[Correlation between the lung pixel indexes of multi-slice spiral CT and pulmonary function test]

Area of Science:

• Radiology
• Pulmonary Medicine
• Medical Imaging Analysis

Background:

• Pulmonary function tests (PFTs) are standard for assessing lung health.
• Multi-slice spiral CT (MSCT) offers detailed anatomical lung imaging.
• Quantitative CT analysis can provide novel insights into lung physiology.

Purpose of the Study:

• To investigate the relationship between lung pixel indexes derived from MSCT and results from PFTs.
• To explore the characteristics of lung attenuation histograms obtained via MSCT.
• To determine the utility of MSCT quantitative metrics in evaluating pulmonary function.

Main Methods:

• 127 subjects underwent MSCT scans (inspiration, expiration, normal respiration) and PFTs within a week.
• Pulmonary quantitative software was used to measure lung pixel indexes from MSCT data.
• Analysis included various pixel indexes and lung attenuation histograms.

Main Results:

• Significant correlations were observed between all MSCT lung pixel indexes and PFT results.
• The index PI(-910Huex/in) demonstrated the highest correlation with FEV1/FVC (r = 0.901, P < 0.01).
• Three distinct lung attenuation histogram patterns were identified: double-peak (n=28), similar normal (n=81), and partial (n=18).

Conclusions:

• MSCT-derived lung pixel indexes show a significant correlation with PFT outcomes.
• These quantitative CT indexes serve as a valuable tool for assessing pulmonary function.
• MSCT quantitative analysis holds potential for non-invasive evaluation of lung health.