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Chụp động mạch vành bằng CT với công nghệ 256 lát cắt và liều thấp được xác định theo thời gian
Tóm tắt
Kể từ khi ra mắt các máy quét 64 lát cắt, chụp cắt lớp vi tính đa detector (MDCT) đã chứng kiến sự gia tăng đáng kể trong việc áp dụng để đánh giá không xâm lấn bệnh mạch vành, mặc dù vẫn còn lo ngại về liều tia X. Sự ra mắt gần đây của chụp động mạch vành CT dự kiến (CCTA) đã bắt đầu giải quyết những lo ngại này; tuy nhiên, khả năng ứng dụng của nó với các máy quét hiện có vẫn bị giới hạn đối với các nhóm bệnh nhân được định nghĩa bởi nhịp tim, sự biến đổi nhịp tim và chỉ số khối cơ thể (BMI). Bài báo này xem xét CCTA dự kiến, ảnh hưởng của nhịp tim và sự biến đổi nhịp tim đến chất lượng hình ảnh, và cơ sở sinh lý cho việc chọn lựa các khoảng thời gian chụp hình tối ưu. Sau đó, chúng tôi thảo luận về công nghệ 256 lát cắt và 4 tháng kinh nghiệm lâm sàng đầu tiên của chúng tôi với CCTA dự kiến 256 lát cắt. Kết quả lâm sàng ban đầu của chúng tôi cho thấy rằng, CCTA động mạch vành dự kiến với liều thấp, chất lượng cao có thể áp dụng cho bệnh nhân có nhịp tim cao hơn, BMI cao hơn và có độ nhạy kém hơn với sự biến đổi nhịp tim khi sử dụng MDCT 256 lát cắt.
Từ khóa
#chụp cắt lớp vi tính #chụp động mạch vành #CT #MDCT #liều thấp #nhịp tim #BMI #công nghệ 256 lát cắtTài liệu tham khảo
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