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Doctor insights on: Digital Subtraction Angiography

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What is digital subtraction arthrography?

What is digital subtraction arthrography?

Specific xray series: Digital subtraction arthography is a special radiographic technique in which the black and white sequence is reversed on the image. It is used to as an additional technique to allow the radiologist to assess different body parts, including the joints and blood vessels. ...Read more

Dr. John Landi
3 doctors shared insights

Angiography (Definition)

encompasses several medical imaging tests that visualize the anatomy and pathology of blood vessels. Standard angiography involves catheterizing a vessel and injecting contrast under X-ray visualization. Less invasive angiographic techniques include MR angiography ...Read more


Dr. Timothy Wu Dr. Wu
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Carotid mra vs carotid doppler ultrasound better predictor?

Dr. Timothy Wu Dr. Wu
1 doctor agreed:
Carotid mra vs carotid doppler ultrasound better predictor?

Doppler Ultrasound: Ultrasound has proven to be cost-effective and quite accurate in determining the degree of narrowing in the carotid artery. Many vascular surgeons, including myself, solely rely on it to decide whether someone needs an operation. Mra is not so good and over-estimates the actual degree of narrowing. I would not rely on its findings to decide on operating. As mentioned a cta is much better. ...Read more

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Carotid doppler showed 50% bilateral blockage, mr angiogram was negative. Which is more accurate?

Carotid doppler showed 50% bilateral blockage, mr angiogram was negative. Which is more accurate?

Debatable: Few vascular surgeons make decisions on carotid artery stenosis based on mr, as carotid doppler (ultrasound) has been proven to be very reliable when a good technologist performs the study. From what you're describing, your carotid arteries are likely without disease as the reporting standards for ultrasound haven't quite been set. In my lab you'd likely be found to have no disease at all. ...Read more

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Could computed tomography angiography show heart problems?

Could computed tomography angiography show heart problems?

CTA: Cardiac computed tomographic angiograpy is performed to try and diagnose cardiac anatomy and pathology. It doesn't diagnose everything but can provide very useful information that often yield a diagnosis if the study is ordered appropriately. ...Read more

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Is computed tomography angiogram cta a very common procedure?

Is computed tomography angiogram cta a very common procedure?

CT angiogram: It is being done much more often when it is necessary to visualize blood vessels (for example to see if there's a blockage). There is some radiation involved but it is considered much less "invasive" and has less complications than the regular type of "angiogram", where blood vessels are visualized by inserting thin tubes called catheters directly into them to inject a dye. ...Read more

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Is coronary CT angiogram more reliable than invasive coronary angiogram?

Is coronary CT angiogram more reliable than invasive coronary angiogram?

No : Each of these tests has its advantages and disadvantages. But coronary angiogram (cardiac cath) is still the most reliable way to look at coronary arteries. ...Read more

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Can computed tomography angiography show heart problems right?

Can computed tomography angiography show heart problems right?

It depends: On regular contrast-enhanced ct exams, cardiac abnormalities including masses or thrombus can be detected, but little information regarding the coronary arteries can be obtained. On a dedicated coronary ct exam with contrast (ekg gated), the coronary arteries can be evaluated for narrowing or blockages. This is usually not possible on regular ct exams due to motion. ...Read more

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Is magnetic resonance venography without contrast as accurate as mrv w/ contrast? Is mrv good accurate for distal clots?

Is magnetic resonance venography without contrast as accurate as mrv w/ contrast? Is mrv good accurate for distal clots?

MRV advantages: "Contrast media-enhanced MRV, however, is more reproducible and less susceptible to artifacts." "...MRV to have both high sensitivity (range, 87.5%–94.5%; pooled sensitivity, 92%) and specificity (range, 92.6%–96.5%; pooled sensitivity, 95%)" http://www.guideline.gov/content.aspx?id=47686 Advantages: deep calf, abdominal, and pelvic vein imaging. can show source of compression ie. source. ...Read more

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What is more accurate, a color carotid doppler ultrasound or a contrast carotid mra?

What is more accurate, a color carotid doppler ultrasound or a contrast carotid mra?

Carotid: A carotid doppler is a good screening procedure. A mra or cta of the carotids is more accurate but not the way to screen patients. ...Read more

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What's more accurate, a color carotid doppler ultrasound or a contrast coratid mra?

