A swept-source optical coherence tomography, OCT, imaging system (400, 600) for imaging a region of an object, comprising: a swept light source arranged to generate a beam of light of a wavelength which varies over time; a scanning element arranged to scan the beam of light across the object; an interferometer having a sample arm and a reference arm, and arranged to generate an interference light signal during use of the swept-source OCT imaging system (400, 600) by combining light scattered by the region of the object and propagating along the sample arm, as a result of the beam being scanned across the object, with light from the beam propagating along the reference arm; a photodetector arranged to receive the interference light signal and generate an electrical signal that is indicative of the interference light signal, the electrical signal comprising frequency components spanning a frequency band, the frequency components being caused by interference of the light scattered by the region of the object and propagating along the sample arm, with the light from the beam propagating along the reference arm; a band-pass filter module arranged to generate a filtered electrical signal (S F) by band-pass filtering the electrical signal; a sample acquisition module arranged to acquire samples of the filtered electrical signal (S F); characterised by a control module arranged to set a pass band of the band pass filter module such that the band-pass filter module extracts at least some of the frequency components spanning the frequency band from the electrical signal, the control module being further arranged to set a sampling rate of the sample acquisition module such that the sample acquisition module band-pass samples the filtered electrical signal (S F) to acquire a set of samples of the filtered electrical signal (S F) for generating OCT image data representing an image of the region of the object. a swept light source arranged to generate a beam of light of a wavelength which varies over time; a scanning element arranged to scan the beam of light across the object; an interferometer having a sample arm and a reference arm, and arranged to generate an interference light signal during use of the swept-source OCT imaging system (400, 600) by combining light scattered by the region of the object and propagating along the sample arm, as a result of the beam being scanned across the object, with light from the beam propagating along the reference arm; a photodetector arranged to receive the interference light signal and generate an electrical signal that is indicative of the interference light signal, the electrical signal comprising frequency components spanning a frequency band, the frequency components being caused by interference of the light scattered by the region of the object and propagating along the sample arm, with the light from the beam propagating along the reference arm; a band-pass filter module arranged to generate a filtered electrical signal (S F) by band-pass filtering the electrical signal; a sample acquisition module arranged to acquire samples of the filtered electrical signal (S F); characterised by a control module arranged to set a pass band of the band pass filter module such that the band-pass filter module extracts at least some of the frequency components spanning the frequency band from the electrical signal, the control module being further arranged to set a sampling rate of the sample acquisition module such that the sample acquisition module band-pass samples the filtered electrical signal (S F) to acquire a set of samples of the filtered electrical signal (S F) for generating OCT image data representing an image of the region of the object.