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Table 2 Comparison of dosimetric parameters between the LA- and CK-based systems for 13 clinical cases

From: Noninvasive cardiac radioablation for ventricular tachycardia: dosimetric comparison between linear accelerator- and robotic CyberKnife-based radiosurgery systems

 

LA-based system

CK-based system

p-value*

Mean ± SD

Range

Mean ± SD

Range

Esophagus max, Gy

7.3 ± 4.5

2.7–14.9

6.8 ± 4.6

1.9–15.1

0.193

Stomach max, Gy

6.6 ± 5.2

0.5–12.4

7.3 ± 5.1

0.2–12.2

0.120

Spinal cord max, Gy

2.7 ± 1.2

1.3–4.7

2.5 ± 0.8

1.2–4.0

0.346

Trachea/large bronchus, Gy

2.5 ± 3.8

0.3–12.2

2.4 ± 3.0

0.2–9.4

0.927

Lung V7, cm3

51.2 ± 51.3

5.2–185.1

47.2 ± 56.5

2.3–193.2

0.263

(Heart–PTV) V16, cm3

13.6 ± 3.5

7.7–20.5

13.9 ± 6.0

4.7–25.4

0.765

(Heart–PTV) mean dose, Gy

3.3 ± 1.2

1.8–6.1

2.6 ± 0.8

1.7–4.9

0.282

Coronary artery max, Gy

20.0 ± 5.2

8.4–26.3

19.6 ± 7.0

7.5–28.5

0.633

  1. CK CyberKnife, LA linear accelerator; max, maximal dose, PTV planning target volume, SD standard deviation, V7 volume (cm3) receiving ≥ 7 Gy, V16 volume (cm3) receiving ≥ 16 Gy
  2. *Significance is tested using the paired-sample t-test, with p < 0.05 indicating statistical significance
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Radiation Oncology

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