| Evaluation of cartilage surface injuries using 3D-double echo steady state (3D-DESS): Effect of changing flip angle from 40{degrees} to 90{degrees} | |
| | |
MedLine Citation:
|
PMID: 22042983 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
BackgroundIn magnetic resonance imaging (MRI) with 3D-double-echo steady-state (3D-DESS) sequences, the cartilage-synovial fluid contrast is reported to be better with a flip angle of 90° than with the conventional flip angle of 40°, and the detection rate of knee cartilage injury may be improved.PurposeTo compare the diagnostic performance and certainty of diagnosis with 3D-DESS images made using two flip angle settings, 40° and 90°, for knee cartilage surface lesions of Grade 2 or above confirmed by arthroscopy.Material and MethodsImages were obtained with 3D-DESS flip angles of 40° and 90° at 1.0T in 13 consecutive patients (2 men, 11 women, age range 18-68 years) evaluated for superficial cartilage injury by arthroscopy. Two radiologists classified the presence or absence of cartilage damage of ≥Grade 2 as 'positive (p)' or 'negative (n)', respectively. The rate of agreement with arthroscopic diagnosis was then examined, and the diagnostic performance compared. Diagnostic confidence was assessed scoring the presence or absence of cartilage damage into three categories: 3 = can diagnose with absolute confidence; 2 = can diagnose with a level of certainty as probably present or probably absent; and 1 = cannot make a diagnosis.ResultsIn a comparison of the rate of agreement between diagnosis by 3D-DESS images and arthroscopy, the rate of agreement was significantly higher and diagnostic performance was better in 90° images for the medial femoral condyle only. Diagnostic confidence was significantly better with 90° flip angle images than with 40° flip angle images for all six cartilage surfaces.ConclusionIn evaluating knee cartilage surface lesions with 3D-DESS sequences, a flip angle setting of 90° is more effective than the conventional setting of 40°. |
| | |
Authors:
|
Susumu Moriya; Yukio Miki; Mitsunori Kanagaki; Akira Yamamoto; Shuzo Okudaira; Shinichiro Nakamura; Tsuneo Yokobayashi; Mitsunori Ishikawa |
Related Documents
:
|
21990043 - T(1ρ) and t(2) mapping reveal the in vivo extracellular matrix of articular cartilage. 6728163 - Meningoencephalitis complicated by pituitary insufficiency and a spontaneously resolvin... 19964833 - Normalized power transmission between abp and icp in tbi. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-10-31 |
Journal Detail:
|
Title: Acta radiologica (Stockholm, Sweden : 1987) Volume: - ISSN: 1600-0455 ISO Abbreviation: - Publication Date: 2011 Oct |
Date Detail:
|
Created Date: 2011-11-1 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8706123 Medline TA: Acta Radiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Ishikawa Clinic, Kyoto, Japan. |
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: Effect of ageing and pulmonary inflammation on the incidence and number of cross-bridging structures...
Next Document: Comparison of virtual bronchoscopy with fiberoptic bronchoscopy findings in patients exposed to sulf...