Grüße und Vorstellung » When they used OCT to look at brain tissue fro

Michael Phelps of the United States of America reacts during the men's 200m individual medley semifinal of swimming at the 2016 Rio Olympic Games in Rio de Janeiro adidas nmd xr4 suomi , Brazil, on Aug. 10, 2016. (XinhuaFei Maohua)
RIO DE JANEIRO, Aug. 10 (Xinhua) -- Michael Phelps described his rivalry with Ryan Lochte as "special" as the US teammates prepare to go head-to-head in another Olympic swimming final on Thursday.


Phelps qualified fastest for the 200m individual medley decider with a time of 1 minute 55.78 seconds in his semifinal at the Olympic Aquatics Stadium on Wednesday.


Lochte finished half a second behind him with Brazil's Thiago Perreira third in 1:57.11.


"You know the history him and I have had with one another is something special and something I've never had in another competitor of mine," Phelps said. "We've been racing for the last 12 years and having one more battle tomorrow, it will be fun.


"I consider Ryan and I have probably grown closer as friends this year than we have in the past adidas nmd xr1 suomi , so we'll have one more time to hop in the pool and duke it out."


Phelps, the most decorated Olympian in history with 21 gold medals, has won each of his three finals in Rio so far: the 200m butterfly, the 4x100m freestyle and the 4x200m freestyle.


On Thursday he will be aiming to become the first swimmer to win the same event at four consecutive Olympic Games.


Al Oerter (discuss) and Carl Lewis (long jump) are the only athletes to have achieved the feat.


Phelps could also reach the milestone in the 100m butterfly.


WASHINGTON, June 17 (Xinhua) -- A new imaging technology can be used to help surgeons take out as much brain tumor as possible while keeping surrounding healthy tissue intact, an important technological advance that could improve survival time for brain cancer patients adidas nmd cs2 suomi , a U.S. study said Wednesday.


The technology, called quantitative optical coherence tomography (OCT), can do this by providing surgeons with a color- coded map of a patient's brain showing which areas are and are not cancer, according to the study published in the U.S. journal Science Translational Medicine.


"As a neurosurgeon, I'm in agony when I'm taking out a tumor. If I take out too little, the cancer could come back; too much adidas nmd cs1 suomi , and the patient can be permanently disabled," said Alfredo Quinones-Hinojosa, a professor of neurosurgery, neuroscience and oncology at the Johns Hopkins University School of Medicine and the clinical leader of the research team. "We think optical coherence tomography has strong potential for helping surgeons know exactly where to cut."


First developed in the early 1990s for imaging the retina, OCT operates on the same echolocation principle used by bats and ultrasound scanners, but it uses light rather than sound waves adidas nmd runner suomi , yielding a higher-resolution image than ultrasound does.


For the past decade, research groups around the globe, including a group at Johns Hopkins led by Xingde Li, a professor of biomedical engineering, has been working to further develop and apply the technology to other organs beyond the relatively transparent eye.


Li's research first built on the idea that cancers tend to be relatively dense, which affects how they scatter and reflect lightwaves www.nmdsuomi.com , but eventually they found a second special property of brain cancer cells -- that they lack the so-called myelin sheaths that coat healthy brain cells -- had a greater effect on the OCT readings than did density.


Based on the characteristic OCT "signature" of brain cancer, the team devised a computer algorithm to process OCT data and, nearly instantaneously, generate a color-coded map with cancer in red and healthy tissue in green.


"We envision that the OCT would be aimed at the area being operated on, and the surgeon could look at a screen to get a continuously updated picture of where the cancer is -- and isn't," Li said.


When they used OCT to look at brain tissue from 32 patients with cancer and five noncancerous brain tissue samples adidas nmd kengät suomi , they found that the imaging technique improved the diagnosis of cancerous versus noncancerous tissues, compared to a surgeon's evaluation.


The team also used OCT to develop color-coded maps of human brain tumors implanted in five mice, and surgically removed the tumor tissue -- and not any healthy tissue -- with the maps' guidance.


So far, the need to identify cancer tissues readily and intraoperatively has led to the development of different surgical adjuncts such as magnetic resonance imaging (MRI) and ultrasound.


But ultrasound has a much lower resolution than OCT, and MRI scanners designed to be wheeled over a patient on the operating table cost 3 million to 5 million dollars each, require an extra hour of operating room time to obtain a single image and do not provide continuous adidas nmd kengät miehet , real-time intraoperative guidance, Li said.


By comparison, the team anticipated that the cost of an OCT- based system would be only about 5 percent of that of a MRI scanner. Additionally, OCT is capable of imaging tissues in three dimensions in real time and in a noncontact way, which will minimize infection risks for intraoperative use.


The team planned to begin clinical trials in patients this summer.


GarageBand for iPad allows you to record each MIDI and audio, and every single serves a different goal. MIDI is type of musical info that’s widely used in music technology adidas nmd kengät , and involves telling software program which notes to play back, in what order, how tough and so on. MIDI in GarageBand is recorded by creating a computer software instrument after which tapping the pertinent parts with the screen to enter notes at distinct points interestingly you can even connect particular models of USB MIDI keyboard by way of the camera connection kit and play notes in utilizing this.


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