6. The system according to claim 1 , wherein the comparator is configured to rank the found documents including: representing the medical report or part of the electronic medical record of the patient as a vector in a multi-dimensional space, each dimension of the multi-dimensional space corresponding to a word; representing each of the found documents as a vector in the multi-dimensional space; determining angles between the vector representing the medical record or part of the electronic medical record and the vectors representing the found documents; ranking each found document based on a closeness of angle between the vector of the found document and the vector of the medical report or part of the medical record of the patient.
6. The system according to claim 1 , wherein the comparator is configured to rank the found documents including: representing the medical report or part of the electronic medical record of the patient as a vector in a multi-dimensional space, each dimension of the multi-dimensional space corresponding to a word; representing each of the found documents as a vector in the multi-dimensional space; determining angles between the vector representing the medical record or part of the electronic medical record and the vectors representing the found documents; ranking each found document based on a closeness of angle between the vector of the found document and the vector of the medical report or part of the medical record of the patient. 7. The system according to claim 6 , further including a display device, the display device being configured to present the found documents based on the ranking.