Reference Terms
from Wikipedia, the free encyclopedia
Bone scan
Bone imaging is a study to visually detect bone abnormalities. Such imaging studies include magnetic resonance imaging (MRI), X-ray computed tomography (CT) and especially nuclear medicine. In the latter case the patient is injected with a small amount of radioactive material such as 600 MBq of technetium-99m-MDP and then scanned with a Gamma camera, a device sensitive to the radiation emitted by the injected material.
About half of the radioactive material is localized by the bones. The more active the bone turnover, the more radioactive material will be seen. Some tumors, fractures and infections show up as areas of increased uptake. Others can cause decreased uptake of radioactive material.
About half of the radioactive material leaves the body through the kidneys and bladder in urine.
The period from injection to completion can last over 4 hours. Actual images are taken for about 30 to 70 minutes. Sometimes late images are taken at 24 hours after injection.
Pregnant patients should consult with a physician before consenting to radioactive injections.
Related Stories
1
2
Health & Medicine News
September 28, 2026
Sep. 28, 2026 People with diabetes reported better quality of life after days when their glucose stayed largely within a healthy range, even when levels fluctuated more than usual. The unexpected finding suggests that pursuing extremely tight glucose control may ...
Sep. 28, 2026 A new study suggests coffee may influence mood and brain function by changing the activity of microbes in the gut. Both caffeinated and decaf coffee were linked to lower stress, depression, and impulsivity, while also producing measurable changes in ...
Sep. 28, 2026 Spaceflight may dramatically change the gut within weeks, causing bacteria to break down more protein as food moves more slowly through the intestines. The shift could help explain astronaut constipation and may have wider effects on health, making ...
Sep. 28, 2026 A compound the body can make after eating pomegranates, walnuts, and some berries improved measures of heart function by up to 80% in animal models of a difficult-to-treat form of heart failure. Urolithin A helped stiff heart tissue relax and ...
Sep. 28, 2026 Scientists resurrected antimicrobial peptides from mammals that lived millions of years ago and found that some were more potent against drug-resistant bacteria than modern human versions. These evolutionary relics could provide new clues for ...
Sep. 28, 2026 Strengthening the body’s natural daily rhythms helped mice recover after stroke by improving the brain’s waste-clearing system and reducing lingering inflammation. The approach worked even when treatment began three days after the stroke, ...
Sep. 27, 2026 Scientists found that immune cells contributing to Alzheimer’s-related brain damage may be activated in lymph nodes outside the brain before traveling into the nervous system. Blocking this pathway in mice dramatically reduced neurodegeneration ...
Sep. 27, 2026 A large health-record analysis found that glucosamine use was associated with a 25% higher likelihood of mild cognitive impairment progressing to dementia. Lab experiments suggest the popular joint ...
Sep. 27, 2026 Direct oral anticoagulants cut the risk of serious clinical events by 69% in atrial fibrillation patients with an intermediate risk of stroke, according to the randomized SINGLE-AF trial. The benefit was driven mainly by fewer ischemic strokes, with ...
Sep. 27, 2026 A single dose of an experimental CRISPR therapy cut LDL cholesterol and triglycerides by about half in patients with difficult-to-treat lipid disorders. The reductions were still present one year later, with the highest dose lowering LDL by 52.5% ...
Sep. 27, 2026 Pain and fatigue in rheumatoid arthritis can persist even after inflammation improves, with depression, poor sleep, obesity, smoking, and chronic pain potentially helping sustain symptoms. ...
Sep. 26, 2026 Scientists have mapped the genetics of cat cancer on an unprecedented scale and found surprising similarities with tumors in humans. The findings could help bring precision cancer treatments to cats ...
Latest Headlines
updated 12:56 pm ET
Sep. 26, 2026 A new analysis suggests mammograms may lead to far less breast cancer overdiagnosis than some earlier studies indicated. Researchers reexamined all ...
Sep. 26, 2026 Researchers found that scented cleaners can react with ozone indoors to create billions or trillions of invisible nanoparticles that can penetrate deep into the lungs. The pollution forms within ...
Sep. 26, 2026 Tirzepatide, sold as Mounjaro and Zepbound, activated calorie-burning brown fat in obese mice, revealing a potential metabolic effect beyond appetite suppression. If confirmed in humans, the finding ...
Sep. 25, 2026 Scientists discovered rare flavoalkaloids in Cannabis leaves for the first time, along with dozens of other phenolic compounds that had never been ...
Sep. 25, 2026 A major analysis suggests Phelan-McDermid syndrome, a genetic disorder closely linked to autism, may affect about 1 in 7,300 people and more than ...
Sep. 25, 2026 Researchers used CRISPR to remove CD33 from donor stem cells, potentially giving doctors a way to attack aggressive blood cancers without destroying ...
Sep. 24, 2026 A magnet-producing bacterium extended the average lifespan of C. elegans worms by more than 43% while helping protect their neurological and intestinal health. Researchers traced much of the effect ...
Sep. 24, 2026 Scientists discovered a surprising backup system that lets mammalian cells make the essential amino acid cysteine even when the pathways once ...
Sep. 24, 2026 A 70-year-old leukemia drug is still revealing new secrets. Researchers found that removing a protein called NUDT5 protected cells from the drug, even though simply blocking the protein had little ...
Sep. 24, 2026 A newly identified breakdown in communication between nerves and muscles could help explain why people lose strength as they age. Researchers were able to improve muscle strength in an animal model ...