Slide 7 of 15
Notes:
Detector array design affects several aspects of scanner performance.
The adaptive arrays have fewer detector elements, therefore fewer gaps, and are potentially more efficient. Fixed matrix designs, however, can be adapted more easily to scanning more than 4 slices per rotation.
The Toshiba scanner has the longest array, which, together with its high heat capacity anode, is advantageous when considering the z-axis coverage achievable in one helical run.
The GE design currently limits them to a minimum slice width of 1.25mm, whereas the other manufacturers offer 0.5mm. GE are planning to offer slice widths of < 1mm; this will be achieved by software (rather than smaller detector elements), therefore, will be available in helical mode only.
