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A probabilistic model was proposed in this research for fully-automated segmentation of liver region in non-contrast X-ray torso CT images. This probabilistic model was composed of two kinds of probability that show the location and density (CT number) of the liver in CT images. The probability of the liver on the spatial location was constructed from a(More)
It has been reported that widespread multisystem degeneration can occur in patients with sporadic amyotrophic lateral sclerosis (SALS) who have survived for long periods with artificial respiratory support (ARS). We report a case of SALS of 8 years and 8 months duration in a 71-year-old woman, who received ARS for 7 years and 8 months. In this patient, the(More)
SUMMARY The purpose of our study is to develop an algorithm that would enable the automated detection of lacunar infarct on T1-and T2-weighted magnetic resonance (MR) images. Automated identification of the lacunar infarct regions is not only useful in assisting radiologists to detect lacunar infarcts as a computer-aided detection (CAD) system but is also(More)
Segmentation of an abnormal liver region based on CT or MR images is a crucial step in surgical planning. However, precisely carrying out this step remains a challenge due to either connectivities of the liver to other organs or the shape, internal texture, and homogeneity of liver that maybe extensively affected in case of liver diseases. Here, we propose(More)
The incidence of liver diseases is very high in Asian countries. This paper introduces our computer-aided diagnosis (CAD) system for diagnosing liver cancer and describes the fundamental technologies employed in the system and its performance. The results showed that our system is useful for diagnosing liver cancer, and it is expected that employing CAD in(More)
OBJECTIVE The purpose of our study was to assess the correlation between the intensity and characteristics of contrast enhancement on angiographically assisted CT and the intensity of vascular endothelial growth factor (VEGF) expression in hepatocellular carcinoma (HCC) and in the surrounding nontumorous liver. MATERIALS AND METHODS The intensity of VEGF(More)
The authors report a retrospective review o f 70 patients followed up for the presence of incidental, asymptomatic meningiomas. A survey was conducted of primary intracranial tumors diagnosed in Hiroshima Prefectural Hospital between 1995 and 2004. The neuroradiological imaging and clinical studies for asymptomatic meningiomas were performed during the(More)
OBJECTIVE The purpose of our study was to evaluate the clinical feasibility and usefulness of a 2D spoiled gradient-recalled echo MR sequence with serial switching of reversed centric and centric k-space reordering for high-spatial-resolution gadolinium-enhanced double hepatic arterial phase (HAP) MRI of the liver. SUBJECTS AND METHODS MR images(More)
BACKGROUND A central venous catheter enables the measurement of hemodynamic variations, such as accurate central venous pressure; catheter malposition may induce potentially fatal complications. This case report describes a rare central venous catheter tip malposition in the right internal mammary artery. CASE PRESENTATION A 56-year-old Japanese woman who(More)