According to an exemplary embodiment of the present disclosure, apparatus and method can be provided for determining information regarding a tissue or an object at or within the tissue. For example, with at least one first arrangement which is situated inside a particular organ of the body, it is possible to generate at least one electromagnetic radiation in the tissue, wherein the tissue is different from and outside of the particular organ. The particular signals that are responsive to the at least one electromagnetic radiation can be detected (e.g., possibly with at least one second arrangement), at least one characteristic of the tissue and/or information regarding the object at or in the tissue can be determined (e.g., with the second arrangement(s)).. Alternatively or in addition, the tissue can be different from and outside of the particular organ, and the first arrangement(s) can be situated inside a particular organ of the body. To that end, the can include (i) the heart, (ii) major vessels attached to the heart, (iii) coronary artery, and/or (iv) blood therein.