High-frequency micro-ultrasound functional imaging. Representative composite images of ME180 tumours growing A) in the cervix and B) i/m are shown. Positive speckle signal associated with blood flow is overlaid on top of the greyscale B mode ultrasound image. C) The tumour mean (from the 5 frames) percentage positive signal (blood flow) for each tumour are shown for ME180 tumours growing either in the cervix or i/m. Each point represents an individual tumour. The median is indicated on the graph.