تحقیق روش های تحلیل سیگنال قلب

توضیحات

تحقیق روش های تحلیل سیگنال قلب

چکيده

سيگنال هايي كه توسط ارگان هاي بدن توليد مي شوند با هم ديگر مخلوط شده يا تحت تاثير نويز قرار مي گيرند. منظور از پردازش سيگنال هاي حياتي جدا كردن سيگنال  مورد نظر از سيگنال هاي در هم آميخته و نويز دار و سپس استخراج پارامترهاي مفيد سيگنال است. اين پارامترها براي تشخيص پزشكي به كار برده مي شوند. در این تحقیق تلاش داریم تا به بررسی روش های موجود در زمینه تحلیلی سیگنال قلب بپردازیم و همچنین پس از آن به بررسی یکی از محبوبترین روش های آنالیز سیگنال قلب یعنی آنالیز موجک پرداختیم. 

مقدمه

سيگنال تابعي از يك يا چند متغير مستقل است كه اطلاعاتي را در مورد يك پديدة فيزيكي يا بيولوژيكي در بردارد. موجودات زنده از سلول گرفته تا ارگان هاي بدن، سيگنال هايي با منشاء بيولوژيكي توليد مي كنند. اين سيگنا ل ها به صورت الكتريكي، مكانيكي يا شيميايي اند. سيگنال هاي الكتريكي نتيجة دپلاريزاسيون سلول هاي عصبي يا ماهيچة قلبي اند. صداي توليد شده توسط دريچه هاي قلب نمونه اي از سيگنال هاي مكانيكي است يا PCO2  خون، سيگنال شيميايي است. اين سيگنال هاي بيولوژيكي يا سيگنال هاي حياتي براي تشخيص پزشكي و تحقيقات زيست- پزشكي مورد استفاده قرار مي گيرند.

فهرست مطالب تحقیق روش های تحلیل سیگنال قلب

• فصل 1: کلیات تحقیق.. 8
• 1-1- مقدمه. 8
• 1-2- بیان مسئله. 8
• 1-3- اهمیت و ضرورت مسئله. 10
• 1-4- اصطلاحات و تعاریف… 10
• فصل 2: مروری بر منابع. 12
• 2-1- استخراج ویژگی های سیگنال  ECGقلب… 12
• 2-2- مرحله پیش پردازش…. 13
• 2-3- مرحله تشخیص QRS.. 14
• 2-4- استخراج ویژگی و طبقه بندی… 14
• فصل 3: روش تحقیق.. 17
• 3-1- مقدمه. 17
• 3-2- روش تحقیق… 17
• 3-3- قلمرو تحقیق… 17
• 3-4- روشهای گردآوری اطلاعات… 18
• 3-5- فرآیند اجرایی تحقیق… 18
• 3-6- محدودیتهای تحقیق… 18
• فصل 4: نتايج و تفسير آنها 21
• 4-1- مقدمه. 21
• 4-2- آنالیز موجک (Wavelet Analysis) 21
• 4-3- تبدیل موجک ( Wavelet Transform ). 23
• 4-3-1- تبدیل.. 23
• 4-3-2- آنالیز چند رزولوشنه: 24
• 4-3-3- تبدیل ویولت پیوسته: 25
• 4-3-4-   رزولوشن در صفحه زمان فرکانس: 29
• 4-3-5- عکس تبدیل ویولت: 34
• 4-3-6-   گسسته سازي تبدیل ویولت پیوسته: 35
• 4-3-7- تبدیل ویولت گسسته: 38
• 4-3-8- مقایسه. 45
• فصل 5: جمع‌بندي و پيشنهادها 46
• 5-1- نتیجهگیری… 46
• 5-2- کارهای آینده. 46
• فصل 6: مراجع  48

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