YEP!! It shows how much 💩 is in your large colon aka colon, aka large intestine: ascending, transverse and descending. I don't think an X-ray gives you too much "in depth ", at least in my experience.
It can also see what is happening in your small intestine, aka small colon. Like twisting/looping.
My suggestion would be that you do NOT fast ,drink extra. You want the x-ray to hopefully see your colon at its worst. Just my opinion, if you can, don't use Miralax either for as long as you can.
I always remind the technician that the X-ray really needs to show the complete transverse, it can get partly not shown, if the technician doesn't get the X-ray high enough. On this next point, I honestly don't know if X-ray can show the redundant flexure, I found that I had one by reading the CT scan w/contrast report. I was born with this and the first time any report stated I had one, was @ 64 yrs old. My dr still didn't tell me I had one. Also, you can mention that you are concerned that you may have a redundant splenic(left side) flexure and/or redundant hepatic(right side) flexure, cuz it runs in your family. I am not trying to scare you, I am suggesting you embellish the seriousness of your constipation. These are definitely hereditary.
Again my comments are based on my personal experiences. I stayed the " nice, politically correct " patient for way way too long.
It takes a good technician, a really good radiologist that reads the X-ray and a really good doctor that knows and cares enough to agree or disagree with the radiologist report. To me, this proves the idiocy that abounds in the medical profession.
Since it sounds like this is your first abdominal X-ray....INSIST on a copy of the radiology report AND a DVD of the actual X-ray. You are entitled to request this.
SO HAPPY you had a decent stool. I lol when I read this. Something most people don't give a second thought about, but we are thrilled when we get near a normal poop. Hope your appt goes well. Shelley