It's not that hard to open a hospital in another world, right?

Chapter 163 Doing experiments is spending money like water (second update)
Gretel calmed down and first recalled the principle of B-ultrasound. ——To be honest, B-ultrasound examination is a matter of the imaging department. As an emergency doctor in his previous life, he only needs to remember which symptoms should be sent for B-ultrasound, and what kind of examination should be prescribed for any suspected situation.

As for the test results?
It’s all written on the inspection sheet, and he doesn’t even need to identify the images on the sheet. It’s best if he can read it, but if he doesn’t know how to read it, the problem is not too big...

As for the principle of B-ultrasound, what is it?
It was taught in "Medical Imaging", memorized, and tested-forgot.If it wasn't for the memory enhancement that came with the travel process, he might not even be able to recall what the book said.

Hmm... Gretel slowly flipped through the "Medical Imaging" in his mind.Fortunately, Chapter 1 has it.

B-ultrasound is the use of ultrasonic waves of 1-10 MHz to propagate in human tissues. When passing through different organs and different tissues, including multi-layer interfaces between normal and diseased tissues, each interface is different due to the acoustic impedance of the media on both sides. Different degrees of reflection and/or scattering.

The echoes formed by these reflections or scattering, as well as the attenuation information of different tissues that the ultrasound passes through during propagation, are received, amplified and processed, and displayed on the screen as images or waveforms to form an acoustic image.

Gretel recalled the echo magic. "Display on the screen as an image or waveform", this step is directly completed by the magician's meditation environment: it is equivalent to the magician temporarily growing a pair of "eyes" of bats, which can directly "see" the shape drawn by the echo.

Thankfully, meditation can take care of the "seeing" process.Otherwise, with this technological development similar to the medieval environment, he really doesn't know where to get a display screen, let alone a computer...

Then, the next step is to "send ultrasonic waves"-by the way, you have to find a couplant.

In the past, when B-ultrasound examinations were performed, couplant was applied to the patient's skin, and then the ultrasound probe was pressed against the skin.Without this thing to remove the air around the ultrasound probe, medical high-frequency ultrasound cannot be transmitted into human tissues at all...

"Bernard! Come and shave the rabbit!"

Gretel yelled.The Savage came at a gallop, and Gretel, leaving him the work, turned to look for a substitute for the couplant.

Water... no.Not viscous enough, it runs off in no time.

Alcohol... no.The viscosity is almost the same as water, and it is also irritating to the skin.

Aloe vera gel...it's sticky and fluid, and it seems to be okay.The problem is that it is winter, and there is nowhere to find aloe vera gel?

What about... glycerin?

Gretel looked around his lab and cried.Traveling to the present for such a long time, he has not had time to make glycerin after he is busy with this and that.

This has to be done quickly!Gretel silently added to his experimental plan and continued to search.Glycerin is out of stock, what about soybean oil?What about olive oil?What about rose oil? ...By the way, why is there rose oil in my box?
"Grete! The rabbit is shaved!"

Bernard called him from across the room.Gretel picked up two bottles of cooking oil in one hand, and several bottles of sesame oil with an unknown smell in the other hand and rushed over:

"...how did you shave it all over?"

It’s obvious that you only need to shave your stomach...Less to say a word, this rabbit is so ugly after being shaved...

But it's too late to complain now.Gretel uncorked the bottle, first poured a puddle of soybean oil on the grass rabbit's stomach—the cheapest one—and pressed his finger on the rabbit's belly.The other hand grabbed the bat through the glove, took a deep breath, took a deep breath, calmed down, and cast the magic——

Control the ultrasound from the right fingertip.Through the conduction of the coupling agent, it enters the rabbit body.

Emmmm......

Can't see clearly.

A little more force?
Still can't see clearly.The picture fed back by the ultrasonic wave is very blurry. Not only that, but the picture also includes the cage under the rabbit, the wooden cabinet under the cage, and the ground under the cabinet...

Is it the coupling agent?Gretel grabbed a rag, wiped off the soybean oil, washed it, and poured in the olive oil.The clear and bright liquid flowed in the rabbit's abdomen, seeing Gretel's eyebrows tremble, and the pain in the front of his chest, as if he had been severely pinched by an invisible hand.

Gretel knew that it wasn't myocardial ischemia causing angina pectoris, he just felt distressed, distressed...

money!

This is all money!
Olive oil is so precious!Such a small bottle cannot be bought with a single gold coin!
Hey, olive oil is used as a couplant, and the effect seems to be better than soybean oil, and the ultrasonic feedback is not so noisy.It seems that I have heard somewhere that some liquids do not have high sound conductivity, and also contain other impurities that hinder the transmission of sound waves, so they cannot be used as coupling agents.Sure enough, it is right to try a few more...

However, the clarity of olive oil is still too far from Gretel's requirements.Gretel endured the distress, and tried sweet almond oil, almond oil, rose oil...

2 gold coins a bottle!
5 gold coins a bottle!
12 gold coins a bottle!
Jingle, jingle, jingle...

Those bubbling out of the bottle are not couplant substitutes, it's all money!
Gretel's face twisted and twisted.

Fortunately, most of those oils were not bought by him: some were spoils of war, some were applied to the Magic Council in the name of experimental materials, and some were placed here by magicians who came to help.After finishing the experiment, as soon as others left, all these materials belonged to him.

If this is done immediately, Gretel will go bankrupt immediately.

After a round of experiments, sweet almond oil is still the best, but I can only "see" the rabbit's bones vaguely.Gretel sighed:

There is no way for him to improve the technical path of couplant, or else... make the ultrasonic waves bigger?
Tweaked spell models!

Increase output power!

No, the rabbit vomited blood...

Gretel was bewildered.He stopped casting the magic and told Bernard to let go of his hands.The grass rabbit was lying under the cage, with its four legs kicking and kicking, trying to get up, but it had no strength.Blood gushed out of its mouth, Gretel looked at it for a while, the rabbit tilted its head to the side and lost its breath.

died?

Ultrasonic power is too great, killed the rabbit?

Most of the blood coming out of the mouth is upper gastrointestinal hemorrhage... Wait, is it the fault of the B-ultrasound?
Never mind, let's dissect it.Gretel carried the dead rabbit to the operating table, geared up, and began to operate the knife.Bernard followed him step by step, handed him the knife and scissors, watched Gretel cut the fur and bone, and suddenly asked:
"So we're... having roast rabbit tonight?"

Gretel: "..."

so?
what so?
So I did the B-ultrasound experiment to get you rabbits to eat?
After I find out the cause of death, I will think about whether to eat or not!
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(End of this chapter)