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Doctor insights on: Ct Scan Vs X Ray Pneumonia

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March 4 lower left pneumonia. X-ray yesterday white lower left lung still. Ct scan today showed small atelectasis or small fluid lower left. Resolve?

March 4 lower left pneumonia. X-ray  yesterday white lower left lung still. Ct scan today showed small atelectasis or small fluid lower left. Resolve?

Likely ok: Radiographic resolution of pneumonia is typically slower than (lags behind) clinical resolution. What does the report impression say? ...Read more

Dr. James Dukelow
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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Does pneumonia always show up on a cat scan and an X-ray ?

Does pneumonia always show up on a cat scan and an X-ray ?

Just about always: The short answer is yes. Only in very rare circumstances will a pneumonia be invisible on both xray and CT scan. ...Read more

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Caught pneumonia from my girlfriend, xray showing hilar lymphadeonpathy rightside. Could this swelling be from the pneumonia? Going for CT scan

Caught pneumonia from my girlfriend, xray showing hilar  lymphadeonpathy rightside. Could this swelling be from the pneumonia? Going for CT scan

Yes: Hilar lymphadenopathy is not uncommonly seen in association with pneumonia, especially if accompanied by fluid (effusion). Typically, the enlarged nodes are less that 2cm in diameter. Larger nodes always raise concern for neoplasm. ...Read more

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My chest xray and CT scan show groundglass opitcity and perihilar infiltrates. I an 91. What is this. I am told it is not pneumonia. Thank You?

My  chest xray and CT scan show groundglass opitcity and perihilar infiltrates.  I an 91. What is this. I am told it is not  pneumonia. Thank You?

Abnormal CT findings: Abnormal CT/x-ray findings frequently are meaningless in absence of a patient's history,& so it is not possible to answer the question directly; there may be many possible causes of such findings.One non-pneumonia cause of CT findings of groundglass opacities & perihilar infiltrates can happen to asthmatics; it is allergic bronchopulmonary aspergillosis (an allergic response to an airborne fungus) ...Read more

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Pneumonia lower left, fluid right March 4. Xray tues show left white and right. Ct scan wed showed left clear right pleural effusion & atelectasis. ?

Pneumonia lower left, fluid right March 4. Xray tues show left white and right. Ct scan wed showed left clear right pleural effusion & atelectasis. ?

Here are some ...: For an average 34-y-o female, you seemed getting a lot of radiation more than the necessity which most likely could be taken care of by good Hx + physical exam + effective counseling + collaborative F/U. Nonetheless, work closely with Doc. Besides, today's medical care has been under high pressure of political correctness, consumerism, & commercialism. Keeping these in mind will help the future. ...Read more

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I was diagnosed with pneumonia 3 wks ago. Tightness in my chest has not gotten better.xray,ct scan,vitals and EKG all looked good.What could be wrong?

I was diagnosed with pneumonia 3 wks ago. Tightness in my chest has not gotten better.xray,ct scan,vitals and EKG all looked good.What could be wrong?

Takes time: It's understandable that you are impatiently waiting to get well but healing takes time. Has your cough improved? Do you have fever? Is your sputum lighter and less? If the answer is yes, you're slowly getting better. O/W, ask your doc for reevaluation. ...Read more

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What's the risk for fetus after I am doing X-ray and CT scan?

Unclear: There are multiple variables in determining the risk to fetus. The risk depends on the age of the fetus. The fetus is most suspective to damage in the first trimester. X-rays and ct exams taken far away from the wombs such as the head or extremities actually provide little to no radiation to the fetus. It is common procedure to cover the womb with lead if there is any chance of pregnancy. ...Read more

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Possible for a 6.6mm tumor to not show up on X-ray or CT scan?

Possible for a 6.6mm tumor to not show up on X-ray or CT scan?

A cm is: Roughly a half-inch, so 6.6 is a little more than half that and quite easy to not been seen on ct, and unlikely to be seen on a plain film...And I am speaking of chest. Abdomen or pelvis even easier to miss. ...Read more

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Please tell me the difference among x-ray, CT scan and mri?

The short story...: Xrays are images obtained by passing a beam through a detector to simply generate and image of which xrays did or didn't hit the detector. Ct uses the same technology but reconstructs multiple imaging points using a computational algorthim to make a much more detailed picture in the form of "slices" mri uses magnetic fields and radio waves to generate and image using computers to create images. ...Read more

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Can having a CT scan 4 days after having an X-ray increase your chance for cancer?

