Tatsuo Takeuchi

Optimization of Block Sequential Regularized Expectation Maximization Reconstruction Parameters for Striatal SPECT Using a Ring-Type Semiconductor SPECT/CT System

Hayato Odagiri, Hayato Sato, Hiroyasu Kodama, Yoshitaka Tanaka et autres

This phantom study aimed to optimize the noise-suppression parameter (β) and the edge-preservation parameter (γ) values in the block sequential regularized expectation maximization (BSREM) reconstruction method for 123I-2-β-carbomethoxy-3β-(4-iodophenyl)-N-(3-fluoropropyl)nortropane striatal SPECT using a ring-type cadmium–zinc–telluride camera. Methods: We used a striatum phantom filled …

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The Utility of a Modified Data-Driven Motion Correction Method Incorporating Computed Tomography Positional Data for Positron Emission Tomography

Hayato Odagiri, Hiroshi Watabe, Kentaro Takanami, Hirofumi Kawakami et autres

In positron emission tomography/computed tomography (PET/CT), long image acquisition time often causes patient motion and misalignment between the PET and CT images. This misalignment can compromise the accuracy of attenuation correction and quantitative values, thus affecting diagnostic reliability. Recently, data-driven motion correction …

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Spatial Resolution and Uniformity of a Full-ring CZT SPECT/CT System: Comparison with a Conventional Anger-type SPECT/CT Instrument

Tatsuo Takeuchi, Yoshitaka Tanaka, Hayato Odagiri

PURPOSE: StarGuide (GE HealthCare, Haifa, Israel) is a full-ring SPECT/CT system based on Cadmium Zinc Telluride (CZT) technology. In this study, we aimed to compare the image quality of this CZT-based SPECT/CT to a conventional Anger-type SPECT/CT system (NM/CT 870 DR, 870DR; …

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Investigation of the Optimal Parameters for Block Sequential Regularized Expectation Maximization (BSREM) Reconstruction in Bone SPECT Using a Ring-type Semiconductor SPECT/CT

Hayato Sato, Hayato Odagiri, Hiroyasu Kodama, Tatsuo Takeuchi et autres

PURPOSE: This research aims to optimize the block sequential regularized expectation maximization (BSREM) reconstruction in bone single photon emission computed tomography (SPECT) images using a ring-type SPECT/computed tomography (CT) system in terms of image quality and accuracy of quantitative evaluation. METHODS: ). …

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Impact of Sweep Motion in a Full-ring Semiconductor SPECT/CT System on Image Quality: Evaluation through Phantom Experiments

Yoshitaka Tanaka, Tatsuo Takeuchi, Hiroyasu Kodama, Hayato Odagiri

PURPOSE: StarGuide (GE HealthCare, Haifa, Israel), a full-ring SPECT/CT system using Cadmium Zinc Telluride (CZT) technology, allows detectors to perform a pendulum motion (sweep) during SPECT acquisition. It offers two sweep modes: continuous and step and shoot, and we investigated the impact …

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Characteristics and outcome of suspected cerebrovascular disease in dogs: 66 cases (2009‐2016)

Takesumi Ozawa, Naoki Miura, Hitomi Hasegawa, Takehiro Uemura et autres

OBJECTIVES: To characterise the clinical signs of suspected cerebrovascular disease in dogs. MATERIALS AND METHODS: Medical records of one hospital were searched from November 2009 to December 2016 for dogs that suffered of cerebrovascular disease. We diagnosed cerebrovascular disease based on acute …

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Effect of Hyperglycemia on Serum T4 and T3 Levels in Rats

Tadasu Ikeda, Tatsuo Takeuchi, Yasuo Ito, Isao Murakami et autres

In order to elucidate the effect of hyperglycemia on serum thyroid hormone levels, serum T4 and T3 concentrations were measured in rats with continuous intravenous glucose infusion. 30% glucose solution was infused into the left jugular vein at a rate of 1 …

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Possible role of the adrenergic mechanism in gastric inhibitory polypeptide-and glucagon-like peptide-1 (7–36) amide-induced insulin release in the rat

Tadasu Ikeda, Hiroshi Ochi, Izumi Ohtani, K. Fujiyama et autres

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In vitro effects of glycosylated insulin in perfused liver and hindquarter in rats

Tadasu Ikeda, Hiroshi Ochi, Izumi Ohtani, K. Fujiyama et autres

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Possible role of adrenergic mechanism in starvation-induced reduction in circulating thyroxine and triiodothyronine in rats

Tadasu Ikeda, Izumi Ohtani, T. Hoshino, Yasushi Tanaka et autres

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Possible role of the stomach in enteroinsular axis in rats

Tadasu Ikeda, K. Fujiyama, Tazue Hoshino, Tatsuo Takeuchi et autres

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Oral and intravenous glucose-induced insulin secretion in hyperthyroid patients

Tadasu Ikeda, K. Fujiyama, Tazue Hoshino, Tatsuo Takeuchi et autres

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