A swept-source optical coherence tomography, OCT, imaging system 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 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 (S) that is indicative of the interference light signal, the electrical signal (S) 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 (S); 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 (S), 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 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 (S) that is indicative of the interference light signal, the electrical signal (S) 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 (S); 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 (S), 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 . <EOS>