Computed Tomography
Chest Scan
What is a CT Scan of the Chest? A CT Scan (sometimes referred to
as a CAT Scan) is a noninvasive medical test to diagnose medical
conditions. A CT Scan combines special x-ray equipment with
sophisticated computers to produce multiple cross sectional images
of the inside of the body. These cross-sectional images of the
area being studied are examined on a computer and can be
transferred to a CD.
A CT scan of the chest can visualize internal organs, bones,
soft tissue and blood vessels. If intravenous (IV) contrast
is used, it provides greater clarity and can reveal more details
than regular x-ray exams.
How do I prepare for this Test? Please wear
comfortable, loose-fitting clothes to your exam. You may be asked
to change into a hospital gown for your comfort. You must not
eat or drink anything for 2 hours prior to your exam. If
necessary, you may take your daily meds with a small amount of
water. Please bring a list of all your current
medications and allergies. We can make a copy of your medication
list if needed. Please report to the Outpatient Registration
Department 15 minutes prior to your scheduled exam
time. Outpatient Registration and Radiology Departments are
located on the first floor of Beverly Hospital, Lahey Outpatient
Center, Danvers and Addison Gilbert Hospital. The
technologist will greet you in the Radiology Department and escort
you to the exam room.
What to Expect During the Chest CT? Although you may or may
not receive IV contrast, you will be required to answer questions
that our Technologist will review with you. The decision to
administer IV contrast will be made by your ordering MD and/or our
Radiologist. The technologist will position you on the table
lying on your back. If you will receive contrast, an IV will
be inserted in a vein in your arm. You will feel a pin prick when
the needle is inserted. When the IV contrast is administered,
you may feel a warm, flushed sensation and a metallic taste in your
mouth that lasts for a few minutes. You may also experience a
sensation like you have to urinate but this subsides
quickly. The table will move quickly through the scanner to
determine the correct starting position for the scan. Then
the table will move moreslowly through the machine as the actual CT
scanning is performed. You will be alone in the exam room
during the CT scan, unless there are special
circumstances. However, the technologist will always be able
to see, hear and speak with you at all times giving you
instructions.
Testing Time: The entire examination is usually completed
within 15 minutes.
Risk of the Test: Be sure to notify the technologist if
there is any chance you may be pregnant or allergic to IV
contrast.
Following the Test: After your CT exam, you will be
instructed to drink plenty of fluids to flush out the IV
contrast. If you take a regular dose of Glucophage
(Metformin), you MUST discontinue taking it for 48 hours following
your exam. It is necessary to have a blood test in 2 days to
determine that your kidneys are functioning properly BEFORE you
resume your Glucophage. We will fax your ordering physician
to inform them of your need for a blood test. You will
also receive a letter from us reminding you of this. There
are no other restrictions following the CT exam.
Results of the test: Your ordering physician will receive
the results within 24-48 hours. It is important to discuss
the results of the exam with your doctor.
