1. A method for producing an image with a photoacoustic imaging system, comprising: scanning an object with a plurality of light beams produced by a source; detecting, with a detector, a plurality of acoustic signals propagating through the object, the plurality of acoustic signals produced by absorption of the plurality of light beams by the object; and generating, with processing circuitry, a reconstructed image of the object from the plurality of acoustic signals by filtered backprojection (FBP), where the FBP utilizes a weighted ramp filter applied in Fourier space, where the weighted ramp filter varies over the Fourier space and is defined as {|ωt|W}, where W ⁡ ( k , r , t ) = e - 2 ⁢ i ⁢ ⁢ k · r cos ⁡ ( c ⁢ ⁢ k ⁢ ⁢ t ) is a weighting function.