A radiation detector module including: a scintillator (62, 62', 162, 262) arranged to receive penetrating radiation, the scintillator producing second radiation responsive to the penetrating radiation; a detector array (66, 66', 166, 266) arranged to detect second radiation produced by the scintillator; electronics (72, 72', 172, 272) arranged on a side of the detector array opposite from the scintillator in a path to receive penetrating radiation that has passed through the scintillator; a radiation shield (86, 86', 100, 100', 100", 186, 210, 210', 286, 286') disposed between the detector array and the electronics, the radiation shield being substantially absorbing with respect to the penetrating radiation, characterised by the radiation shield including openings (90, 90') communicating between the detector array and the electronics; electrical feedthroughs (88, 88', 102, 102', 102", 188, 212, 212', 288, 288') passing through the radiation shield openings and electrically connecting the detector array and the electronics; wherein i) the electrical feedthroughs (88, 88', 102, 102', 102", 188, 212) are absorbing with respect to the penetrating radiation and cooperate with the radiation shield (86, 86', 100, 100', 100", 186, 210) to shield the electronics (72, 72', 172) from the penetrating radiation that has passed through the scintillator (62, 62', 162); and wherein each electrical feedthrough (88, 88', 102, 102', 102", 188) includes a widened portion (94, 94', 194) that spatially overlaps a narrower portion of the corresponding radiation shield opening (90, 90'); wherein the widened portion laterally overlaps the corresponding opening; or ii) the electrical feedthroughs are provided with a shield geometry in which an incoming direction of the penetrating radiation does not have a line-of-sight passage through the feedthroughs (212', 288). a scintillator (62, 62', 162, 262) arranged to receive penetrating radiation, the scintillator producing second radiation responsive to the penetrating radiation; a detector array (66, 66', 166, 266) arranged to detect second radiation produced by the scintillator; electronics (72, 72', 172, 272) arranged on a side of the detector array opposite from the scintillator in a path to receive penetrating radiation that has passed through the scintillator; a radiation shield (86, 86', 100, 100', 100", 186, 210, 210', 286, 286') disposed between the detector array and the electronics, the radiation shield being substantially absorbing with respect to the penetrating radiation, characterised by the radiation shield including openings (90, 90') communicating between the detector array and the electronics; electrical feedthroughs (88, 88', 102, 102', 102", 188, 212, 212', 288, 288') passing through the radiation shield openings and electrically connecting the detector array and the electronics; wherein i) the electrical feedthroughs (88, 88', 102, 102', 102", 188, 212) are absorbing with respect to the penetrating radiation and cooperate with the radiation shield (86, 86', 100, 100', 100", 186, 210) to shield the electronics (72, 72', 172) from the penetrating radiation that has passed through the scintillator (62, 62', 162); and wherein each electrical feedthrough (88, 88', 102, 102', 102", 188) includes a widened portion (94, 94', 194) that spatially overlaps a narrower portion of the corresponding radiation shield opening (90, 90'); wherein the widened portion laterally overlaps the corresponding opening; or ii) the electrical feedthroughs are provided with a shield geometry in which an incoming direction of the penetrating radiation does not have a line-of-sight passage through the feedthroughs (212', 288). i) the electrical feedthroughs (88, 88', 102, 102', 102", 188, 212) are absorbing with respect to the penetrating radiation and cooperate with the radiation shield (86, 86', 100, 100', 100", 186, 210) to shield the electronics (72, 72', 172) from the penetrating radiation that has passed through the scintillator (62, 62', 162); and wherein each electrical feedthrough (88, 88', 102, 102', 102", 188) includes a widened portion (94, 94', 194) that spatially overlaps a narrower portion of the corresponding radiation shield opening (90, 90'); wherein the widened portion laterally overlaps the corresponding opening; or ii) the electrical feedthroughs are provided with a shield geometry in which an incoming direction of the penetrating radiation does not have a line-of-sight passage through the feedthroughs (212', 288).