Medical injectors and injector systems for diagnostic and therapeutic procedures, namely, medical injectors, syringes, disposable syringes and medical injector systems composed primarily of disposable syringes, tubing sets for administering drugs and powered syringe drivers all for diagnostic imaging such as magnetic resonance imaging, contrast radiography and angiography, computed tomography, ultrasound procedures; contrast delivery systems composed primarily of disposable syringes, tubing sets for administering drugs and powered syringe drivers for delivering contrast media to patients for radiographic, angiographic, computed tomography, ultrasound and magnetic resonance imaging procedures; magnetic resonance imaging (MRI) instruments, namely, anatomical conformable surface coils and probes and automatic tuning devices and anatomical positioning devices for tuning and positioning the coils and probes; patient and physiological monitoring devices, namely, devices for monitoring ECG signals, blood oxygen levels, pulse rate, respiration rate, temperature, blood pressure and/or anesthesia agent level, for use with magnetic resonance imaging systems