4323
Un-normalized surface temperatures ( in the form of black-body radiances ) are obtained using high-speed infrared imaging and porosity formation is observed in the sample crosB-section through synchrotron x-ray imaging .
 surface, infrared, imaging, porosity, sample, synchrotron, imaging
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:
 surface, infrared, imaging, porosity, sample, synchrotron, imaging