Robust arterial transit time and cerebral blood flow estimation using combined acquisition of Hadamard‐encoded multi‐delay and long‐labeled long‐delay pseudo …

…, N Kosaka, T Matsuda, E Kidoya - NMR in …, 2020 - Wiley Online Library
Arterial transit time (ATT) prolongation causes an error of cerebral blood flow (CBF)
measurement during arterial spin labeling (ASL). To improve the accuracy of ATT and CBF in …

Optimizing scan timing of hepatic arterial phase by physiologic pharmacokinetic analysis in bolus-tracking technique by multi-detector row computed tomography

I Yamaguchi, E Kidoya, M Suzuki, H Kimura - Radiological physics and …, 2011 - Springer
Our aim in this study was to determine an optimal delay time of hepatic arterial phase (HAP)
imaging of hypervascular hepatocellular carcinomas (HCCs) in dynamic contrast-enhanced …

Evaluation of required saline volume in dynamic contrast-enhanced computed tomography using saline flush technique

I Yamaguchi, E Kidoya, M Suzuki, H Kimura - … Medical Imaging and …, 2009 - Elsevier
The present study was performed to find the required volume of physiological saline for
flushing that will allow the most efficient use of contrast medium during the early phase of …

Separating spin compartments in arterial spin labeling using delays alternating with nutation for tailored excitation (DANTE) pulse: A validation study using T2 …

…, Y Matta, N Kosaka, E Kidoya - Magnetic …, 2022 - Wiley Online Library
Purpose To clarify the type of spin compartment in arterial spin labeling (ASL) that is
eliminated by delays alternating with nutation for tailored excitation (DANTE) pulse using T 2 ‐…

[HTML][HTML] Specific Binding Ratio Estimation of [123I]-FP-CIT SPECT Using Frontal Projection Image and Machine Learning

A Kita, H Okazawa, K Sugimoto, N Kosaka, E Kidoya… - Diagnostics, 2023 - mdpi.com
This study aimed to develop a new convolutional neural network (CNN) method for
estimating the specific binding ratio (SBR) from only frontal projection images in single-photon …

Method for determining scan timing based on analysis of formation process of the time-density curve

I Yamaguchi, T Ishida, E Kidoya… - … Gijutsu Gakkai Zasshi, 2005 - europepmc.org
A strict determination of scan timing is needed for dynamic multi-phase scanning and 3D-CT
angiography (3D-CTA) by multi-detector row CT (MDCT). In the present study, contrast …

Operation of bolus tracking system for prediction of aortic peak enhancement at multidetector row computed tomography: pharmacokinetic analysis and clinical study

…, H Hayashi, M Suzuki, K Ichikawa, E Kidoya… - Radiation …, 2008 - Springer
Purpose The present study was performed to identify the theoretical background for optimal
use of the bolus tracking system by analyzing the changes in the initial slope of the aortic …

Estimation of aortic time-enhancement curve in pharmacokinetic analysis: dynamic study by multi-detector row computed tomography

…, H Hayashi, M Suzuki, E Kidoya… - … Gijutsu Gakkai Zasshi, 2007 - europepmc.org
This paper presents an introduction to the development of software that provides a physiologic
model of contrast medium enhancement by incorporating available physiologic data and …

Acquisition count dependence of the specific binding ratio in 123I-FP-CIT SPECT

…, N Kosaka, T Shibutani, M Onoguchi, E Kidoya… - Annals of Nuclear …, 2021 - Springer
Objective In the [ 123 I]FP-CIT single-photon emission computed tomography (SPECT)
examination, the specific binding ratio (SBR), calculated from the ratio of the striatal specific to …

Examining electrometer performance checks with direct‐current generator in a clinic: Assessment of generated charges and implementation of electrometer checks

…, H Oguchi, M Shimizu, E Kidoya… - Journal of Applied …, 2021 - Wiley Online Library
Purpose Medical physicists use a suitable detector connected to an electrometer to measure
radiotherapy beams. Each detector and electrometer has a lifetime (due to physical …