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The word "imaging" in the eleventh paragraph meansA.a picture that you have in your mind,

The word "imaging" in the eleventh paragraph means

A.a picture that you have in your mind, especially about what someone or something is like or the way they look.

B.a technical process in which pictures of the inside of someone's body are produced.

C.the process of making a scientific or computer model of something to show how it works or to understand it better.

D.the opinion people have of a person, organization, product etc.

提问人:网友netweal 发布时间:2022-01-07
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更多“The word "imaging" in the elev…”相关的问题
第1题
In the sentence “He's merely parroting what many others have said ”, the word “pa
rroting ” refers to____.

A、estimating

B、acknowledging

C、imitating

D、imaging

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第2题
Eleven-year-old Angela was stricken with a debilitating (衰弱的) disease involving her ner

Eleven-year-old Angela was stricken with a debilitating (衰弱的) disease involving her nervous system. She was unable to walk and her movement was【C1】______ in other ways as well. The doctors did not hold【C2】______ much hope of her ever recovering from this illness. They【C3】______ she'd spend the rest of her life in a wheelchair. They said that few, if【C4】______ , were able to come back to【C5】______ after contracting this disease. The little girl was fearless. There, lying in her hospital bed, she would【C6】______ to anyone who'd listen that she was【C7】______ going to be walking again someday.

She was【C8】______ to a specialized rehabilitation(复原) hospital in the San Francisco Bay area.【C9】______ therapies could be applied to her case were used. The doctors were charmed by her undefeatable【C10】______ . They taught her about imaging about seeing herself walking.【C11】______ it would do nothing else, it【C12】______ at least give her hope and something positive to do in the long waking hours【C13】______ her bed. Angela would work as hard as possible in physical therapy, in whirlpools (漩涡) and in exercise sessions. But she worked faithfully【C14】______ her imaging, visualizing herself moving, moving, moving !

One day, as she was staining with all her【C15】______ to imagine her legs moving again, it seemed as though a miracle【C16】______ :The bed moved! It began to move around the room! She screamed out, "Look what I'm doing! Look! Look! I can do it! I moved, I moved !"

Of course, at this【C17】______ moment everyone else in the hospital was screaming, too ,and running for【C18】______ . People were screaming, equipment was falling and glass was breaking. You see, it was the recent San Francisco earthquake. But don't tell that to Angela. She's【C19】______ that she did it. And now only a few years later, she's back in school. You see, anyone who can【C20】______ the earth between San Francisco and Oakland can conquer a piddling (微不足道的) little disease, can't they?

【C1】

A.restrained

B.limited

C.confined

D.restricted

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第3题
I recently took care of a 50-year-old man who had been admitted to the hospital short of b
reath. During his monthlong stay he was seen by a hematologist, an endocrinologist, a kidney specialist, a podiatrist, two cardiologists, a cardiac electrophysiologist, an infectious-diseases specialist, a pulmonologist, an ear-nose-throat specialist, a urologist, a gastroenterologist, a neurologist, a nutritionist, a general surgeon, a thoracic surgeon and a pain specialist.

He underwent 12 procedures, including cardiac catheterization, a pacemaker implant and a hone-marrow biopsy (to work-up chronic anemia).

Despite this wearying schedule, he maintained an upbeat manner, walking the corridors daily with as sistance to chat with nurses and physician assistants. When he was discharged, follow-up visits were scheduled for him with seven specialists.

This man's case, in which expert consultations sprouted with little rhyme, reason or coordination, reinforced a lesson I have learned many times since entering practice: In our health care system, where doctors are paid piecework for their services, if you have a slew of physicians and a willing patient, almost any sort of terrible excess can occur.

Though accurate data is lacking, the overuse of services in health care probably cost hundreds of billions of dollars last year, out of the more than $ 2 trillion that Americans spent on health.

Are we getting our money's worth? Not according to the usual measures of public health. The United States ranks 45th in life expectancy, behind Bosnia and Jordan; near last, compared with other developed countries, in infant mortality; and in last place, according to the Commonwealth Fund, a health-care research group, among major industrialized countries in health-care quality, access and efficiency.

And in the United States, regions that spend the most on health care appear to have higher mortality rates than regions that spend the least, perhaps because of increased hospitalization rates that result in more life-threatening errors and infections. It has been estimated that if the entire country spent the same as the lowest spending regions, the Medicare program alone could save about $ 40 billion a year.

Overutilization is driven by many factors—"defensive" medicine by doctors trying to avoid lawsuits; patients' demands; a pervading belief among doctors and patients that newer, more expensive technology is better.

The most important factor, however, may be the perverse financial incentives of our current system.

