python - 如何在使用 SimpleITK 保存 DICOM 文件时保留 UID？

Question

我正在尝试使用 SimpleITK 读取一个 DICOM 文件并将其保存在其他地方。我注意到 Series Instance UID 发生了变化，无论我是否明确设置了它。

如何保留原始 UID？

from pathlib import Path
import SimpleITK as sitk

dicom_path = '......'
p = Path(dicom_path)

reader = sitk.ImageFileReader()
reader.SetFileName(str(p))
reader.LoadPrivateTagsOn()

image = reader.Execute()
print('Series Instance UID', image.GetMetaData('0020|000e'))
print('SOP Instance UID', image.GetMetaData('0008|0018'))
image.SetMetaData('0020|000e', image.GetMetaData('0020|000e'))

writer = sitk.ImageFileWriter()
writer.SetFileName(out_folder+case+p.name)
writer.SetUseCompression(False)
writer.Execute(image)

reader = sitk.ImageFileReader()
reader.SetFileName(out_folder+case+p.name)
reader.LoadPrivateTagsOn()

image = reader.Execute()
print('Series Instance UID', image.GetMetaData('0020|000e'))
print('SOP Instance UID', image.GetMetaData('0008|0018'))

为系列 UID 提供两个不同的字符串。 SOP UID 保持不变:

Series Instance UID 1.3.12.2.1107.5.1.4.74141.30000017013107011409700014483
SOP Instance UID 1.3.12.2.1107.5.1.4.74141.30000017013107011409700014570

Series Instance UID 1.2.826.0.1.3680043.2.1125.1.65790274925978549485969544082687134
SOP Instance UID 1.3.12.2.1107.5.1.4.74141.30000017013107011409700014570

Answer 1

虽然我从未使用过工具包，但工具包的行为很奇怪。如果修改像素数据，则应更改某些属性；在这种情况下，SOP 实例 UID 最为重要。

但是，在您的情况下，像素数据没有被修改。同样，只修改了Series Instance UID； SOP 实例 UID 不变。

无论如何，工具包提供了一种在编写 DICOM 数据集时保留 UID 的方法。请引用KeepOriginalImageUIDOn成员(member)了解更多详情。

Self& itk::simple::ImageFileWriter::KeepOriginalImageUIDOn (void)
Use the original study/series/frame of reference.

These methods Set/Get/Toggle the KeepOriginalImageUID flag which get's passed to image file's itk::ImageIO object. This is relevant only for the DICOM file format, configuring the writer to use the information in the image's meta-data dictionary or to create new study/series/frame of reference values.

Definition at line 134 of file sitkImageFileWriter.h.

这将指示工具包在写入数据集时保留原始 UID。