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Insights from 3D images allow improvements in parameter choices for optimized density of parts produced by laser powder bed fusion , and generally allow a better understanding of the porosity present in additively manufactured parts .
 3D images, parameter, density, laser powder bed fusion, porosity, additively manufactured
Please list all entity words in the text that fit the category. Output format is "word1, 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:
 3D images, parameter, density, laser powder bed fusion, porosity, additively manufactured