METHOD FOR DETERMINING DEGREE OF INVOLVEMENT OF PULMONARY PARENCHYMA IN EMPHYSEMATOUS PROCESS BY RESULTS OF COMPUTED TOMOGRAPHY Russian patent published in 2024 - IPC A61B6/03 

FIELD: medicine.

SUBSTANCE: invention relates to roentgenology, therapy, pulmonology, thoracic surgery, and can be used to determine degree of involvement of pulmonary parenchyma in emphysematous process. Multispiral computed tomography is performed according to low-dose scanning protocol. Degree of prevalence of areas of increased pneumatization is assessed on the basis of visual analysis of pulmonary parenchyma along the whole length of each of lung lobes. To obtain CT images of lung, X-ray tube rotation time is 0.35 ms, pitch 1.5, window settings: W 1,500 HU, L-700 HU, X-ray tube voltage 110 kV, automatic current modulation 40–90 mA. At that, involvement from 1 to 5% is evaluated as 1 point, involvement from 6% to 25%—as 2 points, involvement from 26% to 50%—as 3 points, involvement from 51% to 75%—as 4 points, involvement from 76% to 100%—as 5 points. On the obtained images, a total score for both lungs is calculated as a sum of points for all individual lobes, after that, total percentage of involvement of lung parenchyma in emphysematous process is determined.

EFFECT: method provides reducing the effective radiation dose of the patients and improving the diagnostic accuracy by obtaining the numerical values of the degree of the pathologically changed pulmonary parenchyma.

1 cl, 15 dwg, 5 tbl, 5 ex