<prompt> Investigation of choice for detection and characterization of interstitial lung disease is: March 2012MRIChest X-rayHigh resolution CT scanVentilation perfusion scan  <response>: Ans: C i.e. High resolution CT scan Conditions and IOC MRI is IOC for superior sulcus pancoast tumour HRCT is IOC for interstitial lung disease and Bronchiectasis VQ scan is 2d IOC for pulmonary embolism CT with IV contrast is first IOC for pulmonary embolism 