Conversation: The conversation between human and AI assistant.
[|Human|] My 82 year old father called me Sunday night at around 11 pm... He said he had fallen and couldnt get up,  His words were slurred.. I got to his apartment and the paramedics were getting ready to take him to the hospital..  The ER doctor told me and also showed me his CT scan and said he had a mass on the left side middle part of brain.. They took him to a larger city and the doctors there have repeated the CT and did an MRI and they say there is no mass... What could it be and how did this mass disappear so quickly ??  Any help is greatly appreciated.
[|AI|]  I am not able to understand how paramedics could've shown you a CT scan of his head after he had fallen. Was that a CT scan that had already been done which your father just happened to show the paramedics because they certainly couldn gotten one on site. I would say that the hospital and doctors there who repeated the studies and got even an MRI which is highly sensitive for mass lesions are correct when they say there is no mass. I would have to say that the paramedics' interpretation was wrong. That's why paramedics should refrain from doing things they are not trained to do.