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Magnetic Resonance
Imaging
Macy Atkins
What is Magnetic Resonance
Imaging?
 Also known as MRI
 Pictures of structures inside the
body formed by a magnetic
field and pulses of radio wave
energy
 May show things that other
imaging techniques cannot
show
 Structure being viewed is
placed inside special
magnetic machine
History
1946 Bloch and
Purcell
1977 –
Mansfield;
first human
MRI
1971 –
Damadian
1952 –
Nobel Prize
1973 –
Hounsfield
2003 –
Lauterbur
and
Mansfield
Why are MRIs done?
 Tumors
 Infection
 Blood vessel diseases
 Bleeding
 Injury
 Expand on issues seen with
other imaging methods, if
needed
What can an MRI be done on?
Head
Chest
Blood vessels
Abdomen
Pelvis
Bones
Joints
Spine
Benefits of MRI
 No ionizing radiation
 Diagnoses a wide variety of
conditions
 Discovers abnormalities, diseases,
etc. that other imaging systems
might not show
 Noninvasive alternative
Risks of MRI
 Medical or electronic devices
 Pacemaker
 Metal clips
 Artificial heart valves
 Metallic joint prostheses
 Bullet, shrapnel
 Cochlear implants
 Implantable heart defibrillator
 Pregnancy
 Liver or kidney problems
MRI Limitations
 Patient has to be still and follow breathing techniques
 Very large patient may not fit into machine
 Implant or metallic object could interfere
 Irregular heartbeat could cause issues
 May not distinguish between cancer tissue and fluid
MRI Machines
High-Field MRI Scanners
•Closed scanner (aka “tube” or “tunnel”)
•Provides fast scan times and great image quality
Low-Field MRI Scanners
•Open scanner
•Useful for claustrophobic or overweight patient
Stand-Up MRI Scanners
•Useful for those who are unable to lie down
•Used for the spine and joints
Extremity Scanners
•Limited use; specifically for extremities
•Not many available
How to prepare for an MRI
 Eat normally
 Take medications regularly
 Change into a gown
 Remove artifacts
 Dentures
 Wigs
 Hair clips
 Glasses
 Watches
 Bras
 Hearing aids
 Jewelry
What happens during MRI scan
 Patient lies on movable table that slides in a tube
 Patient listens to music or has ear plugs in
 Sometimes contrast may be injected through IV
 Can lasts up to an hour or more
 Patient has to be very still
Results of MRI scan
 MRI Tech sends images to physician
 Physician analyzes the images
 Reports to family doctor
 Doctor discusses results with the patient
MRI Technologist Requirements
 Education
 Associate’s degree in Radiologic Technology
 1-2 years of further study in MRI Technology program
 Training
 Clinicals
 Licensing
 American Registry of Magnetic Resonance Imaging Technologists
MRI Technologists Duties
 Interpret doctor’s instructions
 Explain MRI process to patient
 Choose software options on MRI
machine
 View images
 Keep results records
 Move equipment
 Prepare patient
 Move and position patients
MRI Technologists Skills
 Written communication
 Verbal communication
 Compassion and sympathy
towards patient needs
 Attention to detail
 Ability to work with a team
 Capability to follow instructions
 Able to stand on feet all day
 Physical strength to move patients
 Able to work machine controls
Job Salary
Average Salary for MRI Technicians in Metro Areas Annually
Average Salary (thousands)
120
95
75
74
68
71
60
New York, NY
Los Angeles, CA
Houston, TX
Metro Areas
Tampa, FL
Philadelphia, PA
References
 http://www.webmd.com/a-to-z-guides/magnetic-resonance-imaging-mri
 http://web2.uwindsor.ca/courses/physics/high_schools/2006/Medical_Imag
ing/mrihistory.html
 http://www.radiology-schools.com/mri-technician-salary.html
 http://www.radiologyinfo.org/en/info.cfm?pg=bodymr
 http://www.livestrong.com/article/96879-types-mri-machines/
 http://www.mayoclinic.org/tests-procedures/mri/basics/results/prc20012903
 http://study.com/mri_technician.html