medical ultrasound images evaluation

I'm working with digital filters for medical ultrasound images and I need a medical doctor who can evaluate the quality of the images in terms of the quality for diagnosis. For instance, I have a chest ultrasound image and I apply four different digital filters to the image. I need now the doctor to evaluate the images and say which one is best (if any) for diagnosis, and why. The information will be used to tune the filter performance, no report required.