What Student Need to Know about Imaging of Respiratory System In Radio Diagnosis

The respiratory tract refers to the portion of the respiratory system that conducts air into and out of the body. It is conventionally divided into upper and lower tracts. The upper respiratory tract (URT), also known as the upper airways, is the collective term for the components of the respiratory system proximal to the trachea: • nasal cavity • pharynx o nasopharynx o oropharynx o hypopharynx • larynx Some texts include the paranasal sinuses in the upper respiratory tract as they are in direct communication with the nasal cavity, lined by a thin layer of respiratory epithelium and play a role in humidification of the inspired air and phonation. The lower respiratory tract (LRT), also known as the lower airways, is the collective term for the components of the respiratory system distal to the larynx: • tracheobronchial tree o trachea o main bronchi o bronchial tree • functional airways (distal to the terminal bronchioles) The examination most frequently perfo