NCCN Guidelines for Patients
Hodgkin Lymphoma, Version 1.2015
Imaging tests make pictures (images) of the insides
of your body. They can show where cancer is.
Depending on the test, you may need to stop taking
some medicines, stop eating and drinking for a few
hours, and remove metal objects from your body. If
you are nervous, you may be given a drug, called a
sedative, to help you relax.
Imaging machines are large. You will likely be lying
down during testing. At least part of your body will
be in the machine.
shows a CT machine,
which is described next.
After the test, you will likely be able to resume your
activities right away. If you took a sedative, you will
have a waiting period. You may not learn of the
results for a few days since a radiologist needs to see
the pictures. A radiologist is a doctor who’s an expert
in reading the images.
Diagnostic CT (
omography) may be
needed before treatment. It isn’t needed if you
receive an integrated PET/CT. Integrated PET/CT is
CT takes many pictures of a body part from different
angles using x-rays. A computer combines the x-rays
to make detailed pictures. A contrast dye is used for
diagnostic CT. It makes the pictures clearer. The dye
will be injected into your vein and mixed with a liquid
you drink. The dye may cause you to feel flushed or
get hives. Rarely, serious allergic reactions occur. Tell
your doctor and the technicians if you have had bad
reactions in the past.
What part of your body will be imaged depends on
where the cancer might be. Often, CT of the neck,
chest, belly area, and between the hip bones is
done. CT of your neck is needed if your neck may
be treated with radiation. Also, the areas that look
abnormal on PET/CT should be imaged.
omography) is the use of two tests. These tests are
PET and CT. Some cancer centers have one machine
that does both tests at the same time. This is called
an integrated PET/CT. At other centers, the scans are
done with two machines. If you’re able, you should
lie on a flat table with your hands above your head
during the test.
Figure 2.1 Computed tomography (CT)
A CT machine is large and has a tunnel in
the middle. During the test, you will lie on a
table that moves slowly through the tunnel.