Chapter 163 Doing Experiments Means Spending Money Like Water (Second Update)

Grete calmly recalled the principles of B-ultrasound first. ——To be honest, B-ultrasound examination is a matter of the imaging department. In his previous life, he was an emergency doctor. He only needs to remember which symptoms should be sent for B-ultrasound and which examination should be prescribed for any suspected situation.

As for the test results?

It’s all written on the inspection form, and he doesn’t even need to identify the images on the form himself. It’s best if he can see it, but if he can’t, the problem isn’t too big...

As for the principle of B-ultrasound, what is it?

"Medical Imaging" was taught, memorized, and tested—forgot. If it weren't for the memory enhancement that came with it during the time travel, he might not even be able to recall what the book was about.

Hmm... Grete slowly turned over the pages of "Medical Imaging" in his mind. Luckily, I got it in the first chapter.

B-ultrasound uses ultrasonic waves of 1 to 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 occurs due to the different acoustic impedance of the media on both sides. Different degrees of reflection and/or scattering.

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

Grete recalled the echo magic. This step of "displaying it as an image or waveform on the screen" is directly completed by the magician's meditation environment: it is equivalent to the magician temporarily growing a pair of bat "eyes", which can directly "see" the shape depicted by the echo.

Thankfully, meditation can take care of this process of “seeing.” Otherwise, in this environment where technological development is similar to that of the Middle Ages, he really doesn't know where to get a display screen, let alone a computer...

Then the next step is to "send out ultrasonic waves" - by the way, you also have to find a coupling agent.

In the past, when doing B-ultrasound examination, coupling agent was applied to the patient's skin, and then the ultrasound probe was pressed against the skin. Without this thing to expel the air around the ultrasound probe, medical high-frequency ultrasound cannot be transmitted into human tissue at all...

"Bernard! Come and shave the rabbit!"

Grete shouted loudly. The barbarian rushed over, and Gretel left the work to him and turned around to find a replacement for the coupling agent.

Water... no. It's not thick enough and it drains right away.

Alcohol...no. It has a consistency similar to water and is irritating to the skin.

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

What about... glycerin?

Gretel looked around his laboratory and cried. It's been such a long time since he traveled to the present time. After he was busy with this and that, he still hadn't had time to make glycerin.

This needs to be done quickly! Grete 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?

"Gretel! The rabbit hair is shaved!"

Bernard called to him from across the room. Grete 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:

"...Why did you shave it all off?"

Obviously just shaving the belly is enough... Stop saying a word, this rabbit is so ugly after being shaved...

But it's too late to complain now. Grete uncorked the bottle and first poured a puddle of soybean oil - the cheapest one - onto the rabbit's belly and pressed his fingers 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 activated the magic——

Control ultrasonic waves to be emitted from the fingertips of your right hand. Through the conduction of coupling agent, it enters the rabbit's body.

emmmm……

Can't see clearly.

More intensity?

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

Is it related to the coupling agent? Grete grabbed a rag, wiped off the soybean oil, washed it, and poured in olive oil. The clear and bright liquid flowed in the rabbit's abdomen. Grete's eyebrows twitched when he saw it, and there were bursts of pain in the front of his heart, as if he had been pinched hard by an invisible hand.

Gretel knew that this was not angina pectoris caused by myocardial ischemia, he was just distressed, distressed...

Money!

This is all money!

Olive oil is so valuable! Such a small bottle cannot be bought for a single gold coin!

Alas, using olive oil as a coupling agent seems to be better than soybean oil, and the ultrasound feedback is less noisy. I seem to have heard somewhere that some liquids do not have high sound conductivity and contain other impurities that hinder the conduction of sound waves, so they cannot be used as coupling agents. Sure enough, it is right to test a few more...

However, the clarity of olive oil is still too far from Grete's requirements. Gretel endured her heartache and tried sweet almond oil, apricot kernel oil, rose oil...

2 gold coins a bottle!

5 gold coins a bottle!

12 gold coins a bottle!

Jingle bell, jingle bell, jingle bell…

What flows out of the bottle is not a substitute for coupling agent, it is all money!

Grete's face twisted and twisted again and again.

Fortunately, most of the oil was not bought by him: some were trophies obtained after winning the battle, some were applied to the Magic Council in the name of experimental materials, and some were conveniently placed here by magicians who came to help. After completing the experiment, as soon as the others left, all the materials belonged to him.

If this was bought and made now, Grete would go bankrupt immediately.

After a round of experiments, sweet almond oil was the most effective, but I could only vaguely "see" the bones of the rabbit. Gretel sighed:

He has no way to improve the technical path of couplant. Otherwise... make the ultrasonic wave bigger?

Tweaked spell model!

Increase output power!

Oops, the rabbit vomited blood...

Grete was at a loss. He stopped releasing magic and asked Bernard to let go of his hands. The grass rabbit was lying under the cage, kicking its legs up and down, trying to get up, but it had no strength left. There was blood coming out of the mouth. Grete looked at it for a while. The rabbit tilted its head to the side and lost its breath.

died?

The ultrasonic power was too high and it killed the rabbit?

Blood coming out of the mouth is mostly caused by massive upper gastrointestinal bleeding... Wait, is the B-ultrasound the fault?

If nothing is decided, let’s do some dissection and see. Gretel carried the dead rabbit to the operating table, and began to operate. Bernard followed him step by step, handing him knives and scissors. Watching Grete cut fur and bones, he suddenly asked:

"So we're having...roasted rabbit tonight?"

Gretel: "..."

so?

What so?

So I did the B-ultrasound experiment to get rabbit food for you?

When I find out the cause of death, I will think about whether to eat or not!

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