| Computed Tomography of the Lung in the High-Pitch Mode: Is Breath Holding Still Required? | |
| | |
MedLine Citation:
|
PMID: 21217528 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
OBJECTIVES:: To prospectively investigate whether the high-pitch mode (HPM) for computed tomography (CT) enables the diagnostic visualization of the lung parenchyma without suspended respiration. MATERIALS AND METHODS:: A total of 40 consecutive patients (age, 67 ± 11 years) underwent 128-slice dual-source CT of the chest including nonenhanced, arterial, and venous phase of contrast. CT was performed in the HPM with a pitch of 3.2 during continuous breathing (group A) and during breath-hold (group B), and at standard pitch of 1 during deep-inspiratory breath-hold (group C). The 3 protocols were scanned in a random order in each patient. Two blinded readers independently assessed the image quality of 5 regions in both the lungs using a semiquantitative 3-point score. Image noise was measured as the standard deviation of attenuation. Presence and size of pulmonary nodules were noted and measured on each CT dataset. Lung volume was measured using dedicated semi-automated segmentation software. RESULTS:: Interobserver agreement for image quality ratings was excellent (κ = 0.91). There were no significant differences in the number of lung regions having an image quality other than excellent between group A (2.5%) and B (1.5%, P = 0.48), whereas significantly less regions had impaired image quality in group B compared with group C (5.5%, P < 0.01). Image quality impairment in group C was because of breathing in 36% and cardiac pulsation in 64%. Image noise in group C (9 ± 2 HU) was significantly lower than that in group B (30 ± 2 HU, P < 0.001) whereas no significant difference was found between group A and B (P = 0.52). There were no significant differences for the depiction (P = 1.0) and size (P = 0.94) of lung nodules among the 3 modes. Average lung volume in group A was 75% ± 15% of that in deep inspiration (group B/C) being significantly smaller (P < 0.05). Estimated effective radiation doses in group C and group B were 5.8 ± 0.5 mSv and 1.6 ± 0.1 mSv, respectively. CONCLUSIONS:: CT of the lung can be accomplished using the HPM at a low radiation dose with a diagnostic image quality even without suspended respiration. |
| | |
Authors:
|
Stephan Baumueller; Hatem Alkadhi; Paul Stolzmann; Thomas Frauenfelder; Robert Goetti; Thomas Schertler; Andre Plass; Volkmar Falk; Gudrun Feuchtner; Hans Scheffel; Lotus Desbiolles; Sebastian Leschka |
Related Documents
:
|
23006108 - Ultrahigh-resolution magnetic resonance in inhomogeneous magnetic fields: two-dimension... 23558728 - Effect of brightness in the evaluation of lumbar pedicular screws position: clinical st... 17505178 - Delayed manifestation and slow progression of cerebral infarction caused by polycythemi... 19345958 - Thalamic infarction disrupts spinothalamocortical projection to the mid-cingulate corte... 10776868 - Nonoperative management of blunt liver trauma: the value of follow-up abdominal compute... 22406788 - A study of familial melas: evaluation of a3243g mutation, clinical phenotype, and magne... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-1-7 |
Journal Detail:
|
Title: Investigative radiology Volume: - ISSN: 1536-0210 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
|
Created Date: 2011-1-10 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0045377 Medline TA: Invest Radiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
From the *Institute for Diagnostic and Interventional Radiology, University Hospital Zurich, Zurich, Switzerland; †Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA; ‡Clinic for Cardiovascular Surgery, University Hospital Zurich, Zurich, Switzerland; and §Institute of Radiology, Cantonal Hospital St. Gallen, St. Gallen, Switzerland. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Initial Results of 3-Dimensional 1H-Magnetic Resonance Spectroscopic Imaging in the Localization of ...
Next Document: The effectiveness of traditional and sling exercise strength training in women.