Technology: The naughty kid ruined my college entrance examination, but I turned over to nuclear fus

Seeing that Lu Yu did not answer this question immediately, as if he had not considered this question at all.

Old Doctor Jiang's eyes couldn't help but show a look of disappointment.

"It seems that his thoughts stop there."

"Also, you shouldn't put too much expectation on a young man, a question that I didn't even think about back then, let alone a young man who looks to be in his early 20s."

"It's really unfair to him to put such a big responsibility on him."

Old Doctor Jiang subconsciously thought that Lu Yu had not thought about this problem at all, let alone proposed any specific solution.

However, for Dr. Jiang, this was also something he expected.

After all, how can an unidentified, young "patient" really propose any solution to the development of domestic NMR instruments in Longguo at once?

Dr. Lin was also subconsciously disappointed and sighed.

As the so-called rice should be eaten bite by bite, the road should be taken step by step, the step is too big, and it may be pulled across.

There are some things that you really can't put your hopes on others.

That's it!

Such a big thing, just standing here and thinking about it, you definitely can't think of a three-seven-twenty-one.

Dr. Jiang decided to end today's topic.

"Forget it, let's stop the content of today's chat, I'll take you to other physical examination centers first and then do a comprehensive physical examination, and check what is going on with your physical data."

"As for other cases, let's talk about it then."

"If you have any new ideas at that time, you can also call me to communicate again, our topic today, that's the end of it..." Old

Doctor Jiang saw Lu Yu's frowning and thinking, and waved his hand helplessly, just wanting to end today's topic.

But at this moment, Lu Yu opened his eyes again, and his eyes were full of confidence again:

"Mr. Jiang, wait a minute, I already have an idea."

"Oh?"

Old Doctor Jiang glanced at Lu Yu suspiciously, and there was some disbelief in his eyes: "You tell me first, what is your train of thought?" As for whether this idea works, we will talk about it then. Although

he didn't believe that Lu Yu really had a way to solve the problem he mentioned earlier.

But Tiandu talked to this extent, if it really ended today's topic so hastily, then Mr. Jiang was also a little unwilling in his heart, although this probability is very low, low to the point of outrageousness. '

But.... What if!

What if Lu Yu can really put forward some extraordinary insights and really bring some new impetus to domestic NMR devices?

Even if the probability of this trillion is very low, but Dr. Jiang feels that it is still worth gambling, anyway, in the end, even if the plan proposed by Lu Yu does not work, there is no loss, right?

Under the nervous gazes of Dr. Lin and Dr. Jiang.

Lu Yu smiled slightly:

"Mr. Jiang, I have just properly considered the problem you mentioned earlier. Actually, you want to ask more than that, right?

"Yes." Doctor Jiang nodded and said

, "The problem of optimizing the scanning parameters you raised is indeed not only the point I raised, but the problem I raised is the one that needs the most attention of all troubles, if even this problem cannot be solved, then let alone the problem behind."

"Well, I agree with you too." Lu Yu chuckled and nodded and said, "

There are actually a few problems we are currently facing."

"The first one, and the problem you mentioned, is that fast pulse train technologies are affected by magnetic field inhomogeneity, magnetic susceptibility, because they cause changes in T2* and phase mismatches, which further affect the refocusing and image quality of the echo signal."

"There is a second point, that is..."

"Fast pulse train technology will increase the demand for RF power, which will lead to the increase of tissue heating and specific absorption rate, which may cause adverse effects on the human body..." "

These are all objective problems with this technology, even if we want to ignore it, we can't ignore it."

"The impact of the first problem is undoubtedly affecting the refocus and image quality of the image, which may lead to errors in the doctor's judgment ability, resulting in the loss of treatment opportunities for patients who would otherwise have the opportunity to be saved as soon as possible."

"The second question, although you didn't mention just now, is also a fatal problem for MRI technology."

"Why should we check the body?"

"At the end of the day, we want to have a healthy body."

"But if when performing an MRI to examine the body, it will cause adverse effects on the human body because of the research process, then how many people are willing to continue to do this MRI?"

"So how to properly solve these two points for our current state of NMR technology is an urgent matter."

"You just asked me if there was a solution, and the reason why I didn't answer you right away was not because I didn't have a clear idea of it in my head, but I had so many technologies in my head that I needed to choose the one that worked best for us."

Lu Yu smiled and said with a confident look.

"What?"

After hearing Lu Yu's answer clearly, whether it was Old Doctor Jiang or Doctor Lin, a look of disbelief flashed on the faces of the two people!

"You mean you knew how to solve these problems from the beginning, but you didn't know which solution to choose?!" Doctor Jiang asked again.

"That's right."

"The problem you mentioned, as well as the problem I just raised, is a difficult hurdle for our current NMR device technology, but no matter how difficult the level is, there is a solution."

"It's just that we need to pick out the solution that works best for them to solve the problem."

"Different solutions can create different problems."

"And different problems may require more solutions."

"In the long run, countless problems will arise and countless solutions will be required, which is a futile internal friction for the entire NMR device technology."

"So what we need to do is not to make the MRI device technology free of any problems, but to keep this problem as far away from the core area as possible, without affecting our inspection of substitution."

"Just avoid this, then even if there is really something wrong with this machine, it will not affect the operation of the entire NMR device technology."

