Space medicine contributed4 to radiation therapy for the treatment of cancer; foldable walkers (constructed from lightweight metal developed by NASA); personal alert systems (devices worn by individuals who might require immediate emergency medicine or safety assistance); CAT and MRI scans (devices used by hospitals to look inside the human body, first developed by NASA to take better pictures of the moon); muscle-stimulant devices (to prevent muscle atrophy in paralyzed patients); advanced types of kidney dialysis machines . . . the implantable heart defibrillator, a tool to constantly
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