[HTML][HTML] Evaluation of the performance of a high-resolution time-of-flight PET system dedicated to the head and breast according to NEMA NU 2-2012 standard

D Morimoto-Ishikawa, K Hanaoka, S Watanabe… - EJNMMI physics, 2022 - Springer
Background This study evaluated the physical performance of a positron emission tomography
(PET) system dedicated to the head and breast according to the National Electrical …

High-resolution silicon photomultiplier time-of-flight dedicated head PET system for clinical brain studies

…, S Watanabe, D Morimoto-Ishikawa… - Journal of Nuclear …, 2023 - Soc Nuclear Med
We acquired brain 18 F-FDG and 18 F-flutemetamol PET images using a time-of-flight system
dedicated to the head (dhPET) and a conventional whole-body PET/CT (wbPET) system …

Initial evaluation of a new maximum-likelihood attenuation correction factor-based attenuation correction for time-of-flight brain PET

…, K Hanaoka, S Watanabe, D Morimoto-Ishikawa… - Annals of Nuclear …, 2022 - Springer
Aim The aim of this study was to evaluate an image reconstruction algorithm, including a
new maximum-likelihood attenuation correction factor (ML-ACF) for time of flight (TOF) brain …

[HTML][HTML] Organ-Specific Positron Emission Tomography Scanners for Breast Imaging: Comparison between the Performances of Prior and Novel Models

…, C Ikegawa, M Imai, S Watanabe, D Morimoto-Ishikawa… - Diagnostics, 2023 - mdpi.com
The performances of photomultiplier tube (PMT)-based dedicated breast positron emission
tomography (PET) and silicon photomultiplier tube (SiPM)-based time-of-flight (TOF) PET, …

[HTML][HTML] Metabolites alterations and liver injury in hepatic encephalopathy models evaluated by use of 7T-MRI

S Saito, N Arihara, R Sawaya, D Morimoto-Ishikawa… - Metabolites, 2022 - mdpi.com
This study is to observe a thioacetamide (TAA) administered Hepatic encephalopathy (HE)
model rats at three and ten days after TAA administration using liver MRI and brain MR …

Attenuation correction for phantom tests: an alternative to maximum-likelihood attenuation correction factor-based correction for clinical studies in time-of-flight PET

…, K Hanaoka, S Watanabe, D Morimoto-Ishikawa… - Annals of Nuclear …, 2022 - Springer
Objectives This study evaluates the phantom attenuation correction (PAC) method as an
alternative to maximum-likelihood attenuation correction factor (ML-ACF) correction in time-of-…

Comparison between gradient and spin-echo (GRASE) and compressed sensing sequences for single breath-hold three-dimensional magnetic resonance …

D Morimoto-Ishikawa, T Hyodo, M Takenaka… - European Journal of …, 2022 - Elsevier
Purpose To compare image quality and the detectability of gallstones in patients with T 1
hyperintense bile between single breath-hold three-dimensional (3D) magnetic resonance …

Impact of respiratory gating and ECG gating on 18F-FDG PET/CT for cardiac sarcoidosis

K Hanaoka, S Watanabe, D Morimoto-Ishikawa… - Journal of Nuclear …, 2023 - Elsevier
Background The aim of this study was to estimate the impact of respiratory and electrocardiogram
(ECG)-gated FDG positron emission tomography (PET)/computed tomography (CT) on …

Generating PET Attenuation Maps via Sim2Real Deep Learning–Based Tissue Composition Estimation Combined with MLACF

…, K Hanaoka, S Watanabe, D MorimotoIshikawa… - Journal of Imaging …, 2024 - Springer
Deep learning (DL) has recently attracted attention for data processing in positron emission
tomography (PET). Attenuation correction (AC) without computed tomography (CT) data is …

Comparison of lesion detectability of dedicated breast PET and whole-body PET/CT

K Hanaoka, S Watanabe, D Morimoto-Ishikawa… - 2022 - Soc Nuclear Med
4111 Introduction: Metabolic imaging of the primary breast tumor with 18F-fluorodeoxyglucose
(FDG) PET may assist in predicting treatment response. Dedicated breast PET (dbPET) …