An arrangement comprising: at least one first arrangement configured to provide at least one first electromagnetic radiation to an anatomical sample which is a living subject so as to be able to generate at least one acoustic wave in the anatomical sample, wherein at least one second electro-magnetic radiation is producible in the living subject based on the at least one acoustic wave; and at least one second arrangement configured to receive at least one portion of the at least one second electro-magnetic radiation so as to determine information associated with at least one portion of the anatomical sample; and wherein the at least one first electromagnetic radiation includes at least two different frequency components, wherein a first one of the at least two components has a first frequency, and a second one of the at least two components has a second frequency, and wherein a difference between the first and second frequencies is between approximately 0 and 100 GHz; at least one third arrangement configured to image the at least one portion of the anatomical sample based on data associated with the at least one second electro-magnetic radiation; at least one fourth arrangement configured to translate the at least one electro-magnetic radiation across the anatomical sample, or configured to scan or configured to scan the at least one electro-magnetic radiation across or over the anatomical sample; and wherein the at least one fourth arrangement is at least one of a catheter, an endoscope, a laparoscope, or an ophthalmic visualization device; and wherein the fourth arrangement comprises an objective lens adapted to deliver the first electromagnetic radiation to the anatomical sample and adapted for collecting said second radiation, said second radiation being a Brillouin backscattered light component from the anatomical sample due to said at least one acoustic wave. at least one first arrangement configured to provide at least one first electromagnetic radiation to an anatomical sample which is a living subject so as to be able to generate at least one acoustic wave in the anatomical sample, wherein at least one second electro-magnetic radiation is producible in the living subject based on the at least one acoustic wave; and at least one second arrangement configured to receive at least one portion of the at least one second electro-magnetic radiation so as to determine information associated with at least one portion of the anatomical sample; and wherein the at least one first electromagnetic radiation includes at least two different frequency components, wherein a first one of the at least two components has a first frequency, and a second one of the at least two components has a second frequency, and wherein a difference between the first and second frequencies is between approximately 0 and 100 GHz; at least one third arrangement configured to image the at least one portion of the anatomical sample based on data associated with the at least one second electro-magnetic radiation; at least one fourth arrangement configured to translate the at least one electro-magnetic radiation across the anatomical sample, or configured to scan or configured to scan the at least one electro-magnetic radiation across or over the anatomical sample; and wherein the at least one fourth arrangement is at least one of a catheter, an endoscope, a laparoscope, or an ophthalmic visualization device; and wherein the fourth arrangement comprises an objective lens adapted to deliver the first electromagnetic radiation to the anatomical sample and adapted for collecting said second radiation, said second radiation being a Brillouin backscattered light component from the anatomical sample due to said at least one acoustic wave. <EOS>