我从来没有处理过Dicom图像之前，但以下代码应该做的工作：

import pydicom
import numpy as np

ds = pydicom.dcmread("path/to/dicom_image.dcm")

# Get the pixel data as a numpy array
image = ds.pixel_array.astype(np.float32)

# Change the brightness by adding a constant value
brightness_value = 50
image += brightness_value

# Clamp the pixel values to the valid range (0 - 255 for 8-bit images)
image = np.clip(image, 0, 255).astype(np.uint8)

# Update the pixel data in the DICOM dataset
ds.PixelData = image.tobytes()

pydicom.dcmwrite("path/to/modified_image.dcm", ds)

注意：我在网上做了一些挖掘，得到了下面的代码