Tissue-equivalent phantom can be used to evaluate dead zone. To eliminate visualization problem associated with dead zone during scanning of superficial structure, which of the following can be placed between the transducer and the skin?

Accuracy of A-mode, M-mode and B-mode displaying the depth of reflectors from the transducer is called

Comet-tail and ring-down artifacts are two types of ____ artifact.

Doppler phantoms assess all the following characteristics except:

Enhancement is a result of

Refraction and beam diverging or spreading resulting in lateral misplacement and a drop in intensity of echoes causes _____ (artifact).

Comet-tail artifact occurs ____.

Name the artifact indicated by the white and black arrows on the image below.

What is meant by the dead zone in performance testing?

Depth calibration test evaluates the ultrasound systems ability todetect weak signals