Lead inodzivirira thyroid nhovo inonyanya kushandiswa mukuongororwa kwechiremba iyo inopa inoshanda X ray kudzivirira kune varwere. Isu tinokwanisa kupa hukuru hwakasiyana uye kutungamirira yakaenzana thyroid nhovo maererano nezvaunoda. Tinogona kupa 0.25mmPb, 0.5mmPb uye 0.75mmPb inotungamira yakaenzana nenhovo yethyroid mumavara akasiyana uye saizi.
