FINAL DRAFT 9/28/95
Magnetic Resonance Imaging
Narrative
I. General Considerations
II.Functional Considerations
A. Overview
A. Operations
1. Current Direction
1. Services
Magnetic Resonance Imaging (MRI) is a
Magnetic Resonance Imaging is a program
specialized
diagnostic
imaging
tool
under Radiology Service. MRI should be
employing a strong magnetic field and the
coordinated
with
associated
and
application of a radio frequency pulse to
complimentary diagnostic services to
measure vector deflection of selected
assure coordination of patient care.
atomic nuclei.
a. Imaging Process
MRI is particularly useful in providing
images of soft tissues.
MRI is performed on inpatients and
outpatients on a regular and scheduled
MRI is contra-indicated for patients with
basis. Services are also performed on an
cardiac pacemakers or ferro-magnetic
unscheduled basis for emergency patients.
aneurysmal clips.
MRI uses strong magnetic fields to induce
The emitted magnetic field can effect
molecular resonance which creates radio
CRT's and information systems. Therefore,
frequencies. These frequencies allow a
great care must be employed in selecting a
computer image to be created by the
site location for the MRI.
analysis of measurements of frequencies
emitted by resonating cell structures.
Patient volume can be anticipated to be
primarily 80-90% outpatient volume.
The image is electronically enhanced,
recorded on video, stored on tape or optical
When shared among multiple medical
disk and reproduced as a laser image. The
centers, mobile MRI units (docked to areas
image can also be outputted to paper or
with appropriate patient and staff spaces)
film copy.
may be a viable alternative to fixed MRI
2. Patient Care Concept
units.
2. Trends
MRI remains a centralized function due to
the high cost of the technology, the highly
specialized space criteria (dictated by
Magnetic
Resonance
Angiography
permanently installed equipment), and the
technology is increasingly used.
specialized
staffing
requirements.
MRI in combination with computed Axial
Tomography (CT) for comprehensive
screening of diseases that are difficult to
diagnose in early stages (such as multiple
sclerosis) is also increasingly used.
VA DESIGN GUIDE
MAGNETIC RESONANCE IMAGING
PAGE 2-1
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