system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
In an emphysema patient with bullous lesions, which is the investigation to measure lung volume
assistant
The correct answer is  Body plethysmography is the investigation of choice for estimating lung volumes in the settings of COPD with bullous lesions ( traped air) Ref Harrison 19th edition pg 306e_6