What's more accurate, a color carotid doppler ultrasound or a contrast coratid mra?

Both good: Ultrasound is a good screening test. Can give idea about plaque make up. Mra shows flow but can overestimate amount of stenosis. Cta best if ultrasound not normal. ...Read more

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When measuring ascending aorta size(horiz)from sinotobular junction to innominate artery is cardiac mri/mra for morphology more accurate test than cta?

When measuring ascending aorta size(horiz)from sinotobular junction to innominate artery is cardiac mri/mra for morphology more accurate test than cta?

Depends: Done properly, ideally with ECG gating, an aortic MRA is equivalent to an aortic CTA. The opinion from some vascular docs is an overestimation on MRA. This was probably from movement artifact and older scanners. The benefit of MRA is the lack of iodinated contrast and lack of radiation. It is in routine use at many large medical facilities to periodically track aortic enlargement- kids/adults ...Read more

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Is coronary cartography reliable alternative to angiography?

Is coronary cartography reliable alternative to angiography?

Heart evaluation: Catography seems to be just as reliable as angiography except that it is non invasive and is a boon to the patient. ...Read more

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Digital rectal exam lithomy position?

Digital rectal exam lithomy position?

May depend on doctor: A good position for a rectal exam is a one where the anus is accessible to the doctor's finger, and the doctor feels he is able to get a really good exam: lying on the side, bent over the examination table, or lying down with feet in stirrup (lithotomy position), etc... The position is not that important. What's important is that the dr. Is able to reach and feel everything he wants to examine. ...Read more

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Whats safer: coronary angiogram or CT angiogram?

Whats safer: coronary angiogram or CT angiogram?

Ct vs cath: In simplest terms the ct angiogram would be safer than a coronary angiogram, however, they are usually used in different circumstances. The ct angiogram is useful as a screening tool to see if coronary disease is present. A cardiac catheterization is performed when a patient has an acute coronary syndrome or a myocardial infarction to evaluate coronary disease, or even treated. ...Read more

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Carotid artery disease, different results from duplex ultrasound vs. Ct angiogram (cta), is that possible?

Results: Because these are two different imaging modalities, it is possible to get divergent results. Generally however these two studies show congruent data. ...Read more

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Accuracy of carotid artery ultrasound to detect circ problems and impending cva?

Accuracy of carotid artery ultrasound to detect circ problems and impending cva?

Screening test: Ultrasound is a good screening test for carotid stenosis which is a risk factor for a stroke, however the ultrasound even in an accredited lab is not predictive of risk for stroke. Stroke may be ischemic or hemorrhagic and may not be caused by carotid disease. ...Read more

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Could duplex ultrasound replace arteriography in screening for mesenteric ischemia?

Could duplex ultrasound replace arteriography in screening for mesenteric ischemia?

No screening: There is nothing called screening for mesenteric stenosis. If you have no symptoms then you no need to screen for occlusion. If you have chronic symptoms then duplex ultrasound is a good starting test but has a lot of limitations. In cases of acute ischemia then ct scan is best to start with. ...Read more

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What's safer: coronary angiogram or CT angiogram?

What's safer: coronary angiogram or CT angiogram?

Both safe: Both also have risks such as radiation and contrast usage. Coronary arteriography has small bleeding risk at puncture site. Need to get the right test for your problem. Coronary arteriography is the gold standard. ...Read more

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Ct coronary angiogram takes pictures of what parts?

Ct coronary angiogram takes pictures of what parts?

Arteries: A ct angiogram takes pictures of the coronary, or heart, arteries. It also gives information of the remaining cardiac structures. The main pumping chambers, or ventricles, the heart muscle walls and some information regarding the heart valves as well. If there are bypass grafts from previous surgeries, these can often be visualized as well. ...Read more

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If I have diabetes should I get a digital subtraction angiography scan?

It depends upon: What the indication is, and what symptoms or problems you're having. Depend upon your doctor's recommendation. ...Read more

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Would i be alowed to listen to music while having an digital subtraction angiography test.. ?

Why not?: This procedure is usually done under light sedation. They may let you listen to music. It wouldn't hurt to ask. ...Read more

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Digital subtraction angiography. How long does the test take and what happens in it? Can u run me through step by step? :) is it noisey?

