title: Experimental investigations on intracavity sonography. Part 2: Alteration of imaging by artificial alterations in the wall of isolated porcine urinary bladders.
abstract: Because the determination of the depth of urinary bladder tumors by means of intracavity sonography depends on several factors (tumor size, reflection behavior of the tumor etc.), we checked the imaging of this diagnostic technique in the isolated porcine urinary bladder under various experimental conditions. Different tissues of defined size were fixed on the inner or outer surface of the bladder wall; both the bladder mucosa and the foreign tissue were damaged thermally or by incision. The importance of a limited depth of sound penetration or of a sound shadow depending on the characteristics of the tissue under investigation was revealed; tissue types could not be distinguished unequivocally by the reflection pattern; above all, a sonographic diagnosis of the tumor was not possible in the presence of histo-pathologically detectable tissue changes due to thermal damage.
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology; D000818:Animals; D002356:Cartilage / Q000033:anatomy & histology; D066298:In Vitro Techniques; D008953:Models, Anatomic; D009132:Muscles / Q000033:anatomy & histology; D013552:Swine; D014463:Ultrasonography / Q000379:methods*; D001743:Urinary Bladder / Q000033:anatomy & histology* / Q000473:pathology