and at least one fourth radiation associated with the second radiation it is possible to obtain a particular signal associated with at least one phase of at least one frequency component of the interference and compare the particular signal to at least one particular information further it is possible to receive at least one portion of the radiation and provide a further radiation such that the particular signal can be calibrated based on the further signal application_number US 44599006 A description it should be understood that the exemplary embodiments of systems software arrangements and methods in accordance with the present invention can be implemented in a variety of oct systems and other systems in which signals from reference arm and sample arm can be interfered with one another to produce useful signals exemplary phase resolved oct techniques are described hereafter in the context of fourier domain oct which is a category of oct which is associated with the exemplary embodiments of the ofdi system according to the present invention fourier domain oct can use an interference between two arms of an interferometer e g a sample arm and a reference arm to measure depth dependent reflections in a turbid semi turbid and or transparent medium for example an input light source is split into the reference.