将像素从 DICOM 标签转换为毫米/厘米(超声波)
我正在开发一个定制的 PACS 解决方案,我需要实现一个用于多帧超声的测量工具(每个研究都有多个运动和静止帧组件)。我已经使用“像素间距”标签对 X 射线进行了此操作,但这在超声波中不存在。如何使用 DICOM 标签中提供的数据计算两点之间的距离?
I am working on a custom PACS solution and I need to implement a measurement tool for multi-frame ultrasounds (each study has multiple motion and still-frame components). I have done this for X-rays using the "Pixel Spacing" tag, but that is not present in the ultrasound. How can I calculate the distance between two points using the data provided in the DICOM tags?
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您需要查看 DICOM 标准第 3 部分中的美国区域校准模块。这将告诉您如何捕获图像以及如何将存储的像素值转换为现实世界的像素值。请记住,美国图像由多个区域组成,每个区域代表不同的实体。
You need to take a look at the US Region Calibration Module in Part 3 of the DICOM standard. That will tell you how the images are captured and how to translate the stored pixel values into the real-world pixel values. Remember that US image consists of multiple regions with each region representing a different entity.
您将需要一些的尺度感,可能源自探头使用的频率/波长。这也可能取决于所使用的探针类型,该类型应该位于数据中的某处。
(我的父亲和兄弟是超声波技术人员;我是程序员。我必须询问他们如何读取超声波数据集并找出比例的详细信息。)
You're going to need some sense of scale, possibly derived from the frequency/wavelength the probe is using. This may also depend on the type of probe used, which should be in the data somewhere.
(My father and brother are ultrasound techs; I'm the programmer. I'd have to ask for details in to how they'd read an ultrasound data set and find out the scale.)