Comment by adrian_b

You could make a pin-point camera with an array of detectors that will receive thus only the radiation coming from the direction fixed by the positions of the aperture and of the detector.

However that might not work well because the material around the pin-point aperture might not absorb sufficiently the rays coming from different directions and it cannot be made thick.

So what may work better is to make the detector array in the form of a compound arthropod eye, where each detector is at the bottom of a long tube whose walls absorb the rays coming from any other direction except its axis.

In practice, besides trying to absorb the rays coming from different directions, preventing them to reach the detector, for high-energy rays there is the alternative to use 2 or more collinear detectors for each direction (corresponding to an image pixel). A high-energy particle or photon will pass through all collinear detectors, causing simultaneous pulses at their outputs. Whenever such pulses are not simultaneous, they are discarded, because they correspond to rays coming from another direction than intended for that pixel. The accumulated count of filtered pulses per some time interval will give the luminosity of the corresponding image pixel.