Measurement of Total Lung Capacity: A Comparison of Spiral CT and Spirometry
Journal of the Korean Radiological Society
;
: 189-193, 1996.
Article
in Korean
| WPRIM
| ID: wpr-127620
ABSTRACT
PURPOSE:
To determine the potential of spiral CT as a functional imaging modality of the lung asid from its proven value in morphological depiction. MATERIALS ANDMETHODS:
Spiral CT scan was performed in ten normal female and nine normal male adults (mean age 39, height 163cm, weight 62kg) after single full breath-holding. Three dimensional lung images were reconstructed (minimal threshold value -1,000HU, maximal threshold values -150,-250, -350, -450HU) to obtain total lung volume(TLV) on a histogram. Total lung volume measured by spiral CT was compared with TLV obtained by spirometry.RESULTS:
Mean TLV measured by spirometry was 5.62 Land TLV measured by CT at maximal threshold values of -150, -250, -350, and -450HU was 6.63, 5.33, 5.15, and 4.98 L, respectively. Mean absolute differences between the modalities of 0.17L(3%), 0.32L(5.6%), 0.48L(8.5%), 0.65L(11.5) were statistically significant(p<0.001). Linear regression coefficients between the modalities were 0.99, 0.97, 0.95,and 0.94 and no statistically significant differences in accuracy of threshold levels in the estimation of lung volume(r=0.99, standard error=0.034L in all) were seen.CONCLUSION:
TLV measured by spiral CT closely approximated that measured by spirometry. Spiral CT may be useful as a means of evaluating lung function.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Spirometry
/
Linear Models
/
Total Lung Capacity
/
Tomography, Spiral Computed
/
Lung
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
Korean
Journal:
Journal of the Korean Radiological Society
Year:
1996
Type:
Article
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