I am reaching out with a question regarding the evaluation method for the missing modality synthesis challenge. Specifically, I would like to inquire about how the SSIM (Structural Similarity Index) metrics will be calculated. Considering that the intensity range of the different cases in this challenge is quite diverse, I was wondering if we are required to predict the intensity range of the missing modality, or if the SSIM will be calculated after intensity normalization. For instance, should we normalize all images to a range of 0 to 1 before calculating the SSIM? Your clarification on this matter would be greatly appreciated. Thank you for your time and attention to this query.