1997
This technique works by acquisition of X-ray absorption images from many angles around the object , followed by reconstruction to produce a 3D representation of the object , including its interior .
 process characterization: X-ray absorption; concept or principle: images; concept or principle: reconstruction; concept or principle: 3D
Please list all entity words in the text that fit the category.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} 
Answer:
 process characterization: X-ray absorption; concept or principle: images; concept or principle: reconstruction; concept or principle: 3D