Chapter 1371 Lord of Thunder, do you know Fourier Transform?
The Lord of Thunder glared at Gretel.
Gretel looked up to the Lord of Thunder.
Wink, wink, wink nicely.
"Teacher~~~Look at this heart valve, you really can't see clearly~~~"
The sugar content in the voice was definitely like stirring up the honeycomb and adding twice as much sugar to the honey. The Lord of Thunder couldn't help but want to frown. If he were anywhere else, he would have scolded:
You are such an adult, and you are still acting like a coquettish person? You are already a fourteenth-level high-level mage, and you are not one of those fourth-level kids who just left the school and ran around all over the place!
Well, it seems that the little guy at level 4 hasn't arrived yet...
But looking around, he swallowed the scolding. Gretel looked at him eagerly, and the silver dragon girl looked at him eagerly;
Forget it, the elves standing around respectfully looked at Gretel eagerly.
Although unlike those in Nevis, where most mages wear level badges, their aura indicates that they are level 15, 16, 17 or 18, up to a half-legendary powerhouse.
In front of these people, you still have to save some face for your disciples.
Well, it's definitely not because it's the territory of elves and it's not easy to spank children!
"Do you need to see it so clearly?"
After a thought, the Lord of Thunder finally decided to return to the topic and asked in a deep voice.
Indeed, for a healer, the clearer he can see, the better, but for him, a damage dealer, the clearer he can see, the more tired he will be!
When he first participated in this project, what he could "see" was a piece of crap that was hard to explain in words——
If he hadn't accepted Grete's suggestion and tried it with an orange first, he wouldn't even be able to distinguish the orange peel, orange segments and orange core;
Then, in order to see the mouse's head clearly, he increased the power of the magnetic field output tenfold, but he only got an image of a model lake. He could not clearly see where the eyes, the skull, and the brain were;
But now, he can easily see the pig's heart clearly, and can even show the beating of the pig's heart. Little Gretel actually wants to see the valves in the pig's heart clearly!
That valve thing... that thing... The Lord of Thunder tried hard to recall the information Gretel handed him:
The valve seems to be a piece of thing in the heart. Sometimes it opens and sometimes it closes. When it is open, the blood flow can pass through, but when it is closed, the blood flow cannot pass through?
In order to perform surgery, do I need to see this clearly?
"Of course it is necessary!" Gretel puffed up his chest confidently. As soon as he stretched out his hand, an elf flew into the laboratory, and then flew out, holding a record book in both hands;
Gretel opened the record book and flicked his fingers. A secret eye passed over the pig's ear, and the numbers on the ear tags were clearly displayed. Gretel followed the numbers on the ear tags and flipped through the record book:
"No. 51... No. 51 is infundibular and pulmonary valve stenosis, combined with pulmonary valve, right ventricular outflow tract vegetations... You see, if you can't see clearly, there will be big problems during the operation.
of!"
"So the accuracy needs to continue to improve?"
"Continue to improve!" Grete nodded firmly. In later generations of nuclear magnetic resonance, before he traveled through time, there were already 7t machines, and the resolution could reach 5 millimeters;
The commonly used commercial version in top tertiary hospitals, the 0t MRI, can also have a resolution of 1 mm, which means that tissues with a size of 1 mm can be clearly seen;
Even if this is not possible, at least give me a 5t NMR!
Teacher, you are a legend, you cannot be inferior to a 5t NMR!
"Teacher, the radius of the piglet's heart valve annulus is about 10 millimeters. If you want to see it clearly, your accuracy must be increased to at least 2 millimeters, not just 1 millimeter!"
While talking, he made gestures. First, he used light and shadow to outline something with a radius of 10 centimeters, which was divided into three roughly equal sectors and kept opening and closing;
Then put a row of mosaics on top, each mosaic grid is as big as two centimeters by two centimeters...
"Teacher, look, I can't see clearly like this! I can barely see the outline, is there any incomplete opening and closing, what is the shape, and are there any growths on it? I can't see clearly at all!"
The Lord of Thunder's face became more solemn little by little. Gretel's request cannot be said to be unreasonable. It can even be said that in order to achieve a good enough therapeutic effect, it must be seen so clearly;
The problem is that with his current detection accuracy, the side length of the grid he created even exceeds 5 millimeters. If this is shrunk to 2 millimeters, the energy he needs to expend in one cast is more than 10 times!
"Let me think about it." He whispered softly: "Let me think about it..."
He lowered his eyes and thought attentively. Beside him, Gretel turned his left foot to his right foot, and his right foot to his left foot. He waited nervously for a while and whispered:
"Teacher...lower the temperature..."
As he spoke, he held a liquid nitrogen test tube between his fingertips and shook it at the teacher. He didn't understand anything else, but the nuclear magnetic resonance machine in the previous life used liquid nitrogen and liquid helium to cool down and achieve the superconducting effect.
