The Mathematical Function Fast Fourier Transform is Used in Which

Question

The mathematical function fast Fourier transform is used in which testing modality?
A) Respiratory inductive plethysmography
B) Forced oscillatory technique
C) Eucapnic voluntary hyperventilation
D) Nitric oxide analysis

Accepted Answer

Fast Fourier Transform (FFT) is commonly used in Forced Oscillatory Technique (FOT) to analyze the respiratory system impedance. It is a non-invasive method used to assess lung function and it involves delivering small amplitude pressure oscillations at the airway opening and measuring the corresponding flow responses. FFT is used to convert these pressure oscillations from the time domain to the frequency domain, where information about the respiratory system's mechanical properties can be obtained.