What question did this study set out to answer?

To determine whether relative lung area below specific CT attenuation thresholds accurately quantifies macroscopic pulmonary emphysema compared to pathological morphometry.

August 1, 1995American Journal of Respiratory and Critical Care Medicine

Comparison of Computed Density and Macroscopic Morphometry in Pulmonary Emphysema

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Authors

PGP A GevenoisErasmus Hospital VMViviane De MaertelaerUniversité Libre de Bruxelles PVPaul De VuystErasmus Hospital

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Implication

Comparative study reveals a -950 Hounsfield unit threshold matches macroscopic morphometry in pulmonary emphysema, indicating high variability with wider scan intervals.

Key Points

To determine whether relative lung area below specific CT attenuation thresholds accurately quantifies macroscopic pulmonary emphysema compared to pathological morphometry.
Analyzed high-resolution computed tomography (HRCT) scans acquired at 1 cm intervals in 63 subjects undergoing resection for cancer or lung transplantation.
Calculated relative low-attenuation areas across eight cutoffs (-900 to -970 HU) and compared them with computer-assisted morphometry on paper-mounted lung sections spaced 1 to 2 cm apart.
Recalculated relative area at -950 HU across progressively fewer scans to assess whether increased scan spacing maintained measurement accuracy.
A cutoff of -950 HU was the only threshold displaying no statistically significant difference between HRCT attenuation measurements and macroscopic morphometric data.
Subsampling scans across wider intervals demonstrated substantial inter-patient variability in deviation from the 1 cm reference, preventing the recommendation of a standard optimal scan distance.

Cite This Study

Gevenois et al. (1995) studied this question.

synapsesocial.com/papers/6a01dbb1449274ec075cb7a8 https://doi.org/10.1164/ajrccm.152.2.7633722

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Implication

Comparative study reveals a -950 Hounsfield unit threshold matches macroscopic morphometry in pulmonary emphysema, indicating high variability with wider scan intervals.

Comparison of Computed Density and Macroscopic Morphometry in Pulmonary Emphysema

Discussion

Member takes

Implication

Key Points

Cite This Study

Comparison of Computed Density and Macroscopic Morphometry in Pulmonary Emphysema

Discussion

Member takes

Implication

Key Points

Cite This Study

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