DICOM pixel data lossless rendering and representation

Question

I quote :

DICOM supports up to 65,536 (16 bits) shades of gray for monochrome image display, thus capturing the slightest nuances in medical imaging. In comparison, converting DICOM images into JPEGs or bitmaps (limited to 256 shades of gray) often renders the images unacceptable for diagnostic reading. - Digital Imaging and Communications in Medicine (DICOM): A Practical Introduction and Survival Guide by Oleg S. Pianykh

As I am a beginner in image processing I'm used to process images colored and monochrome with 256 levels, so for Dicom images, in which representation I have to process pixels without rendering them to 256 levels?, because of the loss of information.

note: If you can put a better tittle for this question, please feel free to do so, I've a hard time doing that and didn't come to a good one.

Answer 1

首先，您必须对图像的像素进行Modality VOI / LUT转换，以便将依赖于Modality的值转换为已知单位（例如，Hounsfield或Optical Density）。

然后，所有处理必须在整个值范围内完成（请勿将16位值转换为8位）。

可以使用缩放值（使用8位值）执行演示（可视化），通常将数据通过Presentation VOI / LUT（窗口宽度或LUT）传递。

有关模态转换，请参见：rescale slope and rescale intercept

有关窗口/宽度的信息，请参见以下内容：Window width and center calculation of DICOM image