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Doctor insights on: What Can A Ct Scan Detect

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Dr. Pamela Pappas
1 doctor shared a insight

Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


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Can a CT scan always detect a tumor?

Can a CT scan always detect a tumor?

Only at certain time: Bulky lesions in the retroperitoneum or masses growing off the bowel are frequently visualized. The same holds true for metastatic lesions to liver and lung. When we work up a patient for extensive surgical resection and want to be sure no metastatic focus is present to be addressed or might obviate the surgical procedure, a PET/CAT scan is employed where any malignant lesion lights up. ...Read more

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What can a pet scan reveal?

What can a pet scan reveal?

Several things: An f18-fdg pet scan will highlight cells in your body that are consuming glucose at a different rate (usually higher) than its surrounding tissues. A neoplasm with abnormal growth consumes more glucose and thus could be revealed with this test . It is a very sensitive but not very specific test. Several other things that are not neoplasms such as infections or inflammation would also be revealed. ...Read more

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How well can a CT scan detect a hysterectomy?

How well can a CT scan detect a hysterectomy?

Obvious: A hysterectomy should be pretty obvious on ct scan. Things will be missing and there may be surgical clips. ...Read more

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What can a CT scan show that an ultrasound can't show?

What can a CT scan show that an ultrasound can't show?

Better details: The resolution, details shown, on ct is more effective than that of ultrasound. Ultrasound shows liquids e.g. Cysts and effusion better and is cheaper but in obese patients ultrasound has limited penetration. Accordingly, ultrasound, in these patients, is usually replaced by ct that views fatty tissues better and penetrates as deep as needed for better resolution. ...Read more

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How do a pet scan and a CT scan differ?

How do a pet scan and a CT scan  differ?

Anatomic/physiologic: Pet scan involves intravenous injection of radio tracer usually f18 fdg.Imaging of whole body occurs for localization of areas of increased glucose metabolism. Malignant tumors usually most active.Ct scan involves x-ray and performs anatomic imaging of parts of body usually head, chest, abdomen, pelvis, or extremities. Pet?Ct combines imaging modalities for anatomic localization of areas of uptake. ...Read more

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Can a CT scan of abdomen detect cancer?

Can a CT scan of abdomen detect cancer?

Sometimes. : It depends on many factors, the size of the cancer, the organ it involves, technical factors with the study, etc. There are many variables. Remember each cancer starts as a single cell, so we can never completely exclude the diagnosis even when a ct is completely normal. Pet/ct can show cancers that are virtually impossible to see on ct, even with contrast. ...Read more

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What can a pet scan show?

What can a pet scan show?

What is the question: Currently pet scans are widely use for evaluation of glucose metabolism in the body. In oncology, is use to for initial metabolic characterization of tumors, metastases as well as for treatment response and surveillance. In cardiology, pet scans are use to assess heart ischemia and viability and in neurology the study is use to evaluate cognitive disorders, epilepsy and brain tumors ...Read more

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How do a pet scan and a MRI scan differ?

How do a pet scan and a MRI scan differ?

See below: An MRI or magnetic resonance imaging is a study that provides anatomical description of a part of your body. A pet scan can provide further information aside from how it looks or appears. It utilizes radioactive material or tracers that see how cells in your body function. It can detect cancer cells not evident on MRI or ct, heart disease, infection and even neurological conditions like dementia. ...Read more

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Can a CT scan detect gastrointestinal cancer?

Can a CT scan detect gastrointestinal cancer?

Yes: Absolutely. Also an MRI with diffusion weighted imaging. Look it up. ...Read more

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Can a CT scan detect pregnancy when having a CT scan for appendix? How early cam it detect a pregnancy ?

Can a CT scan detect pregnancy when having a CT scan for appendix? How early cam it detect a pregnancy ?

Shouldn't be used: Nearly all facilities will test for pregnancy with a blood test prior to performing a ct scan on a women of childbearing age due to potentially harmful radiation effects to a developing embryo or fetus. Whether they told you or not they probably checked at the time you were evaluated for appendicitis. It is rare to see a fetus on a ct scan because of this, but sometimes is seen in emergency scan. ...Read more

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How do a CT scan and a MRI differ?

How do a CT scan and a MRI differ?

Imaging tests: Ct uses radiation, like multiple x-rays. Mri uses magnets, and is very useful in characterizing soft tissue differences such as in the brain or joints, but also is more expensive and takes much more time. ...Read more

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Can a non contrast head CT scan miss anything?

Can a non contrast head CT scan miss anything?

Yes: A ct scan with IV contrast will be more sensitive for detecting lesions than a non-contrast ct, and an MRI with contrast is even better than a ct scan. ...Read more

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What can an MRI show that a CT can't?

What can an MRI show that a CT can't?

It depends: Both are very good at imaging various parts of the body. Depending on the body part and the question being asked, ct or MRI may be better. In general, MRI can "see" the soft tissues a little better (e.g., brain and spinal cord, rotator cuff) and ct is sometimes better for looking at the bones (e.g., facial fractures, sinuses). Doctors work closely with radiologists to determine the best test. ...Read more

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Is a CT scan a reliable test to detect bone cancer?

Is a CT scan a reliable test to detect bone cancer?

It is one option: Bone Cancer can be imaged with Bone scans, X-rays, CT scan and MRI scans. A good oncologist or radiologist can help to choose the more most appropriate imaging test/s ...Read more

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What can a mra detect that a brain MRI cannot detect?

What can a mra detect that a brain MRI cannot detect?

MRA shows arteries: Mr angiography (mra) is an MRI which uses special sequences/techniques to highlight the arteries in the area scanned to look for abnormalities such as aneurysms. Like any test, it is not 100% accurate, but performed correctly and interpreted by a qualified radiologist, it is a great test to screen for arterial abnormalities. ...Read more

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Can a CT scan detect a brain tumer? Can u have normal scan but have one?

Can a CT scan detect a brain tumer? Can u have normal scan but have one?

Yes: It can detect a brain tumor, but will be better able to detect a tumor if it performed with IV contrast. Mri with contrast can detect very small tumors that may not be seen with a ct scan. However, it is very uncommon for a 28 yr old to have a brain tumor- not impossible- just uncommon. ...Read more

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Is it possible for MRI or CT scan to detect brain cancer?

Is it possible for MRI or CT scan to detect brain cancer?

Yes: A CT scan can detect a brain tumor, but will be better able to detect a tumor if it performed with IV contrast. Mri with contrast can detect very small tumors that may not be seen with a ct scan. ...Read more

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Can a CT and MRI without contrast detect a pituitary tumour?

Yes it could: Ct is more dependent on contrast. But MRI has two phases(t1and t2) which can serve like a contrast and the tumors often show up better in t2 weighted images. ...Read more

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Dr. Michael Gabor
1,917 doctors shared insights

Ct Scan (Definition)

Computed tomography (ct scan) or computed axial tomography (cat scan), is a medical imaging procedure that utilizes computer-processed x-rays to produce tomographic images or 'slices' of specific ...Read more