A medical image diagnostic apparatus according to an embodiment includes processing circuitry. The processing circuitry extracts a reference line of a region of interest included in a medical image collected from a subject. The processing circuitry sets feature points in the region of interest based on the reference line and a contour of the region of interest. The processing circuitry presents pieces of identification information for identifying the positions of the set feature points. The processing circuitry receives a contactless input for selecting a specific piece of identification information from the pieces of identification information presented in the medical image. Based on the specific piece of identification information for which the contactless input is received, the processing circuitry acquires the position of the feature point having the corresponding piece of identification information in the medical image.
