Fig 1.
Flowchart of MTR protocol.
Fig 2.
Schematic illustration of acquisition order for Np = 16.
The position of strokes corresponds to a projection angle angle(i) and numbers to a sequence number i (Eq 1). (a) Classical case of consecutive order, (b) random or arbitrary order, and (c) logarithmic order with Nprescan = 4, the same colors correspond to projections that are obtained in the same rotation.
Fig 3.
Partial reconstructions in fan geometry obtained by FBP reconstruction algorithm for different numbers of available projections and for different acquisition orders.
The maximum total number of projections Np = 512 and image size 512 × 512 is the same for all cases. Gray scale limit values are the same for every column.
Table 1.
Parameters of particular CT setups, corresponding to different areas of application.
Fig 4.
Dose and experiment time dependence from the number of projections acquired with fixed maximum projection number Np based on model Eq 3 and with parameters from Table 1.
The dose is measured in object exposition time units for convenience of comparison. (a) Dose, micro CT. (b) Time, micro CT. (c) Dose, nano CT. (d) Time, nano CT. (e) Dose, medical CT. (f) Time, medical CT. (g) Dose, cargo CT. (h) Time, cargo CT.
Table 2.
Parameters of GPU-based computing unit related to the proposed model.
Table 3.
Maximum partial reconstruction time for different reconstruction algorithms and cases.
Table 4.
Number of partial reconstruction per full acquisition for different reconstruction algorithms.
Table 5.
The results of validation experiments for real-time reconstruction.
Fig 5.
Flowchart of real-time reconstruction implementation.
Table 6.
Parameters of the experimental stand.
Fig 6.
The time required for the acquisition of a single projection and for performing a single partial reconstruction.
For reconstruction, the x-axis index is defined by the index of the first projection in the reconstruction queue. (a) Consecutive order. (b) Logarithmic order.
Fig 7.
Dose and experiment time dependence from the number of projections acquired with fixed maximum projection number Np based on model Eq 3 and with parameters from Table 1.
The dose is measured in object exposition time units for convenience of comparison. (a) Dose, EBCT. (b) Time, EBCT.