User profiles for Koichi Okuda

Koichi Okuda

Hirosaki University
Verified email at hirosaki-u.ac.jp
Cited by 1760

Calculation of the fractal dimensions of machined surface profiles

M Hasegawa, J Liu, K Okuda, M Nunobiki - Wear, 1996 - Elsevier
The optimal method calculating the fractal dimension of a machined surface profile is
discussed in this paper. Through the analysis of the results calculated by use of the Weiestrass-…

Multicenter cross-calibration of I-123 metaiodobenzylguanidine heart-to-mediastinum ratios to overcome camera-collimator variations

K Nakajima, K Okuda, M Yoshimura, S Matsuo… - Journal of Nuclear …, 2014 - Elsevier
Background The heart-to-mediastinum ratio (HMR) of 123 I-metaiodobenzylguanidine (MIBG)
showed variations among institutions and needs to be standardized among various …

[HTML][HTML] Normal values and standardization of parameters in nuclear cardiology: Japanese Society of Nuclear Medicine working group database

…, T Kasai, S Matsuo, K Kiso, K Okuda - Annals of nuclear …, 2016 - Springer
As a 2-year project of the Japanese Society of Nuclear Medicine working group activity,
normal myocardial imaging databases were accumulated and summarized. Stress-rest with …

Semi-automated algorithm for calculating heart-to-mediastinum ratio in cardiac Iodine-123 MIBG imaging

K Okuda, K Nakajima, T Hosoya, T Ishikawa… - Journal of Nuclear …, 2011 - Elsevier
Background We have developed novel software for semi-automatically measuring heart-to-mediastinum
(H/M) ratio in cardiac Iodine-123 ( 123 I)-labeled meta-iodobenzylguanidine (…

Standardization of metaiodobenzylguanidine heart to mediastinum ratio using a calibration phantom: effects of correction on normal databases and a multicentre study

K Nakajima, K Okuda, S Matsuo, M Yoshita… - European journal of …, 2012 - Springer
Purpose This study was performed to demonstrate that the results obtained with a calibration
phantom could be used as a tool for standardizing measurement of heart to mediastinum (H…

Comparison of phase dyssynchrony analysis using gated myocardial perfusion imaging with four software programs: Based on the Japanese Society of Nuclear …

K Nakajima, K Okuda, S Matsuo, K Kiso… - Journal of nuclear …, 2017 - Elsevier
Purpose Left ventricular (LV) phase dyssynchrony parameters based on gated myocardial
perfusion imaging varied among software programs. The aim of this study was to determine …

[HTML][HTML] Diagnostic accuracy of an artificial neural network compared with statistical quantitation of myocardial perfusion images: a Japanese multicenter study

…, S Hida, H Tanaka, K Yokoyama, K Okuda… - European journal of …, 2017 - Springer
Purpose Artificial neural networks (ANN) might help to diagnose coronary artery disease.
This study aimed to determine whether the diagnostic accuracy of an ANN-based diagnostic …

Experimental evaluation of the GE NM/CT 870 CZT clinical SPECT system equipped with WEHR and MEHRS collimator

…, M Onoguchi, H Ichikawa, K Okuda… - Journal of applied …, 2021 - Wiley Online Library
Purpose A high‐energy‐resolution whole‐body SPECT‐CT device (NM/CT 870 CZT; C‐SPECT)
equipped with a CZT detector has been developed and is being used clinically. A …

Effect of cutting heat on machining accuracy in ultra-precision diamond turning

T Moriwaki, A Horiuchi, K Okuda - CIRP Annals, 1990 - Elsevier
The paper deals with experimental and theoretical analyses of the thermal deformation of
cutting tool and workpiece due to the cutting heat and its effect on the machining accuracy in …

A European myocardial 123I-mIBG cross-calibration phantom study

DO Verschure, E Poel, K Nakajima, K Okuda… - Journal of Nuclear …, 2018 - Elsevier
Aim Planar myocardial 123 I-meta-iodobenzylguanidine ( 123 I-mIBG) scintigraphy is a
highly reproducible technique. However, differences in collimator use are one of the most …