DIGITAL RESTORATION OF ULTRASONIC IMAGES.

Axial deconvolution of ultrasonic A-scans was performed by means of a digital signal processing technique. The method uses optimal data fitting techniques based on a new linear programming algorithm that minimizes the L1 norm of the measurement error. The processing was applied to RF data of test targets recorded with a 10-MHz ophthalmic imaging system. An impulse response function was obtained from a line target in a water bath. The results of the experiments show a dramatic improvement in image resolution and suggest applications in ophthalmoscopy and biometry.