Echelon PP And C Book File - Home Hitachi Healthcare

E.CHE.LON --------------------0Chapter 2 -Positioning the PatientIn o rder to acquire an image of a particular anatomical reg io n, the patient mustbe properly positioned on the Echelon MRl System patient table using one ormore pads, then fitted with the appropriate coil. The patient table is equ ippedwith lasers to guide you in positioni ng the patient outside the magnetic field.Once you have centered the region to be studied, you can move the patient intothe magnetic field, w here the imaging w ill be perfom1ed.General instructions about the Eche lon MRI System control panels and theproper use of the imaging hardware are provided in this chapte r. Patientpos itioning terms, operation of the patient alert bulb, and patient tablepreparation directio ns are also included.Gantry and Patient Table DataThe gantry is designed w ith a short bore and w ide aperture to create an invitingpatient env ironment w ithout compromising c linical utility. Whi le the large,high-capacity patient table comfortably supports a broad range of body types,the limits listed below shou ld be followed.QS4-52789v2oPatie nt aperture (diameter): 24 in. (61 em)oWeig ht limit:-Motor-driven: 400 lbs. ( 180 kg)-Manual longitudina l movement: 500 lbs. (225 kg)oPatie nt table w idth: 28 in. (70 em)oTotal longitudinal travel: 9.2 ft. (280 em)oVertical range: 19 .5-33.5 in. (49.5-85.2 em)oClass II laser pos itio ning:- I mm accuracy-Automatic movemen1 to isocenter2. 1

E.CHE.LON""' MRI System Patient Positioning and Coils ManualTerminologyThe following terminology is used throughout this manual to ensure clear andexplicit instructions: References to the foot of the patient table indicate the end of the patient tablefarthest from the magnetic field. References to the head ofthe patient table indicate the end of the patient tablenearest to the magnetic field. References to the right or left side of the patient table indicate the sides as ifyou were standing at the foot of the patient table looking at the magnet.Patient SafetyWhile you are positioning the patient on the patient table, and whi le the patientis in the magnetic field, you must constantly monitor the patient's safety. Makesure that the receiver coil cable remains away from the patient and that thepatient does not make contact with the gantry while the patient table is moving.WarningDo not allow persons with pacemakers or other implanted devices to enter theControlled Access Area (within the 5-gauss field). The strong magnetic fieldcould cause such devices to malfunction and pose a risk of serious injury ordeath to the person.WarningDo not introduce ferromagnetic materials (such as tools, scissors, gurneys,cleaning equipment, and simi lar items) into the magnetic field. The strongmagnetic field can cause these materials to act like projectiles, drawing theminto the system. Failure to comply could result in death or serious injury.WarningPatients requiring emergency treatment or assistance must be removed from theControlled Access Area. Their proximity to the magnet could prevent the safeand effective use of electronic and/or metallic emergency medical equipment.Failure to comply could result in death or serious injury.2-2Copyright @2013 by Hitachi Medical Systems America, Inc. All rights reserved.

Positioning the Patient0Patient Alert BulbAfter positioning the patient on the patie nt table and fitting him or her w ith theappropriate coil and pad(s), you should offer use of the patient a lert bulb. Whensqueezed, this dev ice beeps to a lert you that the patient needs assistance during aprocedure. Always offer this device to patients, especially those who havehearing impairments.The patient alert bulb contains dry natural rubber, which may be problematic forpatients with latex a llergies.For detailed safety info rmation, refer to Chapter I, Safety, in the Echelon MRISystem Reference Manual.QS4-52789v22·3

E.CHE.LON""' MRI System Patient Positioning and Coils ManualGantry Control PanelsThe gantry control panels provide all the functions for operating the patienttable. All patient positioning controls are located on the gantry control panels.Identical control panels are located on the right and left sides of the front of thegantty.Emergency patient table stopREI.E.ASEEmergency patient table release0Up/down move positionLongitudinal move counterClears the longitudinal move counterScan status displaySCANIn/up out/down moveLaser localizeron/offSet mode transit/set moveScan suspend/resumeStart/stop ventilation in gantry2-4Copyright @2013 by Hitachi Medical Systems America, Inc. All rights reserved.

0Positioning the PatientGantry ControlPanel ButtonFunctionDescriptionEmergency patient tablestopQuickly stops operation of the patient table and keeps the stateof emergency stop until the RELEASE button is pressed. In thestate of emergency stop, all contro l panel buttons are turned off.Emergency patient tablere leaseReleases the patient table from the state of emergency stop.Up/down patient tableposition indicator : Hig hest position'V : Position other than the highest position.Longitudina l movecounterIndicates the position of longitudinal direction (forward andbackward). When the origin (the back end of longitudina ldirection) has not been detected right after the control programhas been started, it is unlit.0C lears the longitud inalmove counterClears the longitudinal move counter to 0. If it is pressed duringthe set mode, the set mode is re leased.SCANScan status displayLit during the scan.0c}BBBBCI. ARWhen the patient table is not at the highest position, the JN/UPBrings the patient table tobutton functions as an ascending button. As soon as the patientthe up pos itiontable reaches the highest pos ition, the laser localizer is lit.(f);'Moves the patient tableinto the magnet boreWhen the patient table is at the highest position, the IN/UPbutton functio ns as an advance button.Forward (slow)If the IN/U P and OUT/DOWN buttons are pressed at the sametime during a forwa rd move, the patient table moves forward atslow speed.SetMoves the laser-localizer area of interest to the isocenter of themagnet.Speed fixedIf the IN/UP button is pressed again (re leased once and pressedaga in rig ht away), the current speed is maintained. . ' 'Except in cases of true emergency, do not use the emergency patient table STOPbutton. Routine use can lead to equipment fai lure due to excess wear and tear.QS4-52789v22·5

