URMC / Department of Surgery / Specialties / Colon and Rectal Surgery / Services / Colorectal Physiology Center / Diagnostics Diagnostics Our World-Class Diagnostic Procedures 3-D ultrasound is used to create highly detailed images of the anal/rectal anatomy and any associated irregularities. Anal Manometry measures pressures generated within the sphincter complex, allowing us to assess control of the sphincter complex. Pudental Nerve Terminal Motor Latency EMG testing allows us to evaluate neurological function. Defecography is available to assess disorders that may not be evident through other diagnostic procedures.