Method and apparatus for obtaining a high resolution image

An imaging method capable of obtaining 2-dimensional high-resolution image for a controllable rotating target during a short image processing time without degrading the quality of the image, wherein the imaging method is employed in an imaging apparatus comprising means for controlling the imaging apparatus and processing a signal reflected from the target, means for generating a reference signal, means for transmitting and receiving the reference signal and means for rotating the target, comprising the steps of:

• a) acquiring initial information concerning the imaging apparatus and the target;
• b) calculating parameters for use in rotating the target, the parameters including a rotational increment of the rotating means and a total rotation angle thereof;
• c) computing a start frequency ƒsk and a step frequency δƒk;
• d) measuring data for the target to store them based on the values obtained in the steps a) to c);
• e) determining whether or not the step d) is completed;
• f) if the determination result is negative, repeating the steps a) to e);
• and, if otherwise, obtaining the 2-dimensional high-resolution image by using an image reconstruction algorithm;
• and
• g) displaying the 2-dimensional high-resolution image,
• wherein the image reconstruction algorithm applies a Fast Fourier transform (FFT) process to the measured data to reconstruct the 2-dimesional high-resolution image without interpolation.