1. A method for generating a pseudo-computed tomography (CT) image volume, comprising: acquiring a first magnetic resonance (MR) image volume (UTE 1 ) using an ultra-short echo time; acquiring a second MR image volume (UTE 2 ) using a conventional echo time that is longer than the ultra-short echo time; normalizing the acquired UTE 1 and UTE 2 image volumes; creating a mask for an anatomical structure featured in the normalized UTE 1 and UTE 2 image volumes; segmenting bone regions from the normalized UTE 1 and UTE 2 image volumes using the created mask and one or more trained classifiers; and constructing a pseudo-CT image from the normalized UTE 1 and UTE 2 image volumes, the created mask, and the segmented bone regions.