What techniques do you find most effective for visualization of rectal disease with intestinal ultrasound?

I am not sure that this is the correct use of "intestinal ultrasound". There is the transabdominal ultrasound technique that is taught to gastroenterologists who can use it at point of care for their UC and CD patients to assess the small bowel and the colon. If you want to specifically look at the rectum, that is best done with either a scope or MRI pelvis. Endoscopic ultrasound is used for lesions that are submucosal and not used for IBD unless there is concern for a nodule/mass that is deeper...

The rectum can be a bit more difficult to evaluate on abdominal intestinal ultrasound. However, if the patient has a full (or at least not empty) bladder, you can use that as your guide to look below it, and based on if they are male or female, the prostate or uterus, respectively, should be underneath the bladder, and immediately below that should be the rectum. In some cases, the rectum is easy to visualize, and you can even find good layers to assess and even use Doppler if you feel the rectu...