مرزبندی نواحی سایه‌دار در تصاویر فراصوت داخل عروقی به کمک کانتور‌های فعال
الموضوعات :
مریم بسیج
1
(دانشگاه اصفهان)
محمدرضا یزدچی
2
(دانشگاه اصفهان)
پیمان معلم
3
(دانشگاه اصفهان)
آرش تاکی
4
(دانشگاه صنعتی مونیخ آلمان)
الکلمات المفتاحية: آستانه‌گذاری اتسو تصویربرداری فراصوت داخل عروقی تشخیص سایه کانتور‌های فعال,
ملخص المقالة :
تصویربرداری فراصوت داخل عروقی (IVUS)، به منظور دریافت اطلاعات دقیق‌تری از اندازه و جنس پلاکهای تشکیل‌شده داخل عروق کرونری نسبت به آنژیوگرافی انجام می‌شود. گاهی در این تصاویر مناطقی تاریک در پشت پلاکهای کلسیم تشکیل می‌شود که پردازش این تصاویر را مشکل می‌سازد. این مقاله به ارائه یک روش جدید جهت تشخیص و مرزبندی سایه‌ها در تصاویر IVUS می‌پردازد. در الگوریتم پیشنهادی از آستانه‌گذاری اتسو جهت شناسایی محل تشکیل سایه و از کانتور‌های فعال جهت تشخیص مرز‌ها در این ناحیه استفاده می‌شود. بر طبق آزمایش انجام‌شده روی 30 تصویر نمونه، این الگوریتم با حساسیتی برابر با 86% به درستی قادر به تشخیص مناطق سایه‌دار می‌باشد.
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