Can having a CT scan 4 days after having an X-ray increase your chance for cancer?

See below: All x-ray exposure increases your chances of developing cancer.For any test involving radiation exposure, the question is one of risk vs benefit. If there's a compelling reason/question that's prompting the scan then it's likely worth proceeding but no one should be getting scans without a good reason. If you are unclear on your doctor's thinking, ask. Then you can decide if you want the scan done. ...Read more

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How is slipped rib/:floating rib syndrome diagnosed? Does it show up on X-ray or CT scan?

History and exam: Everyone generally has at least one floating ribs some have a couple on each side though usually the lower ribs. They can get irritated on your hip or on the ledge of a couch when you're leaning or a variety of other things. They are slow to heal. Sometimes you can feel them slip underneath another rib. That is uncomfortable. There's a lot of carlatun these ribs which is slow to heal. Even chest x-rays are not very helpful. Sometimes diagnostic nerve block can define things. ...Read more

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Is it possible have something missed on an x-ray, mri, CT scan etc?

Missed Diagnosis: Yes, it is possible that a diagnosis was missed on your x-ray, ct or mri. Radiologists are just like all other humans and can, unfortunately, occasionally make mistakes. If there is concern, consider asking your doctor to discuss the examination personally with the radiologist who interpreted the exam and then to discuss those results with you. ...Read more

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What to do if I have something missed on an x-ray, mri, CT scan etc?

What to do if I have something missed on an x-ray, mri, CT scan etc?

Inform physician: Radiologists trained in imaging from residencies and fellowships usually read imaging studies. They are usually peer reviewed to avoid making errors. However they are human and can make errors.Error rate is usually universally about 3-4%. In order to improve performance of medicine providers need to be informed. In imaging as in medicine there are gray areas and everything is not black and white. ...Read more

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My X-ray showed I had a new mild posterior left lower lobe infiltrate and I wanted to know what that means and now they doings a CT scan? y is that

Better evaluation: Infiltrate basically means stuff in alveoli causing shadow on xray; findings like "infiltrate" or "opacity" on xray are most often not specific and may represent different things such as infection/pneumonia, aspiration of mucus, or mild collapse of known as atelectasis. CT can help to try an differentiate these, and also identifies any associated findings like mucus in bronchi or pleural effusion ...Read more

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Ct scan showed lower atelectasis and swelling around appendix. No one mentioned the atelectasis. Have seen it on past X-ray. Never mentioned to me why?

Ct scan showed lower atelectasis and swelling around appendix. No one mentioned the atelectasis. Have seen it on past X-ray. Never mentioned to me why?

If it was a very: small region of Atelectasis or scarring it may not have been felt to be clinically significant, but without seeing the images it is impossible to say for sure. You can ask your doctor about it if you are concerned. ...Read more

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Whats the difference between an chest X-ray and CT scan?

Whats the difference between an chest X-ray and CT scan?

Both use x-rays: A chest ct is a very detailed look at the lung, blood vessels, heart and bony thorax. It takes very thin (3-5mm) slices which allows for detailed analysis of lung structure. The chest x-ray takes a 3-d structure and collapses it to 2-d. This still provides very detailed information of the chest, but can lead to overlap -- sometimes requiring additional views or a ct scan to clear things up. ...Read more

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Do nuclear scans expose a patient to more radiation than an X-ray or CT scan?

Not usually: Depends on nuclear study. A lot of CT exams such as chest and abdomen have more radiation dose than most nuclear medicine studies. A bone scan is more dose than the CT of brain. In any event if study is necessary for diagnosis to help patient the dose becomes insignificant. ...Read more

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Dr. Michael Gabor
1,850 doctors shared insights

Ct Scan (Definition)

Ct scan uses data from a beam of xrays and reconstructs a cross sectional image of your body. It is a high dose of xrays and used only when the benefits outweigh the risk. Cancer risk is 1 in 500 in children. Also using iodinated contrast might cause transient renal failure in about 5% of patients. (contrast induced nepropathy) most do not explain this to the patient as ...Read more


Dr. Michael DePietro
2,212 doctors shared insights

Pneumonia (Definition)

An inflammation of the lungs, most ...Read more