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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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The blood drainage from the head and neck is primarily managed by three pairs of veins: the external jugular, internal jugular, and vertebral veins. The external jugular veins drain superficial scalp and face structures, passing over the sternocleidomastoid muscles to empty into the subclavian veins.
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The Fast Fourier Transform (FFT) is a computational algorithm designed to compute the Discrete Fourier Transform (DFT) efficiently. By breaking down the calculations into smaller, manageable sections, the FFT significantly reduces the computational complexity involved. Direct computation of an N-point DFT requires N2 complex multiplications, whereas the FFT algorithm needs only (N/2)log⁡2N multiplications, offering a much faster performance.
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The Fourier Transform (FT) is an essential mathematical tool in signal processing, transforming a time-domain signal into its frequency-domain representation. This transformation elucidates the relationship between time and frequency domains through several properties, each revealing unique aspects of signal behavior.
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The Discrete Fourier Transform (DFT) is a fundamental tool in signal processing, extending the discrete-time Fourier transform by evaluating discrete signals at uniformly spaced frequency intervals. This transformation converts a finite sequence of time-domain samples into frequency components, each representing complex sinusoids ordered by frequency. The DFT translates these sequences into the frequency domain, effectively indicating the magnitude and phase of each frequency component present...
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用富里埃变换红外光谱学对头癌进行呼气分析:非侵入性查的可行性研究.

Kota Nakasuji1, Yoshihito Tanaka1, Masato Yamamoto2

  • 1Department of Otorhinolaryngology-Head and Neck, Odawara Municipal Hospital, Kanagawa 250-8558, Japan.

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概括

呼出的气息的富里埃变换红外光谱 (FTIR) 显示出对非侵入性头癌查的前景. 这种方法为早期检测提供了内镜的可行替代方案.

关键词:
这是一个FTIR.呼出的气息 呼出的气息头部和部癌症是什么意思查检查 查检查 查检查 查检查

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科学领域:

  • 生物医学工程 生物医学工程
  • 频谱学是一种光谱学.
  • 在瘤学瘤学.

背景情况:

  • 早期发现头癌可以改善患者的治疗结果.
  • 目前的查方法,如内镜是侵入性的,需要专业的专业知识.
  • 需要一种更简单,非侵入性的查工具.

研究的目的:

  • 评估福里埃变换红外光谱 (FTIR) 分析呼气的临床可行性,作为头癌的非侵入性查工具.

主要方法:

  • 从头癌患者 (n=10) 和健康对照组 (n=14) 的呼气样本使用FTIR光谱分析.
  • 红外吸收光谱在各组之间进行了比较.
  • 进行了接收器操作特征 (ROC) 分析.

主要成果:

  • 在FTIR光谱检测中,患者和对照人群之间的呼吸光谱有显著差异 (2691个波数点,p <0.05).
  • 一个特定的波数 (3917.3 cm−1) 显示出很大的差异 (p = 0.00015).
  • 在ROC分析中,曲线下的面积为0.929,这表明了良好的区分性表现.

结论:

  • 基于FTIR的呼气分析是一种非侵入性和可行的查头癌的方法.
  • 该技术显示了在癌症查中临床应用的潜力.
  • 这种方法可能适用于检测其他疾病.