CT
Scan
 Computed
Tomography is an advanced system producing
images of the body much like the slicing of a loaf of
bread. It is a highly sensitive method to accurately
view the internal anatomy and detect extremely small
lesions. Utilizing high speed computers, the CT obtains
360 degrees of X-Ray information. This is processed
into single slice images for display on a monitor and
can be reproduced on film or high quality photographic
paper.
Our GE Light Speed Plus CTs
with helical scanning capability significantly shorten
examination time and reduces the volume of intravenous
non-ionic
contrast material administered while providing exceptional
resolution. Helical scanning produces, during a single
breath hold, multiple contiguous slices so that extremely
small lesions are not obscured. These features enhance
diagnostic sensitivity, earlier detection, and consistent
follow-up of pathology while allowing improved patient
comfort. East River is ACR Accredited to perform CT
studies.
During the scan, you
will be asked to rest motionless on a padded table for
5 to 15 minutes depending on the area to be scanned.
The table moves every few seconds as the images are
obtained. You will hear faint humming, and clicking
sounds. After the images are taken, a radiologist will
review the images to make sure all of the area has been
covered. Sometimes because of breathing or motion inside
the body additional images are needed. Additional images
do not mean there is a problem.
Depending on the part of the body
being scanned different contrast materials
are used. Very often contrast is given through the vein
(intravenous). The contrast we use is non-ionic
iodinated contrast. Even though this is significantly
more expensive than other ionic contrasts, it has been
clearly shown to cause less side effects. We only use
non-ionic contrast. No additional cost is incurred to
the patient even though insurance companies will not
reimburse for this. Although reactions are quite rare,
it is not unusual to get a flush feeling during the
exam or a metallic taste in the mouth. This typically
lasts for less than a minute. This is necessary to allow
adequate filling of the intestines which helps in the
proper interpretation of the study.
If you
have an iodine allergy or have had a
reaction to contrast in the past you should notify the
office when you are making the appointment and also
at the time of the scan so that we can take additional
precautions to avoid a problem. If you are taking a
diabetic medication called Glucophage,
please alert us at the time of your appointment because
arrangements need to be taken since this may react with
the IV iodine and result in kidney problems.
Oral contrast is usually given
for CT scans that include the abdomen and pelvis.
The oral contrast is swallowed and courses throughout
the gastrointestinal tract. The intestines then appear
white on the CT images.
Two types of substances serve
as oral CT contrast. Barium sulfate is similar
in consistency to a milkshake. Gastrograffin is a water
based drink containing iodine and is generally mixed
with fruit juice. Patients usually need to drink about
32 oz. of either contrast to adequately fill the stomach
and intestines. Minor side effects, such as constipation
or diarrhea, may occur.
For CT examinations that include
the pelvis, you will be asked to arrive an
hour before the actual scan time to drink. For a CT
scan of the abdomen you will be scheduled to arrive
a half hour before scanning. This is necessary to allow
adequate filling of the intestines, which helps in the
proper interpretation of the study. You will be seated
in our waiting room during this period. Reading material
will be available, however, feel free to bring your
own.
Screening examinations have
become important parts of healthcare utilized to detect
disease before it becomes clinically problematic. Currently,
Screening Chest CT for the early detection of lung cancer
and Coronary Artery Calcium Scoring for detection of
asymptomatic heart disease are simple non-invasive exams
that we perform in our facility.
PREPARATION:
Head/Neck
or Chest:
|
Nothing to eat or drink four hours
prior to examination. |
Abdomen
and/or Pelvis
|
Clear liquid diet for 12 hours prior to exam.
Liquids include clear juices such as apple, cranberry
and grape, clear soups, Jell-O, coffee, or tea.
No milk products or carbonated beverages. |
Spine/Bone
or Joint
|
No preparation necessary. |
If
you have a history of an allergy to
iodinated contrast, asthma, or a strong allergic history,
please notify the office when scheduling your exam.
Premedication may be necessary depending on the clinical
history. If indicated the radiologist or your referring
doctor can call your pharmacy. When arriving at the
office for your appointment, please notify the front
desk and the technologist performing the examination
if you have an allergic history or have been premedicated.
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