In the majority of the cases in which the variability-based thresholds delays the occurrence of the five year bleaching frequency, the delay is by less than 10 years.
Modify the injection protocol and post-threshold delay based on these factors.
Post-threshold delay needs to be increased when using a faster scanner to better opacify the non target vessels.
For example, for a pulmonary embolus study, we use a post-threshold delay of at least 5 s on a 64 slice scanner, but a longer delay of 8 s is used on a 256 or a dual source scanner.
It can be seen that at the uplink, the performance of EDCA and the proposed mechanism is almost similar, while at the downlink, the proposed mechanism experiences a bit more delay than EDCA; however that delay is still much less than the threshold delay value of 150 ms recommended in ITU-T G.114 [37].
The consequences of delays to diagnosis are analyzed and the existence of a threshold delay value is demonstrated.
We selected a reaction as a valid response when it was the first orientation (GO, HO or FR) consecutive to the sound diffusion, and when it occurred within a threshold delay of 1.0 s (GO), 1.4 s (HO) and 1.4 s (FR) for the monkeys and 1.2 s (GO), 1.4 s (HO) and 1.2 s (FR) for the girls.
As some previous studies have used a 90-day threshold delay for chemotherapy [ 7, 22– 24], we performed additional analyses with a 90-day threshold for chemotherapy.
A threshold of 60 days was used as the acceptable threshold delay for initiating chemotherapy, based on evidence from three recently published papers.
The duration of the first injection phase was determined in a similar way to that for single phase CTA, and was calculated from the duration of CT data acquisition plus 8 s, the duration of the post-threshold delay for bolus triggering.
