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Doctor insights on: Ct Chest Non Contrast

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When doing CT of chest what's the difference with and without contrast?

When doing CT of chest what's the difference with and without contrast?

See below: No contrast shows you the lung fields. Contrast enables you to see blood clots in the pulmonary vessels as well as differentiate between lymph nodes and vessels in the mediastinum, overall a better study if you can tolerate it (allergies, renal function). ...Read more

Dr. Tiffanie Noonan
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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What can be seen on a CT chest angiogram with contrast versus one without contrast? Does the one with contrast show more or just different things?

What can be seen on a CT chest angiogram with contrast versus one without contrast? Does the one with contrast show more or just different things?

Contrast or not: Many blood vessels run through parts of the chest. Without contrast one can not see vessels, where they go, if they are narrowed, etc. Contrast during the ct can dramatically increase the usefulness of the information provided my the scan. ...Read more

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Would a CT of the chest with contrast see asd? Septal defect?

Would a CT of the chest with contrast see asd? Septal defect?

Usually not: But it can show some indirect evidence. You might want to get 2 d echo or trans-oesophgeal echo is you have a suspicion of asd. ...Read more

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I was wondering is a CT angiogram of the chest the same as CT chest with contrast?

I was wondering is a CT angiogram of the chest the same as CT chest with contrast?

CT techniques: They are similar in many ways. However, the timing of the contrast for CT angiogram is different to allow for better visualization of the blood vessels in the chest. ...Read more

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What are the symptoms or allergic reaction or risks from using iodinated intravenous contrast during CT chest scan.

What are the symptoms or allergic reaction or risks from using iodinated intravenous contrast during CT chest scan.

Adverse Reactions...: Adverse reactions to iodinated intravenous contrast agents range from a mild inconvenience, such as rash and itching associated with hives, to a rare anaphylactic reaction (life-threatening emergency). Renal toxicity is also a known adverse reaction associated with IV contrast mostly in patients with renal insufficiency. Prior allergic reactions to contrast, asthma, and allergies are factors assoc. ...Read more

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I had a CT angiogram of chest with contrast and now my dr wants me to have one without contrast. I thought with contrast was always better?

I had a CT angiogram of chest with contrast and now my dr wants me to have one without contrast. I thought with contrast was always better?

With and without: Calcium looks just like contrast on a ct scan. Doing a study with and without will let you see what was simply calcium and what could be blood flow (contrast is in the blood stream so represents blood flow). It can be very important to differentiate between the two. ...Read more

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If I had a Ct scan of chest and it said no plaque or calcium build up. does that mean my pipes are good? Ct with contrast of chest Would that see block

If I had a Ct scan of chest and it said no plaque or calcium build up. does that mean my pipes are good? Ct with contrast of chest Would that see block

If you had a CT: Calcium scoring scan, it means you have a probability of atherosclerotic coronary artery disease near zero. This type of scan doesn't evaluate coronary artery anatomy, nor can it detect non calcified "soft" plaque. That type of CT requires contrast injection. If you just had a routine chest CT, it wouldn't be that sensitive for detecting early coronary artery disease. ...Read more

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Do atelectasis & pneumonia look similar on non contrast chest CT scan?

Do atelectasis & pneumonia look similar on non contrast chest CT scan?

Can be similar: On non contrast CT scan it is difficult to differentiate in some cases atelectasis from pneumonia. With contrast administration usually atelectasis is more contrasted (enhanced) than most pneumonias. ...Read more

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56/m (ex-smoker) - Can non contrast chest CT scan detect endobronchial tumors (tumors in bronchi & bronchioles)?

56/m (ex-smoker) - Can non contrast chest CT scan detect endobronchial tumors (tumors in bronchi & bronchioles)?

Tumors: Large endobronchial lesions or tumors can sometimes be seen if they are located in the large central airways.
Bronchoscope is the test of choice to evaluate the airways ...Read more

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It is possible for a patient in a modern hospital to have a CT of the Brain (Non-contrast) & a Chest x-ray only 3 minutes later? This seems very fast.

