1. A method that comprises: capturing pre-treatment computed tomography (CT) images of a rock sample or a sub-sample extracted from the rock sample; capturing post-treatment CT images of the rock sample or the sub-sample; comparing pre-treatment CT images and post-treatment CT images of the rock sample or the sub-sample based on one or more alignment markers in the rock sample or sub-sample; and generating a report that describes a treatment's effect on the rock sample or the sub-sample based on said comparison.