Publicações científicas

Dual-source CT in heart transplant recipients: quantification of global left ventricular function and mass

Bastarrika, Gorka MD, PhD [ES] (1); Arraiza, Maria MD [ES] (1); De Cecco, Carlo Nicola MD (3); Broncano, Jordi MD (1); Mastrobuoni, Stefano MD, PhD (2); Ubilla, Matias MD (2); Pueyo, Jesus C. MD, PhD [ES] (1); Rabago, Gregorio MD (2)
Institution Departments of (1) Radiology
(2) Cardiovascular Surgery, Clinica Universitaria, Universidad de Navarra
(3) Department of Radiology, Universita' di Roma "Sapienza," Ospedale Sant' Andrea.

Revisão:Journal of Thoracic Imaging

Data: 1/Mai/2009

Cirurgia Cardíaca [ES] Radiología [ES]

OBJECTIVE
To evaluate reliability of global left ventricular (LV) function and mass quantification in heart transplant recipients undergoing cardiac dual-source computed tomography examinations by means of manual contour tracing and using a region-growing-based semiautomatic segmentation analysis software tool.

MATERIALS AND METHODS
Twenty-six consecutive heart transplant recipients undergoing cardiac dual-source computed tomography examinations with tube current modulation were included. Double-oblique short-axis 8-mm slice thickness multiphase image reconstructions were used for manual contouring and axial 0.75 mm slices were used for the semiautomated segmentation. LV ejection fraction, end-diastolic volume, end-systolic volume, stroke volume, cardiac output, and myocardial mass were assessed by both segmentation methods. Length of time needed for manual contour tracing and for the semiautomated software was recorded. Contrast-to-noise ratio was calculated in end-diastolic and end-systolic images.

RESULTS
No statistically significant differences were observed in LV functional parameters derived from semiautomatic contour detection algorithm as compared with manual contouring, with excellent agreement (concordance-correlation coefficient >or=0.80). The semiautomated contour detection algorithm overestimated LV mass (mean difference 12.84+/-3.39) (P<0.001). The evaluated software allowed to quantify LV parameters in a significantly shorter period of time (mean difference 201.68+/-121.98 s, P<0.001). Contrast-to-noise ratio in end-systole and end-diastole statistically differed (mean difference 5.29+/-2.94 Hounsfield units; P<0.01) but did not significantly hamper the semiautomated segmentation.

CONCLUSIONS
Objective quantification of LV volumes using the evaluated semiautomated segmentation software is precise, reproducible, and time effective.

CITAÇÃO DO ARTIGO  J Thorac Imaging. 2009 May;24(2):103-9

talvezlhe interesse

QUE TECNOLOGIA UTILIZAMOS? 

A Clínica é o hospital privado com maiores recursos tecnológicos de Espanha, tudo num único centro.

Imagen de un PET, tecnología de vanguardia en la Clínica Universidad de Navarra

OS NOSSOS
PROFISSIONAIS

Os profissionais da Clínica realizam um trabalho contínuo de investigação e formação, sempre em benefício do paciente.

Imagen profesionales de la Clínica Universidad de Navarra

RAZÕES PARA VIR
À CLÍNICA

Conheça porque é que somos diferentes em relação a outros centros sanitários. Qualidade, rapidez, comodidade e resultados.

Imagen del edificio de la Clínica Universidad de Navarra