arrangements , apparatus and methods are provided according to exemplary embodiments of the present invention . in particular , at least one first electro - magnetic radiation may be received and at least one second electro - magnetic radiation within a solid angle may be forwarded to a sample . the second electro - magnetic radiation may be associated with the first electro - magnetic radiation . a plurality of third electro - magnetic radiations can be received from the sample which is associated with the second electro - magnetic radiation , and at least one portion of the third electro - magnetic radiation is provided outside a periphery of the solid angle . signals associated with each of the third electro - magnetic radiations can be simultaneously detected , with the signals being associated with information for the sample at a plurality of depths thereof . the depths can be determined using at least one of the third electro - magnetic radiations without a need to utilize another one of the third electro - magnetic radiations .