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 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.
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,
the images will be reviewed 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.
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.
Oral contrast is usually given for CT scans that include the
abdomen and pelvis. The oral contrast is swallowed and coats the
gastrointestinal tract. The intestines then appear white on the CT
images. You will be given this oral prep and instructions from your
Physician or you will need to pick it up from our office the day
before your appointment.
Two types of substances serve as oral CT contrast. Barium
sulfate is similar in consistency to a milkshake. Gastrograffin is
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.
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 for the detection of asymptomatic heart disease that are simple
non-invasive exams that we perform in our facility.
PREPARATION:
Head/Neck or Chest
Abdomen and /or Pelvis
- Oral prep must be consumed 4 hours prior to exam. If the exam
is scheduled in the early morning, prior to 9am, the patient may
drink ½ of the prep at bedtime, the night prior to the exam
and the remaining prep 2 hours prior to the exam that morning.
- The patient may not eat after oral prep is consumed. Clear liquids
are allowed. This includes water, plain Jell-O and bouillon.
- No caffeine is allowed after the prep.
- After completion of the exam, the patient is encouraged to drink
plenty of liquids to evacuate the remaining barium.
- Oral prep may be refrigerated.
- Medications may be taken as normal.
If you have any questions, Please feel free to call us at 540-581-0882
between 7am-7pm M-F.
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. Pre-medication 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 pre-medicated.
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.
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