1. A device for determining the position for determining the position of the intervention tool within the subject, while the intervention tool (1) contains the first part (2) to be introduced to the subject (4), and the second part (3), which should be outside the subject (4) when the first part (2) is introduced to the subject (4), the position determining device (6) comprising: - a block (7) for providing a set of image data for providing a set of image data for an inner region of a subject (4), - a block (8, 9 , 10) ensuring the position of the instrument for determining position of the second part (3) of the intervention tool (1), - the actual image providing unit (11) for providing the actual image of the intervention tool (1) inside the subject (4), - the relative location in space unit (15) for determining the relative location in the space between the positions of the second part (3) outside the subject (4) and the first part (2) inside the subject (4) based on the actual image and the position of the second part (3), and - the position determination unit (16) for determining the position the first part (2) in the provided set of image data depending on the position of the second part (3) and the relative location in space between the first part (2) and the second part (3) .2. A device for determining the position according to claim 1, in which the unit (15) for determining the relative location in space is configured to determine the position of the distal tip (17) of the intervention tool (1) from the actual image and with the possibility of determining the relative location in space between the position of the second part (3) outside the subject (4) and the position of the first part (2)1. Устройство для определения положения для определения положения интервенционного инструмента внутри субъекта, при этом интервенционный инструмент (1) содержит первую часть (2), подлежащую введению субъекту (4), и вторую часть (3), которая должна быть снаружи субъекта (4)
