Expected headings
"Helpful associated findings"
"Intraperitoneal free air will collect beneath the parietal peritoneum and create an abnormally reflective air-soft tissue interface; the resultant incongruity in acoustic impedance results in scattering; free air tends to distribute in a smooth, linear fashion and may act as a specular reflector. The corresponding "stripe" of overlying parietal peritoneum will thus demonstrate increased echogenicity 3."
"Intraperitoneal free air will collect beneath the parietal peritoneum and create an abnormally reflective air-soft tissue interface; the resultant incongruity in acoustic impedance results in scattering; free air tends to distribute in a smooth, linear fashion and may act as a specular reflector. The corresponding "stripe" of overlying parietal peritoneum will thus demonstrate increased echogenicity 3."