Linked Life Data

1766829

Source:http://linkedlifedata.com/resource/pubmed/id/1766829

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1992-2-20
pubmed:abstractText
The alteration ratio of lung field CT numbers in different respiratory phases was studied in 52 patients with chronic pulmonary obstructive disease (COPD) and 20 subjects with normal lung. The 52 patients with COPD consisted of 30 with clinically diagnosed chronic pulmonary emphysema (CPE), 15 with suspected CPE (sCPE) and seven with bronchial asthma (BA). The 20 subjects with normal lung were divided into two groups according to age. CT images were obtained in each case under different respiratory conditions, i.e., full inspiration and end expiration. The following parameters were employed for numerical evaluation: %(I-E)Apex = (MLDApexI-MLDApexE/MLDApexE x 100 %(I-E)Mid = (MLDMidI-MLDMidE)/MLDMidE x 100 %(I-E)Base = (MLDBaseI-MLDBaseE)/MLDBaseE x 100 %(I-E)Whole = (MLDWholeI-MLDWholeE)/MLDWholeE x 100 where MLD is mean lung density and the letters I and E stand for full inspiration and end expiration, respectively. The small letters Apex, Mid, Base and Whole stand for apex cut, mid-thorax cut, base cut and whole lung, respectively. The values of %(I-E)Whole were significantly different between disease groups except for those between the sCPE and BA groups. The values of %(I-E)Whole showed a good positive correlation with FEV1.0% (r = 0.79) and V25/H (r = 0.80) and a good negative correlation RV/TLC (r = -0.75). Diagnostic differentiation of COPDs by %(I-E)Whole values identified 80% of CPE cases and 91% of normal lung cases. In the sCPE group, the values of %DLco in patients with %(I-E)Whole above 9% were smaller than those in patients with %(I-E)Whole under 9%.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
jpn
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0048-0428
pubmed:author
pubmed:issnType
Print
pubmed:day
25
pubmed:volume
51
pubmed:owner
NLM
pubmed:authorsComplete
N
pubmed:pagination
1352-8
pubmed:dateRevised
2011-7-26
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
[Alteration ratio of lung field CT numbers of full inspiration to end expiration scans in chronic obstructive pulmonary diseases].
pubmed:affiliation
Department of Radiology, Hiroshima University School of Medicine.
pubmed:publicationType
Journal Article, English Abstract