Yes; Radiology Dept.: Modern hospitals have all the Radiology equipment concentrated in 1 department. If the doctor orders a battery of tests, it is possible to have the patient transported from the CT scanner to an X-ray room next door. Also, if they are prepared, the X-ray can be taken as soon as they arrive. Portable X-ray equipment can also be used in the waiting area, though the quality is worse. HealthTap Prime. ...Read more

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How likely is a non-contrast High-Resolution CT of the entire chest (not selective thin slices at random regions) to miss lung cancer When symptoms (e.g. shortness of breath, cough) are present?

How likely is a non-contrast High-Resolution CT of the entire chest (not selective thin slices at random regions) to miss lung cancer When symptoms (e.g. shortness of breath, cough) are present?

Not likely: A CT of the chest without contrast is a good test to catch cancer. While it is possible that a CT could miss a small cancer or one that is hidden by another process, a cancer that size would not be likely to cause symptoms of shortness of breath. Noncontrast CT is the preferred imaging study for lung cancer screening. ...Read more

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Can CT of chest with contrast see trachea or windpipe?

Yes: Ct of the chest (with or without contrast) will show the trachea and bronchi well. ...Read more

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If you have URI or cold symptoms, would it interfere with the CT chest scan with contrast images or results.?

If you have URI or cold symptoms, would it interfere with the CT chest scan with contrast images or results.?

It could: With a viral bronchitis there is inflammation in the lungs so a ct of chest done when ill may look worse than normal. If it is to follow a mass then probably less important. Suggest speaking to radiologist to see if waiting until cold passes is advised so that you get the most accurate study possible. ...Read more

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Can COPD be seen on CT chest without contrast? If so, would the radiologist have put it on the impression/findings?

Can COPD be seen on CT chest without contrast? If so, would the radiologist have put it on the impression/findings?

Not always: If it is emphysema then you see damaged lung but someone can have significant. COPD without evidence on cy. ...Read more

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Hi, I had a ct of my chest with and without contrast my results only showed asymmetric breast densities, greater on the left and im a male is this bad?

Hi, I had a ct of my chest with and without contrast my results only showed asymmetric breast densities, greater on the left and im a male is this bad?

Could just be skin: Fold shadows on the CT, though CTs are pretty sensitive to densities that can be differentiated. I would have a professional clinician examine you to see if there is breast tissue or augmentation going on... Though whether it is bad depends on what that clinician found... ...Read more

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Can chest CT with contrast rule out trachea cancer?

Can chest CT with contrast rule out trachea cancer?

Possibly: The cancer would have to be a certain size to be visible. So if it were large enough to be seen, then the diagnosis could be made. Not visible may mean it is too small to be seen with ct. ...Read more

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What does a chest CT with contrast tell a doctor? Results were normal.

What does a chest CT with contrast tell a doctor?  Results were normal.

A few things: A chest ct with contrast is often used to evaluate for lung cancer or a clot in certain arteries (pulmonary embolism). There are other uses as well. ...Read more

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Do chest CT scans w/contrast include evaluation of the clavicle and shoulder? What about chest xrays?

Do chest CT scans w/contrast include evaluation of the clavicle and shoulder? What about chest xrays?

Yes&No: Some clavicle can be seen. The shoulder, not too much. CXR does see both, but is a 2Dimensional image and therefore don't see other views of the shoulder. ...Read more

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I had a CT of chest with contrast done. Incidentally, they found gallstones. But I'm asymptomatic. What should I do?

I had a CT of chest with contrast done.  Incidentally, they found gallstones.  But I'm asymptomatic.  What should I do?

Gall stones: As long as you are asymptomatic you can be followed by your doctor.he may want to reduce fat and cholesterol in your diet and possibly start you on statins ...Read more

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Can CT scan of chest with contrast at the 30yr age gives cancer after 10 years. What I can do to prevent it. I have never smoked. Healthy vegetarian.

Can CT scan of chest with contrast at the 30yr age gives cancer after 10 years. What I can do to prevent it. I have never smoked. Healthy vegetarian.

