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': 'Best investigation for Bronchiectasis is? \nSelect and explain. \nA. Chest X Ray, B. MRI, C. Pulmonary Function Tests, D. HRCT', 'role': 'user'}, {'content': "Answer: D \nExplanation: ANSWER: (D) HRCTREF: Harrison's Internal Medicine 17th edition chapter 252Though the chest radiograph is important in the evaluation of suspected bronchiectasis, the findings are often nonspecific. CT, especially with high-resolution images 1.0-1.5 mm thick, provides an excellent view of dilated airways. Consequently, it is now the standard technique for detecting or confirming the diagnosis of bronchiectasis.", 'role': 'assistant'}]