的示踪剂量特性的PET沿着与高空间分辨率的1 H2O MRI。然而，与此同时，它们保留了每个基本图像的完整定量测量。Magn Reson Med 42：345-360，1999. 出版于1999年Wiley利斯公司
Two different types of (co‐registered) images of the same slice of tissue will generally have different spatial resolutions. The judicious pixel‐by‐pixel combination of their data can be accomplished to yield a single image exhibiting properties of both. Here, axial18FDG PET and1H2O MR images of the human brain are used as the low‐ and high‐resolution members of the pair. A color scale is necessary in order to provide for separate intensity parameters from the two image types. However, not all color scales can accommodate this separability. The HSV color model allows one to choose a color scale in which the intensity of the low‐resolution image type is coded ashue, while that of the high‐resolution type is coded asvalue, a reasonably independent parameter. Furthermore, the high‐resolution image must have high contrast and be quantitative in the same sense as the low‐resolution image almost always is. Here, relaxographic MR images (naturally segmented quantitative1H2O spin‐density components) are used. Their essentially complete contrast serves to effect an apparent editing function when encoded as the value of the color scale. Thus, the combination of18FDG PET images with gray‐matter (GM) relaxographic1H2O images produces visually “GM‐edited”18FDG PETAMR (positron emission tomography and magnetic resonance) images. These exhibit the high sensitivity to tracer amounts characteristic of PET along with the high spatial resolution of1H2O MRI. At the same time, however, they retain the complete quantitative measures of each of their basis images. Magn Reson Med 42:345–360, 1999. Published 1999 Wiley‐Liss, Inc.