Quantitative Computed Tomography in COPD: Possibilities and Limitations

Limitations of peripheral quantitative computed tomography metaphyseal bone density measurements.

CONTEXT Peripheral quantitative computed tomography (pQCT) measurements are frequently obtained to assess cancellous bone density in the appendicular skeleton. Large variations in bone morphology associated with skeletal development may limit the interpretation of pediatric pQCT studies based on a single slice. OBJECTIVE The objective of the study was to characterize the variability in trabec...

The possibilities and limitations of direct digital radiography, ultrasound and computed tomography in diagnosing pleural mesotelioma.

The goal of this study was to compare the possibilities and limitations of direct digital radiography of the chest (DDR), the use of ultrasound of the chest (US) and single slice computed tomography of the chest (CT) in diagnosing pleural mesothelioma. The study was conducted during the course of one year, on 80 patients who were successively referred to a specialized institution, under clinica...

Drawbacks and limitations of computed tomography.

Quantitative Computed Tomography

Computed Tomography (CT) is a wide-spread medical imaging modality. Traditional CT yields information on a patient’s anatomy in form of slice images or volume data. Hounsfield Units (HU) are used to quantify the imaged tissue properties. Due to the polychromatic nature of X-rays in CT, the HU values for a specific tissue depend on its density and composition but also on CT system parameters and...

Computed tomography-derived pathological phenotypes in COPD.

Chronic obstructive pulmonary disease (COPD) is considered to be a complex, multicomponent, heterogeneous disease, the pathology, clinical and functional presentation of which vary greatly between individual patients despite similar degrees of airflow limitation [1]. COPD has therefore been considered to have distinct phenotypes that represent a single or combination of disease attributes that ...