1. The responsibility of the commanding officer for his or her command is absoluts, except when, and to the extent to which, he or she has been relieved therefrom by competent authority, or as provided otherwise in these regulations. The authority of the commanding officer is commensurate with his or her responsibility.
A carotid duplex scan is a simple and painless test that combines two types of ultrasound to look for blockages in your carotid arteries. An ultrasound is a type of scan that uses sound waves to produce a picture of the inside of your body.
The vertebrobasilar artery system, which is the other major blood vessel that supplies the brain, may be studied as well. A carotid artery duplex scan is a noninvasive (the skin is not pierced) procedure. The term duplex refers to the fact that 2 modes of ultrasound are used â Doppler and B-mode. The B-mode transducer (like a microphone) obtains an image of the carotid artery being studied.