What Is Second Generation Of CT Scan ?
The second generation CT scan also rotate / translate system. The 30 detector are used in second generation. This increased the utilization of the x-ray beam by 30
times, compared with the single detector used per slice in first-generation systems. A relatively narrow fan angle of 10 degrees was used. In principle, a reduction in
scan time of about 30-fold could be expected. It takes 18 sec per slice scan. It takes 15 times faster than the first generation CT scan scan time.
Advantage:-
1) The second generation of ct scan is 15 times faster than the first generation CT scan.
Disadvantage:-
1) Water bath acted as a bolus.
2)The NaI detector had a significant amount of after glow.
3) NaI hygroscopic.
4) The second generation CT scan increase more scattered radiation as compared to First generation of ct scan.
5) Complex mechanical motion of translate – rotate.
