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Doctor insights on: How Accurate Are Ct Scans

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How accurate are MRI scans?

How accurate are MRI scans?

Variable accurancy: The accuracy of MRI depends a great deal on the person who is being scanned being able to hold still during the scan. Motion artifact is the most common artifact that decreases the accuracy of an MRI. The overall accuracy also depends on if the right type of MRI is ordered and if contrast is used where needed. ...Read more

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Dr. Brad Goldenberg
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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How accurate are CT scans for brain tumors?

How accurate are CT scans for brain tumors?

VARIABLE: Ct scans can often detect an abnormality. Use of contrast will identify additional lesions. However, use of MRI scanning with and without contrast can often more clearly show a brain tumor. ...Read more

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How accurate are CT angiogarams?

How accurate are CT angiogarams?

Good exam. : CTA very accurate. CTA must be tailored to your problem to be the most accurate. Sometimes Doppler ultrasound, magnetic resonance angiography/ MRA, or conventional angiography are required instead. See radiologyinfo.org for details about these studies. ...Read more

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How accurate are ultrasound scans in pregnancy?

How accurate are ultrasound scans in pregnancy?

Depends: The precision of an ultrasound depends somewhat on the equipment, the technician, the interpreter & the reason for study. If the scan is done to verify the placental location, fetal position & head size(to verify dates), simple equipment works ok. Specific things about baby like heart anatomy, facial features and the like, require a skilled technician using special equipment & interpretation. ...Read more

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How are mr scan and a CT scan different?

How are mr scan and a CT scan different?

Contrast difference: Ct uses a combination of xrays shot from multiple directions to look at differences in tissue density. Mri uses strong magnetic fields instead of xrays to differentiate tissues and gives much better contrast than ct. Ct is typically used in the acute setting to see if there is blood or major abnormalities. Mri is a more specific exam to differentiate abnormalities such as stroke or tumor. ...Read more

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How reliable are cat scan guided biopsies?

How reliable are cat scan guided biopsies?

Very: Ct guided biopsy is very accurate , as it is done under direct visualization of the suspicious lesion, is relatively safe precise ( depending on the location )and will give accurate diagnosis ...Read more

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How accurate are contrast cat scan in detecting non ruptured annreuysms brain?

How accurate are contrast cat scan in detecting non ruptured annreuysms brain?

Aneurysms: Compared with the number of aneurysms detected on dsa, the overall accuracy rates of cta and mra for aneurysm detection were 89% and 90%, respectively. 4 the sensitivity for aneurysms 3 mm was 96% for cta and 94% for mra. ...Read more

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Are pet scans accurate or are other scans better?

Are pet scans accurate or are other scans better?

Depends: Depends on what you are looking for. PET scan usually uses a glucose based tracer to evaluate metabolic activity which can be increased in tumors. All modalities have a certain rate of false positives and negatives. Sometimes multiple modalities can each give you different information to obtain a complete evaluation. ...Read more

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How are pet scans , cat scans, and x-rays different?

How are pet scans , cat scans, and x-rays different?

Anatomy v physiology: Ct / x rays show your body's anatomy . Pet shows the metabolism of the anatomy. ...Read more

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Are CT Scans accurate at discovering cancer?

Are CT Scans accurate at discovering cancer?

So-so: It depends where, how big the cancer is, and so forth. The new CT scans pick up lung cancers that are quite small -- most of the "cures" of tumors found this way may be of non-aggressive tumors. A scan can pick up a mass suspicious for cancer but of course tissue's required for certainty. ...Read more

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What are the differences among CT scans, MRI scans and myelograms?

What are the differences among CT scans, MRI scans and myelograms?

Myleogram: Ct myleogram is a better postop test then mrimyleogram invasive contrast in spinal canal MRI noninvasive. ...Read more

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Ct scan, mri, nuclear medicine imaging, ivp scan, how are they different?

Ct scan, mri, nuclear medicine imaging, ivp scan, how are they different?

Quite different: Ct involves xray type radiation with cross sectional imaging in transaxial, sagittal, and coronal projections. Nuclear medicine, internal irradiation either injected intravenously, inhaled, ingested, injected subcutaneously.Ivp uses injection of contrast material for visualization of kidneys and bladder with x-ray. Mr imaging uses no ionizing radiation magnetic fields to generate x-sectional images. ...Read more

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How do pet scans, mri, ct, and bone/gallium scans differ?

How do pet scans, mri, ct, and bone/gallium scans differ?

Different mechanisms: Mri uses magnetic radiation( no x-ray) for anatomic localization and characterization of different parts of body, water and fat constitution of different tissues.Ct uses x-ray to characterize anatomy of body, better for bone than mr.Pet, bone, gallium scans use radio tracers intravenously.Petglucose metabolism of tumors, gallium (infection/tumor), bone scan for fxs, tumors, infection bone metabolism. ...Read more

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How are an MRI and CT scan different?

How are an MRI and CT scan different?

Differences: The ct scan uses radiation from multiple x-ray devices to see internal organs. The MRI uses very strong magnetism to orient the body's water molecules and see internal structures such as ligaments, joints, brain, etc. Each study has its own individual benefits or indications. ...Read more

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What are CT scans used for?

The potential: indications of CT are numerous. CT can be used to evaluate anatomy and diagnose abnormalities in almost any part of the body. CT can also be used as image guidance for a variety of diagnostic and therapeutic procedures. CT can also be used to monitor therapeutic responses for certain diseases. ...Read more

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Can CT scans accurately detect arteriosclerosis?

Can CT scans accurately detect arteriosclerosis?

OnlyAfterLongEnough: Atherosclerosis, known to start ~age 7 on average, & microcalcifications (within artery wall smooth muscle cells just outside the plaque) can be seen with a microscope & ca+2 stains within early years but are too small to see with any current ct machines. These may become visible by the best ct machines by early 30's, 2 decades later but typically a decade before obvious clinical events & symptoms. ...Read more

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What are the differences between pet scans, mri, ct, and bone/gallium scans?

What are the differences between pet scans, mri, ct, and bone/gallium scans?

Anatomy vs Physiolog: Mri and ct scans are typically looking at the anatomy of a patient, as well as differences in blood flow if contrast is administered. Pet, bone and gallium scans are all looking at the function, or physiology of the patient, and the anatomy is of secondary concern. For example, pet scans are usually using f-18 fdg, a glucose analog, and display differences in glucose use, a main energy source. ...Read more

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How accurate are breast mri's?

How accurate are breast mri's?

Pro's N Con's: Breast MRI is more sensitive than mammograms for finding breast cancer, but at a significant cost, both financial & finding 'false alarms' which often require biopsy. Overall, current indications are limited to women at very high risk for ca, checking for implant rupture, preoperative surgical planning, and follow-up of some cancer survivors. ...Read more

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How accurate are x-rays in detecting hairline fractures?

How accurate are x-rays in detecting hairline fractures?

Varies: It varies a little based upon the area of the bone involved. But your implication is correct, there are times that you can have such a small fracture that it does not always show up on X-ray. Both MRI and ct scan are more sensitive in picking up a fracture than X-ray. ...Read more

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