Commercially available optical coherence tomography systems are employed in diverse applications, including art conservation and diagnostic medicine, notably in ophthalmology and optometry where it can be used to obtain detailed images from within the retina.[citation needed] Recently, it has also begun to be used in interventional cardiology to help diagnose coronary artery disease,[1] and in dermatology to improve diagnosis.[2] A relatively recent implementation of optical coherence tomography, frequency-domain optical coherence tomography, provides advantages in the signal-to-noise ratio provided, thus permitting faster signal acquisition.