This course provides 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. Student actively participates 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 class. Prerequisites: CVT 106, BIO 101, Must be taken with CVT 107 and BIO 102 if taken in Semester 2.