撞傷由快速且強力的壓力造成。以前的研究，如果以醫學影像來鑑定組織情況，需有資深專業人員輔助。所以此研究的目的為希望可單純以定量參數對醫學影像進行肌肉組織的評估。用於創建肌肉撞傷的裝置使用600g的重物，懸置於30cm高處，自由落體撞擊於SD大鼠腓腸肌。透過30MHz超音波探頭掃描取得B-mode影像並分析定量參數。最後，以組織切片觀察骨骼肌的病理狀態。骨骼肌撞傷前，肌肉組織IB(integrated backscatter) 與Nakagami參數分別為20dB與0.4以上。撞傷後，因血腫在壞死肌纖維中間形成，使得IB與Nakagami統計參數下降到20dB與0.4以下。而撞傷20天後，再生肌纖維會閉合受傷的空隙，定量參數則恢復如健康的肌肉的參數值。雖然不論肌肉組織受傷前後的散射體皆是前瑞利分佈，但以IB值和Nakagami參數可以明顯區分肌肉組織撞傷前後與再生肌纖維生長的變化。所以本研究確立高頻超音波有能力透過分析定量參數，來觀察骨骼肌撞傷後的恢復情況。

Contusions caused by rapid and strong compressive force. In previous studies, if using medical image to identify the tissue, need senior professional assistance. Therefore, the objective of this study is to allow assessment of muscle tissue with quantitative parameters. The device used to create muscle contusion used 600 g of mass, suspended at 30 cm high, free fall impact on SD rats gastrocnemius muscle. The B-mode image is acquired by a 30 MHz ultrasonic transducer and the quantitative parameters are analyzed. Finally, the pathological status of skeletal muscle was observed by histological section. Before skeletal muscle contusion, IB (integrated backscatter) and Nakagami parameters of muscle tissue were above 20 dB and 0.4, respectively. After contusion, hematoma in the formation of necrotic muscle fibers in the middle, making IB and Nakagami statistical parameters down to 20dB and 0.4 below. And 20 days after the contusion, the regenerated muscle fibers will close the injured gap, quantitative parameters are restored as healthy muscle parameters. Although the scatterers during recovery of muscle tissue contusion are all pre-Rayleigh distribution, but the IB value and Nakagami parameters can significantly distinguish between muscle tissue contusion before and after and the regeneration of muscle fiber changes. Consequently, this study established the ability of high-frequency ultrasound to analyze the quantitative parameters to observe the recovery of skeletal muscle contusion.

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