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CT Scanning
Also known as a "CAT" scan, the CT scan is a Computerized Axial Tomography scan that allows doctors to analyze organs and bones for diseases.
731 Questions
How much should you prepare to pay CT scan for lungs?
Its depend from hospital to hospital, 3000-7000 INR.
Why would the doctor order a brain scan?
There are several different reasons why one would be referred for a brain scan. Some examples include to clarify or rule out the presence of a brain tumor.
A PET scan is a scan of the brain to see what's going on inside. It is used for cancer patients to find out exactly where the tumor is and make surgery easier.
The CAT scan is computerized axial tomography. The words "axialized" and "tomographic" might be substituted in. A link can be found below. Oh, and we're moving away from that term now. It's just called a CT scan by many currently, and that's short for computerized tomography, as you probably guessed. A "Computerized Axial Tomographic" scan is a type of X-ray scan that is utilised for diagnostic purposes in a variety of health issues.
What can you eat before a pet scan?
It depends on what part of the body is being scanned and why the scan is necessary. You should ask your doctor or radiologist. If you can't reach them your best bet is not to eat.
Why is a biopsy given after a pet scan?
A PET scan can reveal the presence of a mass, but it is also good to have a sample of cells from the suspected area to look for changes in the nucleus to ascertain whether pre-cancerous changes are taking place. Hence, the biopsy under CT guidance.
What is a non-contrast CT scan?
There are two types of contrast used in CT, oral and IV. The oral contrast is usually a thin barium sulfate suspension and is used to distend and coat the stomach and intestines. IV contrast is usually a nonionic iodinated liquid injected into your arm. This highlights anatomy with blood flow. A noncontrast ct scan usually refers to NOT using the IV contrast, oral may still be used.
they are doing cp scan on me. i would like to know what it is, and what they are checking for.
What is the reaseon for a cat scan of the pancreas?
There are many things that could show up on it. They could be looking for pancreatitis ( an inflamatory disease in the pancreas) or cysts (fluid) or a cancer. It is important to follow up quickly on it.
The new CT scanners move the patient while the picture is being made. The pitch is a ratio of the speed of movement to the rotation of the machine around the patient. (the rotation of the machine is inside the cover and only seen thru the small openings). A higher pitch gives a faster scan but the images may be less detailed. A lower pitch gives a more detailed image but takes longer to acquire. This is all figured by the technologist to acquire the best image for the test being performed.
What does a grossly remarkable bladder scan mean?
I think you read the result incorrectly. "Grossly remarkable" doesn't make sense. "Grossly unremarkable" means there was no obvious abnormality.
How much will it cost for your CAT Scan?
The machines can be purchased used for as little as $20,000 or new for millions. The test costs as low as $1500 up to $10,000 depending on how much of the body is scanned and if there is any special processing afterwards.
A dual energy computed tomography (DECT) scan is a computerized X-Ray with two X-Ray beams (instead of one beam standardly used in regular CT scans). This tool can be used to produce 3-D images that use color coding to differentiate between different materials in the body. Each of the two beams is set to a different "energy" (like a wave frequency).
The idea is that different materials in the body (such as calcium, uric acid, soft tissue, etc) all absorb radiation to varying degrees at the two frequencies. Thus, depending on the degree of radiation absorbed by a particular tissue, the scanner can identify what the tissue is comprised of. The computer can then code different tissues with different colors, so that it is easy to see what a region is comprised of at a glance.
What is the duration of a CT scan?
The procedure time will vary in length depending on the area being imaged. Average study times are from 30 to 60 minutes
A computed tomography (CT) scan of the sinus is an imaging test that uses x-rays to create detailed pictures of the air-filled spaces inside the face (sinuses).
Alternative NamesCAT scan - sinus; Computed axial tomography scan - sinus; Computed tomography scan - sinus; CT scan - sinus
How the test is performedYou will be asked to lie on a narrow table that slides into the center of the CT scanner. You may lie on your back, or you may lie face-down with your chin raised.
Once you are inside the scanner, the machine's x-ray beam rotates around you. (Modern "spiral" scanners can perform the exam without stopping.)
A computer creates separate images of the body area, called slices. These images can be stored, viewed on a monitor, or printed on film. Three-dimensional models of the body area can be created by stacking the slices together.
You must be still during the exam, because movement causes blurred images. You may be told to hold your breath for short periods of time. Straps and pillows may be used to keep you still during the procedure.
The actual scan should take about 5 minutes. The entire process should take 15 minutes.
How to prepare for the testCertain exams require a special dye, called contrast, to be delivered into the body before the test starts. Contrast helps certain areas show up better on the x-rays.
- Contrast can be given through a vein (IV) in your hand or forearm. If contrast is used, you may also be asked not to eat or drink anything for 4-6 hours before the test.
- Let your doctor know if you have ever had a reaction to contrast. You may need to take medications before the test in order to safely receive this substance.
