1. A method for enhancing a needle in a medical diagnostic ultrasound image, the method comprising: acquiring first and second ultrasound frames of data with first and second different beam orientations, respectively, the first and second ultrasound frames of data representing a patient and a needle within the patient; detecting needle candidates in the first ultrasound frame of data; detecting needle candidates in the second ultrasound frame of data; associating the needle candidates in the first ultrasound frame of data with the needle candidates in the second ultrasound frame of data; displaying an image of the patient, the image having an enhanced needle based on the associating; and adapting an ultrasound imaging parameter based on the needle.