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J.C.

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Posts posted by J.C.

  1. Ok, here's the animation I made for my thesis defense. It shows the main coils of a Magnetic Resonance Imaging Scanner and then continues on to the process of alignment of the spins, excitation and readout of the resulting signal. I've attached the POV-Ray scripts, in the off chance someone actually still uses POV-Ray and wants to check out the code.

     

    WWwH7Zt-vhU

     

     

    A little explanation on MRI: our body is composed primarily of water. The hydrogen nuclei in it can be thought of as small magnets. It you put your body inside a constant magnetic field (like the one generated by the huge superconductive coil you can see in the video) they all align. Then, if you introduce a radio frequency pulse at just the right frequency (known as the resonance frequency), they start to spin around. Then, if you cut the RF pulse, the nuclei slowly align themselves back with the main field. During this process, if you have a coil next to them, you see a changing magnetic field. That signal, along with some fancy math, allow to build the images doctors use.

     

  2. Dr House is too ugly to be Freeman! You male audience, you have no idea about that, but I have!

    This poll seems to hint otherwise. I doubt those are all male votes ;)

     

    How about the guy from Breaking Bad? He seems pretty Freeman-ish to me (albeit on super pissed-off bad-ass mode)

     

    1314819035379_BreakingBad_2048x1024_590_295-1.jpg

     

    And without glasses and shaved, he looks like this.

     

    BryanCranston1-1.jpg

  3. I used to be a pretty decent programmer back in college: mainly C, a lot of Matlab and POV-Ray scripts (I have a mean animation of the basic components of an MRI machine)... but it's been at least 8 years since I wrote a single line of code. I'll check my files later, see if there's anything interesting.

     

    ( I also used to write some cool Atari BASIC programs... but they are now lost in the mist of time :lol:)

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