Fig. 2.

Components of the detector assembly. a Multi-pinhole collimator covering the heart volume. b Pinhole collimation and miniaturization of the detector enable proximity to the heart with minification of the heart image, utilizing most of the detector surface to cover the heart projection. c A 4 × 4 cm CZT detector size as compared to a classic photomultiplier tube of a conventional SPECT camera. d The detector box with its rear electronic connections. e The CZT is pixelated featuring intrinsic resolution of about 2.5 mm irrespective of photon energy