On the sensitivity and the resolution of microwave imaging using ART

The feasibility of using the presently available linear reconstruction techniques in microwave (MW) imaging was suggested and numerically demonstrated in a recent communication [1]. It was shown that although such techniques neglect reflection and refraction effects, they still can be used to obtain suitable MW images. This letter presents some calculated microwave images of phantoms simulating biological objects. These images were obtained using the algebraic reconstruction technique (ART) that was originally used in X-ray and ultrasound computerized tomographic imaging. The resolution and sensitivity of the microwave images are examined and suggestions for improvements are discussed.