question: What technique can be used to produce images of internal abnormalities ?
answer: X-rays , CAT scans , PET scans or NMR
turker_answer: X-rays , CAT scans , PET scans or NMR can be used to produce images of internal abnormalities .
rule-based: X-rays , CAT scans , PET scans or NMR can be used to produce images of internal abnormalities .