Journal of Information Organization Sultan Almazroui, Weiji Wang, Guangfu Zhang 2 1 2012 http://www.dline.info/jio/fulltext/v1n1/4.pdf Microwave imaging technologies are widely investigated in the biomedical field where they rely on the imaging of dielectric properties of tissues. The key challenge in security applications using the microwave imaging is the image reconstruction methods adopted in order to gain clear image of illuminated objects inside human bodies or underneath clothing, Therefore in this paper we present subspace based TR-MUSIC algorithms for point targets and extended targets. The algorithm is based on the collection of the dominant response matrix reflected by targets at the transducers in homogenous background and use the MUSIC function to image it. We used the FDTD method to model the transducers and the objects to process its response matrix data in Mat lab. Clear images of metal dielectric properties have been clearly detected.