Dynamic pulmonary CT: findings in healthy adult men
| Autor: | E J Stern, Gordon Gamsu, N Kanth, W R Webb |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Adult
Male Spirometry medicine.medical_specialty Supine position Posture Air trapping Pulmonary function testing Reference Values Internal medicine medicine Humans Radiology Nuclear Medicine and imaging Lung medicine.diagnostic_test business.industry Respiration Attenuation Exhalation respiratory system respiratory tract diseases medicine.anatomical_structure Cardiology Radiology medicine.symptom Tomography X-Ray Computed business Zones of the lung |
| Zdroj: | Radiology. 186:117-124 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiology.186.1.8416550 |
| Popis: | The authors examined 10 healthy male subjects with dynamic computed tomography to determine normal dynamic and expiratory findings. In both the supine and prone positions, the average increase in lung attenuation during exhalation was found to be significantly greater in dependent lung regions than in nondependent lung regions. In each of the lung zones studied, there was a significant correlation between the decrease in cross-sectional lung area during exhalation and the increase in lung attenuation. At the lung bases, a greater increase in lung attenuation was noted during exhalation for a given change in cross-sectional lung area than in the upper lungs. All 10 subjects showed a distinct lobar attenuation gradient in the supine position. In general, lung attenuation increased homogeneously during exhalation, but four of the 10 subjects showed regions of inhomogeneity in lung attenuation during rapid exhalation indicative of air trapping, despite normal results on pulmonary function tests. |
| Databáze: | OpenAIRE |
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