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Bone abnormalities: Bone scan involves intravenous injection of radio tracer usually technetium 99m mdp which accumulates in skeleton. Scan may involve early phase(5-10 min) and late phase(2-3 hr) imaging. Increased uptake is seen in fractures, tumors, infection, etc. Decreased activity is seen in metal artifacts, aggressive tumor/infection, & loss of blood supply to bones. Bone scan very sensitive but not specific. ...Read moreSee 2 more doctor answers
Not great: X-RAYs are relatively insensitive in the detection of early or small metastatic lesions. Although CT scans are superior, CT scanning is relatively insensitive in showing small lesions, and it has the disadvantage of limited skeletal coverage. Bone scans are very sensitive (they'll pick up everything) but nonspecific (could be just arthritis). MRI and PET scanning are accurate but very expensive. ...Read moreSee 1 more doctor answer
Yes: Yes.Get a more detailed answer ›
No iodine bone scan: Nuclear medicine bone scans are performed using a radionuclide called tc 99m mdp. It is a radioactive particle tagged to a molecule involved in bone metabolism. Common exam, around for decades. There is now a new scan using a pet/ct scanner and an isotope sodium flouride. It is sensitive and more accruate but also more expensive and less available. ...Read moreSee 1 more doctor answer
Not quite: The CT of the sinuses focuses in on the sinuses (though the radiation goes through the entire skull) and generally covers the entire set of sinuses (sphenoid, maxillary, frontal, ethmoid). The orbital CT will cover the eye sockets (and those pictures are zoomed in). While the sinuses lies behind the eyes (& so they overlap), the focus & coverage of these scans are slightly different. ...Read moreSee 1 more doctor answer
Osteomalacia: No. A Dexa detects osteoporosis, or decreased amount of bone matrix. Osteomalacia is an abnormal type of bone, soft bones, abnormal building process. You can have both osteoporosis/malacia, so dexa is still done in the workup to measure the amount of bone. Vit D deficiency, GI disorders that cause malabsorption, kidney disease, liver disease, certain drugs... all are part of the differential. ...Read moreSee 1 more doctor answer
Knee mri showed torn meniscus and bone spurs. Now dr wants bone scan.is that scan needed after mri. What would bone scan show that isn't on mri??
Inside bone/tendons.: Bone cysts r contained inside the bone, any where from simple benign @ malignant and need watching. Spurs r at the edges of the bone as in arthritis, or in response 2 tendinitis where a tendon attaches. As patellar tendinitis or where ligaments attach as in heel spurs ( planter fasciitis). Treatments r different 4 each & multiple 4 each. B followed & rx'd by an orthopedic surgeon. ...Read more
Radiology/neurology. Ct scan shows bone, MRI shows soft tissue, so therefore can't indentify disease of skull bones. Intercrainial means misdiagnosis?
Sometimes same dose: Background radiation at sea level: 3 msv per year, denver residents get: 6 msv per year, cross country flight: 0.02 msv, x ray chest: 0.06 msv, ct head: 3 msv, ct chest: 5 msv (equivalent to 100 chest xrays) ct abdomen: 5-10, average bone scan 6.5 msv. Radiation depends on size of patient." radiation affects growing body in children more than adults. Doses to children are much less. ...Read more
Mri shows three lobulations in bone above knee. Bone scan says everything ok. How could mri and bone scan show two different results?
Different studies: The meaning of "lobulations" in the bone on an MRI study is uncertain. This may mean an osteophyte, cortical thickening, old trauma, a normal variant, or something else. The bone scan measures bone chemistry and activity such as repair of the bone. When the bone scan is normal with these findings on MRI, it means normal bone chemistry, and indicates a none serious problem. ...Read moreSee 1 more doctor answer
PET/CT scan: You need to fast for 4 hours first, then you will recieve an injection of a small amount of radioactive glucose (i.e. Sugar). Next you will sit in a recliner chair for about 70 minutes to allow the glucose to distribute throughout you. Then you will lie on your back on the pet/ct scanner (a tunnel shaped machine) for 20 minutes. There are no side effects from the test or restrictions afterwards. ...Read moreSee 2 more doctor answers
Bone is a living growing tissue made mostly of collagen (protein that provides soft framework) & the mineral calcium phosphate that adds strength & hardens the framework. Two types of bone are found in the body; cortical (dense compact outer layer) & trabecular (makes up inner layer, ...Read more
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