- Before receiving the contrast, tell your health care provider if you take the diabetes medication metformin (Glucophage) because you may need to take extra precautions.
If you weigh more than 300 pounds, find out if the CT machine has a weight limit. Too much weight can cause damage to the scanner's working parts.
You will be asked to remove jewelry and wear a hospital gown during the study.
How the test will feelSome people may have discomfort from lying on the hard table.
Contrast given through an IV may cause a slight burning sensation, a metallic taste in the mouth, and a warm flushing of the body. These sensations are normal and usually go away within a few seconds.
Why the test is performedCT rapidly creates detailed pictures of the sinuses. The test may diagnose or detect:
- Birth defects in the sinuses
- Infection in the bones of the sinuses (osteomyelitis)
- Injury to the face over the sinuses
- Masses and tumors, including cancer
- Nasal polyps
- The cause of repeated bloody noses (epistaxis)
- Sinus infection or sinusitis or a sinus infection
This results from this test may also help your health care provider plan for sinus surgery.
Normal ValuesResults are considered normal if the sinuses are normal in appearance.
What abnormal results meanAbnormal results may be due to:
- Birth defects
- Bone fractures
- Cancer
- Polyps in the sinuses
- Sinus infection (sinusitis)
Risks of CT scans include:
- Being exposed to radiation
- Allergic reaction to contrast dye
CT scans do expose you to more radiation than regular x-rays. Having many x-rays or CT scans over time may increase your risk for cancer. However, the risk from any one scan is small. You and your doctor should weigh this risk against the benefits of getting a correct diagnosis for a medical problem.
Some people have allergies to contrast dye. Let your doctor know if you have ever had an allergic reaction to injected contrast dye.
- The most common type of contrast given into a vein contains iodine. If a person with an iodine allergy is given this type of contrast, nausea or vomiting,sneezing, itching,or hives may occur.
- If you absolutely must be given such contrast, your doctor may give you antihistamines (such as Benadryl) or steroids before the test.
- The kidneys help remove iodine out of the body. Those with kidney disease or diabetes may need to receive extra fluids after the test to help flush the iodine out of the body.
Rarely, the dye may cause a life-threatening allergic response called anaphylaxis. If you have any trouble breathing during the test, you should notify the scanner operator immediately. Scanners come with an intercom and speakers, so the operator can hear you at all times.
ReferencesAygun N, Zinreich SJ. Radiology of the nasal cavity and paranasal sinuses. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, Pa: Mosby Elsevier; 2010:chap 44.
Grainger RG, Thomsen HS, Morcos SK, Koh D, Roditi G. Intravascular contrast media for radiology, CT, and MRI. In: Adam A, Dixon AK, eds. Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 2.
Shaw AS, Dixon AK. Multidetector computed tomography. In: Adam A, Dixon AK, eds. Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging. 5th ed. New York, NY: Churchill Livingstone; 2008:chap 4.
Reviewed ByReview Date: 01/31/2011
Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Jason Levy, MD, Northside Radiology Associates, Atlanta, Georgia. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
What does hypodensity on ct scan indicate?
Hypodensity indicates a decrease in density. Hypodensity on a CT scan can indicate damaged tissue, from trauma, illness, or birth defect.
Difference between a cat scan and a xray?
An X-Ray is a type of radiation. The equipment used by the X-Ray technician can pick up images of dense objects that will appear white on the X-Ray film. X-Ray is mostly used to assess and diagnose bone degeneration, disease, dislocations, fractures, infections and/or tumors.
While CT Scans create more detailed images of the inside of the patient's body than X-Ray. It take 360- degree photographs of internal human's organs.
How should I prepare for a CT scan?
If a contrast medium must be administered,the patient may be asked to fast from about four to six hours prior to the procedure.Pregnant women or those who could possibly be pregnant should not have a CT scan unless the diagnostic benefits outweigh.risks
Do CT scans provide a much higher resolution of anatomical detail than do MRI scans?
As we know,Clarity of the image is decided by its Spatial Resolution but not by Pixel Resolution.
CT have high Spatial Resolution but MRI have comparable Spatial Resolution to CT&far better Contrast Resolution than CT-So,MRI is the BEST to demonstrate Anatomy,especially in parts containing more soft tissue[Eg:Brain]&CT is the BEST to demonstrate Bony Anatomy.
Why is fasting before a cat scan necessary?
Its not safe because something might go wrong in the scan and the antibiotic/sleeping injection might react with food and it won't show a clear and good picture of your cat's insides. -------------------------------------------------Improvement By the wording of the question, 'cat' scan may actually refer to CT scan or Computed (Axial) Tomography scan. Fasting before the scan for 4 to 6 hours or more may be required for certain scans requiring contrast media (iodine-based dyes to visualize certain organs better) or scans of the abdomen to avoid compounding results since certain food items may mimic human tissue in its response to X rays or reduce the effectiveness of contrast provided by contrast media.