Long answer: This would be a long answer. But basically dsa is performed in a suite with x-ray. A catheter is placed unto the artery usually from the groin. You will be sedated some. X-ray contrast is injected into artery in the area of the to be evaluated. The x-ray will take a movie of the contract in the artery as it moves. At the end the catheter will be removed and pressure held till the bleeding stops. ...Read more

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Who does angiography?

Who does angiography?

Cards or vascular: Angio refers to vessel so could be any vessel, but most frequently refers to coronary (heart) vessels, therefore cardiologist usually performs. Other common vessels include aortic and femoral / iliac vessels, carotids, renal arteries and mesenteric vessels. These vessels are often imaged by interventional radiologists or vascular surgeons. ...Read more

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Is angiography test is not safe?

Is angiography test is not safe?

Not risk-free: When done by a well trained/experienced physician, it should be a safe procedure however that does not mean that it is free of risk. If determined to be necessary, the benefits of the test should outweigh the risks. The physician performing the test should discuss risks and benefits with the patient prior to angiography. ...Read more

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What is the price of angiography?

Depends: It depends on which blood vessel the angiogram involves. It also depends if treatment will occur during the angiogram. ...Read more

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What is the definition or description of: angiography?

Angiography: encompasses several medical imaging tests that visualize the anatomy and pathology of blood vessels. Standard angiography involves catheterizing a vessel and injecting contrast under X-ray visualization. Less invasive angiographic techniques include MR angiography and CT angiography . ...Read more

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What information do I have to bring along to do the angiography?

What information do I have to bring along to do the angiography?

List of allergies: Bring a list of allergies and a list of meds you take. Your kidney function is important and your doctor will have checked it with a blood sample. Do not eat for at least 4 hours before the test. If you have diabetes, depending on the time of your exam, you might be asked to hold some or all of your dm med. Aspirin is ok but other blood thinners are often held. ...Read more

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What is radionuclide angiography?

What is radionuclide angiography?

Dye study of heart: This is a study in which dye is shot into your vessels and images captured to determine the efficiency of chambers and valves. The test may be done at rest or with exercise / stress. ...Read more

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What’s CT angiography?

Specially : Timed ct scan to evaluate arteries of the body part imaged. See radiologyinfo.Org. ...Read more

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Are angiogram and angiography the same thing?

No: Technically no. An angiogram is the image taken when the artery is injected with dye and imaged under x-rays. Angiography is the procedure used to obtain an angiogram. They are often used interchangeably in the vernacular. ...Read more

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Is an angiogram and angiography the same thing?

Almost: One is the procedure. The other is the result. The analogy (in sat form) is angiogram : angiography :: photograph : photography. So you do angiography to get the picture (the angiogram). ...Read more

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Which contrast media are used in an angiography?

Angiogram: Non ionic contrast is used for CT angio and fluoroscopic angio. Gadolinium contrast is used for MR angio. ...Read more

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Is the difference between an angiogram and angiography?

Yes: An angiogram is the actual procedure with associated images of the specific vascular territory. Angiography is term to describe the imaging modality. ...Read more

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Angiography surgery -should I travel to a city for this?

Angiography surgery -should I travel to a city for this?

Yes: Yes if you need to get angiogram ( ? With possible stent placement of that blood vessel ) if that service is not available in your local area. ...Read more

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What is the difference between angiogram and angiography?

What is the difference between angiogram and angiography?

Verb versus noun: Angiography is the process of performing an x-ray picture (or an image) of a blood vessel by injecting the vessel with an opaque dye. Th dye often contains iodine. An angiogram is the picture of the blood vessel that was taken while performing angiography. ...Read more

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What is the difference between aortography and angiography?

Subset: Angiography is a study in which the blood vessels are visualized (e.g. Arteries of the leg or heart). An aortography is just a subset of that - visualizing the biggest artery in the body - the aorta. So, an aortography is an angiography but not vice versa. ...Read more

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What is the difference between an angiography and angioplasty?

Diagnosis vs treatmet: angiography is the placement of contrast (dye) in an artery. angioplasty is the dilatation of an artery usually with a balloon. ...Read more