Doctor insights on:
Do Ct Scans Detect Glaucoma
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
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 moreSee 2 more doctor answers
CT scan: It depends what do you call a regular ct scan but usually IV contrast dye is needed to visualize the aneurysm. There are non contrast exams and others where IV contrast is employed. Where is the aneurysm located ?. If it's large and calcified and perhaps located in the abdomen or chest it can be suggested by the non contrast ct. An ultrasound can detect readily in the abdominal aorta. ...Read more
They can: The diagnostic yield of increased with use of IV contrast material as some tumors disrupt the so called blood brain barrier affording the contrast the ability to infiltrate from the blood stream into the tumor. Small tumors that have not disrupted the integrity of blood vessels may escape detection on CT especially if the have the same radiographic tissue density as their surrounding tissue. ...Read more
CT angiogram: A regular ct scan might detect a large aneurysm with calcium. A test that is designed specifically to look for aneurysms is the ct angiogram. With this test contrast goes into the vessels of the brain. If there is an aneurysm that is larger than 2 mm, it should be detected with this technique. ...Read more
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
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
Answer via Questions: We rely on the answers people give to questions about their thoughts, emotions and behaviors to determine whether (a) they have symptoms of depression; (b) how many they have; & (c) how severe each is/how much each interferes w/ person's ability 2 function day 2 day. Standard MRI machines produce great still shots of the brain but those pics don't show depression or what someone is thinking, etc. ...Read moreSee 1 more doctor answer
less accurate: While there is controversy about the liberal use of ct scans for the diagnosis of appendicits, it does increase accuracy of diagnosis. There are several parameters on ct scan that are used to diagnose or exclude appendicitis: visualization of the appendix, free fluid around the appendix, blurred fat or fat stranding around the base of the appendix and free air in the area of the appendix. ...Read more
Nsclc st4. Diagnostic CT scans used iodine contrast but due to allergy, post treatment CT scans used barium. How accurate/comparable are the scans?
What are the chances an ultrasound, Mri/mrcp, ercp, and ct scans or imaging miss advanced liver cancer?
If it is tailored: For liver mass, and technically adequate(i.e. no artifacts that might obscure anatomy), it would be nearly impossible to miss a large liver tumor. ...Read more
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