Question 1

can all types of colon cancer be detected by ct scan or colonoscopy is necessary for detection?

Accepted Answer

Colon screening : To see inside the colon well ,  it needs to be cleaned very well  So a colonoscopy or a CT scan can be limited in its ability to detect cancer. A recent study, this month, found that special CT scans, designed to screen for colon cancer, were found to be as good (actually 1% better)  as a colonoscopy to detect cancer. Regular CT  scans can find colon cancer but not as good as a colonoscopy.

Question 2

i understand that a ct scan is better than a mri for detection of lung cancer; however, will a mri still pick up lung cancer most of the times?

Accepted Answer

: A low dose chest CT is usually recommended to screen for lung cancer. The MRI may reveal abnormal findings, if a CT was not indicated.

Question 3

does ct scan show cancer?

Accepted Answer

not always: Not all cancer is visible with a ct scan. There are many variables- size of tumor, location, presence or abscence of IV or oral contrast.

Question 4

do all cancers show on ct scan?

Accepted Answer

sadly, no: Not all cancer is visible with a ct scan. There are many variables- size of tumor, location, presence or abscence of IV or oral contrast.

Question 5

multiple ct scan can lead to cancer?

Accepted Answer

Each CT a person has: Ever so slightly increases the risk of developing cancer.  In most cases, the increased risk is too small to accurately measure.

Every test a person has, including cts, needs a risk to benefit evaluation.  For example, if a person is suspected of having appendicitis, then the potential risk of future cancer from the ct (very, very, very small!), is easily outweighed by the risk from appendicitis.

Question 6

could having a ct scan give you cancer?

Accepted Answer

Not likely: With the very rare exception of a few people with extreme susceptibility to cancer from radiation, it is highly unlikely that an average person will cancer from a ct scan.

Question 7

what are the cancers directly related to ct scan?

Accepted Answer

It is not Cut&amp; Dried: Excessive radiation can cause cancer.So all x-rays have this potential if you give a large enough dose by repeated testing. This is why we suspect ct scans can actually contribute to a few hundred new cases of cancer in the us each year. But where and who exactly got it,  is not possible to point out.

Question 8

can at pt and ct scan be used to diagnose cancer?

Accepted Answer

I am: Not sure what you mean by noncancer. However, a pet scan is a targeted exam used to either diagnose or follow human disease, usually cancer. Some cancers will not be seen because they don't accumulate sufficient glucose or are very small. There are multiple other causes of increased uptake of glucose that are noncancerous in origen.

Question 9

how can contrast make cancer stand out on a ct scan?

Accepted Answer

Blood supply: Cancers can either have more or less blood supply than the organs they are in. Without contrast the cancer and organ usually look similar in brightness. But when contrast is given the relative brightness level can become dramatically different based on the difference in blood supply and as a result the tumor is much easier to identify.

Question 10

can you tell me how contrast make cancer stand out in a ct scan ?

Accepted Answer

Vascularity: The contrast makes blood vessels whiter to stand out. Most tumors are hypervascular, they have more blood vessels. This makes them easier to see with contrast. Some tumors are not hypervascular and can be seen because they are less white than the surrounding tissues. Otherwise an MRI may be required to see the tumor.

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Doctor answers about:

Ct scan for cancer detection

A member asked:

Can all types of colon cancer be detected by ct scan or colonoscopy is necessary for detection?

A member asked:

I understand that a ct scan is better than a mri for detection of lung cancer; however, will a mri still pick up lung cancer most of the times?

A member asked:

Does ct scan show cancer?

A member asked:

Do all cancers show on ct scan?

A member asked:

Multiple ct scan can lead to cancer?

A member asked:

Could having a ct scan give you cancer?

A member asked:

What are the cancers directly related to ct scan?

A member asked:

Can at pt and ct scan be used to diagnose cancer?

A member asked:

How can contrast make cancer stand out on a ct scan?

A member asked:

Can you tell me how contrast make cancer stand out in a ct scan ?

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