Get Pixel Spacing in Datastatd ?

[anais2390]

Hi everyone,
I would like to know if there is a way to print the pixel spacing in between the diffrent Transform of the data during preprocessing using Datastatd in the Compose class ?
Thanks

[Nic-Ma]

Hi @anais2390 ,

Thanks for your interest here.
I think you can leverage the additional_info arg of this transform to extract expected data from the meta data (like keys="image_meta_dict").

Thanks.

[anais2390]

Thanks @Nic-Ma for you reactivity.
Can you give an exemple on how to use additional_info ?

For exemple I want to get size and pixel spacing of label before and after Spacing Transform. For now I write the following command, but it gives me only size. How can I get the spacing ?

 Compose([
        LoadImaged(keys=["image", "label"]),
        EnsureChannelFirstd(keys=["image", "label"]), 
        ScaleIntensityd(keys=["image"]),
        DataStatsd(prefix="before spacing", keys=["label"]),
        Spacingd(keys=["image", "label"], pixdim=spacing, mode=['bilinear', 'nearest'], padding_mode='border', align_corners=True),   
        DataStatsd(prefix="afterspacing", keys=["label"]),
)]