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The linear transducer prevents visualization of deeper structures, but allows a high resolution evaluation of the soft tissues and measurement of the depth of the effusion. In this case, the effusion can be seen to be very shallow at the location selected, with 2.1 cm of tissue and only 1-2 cm of free fluid. This effusion would be considered high risk for thoracentesis, and real-time guidance should be considered if the tap is indicated.