If your question is:: Can one ct scan done at age 30 cause cancer? The answer is no, it should not. Unfortunately, you cannot completely eliminate the risk for all cancers, just reduce it. It seems you are very health conscious, congratulations. Keep it that way but don't let anxiety grab hold of you. You can't live in fear. ...Read more

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Ct chest no contrast says hyperinflation. Dr says CT was normal & long torso is the reason lungs look big. Would air trapping & bullous show up in ct?

Ct chest no contrast says hyperinflation. Dr says CT was normal & long torso is the reason lungs look big. Would air trapping & bullous show up in ct?

Yes: Air trapping and bullae can be seen on the ct scan. Pfts can also detect air trapping with the special test where they place you in a box and make you breathe through the mouth piece. ...Read more

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Axial CT images of the chest were obtained after the administration of intravenous contrast. Mediastinal and lung windows were generated as well as a?

Axial CT images of the chest were obtained after the administration of intravenous contrast. Mediastinal and lung windows were generated as well as a?

Need more info: You are describing how the chest ct was obtained and presented to the radiologist for interpretation. Different windows are settings on the computer to allow assessment of different types of tissue based on the tissue density. What is your question? ...Read more

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I've had 3 CT scans, full body with contrast and well over 25 chest x rays. And a hida scan. I'm only 18. What are the chances that it causes me to get cancer?

I've had 3 CT scans, full body with contrast and well over 25 chest x rays. And a hida scan. I'm only 18. What are the chances that it causes me to get cancer?

Hard to say.: The answer is you have a greater risk of getting a cancer at some point in your life based on the whole body radiation exposure than you would have without that exposure but the actual risk is probably less than you fear. The studies on radiation exposure and cancer risk suggest a small increase in incidence with increasing dose. Your goal should be to minimize future radiation exposure. ...Read more

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Can a patient have pericarditis and have a normal chest CT with contrast as well as a normal echo?

Yes - no effusion.: Pericarditis, or "inflammation of the lining of the heart" is a clinical or histologic (microscopic) finding, not (of itself) a (gross) anatomic finding. So, you can irritate the lining without being able to see it- by drugs, viruses, etc. Only if there is a pericardial effusion (fluid from the inflammation build up around the heart) will you see something on CT or echocardiogram. TTYD. ...Read more

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Do supraclavicular nodes right and left, show up on chest xray if they were in the 2 CM range?do they show up easily on CT with contrast or U/S?

Do supraclavicular nodes right and left, show up on chest xray if they were in the 2 CM range?do they show up easily on CT with contrast or U/S?

Imaging: Supraclavicular lymph nodes might be difficult to see on a chest x-ray. You should be able to see them on a CT of the chest. An ultrasound would be able to see them one at a time, but generally isn't used for monitoring because it doesn't give a good view of the surrounding tissues and especially the deeper structures. I hope this helps. ...Read more

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Can CT of chest with contrast rule out lung cancer?

Can CT of chest with contrast rule out lung cancer?

Not completely: If there is a suspicious density in the lung, definitive way to rule out if it is due to malignancy, or to detect its nature of it, is by biopsy only. And tissue examination (pathological examination). ...Read more

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Would you see an enlarged right heart on a chest CT scan without contrast and CT scan x-ray?

Would you see an enlarged right heart on a chest CT scan without contrast and CT scan x-ray?

Yes if greatly enlar: An enlarged heart can be seen on X-ray or CT scan especially if it is greatly enlarged. However, the cause for the enlargement is usually not apparent by those means. An echocardiogram (ultrasound) usually does a better job. Sometimes more specialized tests are needed. However, if this is the 1st time that an enlarged heart was detected, it is best to get it confirmed & identify the cause. GL & TY ...Read more

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Have a cold, having a chest CT scan without contrast on my lungs for previous breathing issues. Still ok to do?

Have a cold, having a chest CT scan without contrast on my lungs for previous breathing issues. Still ok to do?

Need more info: You might have COPD. Do you smoke? STOP IF YOU DO!! Are you seeing a pulmonologist. If not that is what I would suggest considering what you mention as "previous breathing issues". ...Read more