Table of Contents Table of Contents
Previous Page  21 / 58 Next Page
Information
Show Menu
Previous Page 21 / 58 Next Page
Page Background

19

NCCN Guidelines for Patients

®

:

Lung Cancer Screening, Version 1.2017

3

Should you start now?

The LDCT test

The LDCT test

LDCT takes many pictures of the inside of your body

from different angles using x-rays. The amount of

radiation used is much lower than standard doses

of a CT (

c

omputed

t

omography) scan. Contrast dye

should not be used for screening LDCT.

Before the test

You should remove any metal objects on your body.

These objects can affect the pictures taken of your

lungs. The machine is large and has a tunnel in the

middle.

See Figure 5

. During the test, you will lie

on a table that moves through the tunnel. Pillows or

straps may be used to keep you still during the test.

You will be alone in the room, but a CT technologist

will operate the machine in a nearby room. The CT

technologist can see you and the machine through

a window. He or she will be able to hear and speak

with you at all times.

During the test

You will be asked to take a deep breath and hold it in

for a few seconds while the pictures are taken. This

is done to make sure the images are of good quality

and not blurry. As the machine takes pictures, you

may hear buzzing, clicking, or whirring sounds. While

it only takes seconds to take the pictures, the whole

process takes about 20–30 minutes.

Figure 5.

Computed tomography

A CT machine is large and has a

tunnel in the middle. During the

test, you will need to lie on a table

that moves through the tunnel.