Publications by authors named "Yusuke Terakawa"
Article Synopsis
- - The study highlights the challenge of insufficient diagnostic tools for nuclear medicine imaging in newborns, particularly those with extremely low birth weight, and suggests investigating new technology to address this issue.
- - Researchers created a phantom model of a 500-g infant to test cardiac PET imaging with SiPM technology, assessing its ability to visualize a 3-mm myocardial defect using two different tracers (F-FDG and F-flurpiridaz).
- - Results showed that while SiPM PET could effectively image the heart, both tracers overestimated defect accumulation, with F-flurpiridaz providing better contrast, suggesting its preference for future studies if limited to one tracer.
Background: O-oxygen inhalation PET is unique in its ability to provide fundamental information regarding cerebral hemodynamics and energy metabolism in man. However, the use of O-oxygen has been limited in a clinical environment largely attributed to logistical complexity, in relation to a long study period, and the need to produce and inhale three sets of radiopharmaceuticals. Despite the recent works that enabled shortening of the PET examination period, radiopharmaceutical production has still been a limiting factor.
View Article and Find Full Text PDF[The Effects of Misalignment between PET and CT Scans on Brain PET Study Using CT-based Attenuation Correction: A Phantom Study].
Nihon Hoshasen Gijutsu Gakkai Zasshi
February 2017
Purpose: The aim of this study was to evaluate the effects of inaccurate attenuation correction due to the misalignment between the computed tomography (CT)-based μ-map and the positron emission tomography (PET) data on a brain PET.
Methods: CT and PET scans were performed on a 3-dimension (3D) brain phantom, in which the grey matter region was filled with F-fluorodeoxyglucose (F-FDG), and the skull region was filled with/without the bone-equivalent solution. The shifted PET images relative to the CT image were generated by the software-based translation of PET data in the cephalad/caudal and right directions, with a magnitude of the shift up to 30 mm and a step size of 5 mm.
Background: In posterosuperior rotator cuff tears (PS-RCT), the progression of infraspinatus (ISP) muscle atrophy seems to induce compensatory hypertrophy of the teres minor (TM) muscles. However, the effect of these changes on shoulder strength and range of external rotation (ER) remains unclear. This study determined the strength and range of ER in patients with PS-RCT with atrophic ISP and hypertrophic TM and compared this with patients with PS-RCT and normal or deficient TM.
View Article and Find Full Text PDF