This course provides students with an understanding of the use of duplex ultrasound to investigate the extra-cranial circulation of the brain and arterial and venous circulation of the upper and lower extremities. Normal and pathological conditions are discussed in correlation with physical and clinical findings. Students actively participate in laboratory scanning in the student lab. Lab sessions include experience and competency testing in vascular sonography. Case studies and imaging critique are addressed throughout the semester. Prerequisites: DMS 101, DMS 102, DMS 105.  Note: For students starting the DMS program effective Fall 2016, the Prerequisites are: DMS 101, DMS 102, DMS 105, ENG 101.