Article Figures & Data
Figures
- FIG 1.
Illustration of FOV change according to the head flexion angle: (A) neutral position, (B) flexion position, and (C) extension position. The dotted line represents the line from the petrous apex to the lens, while the curved arrow indicates the flexion angle, defined as the angle between the line from the petrous apex to the lens and the horizontal line of the FOV, presented as a white box. In the neutral position (A), the lens was located at the border of the FOV. In the flexion position (B), the lens shifted into the FOV. However, the lens was outside of the FOV and significantly further from the FOV in the extended position (C).
- FIG 2.
Scatterplots illustrating the relationships between (A) head flexion angle and lens dose, (B) AP diameter of the head and lens dose, and (C) head flexion angle and AP diameter of the head.
- FIG 3.
Illustration of head position changes relative to the AP diameter of the head and the corresponding body shape: (A) a flexion position for an individual with a small head and body size, (B) a neutral position for an individual with an average-sized head and body, and (C) an extension position for an individual with a large head and body.
Tables
Baseline characteristics of the patients (n = 20)
Characteristics Values Age, years 62.3 ± 9.9 Female sex 12 (60.0) AP diameter of the head, mm 168.3 ± 6.8 Flexion angle of the head, degrees 6.0 ± 7.8 Radiation dose to the lens, mGya,b Right eye 3.30 ± 0.60 Left eye 9.18 ± 3.31 Kerma area product, Gy·cm² 21.6 ± 6.0 AK, mGy 134.0 ± 32.1
Jump to section
Related Articles
Cited By...
- No citing articles found.