DICOM切片订购 [英] DICOM Slice Ordering

问题描述

我对DICOM协议有一个基本问题。

I have a basic question for the DICOM protocol.

我知道如何计算DICOM图像每个切片的方向标签（A，P，L ，R，H，F）。但是例如当我得到一个编号为0001到0024的轴向切片时，我需要知道切片顺序是从头到脚还是从头到脚。

I know how I can calculate the orientation labels of every slice of a DICOM image (A,P,L,R,H,F). But when I got for example an Axial slices with numbers from 0001 to 0024 I need to know if the slice order is from Head to Feet or from Feet to Head.

如何我可以计算出来吗？

How can I calculate that ?

推荐答案

患者位置（0018，5100）会告诉您是否对患者进行了头部先仰卧，脚先俯卧，头先俯卧等扫描。< a href = http://dicom.innolitics.com/ciods/ct-image/general-image/00200013 rel = noreferrer>实例编号（0020，0013），通常也称为切片编号，不包含有关空间位置的信息，甚至不保证其唯一性。 切片位置（0020，1041）是有用的（如果存在） ，但您不能指望它始终存在，因为它是Type 3（可选）属性。要获得可靠的解决方案，您需要使用图像位置患者（0020，0032 ）与图像定位患者（0020，0037）和患者位置（0018，5100），以正确排列空间中的切片。图像位置患者会为您提供从原点到图像的第一个透射像素的中心的向量。图像方向患者为您提供空间中图像行和列方向的向量。患者位置告诉您如何将患者相对于坐标系放置在桌子上。

Patient Position (0018, 5100) will tell you if the patient was scanned head-first supine, feet-first prone, head-first prone, etc. Instance Number (0020, 0013), also commonly known as slice number, contains no information about spatial location and isn't even guaranteed to be unique. Slice Location (0020, 1041) is useful, if it exists, but you can't count on it always existing because it's a Type 3 (optional) attribute. To have a robust solution, you need to use Image Position Patient (0020, 0032) together with Image Orientation Patient (0020, 0037) and Patient Position (0018, 5100) to properly order the slices in space. Image Position Patient gives you a vector from the origin to the center of the first transmitted pixel of the image. Image Orientation Patient gives you vectors for the orientation of the rows and columns of the image in space. Patient Position tells you how the patient was placed on the table relative to the coordinate system.

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