Takamichi Murakami

Tomoko Hyodo4
Makoto Hosono4
Kimio Usami3
4Tomoko Hyodo
4Makoto Hosono
3Kimio Usami
Learn More
  • Naoto Hayasaka, Kazuyuki Aoki, Saori Kinoshita, Shoutaroh Yamaguchi, John K. Wakefield, Sachiyo Tsuji-Kawahara +7 others
  • 2011
Regulators of G protein signaling (RGS) are a multi-functional protein family, which functions in part as GTPase-activating proteins (GAPs) of G protein α-subunits to terminate G protein signaling. Previous studies have demonstrated that the Rgs16 transcripts exhibit robust circadian rhythms both in the suprachiasmatic nucleus (SCN), the master circadian(More)
A tetrahedral gradient diffusion sequence for body imaging for a 1.5T scanner was implemented, and we compared the quality of images acquired with the new technique and with the conventional orthogonal technique. Image quality was better using the tetrahedral technique in terms of signal homogeneity in the right liver lobe and signal loss artifact in the(More)
Most liver tumors are benign and hypervascular, and it is important to avoid unnecessary interventions for benign lesions. This review describes the typical and atypical imaging features of common hypervascular benign liver tumors and outlines a general approach to distinguishing between benign and malignant hepatic lesions. There are many types of benign(More)
PURPOSE The aim of this study was to elucidate the regional differences between brain perfusion single photon emission computed tomography (SPECT) images reconstructed with a uniform attenuation correction using Chang's method (AC-Chang) and a non-uniform attenuation correction with CT using SPECT/CT (AC-CT). METHODS SPECT images of a phantom with and(More)
BACKGROUND There is an increasing need for animal disease models for pathophysiological research and efficient drug screening. However, one of the technical barriers to the effective use of the models is the difficulty of non-invasive and sequential monitoring of the same animals. Micro-CT is a powerful tool for serial diagnostic imaging of animal models.(More)
Purpose: To investigate the prevalence and CT image characteristics of anterior mediastinal masses in a population-based cohort and their association with the demographics of the participants. Materials and methods: Chest CT scans of 2571 Framingham Heart Study participants (mean age 58.9 years, 51% female) were evaluated by two board-certified radiologists(More)
UNLABELLED The goal of this study was to clarify whether binding potential (BP) images using (11)C-Pittsburgh compound B ((11)C-PiB) and dynamic PET can reliably detect cortical amyloid deposits for patients whose (11)C-PiB PET static images are ambiguous and whether visual ratings are affected by white matter retention. METHODS Static and BP images were(More)
PURPOSE There is evidence that some cases of patients with dementia with Lewy bodies (DLB) can demonstrate Alzheimer disease (AD) like reduced glucose metabolism without amyloid deposition. The aim of this study was to clarify whether regional hypometabolism is related to amyloid deposits in the DLB brain and measure the degree of regional hypometabolism.(More)
OBJECTIVE We have encountered occasional equivocal findings when assessing cerebral cortical amyloid retention with (11)C-Pittsburgh compound B (PiB) PET. We investigated the diagnostic significance of equivocal PiB PET findings. METHODS This retrospective study included 101 consecutive patients complaining of cognitive disorders (30 Alzheimer's disease,(More)