This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Interstitial Lung Disease, Subject name: Radiology
[{'content': 'Investigation of choice for detection and characterization of interstitial lung disease is: \nSelect and explain. \nA. MRI, B. Chest X-ray, C. High resolution CT scan, D. Ventilation perfusion scan', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' ie high Resolution CT Scan (Ref: CT and MR imaging of whole body, Haaga, 4/e, p838; Sutton, 7/e, p33)HRCT is the investigation of choice for interstitial lung disease.HRCT can even delineate the lung parenchyma down to the level of the secondary pulmonary lobule.Also Remember * Principles of HRCT*Thin sections (collimation) - 1 to 2 mm.High spatial resolution reconstruction algorithm (eg the bone algorithm).Small field of view just large enough to encompass the region of interest.", 'role': 'assistant'}]