Well, the main reason is that liquid helium is more expensive and the magnets are immersed in it; liquid nitrogen is cheaper and it is kept outside to keep it warm~~~
What if some hospital is unlucky and someone has a wheelchair or something vital gets sucked into the machine and has to be degaussed to remove the thing? Releasing the liquid nitrogen and liquid helium is a big project.
!
Although he really didn't know whether liquid nitrogen or liquid helium was needed to rub electricity in the void, but cooling down, cooling down to extremely low temperatures seemed to be an idea?
Um?
The Lord of Thunder glanced at him sideways. Lowering the temperature can increase the power of lightning, which he has known for a long time. Starting from this point, it is possible to increase the strength of the magnetic field, and he has also thought about it;
But the problem is that this path, in his plan, ranks fifth...sixth...eighth to try! Why is this kid talking so fast!
However, since the little guy said it, he brought it to the first place in the queue to try, so the Lord of Thunder had nothing to do. He took a few steps out, and his figure suddenly disappeared from where he was. The next moment, he had already appeared a few steps away.
The lakeside a hundred meters away;
Then, there were layers of huge tornadoes around him, which were sucked in by him like a funnel. The clouds surged, almost covering his figure. Grete subconsciously wanted to follow him, but was grabbed by Cerela:
The silver dragon girl stared at the Lord of Thunder's figure hidden in the clouds and mist, her little face tensed up, and her whole body trembled slightly.
The power rising from the clouds and mist was condensed and unyielding, fierce and cold. Compared to her breath, and compared to the breath of the elders in the family, it was much colder and more terrifying!
Is this... a legend...
The Lord of Thunder was expressionless and silently experimented. The cold breath created by rubbing his hands indeed greatly enhanced the strength of the magnetic field. The direction this little guy mentioned in a casual sentence actually worked!
A force field wall was set up, cold liquid was condensed from the air, and lightning danced in the liquid. The consumption was only doubled, but the magnetic field was increased by more than ten times!
However, the increase in magnetic field strength does not mean that you can see things more clearly easily. The Lord of Thunder simulated it for a while and got a headache:
Improved accuracy means not only an increase in energy, but also a significant increase in required computing power.
A very simple principle. From a cube with a side length of 3 mm, 27 cubes with a side length of 1 mm can be cut out;
To increase the accuracy from 3 mm to 1 mm, the computing power required is not 27 times.
Every oscillation of a magnetic field also has a time dimension. As the magnetic field strengthens, the oscillation frequency can also increase. To find the signal he needs from the messy feedback for final imaging means processing more information...
The Lord of Thunder stood by the lake for a long time, then suddenly waved. A palm-sized river clam flew out of the water and fell into his demiplane.
Then, the Lord of Thunder lowered his eyes silently and stood like a statue by the lake.
One minute.
Two minutes.
five minutes.
fifteen minutes.
Gretel was pacing up and down, pacing up and down.
thirty minutes.
One hour.
Gretel poked his head around.
Two hours.
Gretel yawned and did not dare to go to sleep. How long did the teacher do this round of MRI...
Generally speaking, a scan takes 15 minutes to half an hour, and the emergency report can be obtained at the fastest half an hour... This is two hours! Two hours!
Has the teacher already finished scanning and is calculating the results, or has he not finished scanning yet? It’s just such a small river clam...
Can he go back to sleep and come back tomorrow morning to wait for the results? He is not a legend yet, and still needs a certain amount of sleep and meditation to maintain his mental state and spell slots!
With such a fuss in his heart, Gretel didn't dare to let him go back to sleep. The teacher was busy with his affairs, so he went back to sleep leisurely and woke up tomorrow morning...
I'm afraid I'm going to be beaten into a meat pie!
Forget it, just think of it as working overtime in the emergency department, or the patient's family waiting for news outside the clinic. Who among the closest family members can sleep at this time?
After waiting for another two hours, the Lord of Thunder finally breathed a sigh of relief and waved to Gretel.
Grete trotted over, and sure enough, there was a silent phantom hanging in front of the Lord of Thunder. Judging from the shape, it was exactly the same as the clam shell next to it.
But the outline and shape are the same. The inside of the clam shell is a mess, like a piece of black lake, and the internal structure can hardly be seen.
What mussel feet, what adductor muscles, what aorta, what intestines...
One can only make difficult guesses among the dark and light black lakes, which is a complete test of one's spatial imagination.
Gretel sighed helplessly.
It's his fault, it's his fault. The signal obtained by nuclear magnetic resonance needs to undergo Fourier transformation to produce a detailed image that doctors can understand at a glance.
So now the question comes——
Teacher, as a legendary mage, do you understand Fourier transform?
I have learned this stuff before, passed the test, and immediately forgot it. If you don’t understand, I really don’t have the confidence to explain it to you...