Video narration
MRI itna zor se kyon khatkhataata hai? Loudspeaker mein bijli ek hisse ko hilaakar awaaz banaati hai; MRI mein tareeka alag hai. Shor bade chumbak ke joojhne ya machine tootne ka sanket nahin hai. Scan mein gradient coils, yaani chumbakiya kshetra badalne waali kundaliyaan, mein bijli tezi se chaalu-band hoti hai. Mazboot chumbakiya kshetra un dhaaraon par bal daalta hai, jisse coils hilti hain. Unka kampan thak-thak ya bhinbhinahat banata hai; awaaz scan ke saath badal sakti hai. Yahi scan ke kaam karne ki awaaz hai.