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Diagnosing
Mesothelioma & Imaging Techniques
Used - Computed Tomography (CT) scans,
Positron Emission Tomography (PET)
scans, Magnetic Resonance Imaging
(MRI) scans and X-rays
i)
Computed
Tomography (CT) Scans
If
your x-ray image shows any abnormalities
(such as fluid buildup causing the
heart to grow bigger or any tumors
in the chest, pelvis or abdomen),
your doctor will ask to perform a
Computed Tomography or CT scan on
you. A CT scan is a radiographic process
that blends multiple xray images into
a 3 dimensional cross–sectional
x–ray image. A CT scan machine
will rotate 180 degrees over the patient's
body while thin xray beam lights will
be signalled to the inside structures
of the body thus taking xray pictures
from many different angles. This will
create a detailed picture of the lungs,
abdomen and heart of the body allowing
the radiologist to observe clearly
the health of the lungs and pleura.
ii)
Positron
Emission Tomography (PET) Scans
A Positron Emission
Tomography or PET Scan is a technique
that is becoming very popular among
doctors these days because it can
take multiple pictures of the body's
biological functions. This can help
detect how far mesothelioma has spread
into the patient's body, and whether
the human cells are malignant or not.
What makes PET scan different from
X-rays, MRIs and CT scans is that
Pet scans shows the metabolism or
chemical functions of an organ in
the body, or sample tissues.
iii)
Magnetic
Resonance Imaging (MRI)
An
MRI scan is used to determine the
extent of any tumor created due to
asbestos exposure before a treatment
plan is developed for the patient.
The advantage to using MRI scans to
detect tumors is that they provide
images in multiple planes thus being
able to better identify any tumors.
MRI scans are also very accurate in
detecting enlargement of mediastinal
lymph nodes which are the two lymph
nodes between the two lungs. Enlargement
of the mediastinal lymph nodes signals
a higher chance of tumor development
and/or malignant cells.
Magnetic Resonance
Imaging (MRI) uses a specialized computer,
radio waves and a powerful magnetic
field to capture images of internal
body organs, bones and soft tissues
as well as many other internal body
structures. These images can then
be printed out or examined on a computer.
The advantage of using MRI to X-rays
is that MRi does not produce radiation.
iv)
X-Rays
X-Ray
is the most popular and cost effective
method for detecting any tumor related
to mesothelioma. Doctors can determine
how far the cancer has spread by taking
several shots of the chest. The X-Ray
tube is pointed to the part of the
chest where a picture is supposed
to be taken. This produces a beam
and a small burst of radiation passes
through the body taking an image recorded
on a special type of film. X-rays
are literally painless, as opposed
to PET scan where they may be some
degree of pain thanks to the FDG injection
that is inserted through the chest.
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