1.   But doctors are split on the duplex scanner test.

2.   But Kuller believes the results get even better with the addition of the duplex scanner.

3.   Called the ultrasonic duplex scanner, it uses high frequency ultrasound for a safe, noninvasive examination of tissues and blood.

4.   Even without the duplex scanner test, the ankle-arm test appears to be a good predictor of heart disease and death.

5.   Narrowing in the carotid arteries can be detected with an instrument called a duplex scanner.

6.   Next, an ultrasonic device called a duplex scanner can create a computer picture of the inside of the artery, indicating the degree of blockage.