Table 2 Analyses of the NDs vaporization profiles (1 Gy, 4 × 106 NDs/ml) vs. the measured Bragg peaks at 50 mm and 180 mm beam ranges.

From: Ultrasound-assisted carbon ion dosimetry and range measurement using injectable polymer-shelled phase-change nanodroplets: in vitro study

Range

50 mm

180 mm

NDs vap

Measured B.peak in Peak Finder software

NDs vap

Measured B.peak in Peak Finder software

Plateau-to-peak ratio @vap. begin

0.09

0.56

0.17

0.63

xend (mm)

49.7 ± 0.1

50

179.7 ± 0.1

180

xc (mm)

47.3 ± 0.1

46.9

177.2 ± 0.15

177.3

Peak area

121.7

NA

252.5

NA

FWHM (mm)

2.7 ± 0.1

NA

3.6 ± 0.2

NA

Regression coeff. R2

0.978

NA

0.976

NA

W80 (mm)

2.32 ± 0.1

2.72

2.60 ± 0.2

3.04

Shift @50% drop (mm)

0.2 ± 0.05

NA

0.3 ± 0.1

NA

  1. The results derive from a Gaussian fit function of the grayscale peaks.