کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1760284 1019587 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using Passive Cavitation Images to Classify High-Intensity Focused Ultrasound Lesions
ترجمه فارسی عنوان
با استفاده از تصاویر حفره های منفجره برای طبقه بندی ضربه های سونوگرافی متمرکز شده با شدت بالا
کلمات کلیدی
نظارت بر تخلیه حرارتی، نقشه برداری صوتی غیرفعال، کاویتاسیون، منحنی مشخصه عملیاتی گیرنده، تخریب هدایت سونوگرافی،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم آکوستیک و فرا صوت
چکیده انگلیسی
Passive cavitation imaging provides spatially resolved monitoring of cavitation emissions. However, the diffraction limit of a linear imaging array results in relatively poor range resolution. Poor range resolution has limited prior analyses of the spatial specificity and sensitivity of passive cavitation imaging in predicting thermal lesion formation. In this study, this limitation is overcome by orienting a linear array orthogonal to the high-intensity focused ultrasound propagation direction and performing passive imaging. Fourteen lesions were formed in ex vivo bovine liver samples as a result of 1.1-MHz continuous-wave ultrasound exposure. The lesions were classified as focal, “tadpole” or pre-focal based on their shape and location. Passive cavitation images were beamformed from emissions at the fundamental, harmonic, ultraharmonic and inharmonic frequencies with an established algorithm. Using the area under a receiver operating characteristic curve (AUROC), fundamental, harmonic and ultraharmonic emissions were found to be significant predictors of lesion formation for all lesion types. For both harmonic and ultraharmonic emissions, pre-focal lesions were classified most successfully (AUROC values of 0.87 and 0.88, respectively), followed by tadpole lesions (AUROC values of 0.77 and 0.64, respectively) and focal lesions (AUROC values of 0.65 and 0.60, respectively).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 41, Issue 9, September 2015, Pages 2420-2434
نویسندگان
, , , , ,