Danhua Zhao

Learn More
A fundamental analysis of phase aberration correction techniques which use speckle brightness-based image equality factors (QFs) to iteratively reduce phase errors is presented. Phase aberration arises from the spatial inhomogeneity of acoustic velocity in human tissue and degrades the performance of diagnostic ultrasonic imaging systems. A theoretical(More)
INTRODUCTION The exact mechanism of the mitochondrial myopathy, encephalopathy, lactic acidosis and stroke-like episodes (MELAS) remain unclear. Diffusion-weighted imaging (DWI) is a magnetic resonance (MR) imaging technique for studying the pathophysiologic change of the MELAS. The purpose of the study is to see whether the apparent diffusion coefficient(More)
OBJECTIVE To summarize the clinical audiologic features of patients with mitochondrial DNA (mtDNA) A3243G mutation and explore the lesion location of hearing loss so as to examine its correlation with the related syndrome. METHODS A total of 44 patients with mtDNA A3243G mutation from 2009-2011 were studied. Audiological evaluations consisted of(More)
  • 1