Day 15 Observations
Some of our chicks, from the batch started the week
before the MRI chicks, have hatched overnight !
More are hatching right now. Watch here or on
"Today's News" for video or photos.
Also coming soon - the sounds of the MRI machine.
Today's MRIs are similar to yesterday's, although
the pictures are not as clear. The chick seems to
be more or less in the same position, head on the
left, in the front view. Perhaps it is now too
cramped in the egg for it to turn around.
If you have a better image, please post it on
Scratchings. I didn't have time to look at all of
One noticeable feature is the pair of dark bars,
one on either side of the body (visible in
yesterday's side views). You can see them in frame
102 today. What are these ? We thought they might
be the lungs - collapsed at present since they are
not in use - but it seems that bird lungs are
different from mammals, and may not actually be
paired. Or they might be bones - the equivalent of
Another feature seems to be the heart, in frame
107. The bright spots above and below it are
signals from the blood in the ventricle. These
spots are in the wrong places because they are
moving too rapidly. Notice that each spot has the
same shape. The aorta or vena cava is visible to
the right of the heart, also with several displaced
As noted yesterday, the egg compartments have
changed a lot since last week. However, today, we
were able to compare T1 and T2 images and determine
that the smaller compartment near the small end of
the egg (e.g. CD-56 in frame 112) is probably the
remains of the yolk (the contrast appearance is
similar to the yolk in last week's images.
MRI: Front views.
Here are some front views. Positions (offset) are