An imaging system comprising: a catheter; a sensor arrangement (21, 23, 25) comprising at least one sensor on the catheter for generating an image with the catheter, the sensor arrangement comprising a first sensor at a first location on the catheter and a second sensor at a second location on the catheter, the first location and second location being at a set distance from each other; and a processing arrangement (31, 32) communicatively coupled to the sensor arrangement and adapted to: - process a first sensor signal provided by the first sensor indicative of the first sensor in a reference location at a first point in time; - process a second sensor signal provided by the second sensor indicative of the second sensor in the reference location at a second point in time; and - determine a translation speed of the catheter from the set distance and the difference between the first point in time and the second point in time; wherein the processing arrangement is adapted to identify the reference location by matching the processed first sensor signal to the processed second sensor signal; and wherein either: - the first sensor and the second sensor are respective first and second ultrasound transducer arrays, - the at least one sensor on the catheter for generating an image comprises the first sensor and/or the second sensor, and - the processing arrangement (31, 32) is adapted to identify the reference location by matching a first ultrasound image generated from the first sensor signal to a second ultrasound image generated from the second sensor signal; or: - the first sensor and the second sensor are respective first and second pressure sensors, - the at least one sensor on the catheter for generating an image comprises an ultrasound transducer array, and - the processing arrangement (31, 32) is adapted to identify the reference location by matching a pressure profile obtained from the processed first sensor signal to a pressure profile obtained from the processed second sensor signal. a catheter; a sensor arrangement (21, 23, 25) comprising at least one sensor on the catheter for generating an image with the catheter, the sensor arrangement comprising a first sensor at a first location on the catheter and a second sensor at a second location on the catheter, the first location and second location being at a set distance from each other; and a processing arrangement (31, 32) communicatively coupled to the sensor arrangement and adapted to: - process a first sensor signal provided by the first sensor indicative of the first sensor in a reference location at a first point in time; - process a second sensor signal provided by the second sensor indicative of the second sensor in the reference location at a second point in time; and - determine a translation speed of the catheter from the set distance and the difference between the first point in time and the second point in time; - process a first sensor signal provided by the first sensor indicative of the first sensor in a reference location at a first point in time; - process a second sensor signal provided by the second sensor indicative of the second sensor in the reference location at a second point in time; and - determine a translation speed of the catheter from the set distance and the difference between the first point in time and the second point in time; wherein the processing arrangement is adapted to identify the reference location by matching the processed first sensor signal to the processed second sensor signal; and - the first sensor and the second sensor are respective first and second ultrasound transducer arrays, - the at least one sensor on the catheter for generating an image comprises the first sensor and/or the second sensor, and - the processing arrangement (31, 32) is adapted to identify the reference location by matching a first ultrasound image generated from the first sensor signal to a second ultrasound image generated from the second sensor signal; - the first sensor and the second sensor are respective first and second pressure sensors, - the at least one sensor on the catheter for generating an image comprises an ultrasound transducer array, and - the processing arrangement (31, 32) is adapted to identify the reference location by matching a pressure profile obtained from the processed first sensor signal to a pressure profile obtained from the processed second sensor signal.