Xrayfund

7//21/99

 

·        Longitudinal magnetization (spin-latice)—loss of energy, give energy back to local environment

·        Transverse magnetization (spin-spin)

 

Contraindications

·        Cochlear implants

·        Pacemakers

·        Shrapnel

·        Some sheet metal workers

·        Some vascular clips

·        Tattooed eyeliner

·        Pregnancy

·        IVC umbrella filter, Gianturco coil (embolus coil)

·        Artificial heart valves

·        Hearing aid

·        Claustrophobia

·        Implanted insulin/drug pump

·        Neurostimulator (tens unit)

·        Biostimulator (bone growth)

·        Penile prosthesis

·        Diaphragm/IUD

·        Paraventricular shunt

·        Wire mesh

·        Artificial limb or joint

·        Implanted defibrillator

·        Dental braces, other removable dental item

 

Hardware

·        Dewer—super coolant liquid containers

·        Fast scan—

·        Respiratory compensation—breathe slow and only during one of the phases

·        ECG gate—only during one of the phases (diastole or systole)

·        WW2—water is white on 2

·        Flowing blood shows up as a void

·