An Antenna-Theory Method for Modeling High-Frequency RF Coils: A Segmented Birdcage Example

Figure 4

Amplitude of the clockwise component of the circularly polarized RF field in the central transverse planes for the single-segmented birdcage models with length (a) 2.5λ, (b) 10.5λ, (c) 20.5λ, and (d) 100.5λ. In (e), the normalized field variation across the central transverse plane along 𝑥-axis is shown.

(a)

(b)

(c)

(d)

(e)