To improve low-dose performance, shift-and-bin addition (ShiBA) imaging is proposed, leveraging the unique architecture of the MLI.
Analysis of low dose performance reveals that DQE 0) remains at 80% of its maximum value at a dose as low as 7.5x10-6 MU.
Consequently, the system dose performance was improved by asymmetric lamp positioning.
This goal was achieved by incorporating the two performance factors, namely reduction equivalent dose (RED) and system dose performance.
It was concluded that the performance parameters (higher RED and system dose performance) were improved by using asymmetric lamp positioning.
Samei, E; Lo, JY; Yoshizumi, TT; Jesneck, JL; Dobbins, JT; Floyd, CE; McAdams, HP; Ravin, CE, Comparative scatter and dose performance of slot-scan and full-field digital chest radiography systems., Radiology, vol 235 no. 3 (2005), pp. 940-949 [abs1148/radiol.2353040516] [abs].
Hollow, porous-particles added to HFA MDIs provide a mechanism for stabilizing suspensions of inhaled drugs, leading to improved physical stability, ability to formulate very low doses, consistent dose-to-dose performance, and high fine-particle fraction (FPF) [ 4, 5].
We used the differences in response rate to calculate benchmark doses based on the relative displacement from modeled zero-dose performance of the effective dose at 1% (ED 01)) and 10% (ED 10)), as determined by a second-order polynomial fit to the dose-effect function.
Because of the consistent dose-response relationship at all FR values, we used the behavioral data to calculate benchmark doses based on displacements from modeled zero-dose performance of 1% (ED 01)) and 10% (ED 10)), as determined by a quadratic fit to the dose-response function.
IQ (clinical and technical), patient dose and phantoms dose, equipment performance were evaluated with qualitative and quantitative methods.
