CT stands for computed tomography. It is a
test that combines x-rays with a computer to create images that appear
as slices. The result is a detailed group of images that help diagnose
problems with soft tissue (such as the lining of sinuses), organs
(such as the brain, liver, kidneys or lungs) and bones.
How do I prepare for a CT scan?
You may be asked to fast for four hours before
the exam. When you arrive for your appointment, you may be asked to
drink contrast for one-half hour to two hours before the actual scan
is started.
Our radiology assistants will tell you when you
make the appointment what instructions you will need to follow.
What is a contrast agent?
Contrast agents are special liquids that enhance
the accuracy and quality of the CT scan. They are given in three ways:
- By mouth: The liquid is ingested for CT scans
of the chest, abdomen and pelvis areas to fill the stomach and
intestines. In some cases the liquid may cause cramps and diarrhea.
- By rectum: A small liquid enema is given for
some CT scans of the pelvis to fill the colon. This liquid may cause
cramps.
- By vein: a dilute iodine contrast material is
injected into an arm vein to enhance all soft tissue organs. Most
patients will experience a hot feeling ,especially in the neck and
groin. The hot feeling goes away quickly.
Allergic reactions are extremely rare; however,
please inform the CT staff if you have any known allergies.
What will happen during a CT scan?
You may be asked to change into a gown. You will
then lie on a platform that slides into a doughnut-shaped hole. It is
open on both sides. The technologist may ask you to hold your breath
for a few seconds. You also may be given contrast material as
described above. You will be asked to wait briefly to make sure the
images are complete.
How will I get my test results?
Your examination will be interpreted by a
board-certified radiologist, who will transmit the report to your
doctor. Your doctor will discuss the results of the examination with
you. Unless you are instructed otherwise by your doctor, you may
resume your normal activities and go back to your normal diet after
the CT scan.
Other common questions:
Q. Do I have to remain still during the
entire examination?
A. You do have to
remain as still as possible. But the scan does not take very long. You
may be asked to hold your breath during the scan. The technologist
will give you all the instructions.
Q. How long will the examination take?
A. That will depend
on what is being studied. You may be asked to come one-half hour to
two hours before your scan to drink contrast material; you will be
monitored in our waiting room. The scan itself only takes a few
minutes. However, always allow extra time for the exam, in case the
exam lasts longer than expected.
Q. What kind of CT scanner will be used for
my exam?
A. Kearney Imaging Center has a state-of-the-art
Philips Gemini GXL 16 slice PET/CT system. It offers dependable
medical technology, delivering reduced radiation dose to patients
while providing consistent, high-quality images to aid in diagnosis.
Q. Will the CT scan hurt?
A. No. Because a CT
scan is an x-ray procedure, there is no direct pain caused by the
exam. However, we may utilize a contrast agent to improve the study.
The possible side effects are described under contrast agents.
Q. Will I be enclosed in a tunnel?
A. No. CT scan is
done with a doughnut-shaped machine. The part of the body being
scanned is placed in the middle of the doughnut. It is open on both
ends.
Q. Do I have to fast before the scan?
A. That will depend
on what part of the body is being scanned. If we do require you to
fast before the exam, you will receive instructions when the scan is
ordered.
Q. Will the CT technologist be with me?
A. Yes. You will be
in contact with a CT technologist at all times. Even when the
technologist is not directly in the CT room, you will be able to talk
to him or her by intercom. The CT technologist is always able to see
you through a large patient-viewing window.
Q. Will the CT scan make a lot of noise?
A. No. The CT scan
sounds like a whirring sound as the machine rotates around the
doughnut.
