Multisegment and halfscan reconstruction of 16-slice computed tomography for assessment of regional and global left ventricular myocardial function

被引:34
作者
Dewey, M
Müller, M
Teige, F
Schnapauff, D
Schink, T
Hamm, B
Lembcke, A
机构
[1] Humboldt Univ, Charite, Sch Med, Dept Radiol, D-10117 Berlin, Germany
[2] Free Univ Berlin, Charite, Sch Med, Dept Med Biometry, D-1000 Berlin, Germany
[3] Free Univ Berlin, Charite, Sch Med, Dept Radiol, D-1000 Berlin, Germany
关键词
myocardial function; computed tomography; heart; ventricles; magnetic resonance; comparative study;
D O I
10.1097/01.rli.0000201233.42994.9b
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Rationale and Objectives: We Sought to prospectively compare multisegment and halfscan reconstruction of 16-slice computed tomography (CT) for the assessment of regional and global left ventricular myocardial function with magnetic resonance imaging (MRI) as the reference standard. Materials and Methods: Forty-two patients underwent CT with 16 X 0.5-mm detector collimation. Electrocardiogram -gated reconstructions were generated with multisegment reconstruction (using up to 4 segments correlated with the raw data of up to 4 heartbeats) and standard halfscan reconstruction. Steady-state free-precession cine MRI was acquired within 24 hours. Results: More normal myocardial segments were identified correctly with multisegment (95%, 620/656) compared with halfscan reconstruction (88%, 582/656) of CT (P < 0.001). Also, the accuracy (92% [657/714] vs. 87% [620/714]) and rate of nondiagnostic segments (0% vs. 5% [33/714]) were significantly better when using multisegment reconstruction (P < 0.001). The image quality with multisegment reconstruction was significantly superior to that achieved with halfscan reconstruction (P < 0.001). In the assessment of global left ventricular function, multisegment and halfscan reconstruction of CT showed high correlations for all parameters with MRI, whereas Bland-Altman analysis revealed smaller limits of agreement for assessment of myocardial mass with multisegment reconstruction (P = 0.025), but no significant differences between both reconstruction techniques in the measurement of left ventricular volumes as compared with MRI. Conclusions: Multisegment reconstruction of 16-detector row CT improves image quality and assessment of regional wall motion compared with standard halfscan reconstruction.
引用
收藏
页码:400 / 409
页数:10
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