Computed
Tomography, CT Scan (or Computer Assisted Tomography/CAT
Scan) is a simple, non-invasive, and painless diagnostic
procedure. It utilizes xrays that focus on a specific area
of the body, gathering multiple images from different angles
to create a cross sectional and 3-dimensional picture. CT
images are unlike "general" xrays which produce
flat surface pictures. The information retrieved is processed
through a computer and depicts the organ or tissue being
scanned in excellent detail. In this way, abnormalities
may be detected more easily, potentially avoiding exploratory
surgery.
What CT
Scans are used for:
A CT
scan can be used for any part of the body. Some of the more
common examination areas include the head, chest, abdomen,
neck and heart. The technology at New
Hartford Scanner is also capable of doing full body
scans in which the entire body is examined.
Preparing
for a CT exam:
Most
CT exams do not require advanced preparation on the patient's
part. Certain exams require minor preparations. Your physician
will instruct you on whether or not your exam will need
such preparations. If instructions are given, be sure to
follow them closely and do not hesitate to ask questions.
Please
tell the office about any allergies you may have or if there
is a chance you might be pregnant.
During
most CT examinations, you are allowed to wear comfortable,
loose fitting clothing without metal. For some exams, you
will be asked to change into a gown which will be provided.
For
some exams, a contrast agent or "dye," will be
used. This dye outlines the organs and blood vessels being
examined, enabling a clearer picture to be obtained. If
this is the case with your exam, you will either be given
a fruit flavored drink containing a contrast agent or an
intravenous injection of the "dye." When an intravenous
injection is started, it is normal to feel a warm sensation
and to have a metallic taste in your mouth. This will pass
in a minute or two.
During
the exam:
The
exam usually takes between 10 and 30 minutes, but the actual
xray exposure time is much less than that. The technologist
will help position you on the examination table. The table
will move smoothly into the scanner, while the scanner rotates
around you. The scanner itself is very short and donut shaped
and open at both ends. It is unlikely that you will feel
confined at any time during the exam. Try to remain as still
as possible.
The
technologist will be monitoring the exam from an adjoining
room with a large window so you can see one another. You
will be able to converse with the technologist through a
two-way intercom at all times.
You
may be given instructions (such as to hold your breath for
a few seconds at a time) throughout the exam. Your cooperation
allows for a quick and smooth procedure.
It is
normal to hear whirring and clicking noises from the scanner
during the exam.
