PubMed · 14376721
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
C A PRIVITERI. 1955. Physiological bronchography.. https://pubmed.ncbi.nlm.nih.gov/14376721/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
The most common causes of pulmonary edema are cardiac failure, renal failure and injury edema (diffuse alveolar damage). The injury edema typically shows airspace consolidation due to exsudation of fluid in the periphery of the lung with air bronchograms, no interstitial fluid accumulation can be found and only rarely pleural effusions are present. Cardiac and renal edemas often show a mixed interstitial and alveolar transudation without air bronchograms. Pleural effusions are often present. Both usually have an increased heart-size and an increased vascular pedicle width. To distinguish them better one has to look at the distribution of the pulmonary edema: The cardiac edema typically shows a gravitational and the renal edema a central distribution.
OBJECTIVE: Our goal was to determine the impact of ECG gating and different postprocessing techniques on 3D imaging of the bronchial tree. SUBJECTS AND METHODS. Retrospective ECG-gated MDCT and non-ECG-gated MDCT of the chest were performed in 25 patients. ECG-gated MDCT data were reconstructed mid diastole using a fixed interval of -400 msec in 25 patients and then additionally at -200, -300, and -500 msec in 10 of those patients. Shaded surface display and volume rendering of the bronchial tree combined with virtual bronchoscopy were performed using all data sets. The extent of bronchial tree visualization in shaded surface display-virtual bronchoscopy and volume rendering-virtual bronchoscopy and the presence of artifacts in volume-rendered images were scored by three blinded reviewers. The effective radiation doses of the ECG-gated and nongated acquisitions were compared. RESULTS: The summary scores of all bronchial segments for gated shaded surface display-virtual bronchoscopy and gated volume rendering-virtual bronchoscopy did not differ significantly. The summary scores for nongated shaded surface display-virtual bronchoscopy and nongated volume rendering-virtual bronchoscopy were not significantly different. Non-gated acquisition yielded significantly better visualization of the bronchial tree for both post-processing techniques, regardless of the time interval used for reconstruction of the ECG-gated series. Artifact scores in volume-rendered images were significantly higher for ECG-gated MDCT compared with nongated MDCT. Effective radiation dose was significantly higher for the ECG-gated acquisition. CONCLUSION: Given the advantage of volume rendering for representing the entire data set and given the lower radiation dose and better 3D image quality of nongated acquisition, volume rendering performed on nongated MDCT data is the method of choice for 3D visualization of the bronchial tree.
In patients with suspected pneumonia, chest radiography and CT play an important role in making the differential diagnosis and evaluating disease severity and progress. The radiologic patterns of both community-acquired and opportunistic pneumonias were reviewed and compared with those of non-infectious lung diseases. The important findings in the diagnosis of pneumonias were as follows: 1) the relationship between the extent of consolidation and segment or lobe; 2) homogeneity or heterogeneity of opacity; 3) presence of thickening of bronchi and bronchioli; centrilobular, acinar, lobular, and segmental opacities; air bronchogram; tree-inbud appearance, and mosaic perfusion; and 4) size and distribution of nodules.