ScaleIntensityRanged - (a_min, a_max)

[HripsimeS]

Dear MONAI team,

I have a quick question about ScaleIntensityRanged. In your notebook you mentioned (a_min=-57, a_max=164) in train_transforms.
https://github.com/Project-MONAI/tutorials/blob/master/3d_segmentation/spleen_segmentation_3d.ipynb

This choice was a random or you used especial method to find the optimal min/max intensity for the original image? Thanks in advance!

[Nic-Ma]

Hi @HripsimeS ,

a_min=-57, a_max=164 is a typical value that only works for the spleen images.

Thanks.

[HripsimeS]

@Nic-Ma Hounsfield units help to calculate a correct intensity range, below is a description of calculation for each organ. This is a useful for other MONAI users if they want to understand how to chose a correct scale intensity range.
https://radiopaedia.org/articles/windowing-ct

[wyli]

it's been answered already. Project-MONAI/MONAI#2583