An image recording method for visualizing an image signal of medical diagnosis, which has the steps of: inputting the image signal of medical diagnosis; processing the image signal of medical diagnosis to get correct sharpness in visualized image by applying a frequency enhancement processing; and visualizing the image signal of medical diagnosis by conducting an ink-jetting process to form an image on a recording medium based on a processed image signal, wherein the ink-jetting process has a characteristic such that sharpness of a visualized image varies in relation with a density of the visualized image; wherein degree of enhancement in the frequency enhancement processing is determined according to a density of visualized image.