弥漫性肺疾患是指以双肺出现散发性小阴影为特点的一类疾病,包括以肺实质为主或以间质为主,以及肺实质与间质混合性的疾患,其主要X线形态有颗粒状、结节状、索条状、网织状和网织结节状等阴影。由于此类疾病的病因学较为复杂,而X线学的表现又有共同之处, Diffuse lung disease refers to the occurrence of a sporadic small shadow in both lungs characterized by a class of diseases, including mainly in the lung parenchyma or interstitial-based, and pulmonary parenchyma and interstitial mixed disease, the main X-ray patterns There are granular, nodular, cable strip, mesh and mesh knit nodular shadow. As the etiology of such diseases is more complicated, and the performance of X-ray has something in common,