Armrit Study Guide Packet With Complete Solutions

ANTENNA {Ans: A DEVICE ENABLING THE SENDING AND / OR RECEIVING OF ELECTROMAGNETIC WAVES}BASIC MR IMAGING TECHNIQUE {Ans: -A PATIENT IS PACED INT EH ISOCENTER OF A LARGE STATIC HOMOGENEOUS MAIN MAGNETIC FIELD. -PULSED RADIO WAVES ARE DIRECTED TOWARD THE PATIENT'S BODY -HYDROGEN PROTONS WITHIN THE PATIENT'S BODY INTERACT WITH AND RETURN THE RADIO WAVES. -HIGH AND LOW INTENSITY SIGNALS ARE DETECTED AND MEASURED -AN IMAGE OF THE PATIENT'S BODY IS GENERATED AND RECONSTRUCTED CONTAINING BRIGHT, GRAY, AND DARK AREAS THAT CORRESPOND TO THE HIGH AND LOW INTENSITY SIGNALS.}PARAMETERS OF TISSUE WEIGHTING {Ans: MEASURED IN MILLISECONDS (ms), THOUSANDS OF A SECOND. PHYSICAL CHARACTERISTICS OF TISSUES ARE REPRESENTED EPLOYING THE SPIN-ECHO PULSE IMAGING TECHNIQUE SIMPLY BY MANIPULATING THE PARAMETERS TR & TE.}ELECTROMAGNETIC ENERGY (EME) {Ans: ELECTROMAGNETIC ENERGY IS AN ELECTRIC AND MAGNETIC DISTURBANCE THAT TRAVELS THROUGH SPACE AT THE SPEED OF LIGHT, SYMBOLIZED BY ASINE WAVE THAT HAS TWO COMPONENTS OF MEASUREMENT, WAVELENGTH AND FREQUENCY.}FLIP ANGLES (NUTATION ANGLE) {Ans: AFTER RESPONDING TO AN RF PULS, M ROTATES AWAY FROM THE LONGITUDINAL POSITION BY A SPECIFIC DISTANCE (OR ANGLE). RF PULSES ARE NAMED AFTER THE FLIP ANGLES THEY INDUCE (IE 90 DEGREE RF PUSEES RESULT IN 90