Table 1 First-order grey-scale statistics of m. supraspinatus. M. supraspinatus, dominant arm (D) and non-dominant arm (ND) for n = 9 healthy participants. Average values, (range), and [quartiles] are used for the average value of the 9 participants, whereas the mean, the variance, the skewness, the kurtosis, and the median are used to describe the distribution of the pixels in the individual ROI-images.
From: Quantitative ultrasound tissue characterization in shoulder and thigh muscles – a new approach
Grey-scale variables | Longitudinal scans | Transversal scans | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Medial | Middle | Lateral | Medial | Middle | Lateral | |||||||
D | ND | D | ND | D | ND | D | ND | D | ND | D | ND | |
Mean | 32.5 | 34.2 | 36.2 | 33.9 | 33.8 | 33.5 | 31.6 | 36.6 | 34.5 | 35.2 | 31.0 | 33.6 |
(18.7–44.2) | (22.4–48.9) | (22.5–47.6) | (27.9–39.7) | (20.0–47.3) | (25.9–45.0) | (25.5–38.5) | (27.5–43.8) | (19.4–42.6) | (27.8–44.4) | (17.6–39.0) | (22.8–47.9) | |
[28.6–38.2] | [29.6–39.1] | [32.0–40.9] | [30.4–36.5] | [27.3–39.6] | [28.1–37.7] | [27.6–37.2] | [32.4–41.4] | [30.7–40.1] | [31.2–39.5] | [27.0–35.4] | [30.8–36.8] | |
Variance | 167.0 | 165.0 | 250.2 | 252.3 | 284.9 | 293.8 | 190.3 | 191.1 | 246.7 | 256.9 | 282.7 | 258.7 |
(116.0–213.5) | (114.0–263.0) | (128.1–403.8) | (180.9–362.4) | (207.8–363.1) | (175.8–398.1) | (106.9–354.8) | (149.2–250.1) | (175.6–345.6) | (193.1–366.1) | (182.8–380.0 | (22.8–47.9) | |
[133.3–200.0] | [131.5–198.0] | [217.6–280.7] | [197.2–302.3] | [236.6–334.7] | [235.7–365.4] | [139.4–238.6] | [163.2–220.6] | [184.9–287.6] | [208.3–322.7] | [232.2–336.2] | [30.8–36.8] | |
Skewness | 1.1 | 1.0 | 1.2 | 1.4 | 1.2 | 1.3 | 1.2 | 1.2 | 1.3 | 1.4 | 1.6 | 1.3 |
(0.6–1.6) | (0.6–2.1) | (0.7–1.7) | (0.9–2.3) | (0.8–1.7) | (1.1–1.7) | (0.6–2.1) | (0.8–1.7) | (0.7–1.9) | (1.0–1.9) | (1.2–2.0) | (0.6–2.1) | |
[0.9–1.3] | [0.7–1.1] | [1.1–1.5] | [1.0–1.6] | [1.0–1.6] | [1.2–1.5] | [0.8–1.4] | [1.0–1.2] | [1.0–1.5] | [1.1–1.8] | [1.5–1.9] | [1.0–1.6] | |
Kurtosis | 2.0 | 1.6 | 2.3 | 2.6 | 1.9 | 2.3 | 2.3 | 2.1 | 2.3 | 3.1 | 3.6 | 2.4 |
(0.4–3.9) | (-0.2–7.2) | (0.4–4.7) | (0.8–6.7) | (0.4–4.3) | (1.3–3.9) | (0.5–6.1) | (0.6–5.4) | (0.4–5.3) | (0.8–5.3) | (1.0–5.8) | (-0.2–6.0) | |
[0.9–3.2] | [0.4–2.0] | [1.2–3.4] | [0.9–3.7] | [0.9–3.1] | [1.5–2.9] | [1.0–3.3] | [1.5–2.5] | [0.9–3.3] | [1.5–4.4] | [2.7–4.9] | [1.0–3.5] | |
Median | 30.4 | 32.2 | 33.3 | 30.9 | 30.1 | 29.8 | 29.3 | 34.3 | 31.3 | 31.9 | 27.0 | 30.4 |
(17.0–43.0) | (20.0–47.0) | (21.0–44.0) | (25.0–36.0) | (16.0–44.0) | (22.0–41.0) | (23.0–44.0) | (26.0–40.0) | (16.0–39.0) | (25.0–40.0) | (14.0–33.0) | (20.0–44.0) | |
[26.5–36.0] | [28.0–37.5] | [28.5–38.0] | [27.5–33.0] | [24.0–35.5] | [25.0–33.5] | [25.5–35.0] | [30.5–39.0] | [28.0–37.0] | [28.0–36.0] | [23.5–31.0] | [27.5–33.0] | |