Overeonsultation and overtesting have now become facts of the medical profession. The culture in practice is to grab patients and generate volume. "Medicine has become like everything else," a doctor told me recently. "Everything moves because of money."

Consider medical imaging. According to a federal commission, from 1999 to 2004 the growth in the volume of imaging services per Medicare patient far outstripped the growth' of all other physician services. In 2004, the cost of imaging services was close to $100 billion, or an average of roughly $350 per person in the United States.

Not long ago, I visited a friend—a cardiologist in his late 30s—at his office on Long Island to ask him about imaging in private practices.

"When I started in practice, I wanted to do the right thing," he told me matter-of-factly. "A young woman would come in with palpitations. I'd tell her she was fine. But then I realized that she'd just go down the street to another physician and he'd order all the tests anyway: echocardiogram, stress test, Holter monitor—stuff she didn't really need. Then she'd go around and tell her friends what a great doctor— a thorough doctor—the other cardiologist was.

"I tried to practice ethical medicine, but it didn't help. It didn't pay, both from a financial and a reputation standpoint. "

Last year, Congress approve

A.There are a lot of excessive services in American hospitals.

B.Doctors are over-loaded in American hospitals.

C.American hospitals are suffering great losses because of poor health conditions.

D.The health-care service in the American hospitals is systematic and patient-oriented.

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第4题
Scientists studying the activity of the living brain with widely used new imaging techniqu
es have been missing some of the earliest steps in brain activity because those changes are subtle and are masked by reactions that happen seconds later, Israeli scientists say.

The imaging techniques — positron emission tomography scanning and magnetic resonance imaging, known as PET and functional M. R. I. scans — are used prominently in studies of brain activity. The most active brain areas appear to light up on the scans as specific tasks are performed. The two techniques do not measure nerve-cell activity directly; they measure the extra flow of blood that surges to the most active brain areas.

Researchers at the Weizmann Institute of Science in Rehovot, Israel, have monitored these changes in blood flow in anesthetized cats by removing parts of the skull and observing how the nerve cells in activated regions fuel their activities by rapidly removing oxygen from nearby red blood cells.

This rapid uptake of oxygen, made evident by visible changes in the color of the red cells, proves that early oxygen transfer gives these neurons the energy to do their work, the researchers said.

They also found that subtle changes in blood flow began significantly earlier than was detected by PET and functional M. R. I. scans, which lack sufficient resolution and do not form. their images quickly enough to follow such rapid changes. Dr. Amiram Grinvald published the findings in the Journal Science.

"The initial event is very localized and will be missed if you don't look for it soon enough and use the highest possible resolution," Dr. Grinvald said. "Now people are beginning to use our results with other imaging methods."

Working on the exposed brain lets researchers follow electrical activity and the accompanying blood flow in greater detail than is possible by using indirect imaging methods that track neural activity through the skull. However, opportunities for open-skull studies of humans are limited to some kinds of neurosurgery, and researchers must mostly rely on PET and functional M. R. I. images for studies linking behavior. with specific brain activity.

By directly observing exposed cat brains and in similar work with a few human cases, Dr. Grinvald and his associates have been able to observe the first evidence of electrical activity and other changes in brain cells after a light has been seen or a limb moved.

The newest research showed that it took three seconds or more after an event for the flow of blood to increase to an area of the brain dealing with a stimulus. That is the blood-flow increase usually pictured in brain-function studies with PET or functional M. R. I techniques, the Israeli researchers said. However, the initial reaction observed in the Weizmann research by directly imaging the exposed brain — the direct transfer of oxygen from blood cells to neurons — occurred in the first-tenth of a second and was lost to conventional imaging, they said.

The later increase in blood flow to the area, Dr. Grinvald said, was obviously an attempt by the body to supply more oxygen for brain activity. But the increase in blood was so abundant that it covered an area much larger than the region directly involved in the activity being studied, masking some of the subtle changes, he said.

The body's reaction, the researchers said in the paper, was like "watering the entire garden for the sake of one thirsty flower."

Dr. Kamil Ugurbil, said that the Israeli research provided clues that allowed the use of functional M. R. I. scans to picture earlier events in the activity of brain cells.

"Dr. Grinvald's observations are very important, and they have significant implications for functional imaging with high resolution," Dr. Ugurbil said in an interview. "We have actual

A.those changes are subtle and masked by some reactions

B.subtle changes in blood flow began earlier

C.the imaging techniques are out of place

D.the flow of blood to increase to an area of the brain is slow

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第5题
receptor imaging
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第6题
whole body imaging
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第7题
cerebrospinal fluid imaging
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