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This paper describes a set of techniques using X-ray computed tomography , combined with various mathematical algorithms , to measure the 3D size , shape , and internal porosity of individual particles .
 application: set; process characterization: X-ray computed tomography; concept or principle: mathematical algorithms; concept or principle: 3D; machanical property: porosity; concept or principle: particles
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: set, X-ray computed tomography, mathematical algorithms, 3D, porosity, particles 
Answer:
 application: set; process characterization: X-ray computed tomography; concept or principle: mathematical algorithms; concept or principle: 3D; machanical property: porosity; concept or principle: particles