Lu Yu's smile was very confident.

In fact, from the very beginning, after Dr. Jiang raised the question, Lu Yu's mind had already popped up a prototype of a solution.

The reason why he didn't say it right away, but told Dr. Jiang and Dr. Lin that he needed to think again, delayed for a while... It's because the technology provided by the system is too perfect!

So perfect that there are so many options for him as an alternative solution!

With more options, jumping is more time-consuming.

There are so many options that he needs to choose carefully and pick out a solution that is most suitable for the current situation of domestic NMR device technology, so as to better contribute to the development of domestic NMR device technology!

After all....

If they had chosen a solution, it would have solved the problem they are currently facing.

But that's not the best option.

Just as the so-called excellence, there are better options, then it is definitely more appropriate to choose options that are more suitable for domestic joint venture resonance device technology, and it is more able to make state-owned communist technology progress in a better direction.

"This..."

"Let's talk about it in detail."

"What exactly is your plan?"

Mr. Jiang now also doesn't know whether he should trust the young man in front of him.

On the one hand... These things he said are all space, and he has long thought of a solution, and there is more than one solution, which can be described as stunned!

How do you look like that kind of liar?

But on the other hand, this guy in front of him has no motive to be a liar, not to mention his confident expression, he is obviously confident about his plan, at least very sure!

So the question is, what is the truth?

Does he really have those two brushes, or is it a pure "general faith" state?

Old Doctor Jiang was also not sure, and he could only judge by listening to what Lu Yu's specific plan was.

And the researcher who came with Lu Yu next to him, his face did become a little inexplicably complicated, or funny, Yuan Ying couldn't be simpler, this is not the first time he has encountered such a scene!

If at the beginning, he still wondered if Lu Yu could propose any solution to improve the technology of nuclear magnetic resonance devices... Feel skeptical.

Well now.

He was almost ninety percent sure in his heart, believing that Lu Yu would be able to propose some very groundbreaking technologies.

There is no other reason, because he has seen such a scene more than once!

When he was at the Zhurong 2 aerospace research base, Lu Yu's expression was equally confident, and Director Lin's reaction at that time was the same doubt, unbelievable!

The reaction of Dr. Lin and Dr. Jiang Lao today is exactly the same.

The initial cause and the course of the incident seem to be the same as everything that happened in this physical examination center today.

It's just one result!

Considering the terrible performance of Lu Yu in the aerospace program....

So it is said that aerospace technology and this nuclear magnetic resonance technology can not be said to be incompatible, but let's put the same confidence on a fool, that is blind confidence and arrogance, but put on a genius.... That's definitely a confidence!

The researcher had even made sufficient preparations in his heart, waiting to see the shocked performance of Director Lin and Dr. Jiang for a while.

It's at this time!

Lu Yu said directly:

"I won't sell off with you two, I think for us... The most suitable solution is actually quite simple.

"On the one hand, methods such as small-angle excitation pulses, multiple excitation pulses, and segmented excitation pulses are used to reduce the consumption of RF power and the value of SAR."

"The other side."

"Self-correction, phase correction, and metal artifact removal are then used to improve the influence of magnetic field inhomogeneity and magnetic sensitivity."

"Two-pronged, two paths together!"

"This is the best solution!"

"I can understand the first one, but I don't understand it with phase correction and metal artifact removal."

Dr. Lin frowned and asked suspiciously,

"What does this have to do with fast pulse train technology?"

"To figure out the relationship between them, you have to know what the specific technique of phase correction is."

"Knowing that, you'll be able to figure it out."

Lu Yu glanced at the old doctor Jiang next to him, and sure enough, his face was as usual.

Ginger is still old and spicy, compared to Dr. Lin, he is obviously older, and Mr. Jiang who knows more has a wider range of knowledge.

Therefore, Lu Yu also directly faced Dr. Lin and briefly introduced:

"Phase correction is a method that uses external information to estimate and correct phase errors. It usually requires one or more reference or correction scans before or after a scan to obtain information about phase errors. "

Then, based on the relationship between the reference data and the original data, the phase error is calculated and applied to the original data to eliminate artifacts."

"In a sense, it's the same idea as removing metal artifacts."

"The advantages of the phase correction method are that they can achieve high phase accuracy, but the disadvantages are the additional scanning time and cost required, and the high quality requirements of the reference data."

"So, do you understand?"

"I... Roughly understood. Dr. Lin nodded gently.

After all, he is a high-quality student, and he is a student of Old Doctor Jiang, after Lu Yu woke up so little, where did he not understand?

It's just that at this time, the old doctor Jiang next to him was a little hesitant.

He had no doubts about correcting the phase, and the purpose of removing metal artifacts was clear.

However, at the specific technical level, he has a problem that he has not considered clearly!

After hesitating for a second, with a half-believing attitude, Dr. Jiang once again asked, "

What is your general direction for the plan to remove metal artifacts?"

"There are many ways to achieve the goal of removing metal artifacts, but they are often not very effective, which is limited to our current imaging technology."

"The distorted data, as well as the data loss caused by scattering, are not a problem that can be completely solved by simply removing metal artifacts."

"It's more about technology that may require more long-term technological progress before there is a little hope of doing it."

"If this point is not clear, then those ideas of yours before are still a dead end!"