E.CHE.LONT"" MRI System Patient Positioning and Coils ManualGantry ControlPanel ButtonWhen the patient table is not at the back end of the longitudinalmove, the OUT/DOWN button functions as a backward button.Out (s low)If the OUT/DOWN and IN/UP buttons are pressed at thesame time during a backward move, the patient table movesbackward at slow speed.DownWhen the patient table is at the back end, the OUT/DOWNbutton functions as a descending button. As soon as the lowestposition is reached, the laser localizer goes out.Speed fixedJfthe OUT/DOWN button is pressed again (released once andpressed again right away), the current speed is maintained.Set mode transit I setmoveMoves the patient table to position the area of interest at thecenter of the magnetic field. The patient table move is carriedout while the SET button is kept pressed. During the set mode,the SET button LED blinks and the longitudinal move countershows the remaining distance. When the patient table move iscomplete, the laser localizer goes out.Speed fixedJf the SET button is pressed again (released once and pressedagain right away), the current speed is maintained.Laser loca lizer on I offWhile the LASER button is lit, the localizer laser is on. T hislaser is used for aligning the area of interest.Scan startStarts the scan.Scan suspend I resumeSuspends or resumes the scan.Scan stopStops the scan.GStart/stop ventilation ingantryBlows air inside the bore. Blower can be set to high, low, oroff.8On I off il luminationControls the illumination light inside the gantry. Brightness canbe adjusted by two steps or turned off.'''''f )).·.--·'.' #f!J088882-6DescriptionOut,''FunctionCopyright 2013 by Hitachi Medical Systems America, Inc. All rights reserved.

0Positioning the PatientPreparing the Patient TablePatient table preparation involves selecting and plac ing the table pads and theradio frequency (RF) coi l(s). The appropriate pads and coil(s) are essential toacquire optimal images. Fo llow these steps when preparing the patie nt table:Note:The patient table must be movedcompletely out of the magnetbefore its height can be adjusted.I.Press and hold the O UT/ DOWN button to move the patient table complete lyo ut of the mag netic field, then lower the patient table to a positio n where thepatient can easily sit on it.2. Select the appropriate table pads and RF receiver coi l and positio n them onthe patient table. Your c hoice of pads will be affected by three factors: thea natom ical regio n to be imaged, the s ize of the patient, and the coil you planto use.Positioning the Patient for an Examination in the MagnetPatient positioning invo lves using a variety of table and patient positioningpads, placing the RF coil(s) on or around the patient in a variety of ways, andproperly centering the anatomical region to be imaged. Although each patientand examination are different, the basic patie nt positioning procedures remainthe same.Various table pads and positioning pads and spo nges are avai lable for use withthe Eche lon MRI System. In add itio n to providing some degree of comfo rtfor the patient, the pads help to support and position both the patient and thecoil. Pads can be used in a variety of combinations, depending upon the regionof interest, the coil you plan to use, and the s ize of the patient. The detai ledpositioning instructions in the next chapter w ill suggest the appropriate pads touse under many circumstances.QS4-52789v22·7

ECHELON""MRI System Patient Positioning and Coils ManualFor patient comf01t, use the knee cushion with virtually all scans when thepatient is supine (except hip imaging). When a patient is prone, Hitachirecommends placing a pillow under the ankles.Do not use too many pads, as this might raise the patient too high in the staticfield.ACautionSecure long hair before moving the patient onto the imaging table. The patient'shair could become caught in the patient table mechanism. Failure to complycould cause patient injury.1. Ask the patient to sit on the side ofthe patient table and then lie down.2. Press and hold the IN/UP button until the patient table reaches the upperlimit.3. Position the anatomical region in the center of the selected RF coil. Addpositioning pads and sponges as needed.Make sure that all coils placed on the patient table are plugged into a tableconnector. Disco1mected coils could cause patient injury or be damaged ifexposed to RF energy. Remove any coils not being used for the selected scanprotocols.ACautionSome coils consist of two pa1ts that lock together. Be sure that the patient's hair,skin, clothing, and/or other foreign material does not get caught between the twocoil parts.WarningInstruct the patient to close his or her eyes when the lasers are on. Do not stareinto the beam, as eye injury may result.2-8Copyright 2013 by Hitachi Medical Systems America, Inc. All rights reserved.