Techniques of assessing small airways dysfunction

W McNulty, OS Usmani - European clinical respiratory journal, 2014 - Taylor & Francis
The small airways are defined as those less than 2 mm in diameter. They are a major site of
pathology in many lung diseases, not least chronic obstructive pulmonary disease (COPD) …

New and current clinical imaging techniques to study chronic obstructive pulmonary disease

HO Coxson, J Mayo, S Lam, G Santyr… - American journal of …, 2009 - atsjournals.org
Chronic obstructive pulmonary disease (COPD) is a heterogeneous disease characterized
by both small airway and parenchymal abnormalities. There is increasing evidence to …

Hyperpolarized 3He and 129Xe MR Imaging in Healthy Volunteers and Patients with Chronic Obstructive Pulmonary Disease

M Kirby, S Svenningsen, A Owrangi, A Wheatley… - Radiology, 2012 - pubs.rsna.org
Purpose To quantitatively compare hyperpolarized helium 3 (3He) and xenon 129 (129Xe)
magnetic resonance (MR) images obtained within 5 minutes in healthy volunteers and …

Hyperpolarized 3He magnetic resonance functional imaging semiautomated segmentation

M Kirby, M Heydarian, S Svenningsen, A Wheatley… - Academic radiology, 2012 - Elsevier
RATIONALE AND OBJECTIVES: To improve intra-and interobserver variability and enable
the use of functional magnetic resonance imaging (MRI) for multicenter, multiobserver …

Hyperpolarized 3He and 129Xe MRI: Differences in asthma before bronchodilation

S Svenningsen, M Kirby, D Starr… - Journal of magnetic …, 2013 - Wiley Online Library
Purpose To compare hyperpolarized helium‐3 (3He) and xenon‐129 (129Xe) MRI in
asthmatics before and after salbutamol inhalation. Materials and Methods Seven asthmatics …

Hyperpolarized 129Xe MR Imaging of Alveolar Gas Uptake in Humans

ZI Cleveland, GP Cofer, G Metz, D Beaver, J Nouls… - PloS one, 2010 - journals.plos.org
Background One of the central physiological functions of the lungs is to transfer inhaled
gases from the alveoli to pulmonary capillary blood. However, current measures of alveolar …

Is computed tomography airway count related to asthma severity and airway structure and function?

RL Eddy, S Svenningsen, M Kirby… - American Journal of …, 2020 - atsjournals.org
Rationale: In patients with asthma, X-ray computed tomography (CT) has provided evidence
of thickened airway walls and airway occlusions, but the total number of CT-visible airways …

What are ventilation defects in asthma?

S Svenningsen, M Kirby, D Starr, HO Coxson… - Thorax, 2014 - thorax.bmj.com
Background Hyperpolarised 3He MRI provides a way to visualise regional pulmonary
functional abnormalities that in asthma are thought to be related to airway morphological …

Hyperpolarized 3He Ventilation Defects Used to Predict Pulmonary Exacerbations in Mild to Moderate Chronic Obstructive Pulmonary Disease

M Kirby, D Pike, HO Coxson, DG McCormack… - Radiology, 2014 - pubs.rsna.org
Purpose To evaluate the predictive value of imaging and clinical and physiological
measurements of chronic obstructive pulmonary disease (COPD chronic obstructive …

Free-breathing Dynamic 19F Gas MR Imaging for Mapping of Regional Lung Ventilation in Patients with COPD

M Gutberlet, TF Kaireit, A Voskrebenzev, F Lasch… - Radiology, 2018 - pubs.rsna.org
Purpose To quantify regional lung ventilation in patients with chronic obstructive pulmonary
disease (COPD) by using free-breathing dynamic fluorinated (fluorine 19 [19F]) gas …