A magnetic resonance imaging apparatus comprising: a housing which includes a bore where a magnetic field is applied for use in an MRI scan; a moving table, which is configured to provide for a placement of a patient and to enter the bore of the housing; a projector arranged on the moving table, which projector is configured to project an image onto an inner wall of the housing, which inner wall at least partially forms the bore of the housing; and a controller which is configured to control the projector and to transmit a video signal to the projector, wherein the projector is operable to project the image when the projector on the moving table is positioned with the moving table in the interior of the bore of the housing, CHARACTERISED IN THAT the projector comprises a light source driver which is configured to supply a stabilized constant voltage power having a constant level to a light source of the projector, the light source driver comprising: - an adjustable regulator which is configured to transform input power into a pre-set constant voltage and to output the pre-set constant voltage and which is free of inductors; - a constant voltage control circuit which is configured to receive the pre-set constant voltage output by the adjustable regulator as an input and to output the stabilized constant voltage power to the light source; and - a current sensor which is configured to sense a current which is supplied to the light source and to transmit information which relates to a magnitude of the sensed current to the constant voltage control circuit, wherein the constant voltage control circuit is configured to output the stabilized constant voltage power to the light source based on said information. a housing which includes a bore where a magnetic field is applied for use in an MRI scan; a moving table, which is configured to provide for a placement of a patient and to enter the bore of the housing; a projector arranged on the moving table, which projector is configured to project an image onto an inner wall of the housing, which inner wall at least partially forms the bore of the housing; and a controller which is configured to control the projector and to transmit a video signal to the projector, wherein the projector is operable to project the image when the projector on the moving table is positioned with the moving table in the interior of the bore of the housing, CHARACTERISED IN THAT the projector comprises a light source driver which is configured to supply a stabilized constant voltage power having a constant level to a light source of the projector, the light source driver comprising: - an adjustable regulator which is configured to transform input power into a pre-set constant voltage and to output the pre-set constant voltage and which is free of inductors; - a constant voltage control circuit which is configured to receive the pre-set constant voltage output by the adjustable regulator as an input and to output the stabilized constant voltage power to the light source; and - a current sensor which is configured to sense a current which is supplied to the light source and to transmit information which relates to a magnitude of the sensed current to the constant voltage control circuit, wherein the constant voltage control circuit is configured to output the stabilized constant voltage power to the light source based on said information. - an adjustable regulator which is configured to transform input power into a pre-set constant voltage and to output the pre-set constant voltage and which is free of inductors; - a constant voltage control circuit which is configured to receive the pre-set constant voltage output by the adjustable regulator as an input and to output the stabilized constant voltage power to the light source; and - a current sensor which is configured to sense a current which is supplied to the light source and to transmit information which relates to a magnitude of the sensed current to the constant voltage control circuit, wherein the constant voltage control circuit is configured to output the stabilized constant voltage power to the light source based on said information.