کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1760460 | 1019594 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Signal of Interest Selection Standard for Ultrasonic Backscatter in Cancellous Bone Evaluation
ترجمه فارسی عنوان
سیگنال انتخاب استاندارد بهره برای بازتاب التراسونیک در ارزیابی استخوان استخوانی
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کلمات کلیدی
بسکتبال التراسونیک، پوکی استخوان، استخوان اسفنجی، سیگنال مورد علاقه، کسر حجم استخوان،
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
چکیده انگلیسی
The aim of this study was to examine the effect of the backscattered signal of interest (SOI) on ultrasonic cancellous bone evaluation. In vitro backscatter measurements were performed using 16 bovine cancellous bone specimens and six different transducers with central frequencies of 0.5, 1, 2.25, 3.5, 5 and 10 MHz. The SOI for signal analysis was selected by a rectangular window. The delay (T1) and duration (T2) of the time window were varied, and the apparent integrated backscatter (AIB) and its correlation to bone volume fraction (BV/TV) were calculated. The results indicate that in addition to affecting the measured value of AIB, the SOI influences the observed correlation between AIB and BV/TV. Strong positive correlations were observed for short T1 (0.5 MHz: â¤6 μs, 1 MHz: â¤3 μs, 2.25 and 3.5 MHz: â¤2 μs, 5 and 10 MHz: â¤1 μs). However, strong negative correlations were observed when T1 was long (0.5 MHz: >9 μs, 1 MHz: >7 μs, 2.25 and 3.5 MHz: >3 μs, 5 and 10 MHz: >2 μs). The T2 value, especially low values (â¤3 μs), also influenced the correlation coefficients. Positive correlations were more commonly observed at lower frequencies (i.e., 0.5-1 MHz), whereas negative correlations were more common at higher frequencies (i.e., 2.25-10 MHz). An explicit standard for in vitro SOI selection and cancellous bone assessment was proposed for a broad frequency range (0.5-10 MHz). Current conflicting findings are explained, and constructive suggestions for ultrasonic backscatter cancellous bone evaluation are provided.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 41, Issue 10, October 2015, Pages 2714-2721
Journal: Ultrasound in Medicine & Biology - Volume 41, Issue 10, October 2015, Pages 2714-2721
نویسندگان
Chengcheng Liu, Tao Tang, Feng Xu, Dean Ta, Mami Matsukawa, Bo Hu, Weiqi Wang,