RESUMO
Brachial Plexus Injury [BPI] is an uncommon complication of median sternotomy capable of causing a permanent or transitory sensitivity and/or motor function impairment in the upper limbs. During a cardiac surgery through sternotomy, for the assessment of the thoracic cage configuration and the site of mediastinal structures, a broader surgical field may be required. If the sternal retractors are overstretched, the costovertebral junctions are likely to be dislocated damaging the adjacent soft tissues at the same time. Magnetic Resonance Imaging [MRI] is the modality of choice for estimating the degree of physical damage to the brachial plexus. In this paper, we intended to report the MRI findings of a chronic case of BPI following a cardiac surgery
RESUMO
OBJECTIVE: We wanted to compare the variability in the longitudinal emphysema index (EI) measurements that were computed with standard and high resolution (HR) reconstruction algorithms (RAs). MATERIALS AND METHODS: We performed a retrospective review of 475 patients who underwent CT for surveillance of lung nodules. From this cohort, 50 patients (28 male) were included in the study. For these patients, the baseline and follow-up scans were acquired on the same multidetector CT scanner and using the same acquisition protocol. The CT scans were reconstructed with HR and standard RAs. We determined the difference in the EI between CT1 and CT2 for the HR and standard RAs, and we compared the variance of these differences. RESULTS: The mean of the variation of the total lung volume was 0.14 L (standard deviation [SD] = 0.13 L) for the standard RA and 0.16 L (SD = 0.15 L) for the HR RA. These differences were not significant. For the standard RA, the mean variation was 0.13% (SD = 0.44%) for EI -970 and 0.4% (SD = 0.88%) for EI -950; for the HR RA, the mean variation was 1.9% (SD = 2.2%) for EI -970 and 3.6% (SD = 3.7%) for EI -950. These differences were significant. CONCLUSION: Using an HR RA appears to increase the variability of the CT measurements of the EI.
Assuntos
Idoso , Feminino , Humanos , Masculino , Algoritmos , Artefatos , Imageamento Tridimensional , Enfisema Pulmonar/diagnóstico por imagem , Interpretação de Imagem Radiográfica Assistida por Computador/métodos , Estudos Retrospectivos , Estatísticas não Paramétricas , Tomografia Computadorizada por Raios XRESUMO
No abstract available.
Assuntos
Humanos , Vírus da Influenza A Subtipo H1N1 , Influenza Humana/complicações , Pneumonia/diagnóstico por imagem , Radiografia Torácica , Tomografia Computadorizada por Raios XRESUMO
No abstract available.