echo_time

5 ms·

1.
by echo_time 10mo ago
This is fantastic - but I encountered something strange. I was searching `ghostty per window shader` and your site came up as the first hit. Excellent - however, this was the text under the link: Fun with Ghostty Shaders 22 Feb 2025 — Ghost
2.
by echo_time 1y ago
Impressive turn around in general, that certainly instills some confidence! It does look great, so kudos!
3.
by echo_time 1y ago
This looks incredible, and its obvious that a lot of work has been done, but in exploring it I notice a lot of things that make me hesitate to spend the money! First, in the section "Expressions are flashcards on steroids", the fl
4.
by echo_time 1y ago
Note for Firefox users - view the page in Chrome to see more of what they are talking about. I was very confused by some of the images, and it was a world of difference when I tried again in Chrome. Things began to make a lot more sense - i
5.
by echo_time 3y ago
Shame about the "research use only" limitation. That performance really puts local use in range for all sorts of devices - and with (allegedly) great performance! The future is bright/terrifying.
6.
by echo_time 3y ago
Funnily enough the Example Page 1 is wrong. Rendering du^n as du^*, and then nu^n-1 as nw^*-1. It is impressive but...it really feels like those are the details that really really matter.
7.
by echo_time 3y ago
In some ways, absolutely not - precision is a huge challenge with an indirect method like fMRI - but this example is over a decade old now: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3130346/ Fig4 shows the
8.
by echo_time 3y ago
If the images are in DICOM format, which is common, then dcm2niix should be able to convert them https://github.com/rordenlab/dcm2niix I think it can handle a few other formats as well. Once they are .nii(.gz) files, t
9.
by echo_time 3y ago
They are human size research (and now clinical, albeit limited so far) magnets, so big enough, think about 60cm. It's an elbow rubbing environment, but sufficient for even somewhat large adults. The animals magnets are super tiny, of c
10.
by echo_time 3y ago
Clinical scanners often use 2mm isotropic voxels, or even 3. Clinical usage is almost a bad reference point!. Research MRI at ultra high field (7T) goes to 0.8mm isotropic and below (0.5 or 0.6 is possible).
11.
by echo_time 3y ago
7T is already regularly used for human research, and approval for human usage has been granted for 10.5T and I believe for 11.7T (though I'm not sure how many images they've gotten out of that yet). Yes it is incredibly expensive,
12.
by echo_time 3y ago
This is incorrect - all of the protons align along the static (the strong 1.5, 3 , 9.4 etc Tesla) field, some point one way, and some the other - but they have all shifted so that they line up. The excite portion is a separate step, distinc