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What Are Disadvantages Of A Ct Scan For Brain
Very safe in general: A plain ct scan really only caries the risk of a fairly modest radiation exposure, so we typically only start to worry about this for people who get many cts in a single year. If it is being done with intravenous contrast, then there is a risk of allergic reaction to the iodine, as well as some risk of kidney damage in those with underlying kidney risk factors (eg elderly, diabetes). ...Read moreSee 1 more doctor answer
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
Risk vs Benefit: The main risk is that a small amount of radiation is used during the procedure which can slightly increase the risk of developing cancer in the future. The real question is why is the CT being ordered? If the benefit of diagnosing a problem with CT is greater than the miniscule risk of developing cancer in the future, get the CT. Remember there is also a risk of missing a disease without the CT ...Read more
Fast and inexpensive: A ct of the head is extremely quick (less than a minute) and can rule out fracture, bleeding, and many other serious conditions. It is not as sensitive to pathology as an MRI (especially in the soft tissue), and does involve exposure to x-rays. ...Read moreSee 1 more doctor answer
They are: different tests that create images based on different technologies, so which one is best depends on what exactly your doctor is looking for. For certain indications, either one or the other might be preferred. Sometimes, both may be necessary. ...Read more
What are the primary differences in a CT scan of heart and a nuclear stress test? Would one make more sense looking for blockages?
CARDIAC IMAGING: A CT reveals anatomy with some limitation if heavy calcium is present & scanner technology dependent,A nuclear stress depends on the isotope (TCc vs Thallium vs one of the PET agents) reveals detailed information on function,often the 2 modalities are complementary and necessary for appropriate diagnosis and treatment/prognostication ...Read more
Tricky: Not all cancers are hypermetabolic on pet scans and not all hypermetabolic activity in a pet scan is cancer. Inflammation/infection can also show hypermetabolic activity. Pet scans are performed in conjugation with ct (pet/ct) and though pet is great for detecting metabolism (high sensitivity), its specificity is not as great and also has poor anatomic resolution. Reading a pet requires care/skil. ...Read moreSee 2 more doctor answers
It combines: the high sensitivity of PET with the high level of anatomic detail of CT, so an abnormality on PET can be accurately localized. ...Read more
Are there different types of CT scans to clearly identify cervical stenosis? Just like there is a 32 slice MRI (extremely effective) vs. Just an mri?
Minimal: A cat scan is a fairly safe procedure. A single exam to a part of a body does not have significant risk as far as radiation exposure. An exam using IV contrast has a slight risk for contrast reaction. Serious reactions are quite rare. If you have a significant allergic history(significant allergic response to multiple things) your risk is slightly greater. ...Read moreSee 1 more doctor answer
Iv contrast +/- oral: After taking the contrast, taking the images does not take long. The IV contrast has potential 2 problems. You may be allergic to it like any medicine and it may slow down the kidneys if they are not working near full capacity. Your doc can tell the risk based on blood tests of kidney function. ...Read moreSee 1 more doctor answer
Why would a hospital do a second CT scan following a spinal tap? Are CT scans always of the brain?
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- What are the advantages or disadvantages of a ct scan of the head?
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