MRI

Magnetic Resonance Imaging, or MRI, is an advanced, state-of-the-art radiology method that produces very clear images of the human body without the use of X-rays.

At NWH in Mt. Kisco, New York and at the Yorktown Imaging Center in Yorktown Heights, NY, we offer a high-definition MRI that uses magnetic and radio waves to visualize the structure and function of the body and provide detailed images in any plane.  


Call 914.666.1583 to schedule an appointment at NWH Radiology
in Mt. Kisco.

Call 914.245.5200 to schedule an appointment at the Yorktown
Imaging Center in Yorktown Heights.


MRI Services at NWH

  • Breast MRI
  • LAVA- Liver Acquisition with Volume Acceleration — Specialized Liver Imaging
  • MR Angiography- Magnetic Resonance Angiography
  • Monitored sedation and anesthesia is available

MRI has much greater soft tissue contrast than Computed Tomography (CT or CAT scan), making it useful in neurological, musculoskeletal, cardiovascular, and gynecological imaging.

NWH’s MRI is accredited by the American College of Radiology (ACR).  ACR certification recognizes consistency and excellence in imaging.

How does MRI work?
The human body is made up of millions of atoms, that are magnetic.  When placed in a magnetic field, these atoms line up with the field, much like a compass points to the North Pole.  Radio waves, tuned to a specific frequency, tip these tiny magnets away from the magnetic field.  As they tip, they gain energy.  When the radio waves are turned off, the atoms try to realign with the magnetic field, releasing the energy they gained as very weak radio signals.  A powerful antenna picks up these signals and sends them to a computer, which performs millions of calculations to produce a black and white image for diagnosis.

The average MRI scan takes 5-15 minutes, with a complete exam running 20-60 minutes.  During this time, several dozen images may be obtained.  These images assist us in making the best diagnosis possible and may even eliminate the need for biopsy or surgery. 
 

See How to Prepare for your MRI

 

The MRI exam poses no risk to the average patient if appropriate safety guidelines are followed.  You can never have an MRI if you have any of the following:

  • Cardiac pacemaker
  • Implanted cardiac defibrillator
  • Implanted neurostimulator

 

Chest and Abdomen
Nearly every part of the body may be studied with MRI.  Organs within the chest and abdomen, such as the heart, liver, bladder, and kidneys can easily be seen.  The image at right gives a very detailed view of the kidneys (arrows) and spine (dividing the image from top to bottom) in the lower back.  The “tree-like” structures at the base of the spine are nerve roots.

Head and Neck

 

 

 

 

 

 

 

 

 

Bones and Joints

MRI is very sensitive to changes in cartilage and bone structure resulting from injury, disease, or aging.  The image at right is a normal knee as viewed from the side.  The patella or “knee cap” is indicated by an arrow.  Clear imaging often provides information not available through other medical testing and may actually eliminate the need for exploratory surgery.

Liver Acquisition with Volume Acceleration (LAVA)
LAVA is a specialized liver imaging study used with MRI to overcome normal organ motion to provide for better abdominal image quality.  It offers more speed, more resolution, and more coverage than conventional MRI.

LAVA produces excellent abdominal image quality on patients who have difficulty holding their breath.  It scans the entire liver of a patient in a single breath-hold every time.  LAVA achieves 25% better resolution with 25% more coverage at a speed unmatched by standard MRI.

                         Standard MRI                                                                 LAVA HD MRI
                     1.5mm resolution                                                         1.2mm resolution
                    23 sec breath-hold                                                        17 sec breath-hold


 

                           1.5mm resolution                                                   1.2mm resolution

                          23 sec breath-hold                                                   17 sec breath-hold

MR Angiography
MR (Magnetic Resonance) Angiography is a procedure in which blood vessels (arteries or veins) are injected with a contrast material that shows up on MRI (Magnetic Resonance Imaging) to detect narrowing or blockages.

 

 

 

 

 

 

 

 

The procedure may be for diagnostic purposes (Diagnostic Angiography) at which time only images of the blood vessels are obtained.  Or the procedure may include treatment (Interventional Angiography), which includes inserting a small stent to inflate and open the vessel.

All scans are interpreted by White Plains Radiology Associates, PC, the professional radiology group at NWH.  WPRA has 50 board-certified Radiologists on staff with expertise in multiple areas of diagnostic imaging including: nuclear medicine, diagnostic radiology, women's imaging, pediatric radiology, neuroradiology, and interventional radiology.