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32 papers found.
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Risk stratification based on J-ACCESS risk models with myocardial perfusion imaging: Risk versus outcomes of patients with chronic kidney disease

BackgroundThis study aimed to validate the accuracy of major-event risk models created in the multicenter J-ACCESS prognostic study in a new cohort of patients with chronic kidney disease (CKD).Methods and ResultsThree multivariable J-ACCESS risk models were created to predict major cardiac events (cardiac death, non-fatal acute coronary syndrome, and severe heart failure...

Is 123I-metaiodobenzylguanidine heart-to-mediastinum ratio dependent on age? From Japanese Society of Nuclear Medicine normal database

 Wakabayashi 0 Seigo Kinuya 0 0 Department of Physics, Kanazawa Medical University , Uchinada, Kahoku , Japan 1 Kenichi Nakajima Background Heart-to-mediastinum ratios (HMRs) of 123I-metaiodobenzylguanidine

Artificial neural network retrained to detect myocardial ischemia using a Japanese multicenter database

PurposeAn artificial neural network (ANN) has been applied to detect myocardial perfusion defects and ischemia. The present study compares the diagnostic accuracy of a more recent ANN version (1.1) with the initial version 1.0.MethodsWe examined 106 patients (age, 77 ± 10 years) with coronary angiographic findings, comprising multi-vessel disease (≥ 50% stenosis) (52%) or old...

Standardization of 123I-meta-iodobenzylguanidine myocardial sympathetic activity imaging: phantom calibration and clinical applications

Purpose Myocardial sympathetic imaging with 123I-meta-iodobenzylguanidine (123I-mIBG) has gained clinical momentum. Although the need for standardization of 123I-mIBG myocardial uptake has been recognized, the availability of practical clinical standardization approaches is limited. The need for standardization includes the heart-to-mediastinum ratio (HMR) and washout rate with...

Cross calibration of 123I-meta-iodobenzylguanidine heart-to-mediastinum ratio with D-SPECT planogram and Anger camera

Ishikawa , Hakusan , Japan 1 Department of Nuclear Medicine, Kanazawa University , 13-1 Takara-machi, Kanazawa 920-8641 , Japan 2 & Kenichi Nakajima 3 Department of Neurology, Hokuriku National Hospital ... ; PI, Kenichi Nakajima). Compliance with ethical standards Conflict of interest Kenichi Nakajima collaborates with FUJIFILM RI Pharma Co. Ltd. (Tokyo, Japan), supplier of 123I-MIBG in Japan, to develop

IQ·SPECT technology and its clinical applications using multicenter normal databases

, Japan 2 Department of Nuclear Medicine, Kanazawa University , 13-1 Takara-machi, Kanazawa 920-8641 , Japan 3 Kenichi Nakajima 4 Siemens Medical Solution USA, Inc. , Molecular Imaging, Hoffman Estates, IL

Consumption-based accounting of steel alloying elements and greenhouse gas emissions associated with the metal use: the case of Japan

Metal extraction and smelting cause considerable impacts on the environment. Consumption-based impact accounting highlights the responsibility of metal-consuming industries for the impacts and may drive a system-wide improvement in the structure of related supply chains. To drive the improvements, policies at national level coordinated for respective product types across the...

Comparison of diagnostic performance of four software packages for phase dyssynchrony analysis in gated myocardial perfusion SPECT

Background Phase analysis of gated myocardial perfusion single-photon emission computed tomography (SPECT) for assessment of left ventricular (LV) dyssynchrony was investigated using the following dedicated software packages: Corridor4DM (4DM), cardioREPO (cREPO), Emory Cardiac Toolbox (ECTb), and quantitative gated SPECT (QGS). The purpose of this study was to evaluate the...

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

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 system and conventional quantitation are comparable. Methods The ANN was trained to classify potentially abnormal areas as true or false based on the nuclear cardiology expert interpretation of 1001 gated...

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

Department of Cardiology, Nihon University Hospital , Tokyo , Japan 2 & Kenichi Nakajima 3 Department of Physics, Kanazawa Medical University , Uchinada, Ishikawa , Japan 4 Department of Radiology, National ... Japanese Society of Nuclear Medicine and by Grants-in-Aid for Scientific Research in Japan (PI: Kenichi Nakajima). Emory Cardiac Toolbox was kindly supplied by Syntermed, Inc. (Atlanta, GA, USA) and Corridor

Bottlenecks in material cycle of nickel

Economic growth is associated with a rapid rise in the use of natural resources, and has potential environmental impacts at local and/or global scales. Possible options to control environmental impacts associated with consumption of natural resources include the introduction of easier way to identify the consumption of natural resources and the associated environmental impacts...

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

Received Nov 123 A European myocardial I-mIBG cross-calibration phantom study Derk O. Verschure 2 4 Edwin Poel RN 4 Kenichi Nakajima 3 Koichi Okuda 0 Berthe L.F. van Eck-Smit 4 G. Aernout Somsen 1

Effect of Repetitive Glucose Spike and Hypoglycaemia on Atherosclerosis and Death Rate in Apo E-Deficient Mice

Medicine, 2-1-1 Hongo, Bunkyo-ku, Tokyo 113-8421, Japan Received 12 June 2015; Revised 31 July 2015; Accepted 9 August 2015 Academic Editor: Marco Bugliani Copyright © 2015 Kenichi Nakajima et al. This

Prognostic study of cardiac events in Japanese patients with chronic kidney disease using ECG-gated myocardial Perfusion imaging: Final 3-year report of the J-ACCESS 3 study

BackgroundMyocardial perfusion imaging (MPI) is considered useful for risk stratification among patients with chronic kidney disease (CKD), without renal deterioration by contrast media. Methods and ResultsThe Japanese Assessment of Cardiac Events and Survival Study by Quantitative Gated SPECT (J-ACCESS 3) is a multicenter, prospective cohort study investigating the ability of...

Comparison of phase dyssynchrony analysis using gated myocardial perfusion imaging with four software programs: Based on the Japanese Society of Nuclear Medicine working group normal database

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 normal ranges and factors affecting phase parameters. Methods Normal databases were derived from the Japanese Society of Nuclear Medicine working group (n = 69). The programs were Emory Cardiac Toolbox with...

The use of positron emission tomography/computed tomography imaging in radiation therapy: a phantom study for setting internal target volume of biological target volume

Fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) is an important method for detecting tumours, planning radiotherapy treatment, and evaluating treatment responses. However, using the standardized uptake value (SUV) threshold with PET imaging may be suitable not to determine gross tumour volume but to determine biological target volume (BTV...

Myocardial blood flow quantification with SPECT and conventional tracers: a critical appraisal

Stephan G. Nekolla FESC 1 Christoph Rischpler 1 Kenichi Nakajima PhD 0 0 Department of Nuclear Medicine, Institute of Medical, Pharmacological and Health Sciences, Kanazawa University , Kanazawa