Chapter 1376 Lord of Thunder, Do You Know Fourier Transform?

The Lord of Thunder glared at Gretel.

Gretel looked up at the Lord of Thunder.

Wink, wink, wink sweetly.

"Teacher~~~Look at this heart valve, you really can't see clearly~~~"

The amount of sugar in the voice definitely tipped over the honeycomb and doubled the sugar in the honey. The Lord of Thunder couldn't help but want to frown. If he were elsewhere, he would have scolded:

You're such an adult, still acting like a spoiled brat? You are already a fourteenth-level high-level mage, not those fourth-level guys who just left school and ran around everywhere!

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 longingly, and the silver dragon girl looked at him longingly;

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, 18, or even 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 tell the difference between 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 a blurry image. It was not clear where the eyes, the skull, and the brain were.

But now, he can finally 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 the heart? Sometimes it's open, sometimes it's closed. When it's open, the blood flow can pass through, but when it's closed, the blood flow can't pass through?

Do I need to see this clearly for surgery?

"Of course you do!" Gretel proudly held out his chest. 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;

Grete opened the record book and flicked his fingers. A secret eye passed over the pig's ear, and the numbers on the ear tag were clearly displayed. Grete flipped through the record book following the numbers on the ear tag:

"No. 51... No. 51 is infundibulum and pulmonary valve stenosis, combined with pulmonary valve and 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 still needs to be improved?"

"Keep improving!" Gretel nodded firmly. In later generations of nuclear magnetic resonance, before he traveled through time, there were already 7T machines with a resolution of 0.5 mm;

The commonly used commercial version in top tertiary hospitals, the 3.0T 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 1.5T NMR!

Teacher, you are a legend, you cannot be inferior to a 1.5T 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!"

Talking and gesticulating. First, use light and shadow to outline something with a radius of 10 centimeters, divided into three roughly equal fan shapes, which are constantly 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, whether it's not fully opened and closed, what shape it is, whether there are any growths on it, I can't see clearly at all!"

The Lord of Thunder's expression became serious 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 length of the grid even exceeds 5 millimeters. This has to be shrunk to a size of 2 millimeters, and the energy he needs to spend to cast a spell is more than 10 times!

"Let me think about it." He whispered softly: "Let me think about it..."

He lowered his eyes and thought deeply. Next to him, Grete's left foot turned to his right foot, and his right foot turned to his left foot. After waiting nervously for a long time, he 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 magnet is immersed in it; liquid nitrogen is cheaper and it is kept warm outside~~~

In the unlikely event that a hospital is unlucky and someone/has a wheelchair/something vital is sucked into the machine, it 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 lowering the temperature, lowering the temperature, and lowering the temperature to extremely low temperatures seemed to be an idea?

Um?

The Lord of Thunder glanced sideways at him. Lowering the temperature can increase the power of lightning, he has known this for a long time. Starting from this point, it would be possible to increase the strength of the magnetic field, and he had also thought about it;

But the problem is that this path, in his plan, ranks fifth...sixth...eighth to try! This kid, why is he so quick to talk?

However, since the little guy said it, it is okay for the Lord of Thunder to put it first in the queue to try. He took a few steps outside and suddenly disappeared from where he was. The next moment, he appeared at the lakeside a few hundred meters away.

Then, there were layers of huge tornadoes around him, which were sucked into 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 figure of the Lord of Thunder hidden in the clouds, her little face tensed up, and her whole body trembled slightly.

The power rising from the clouds and mist was condensed but not emitted, fierce and cold. Compared to her breath, 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 experimented silently. The icy cold breath created by rubbing it with hands indeed greatly enhanced the strength of the magnetic field. The direction this little guy mentioned casually turned out to be really useful!

A force field wall was set up, cold liquid was condensed from the air, and lightning danced in the liquid. The consumption only doubled, but the magnetic field increased more than ten times!

However, increasing the strength of the magnetic field does not mean that you can see things more clearly easily. The Lord of Thunder simulated it for a while and felt a headache:

Improved accuracy means not only an increase in energy, but also a significant increase in required computing power.

A very simple truth. From a cube with a side length of 3 mm, 27 cubes with a side length of 1 mm can be cut out;

And to increase the accuracy from 3 mm to 1 mm, the computing power required is not 27 times.

Every oscillation of the 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, and finally image it, 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.

Grete walked up and down, up and down.

thirty minutes.

One hour.

Gretel poked his head around.

Two hours.

Gretel yawned and didn't dare to go to sleep. Teacher, how long did it take for this round of MRI...

Generally speaking, a scan takes 15 minutes to half an hour, and the emergency report can be obtained in half an hour at the fastest... This is two hours! Two hours!

Has the teacher finished the scan and is calculating the results, or has the scan not been completed yet? Just such a small river clam...

Could he go back to sleep and come back tomorrow morning to wait for the results? He is not a legend yet, he still needs a certain amount of sleep and meditation to maintain his mental state and spell slots!

With such a curse in his heart, he really wanted him to go back to sleep, but Grete didn't dare. 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. Among the closest family members, who 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.

Gretel trotted over, and sure enough, a silent phantom hung 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 shape is the same. The inside of the clam shell is a mess and black, and the internal structure is basically invisible.

What mussel feet, what adductor muscle, what aorta, what intestines...

One can only make difficult guesses in the dark and light black mess, 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, passed it, and immediately forgotten it. If you don’t understand, I really don’t have the confidence to explain it to you...