Faculty Profiles - OKUDA KOICHI

Papers - OKUDA KOICHI

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Detectability of cold tumors by xSPECT bone technology compared with hot tumors: a supine phantom study.

Takayuki Shibutani, Takahiro Konishi, Hajime Ichikawa, Masahisa Onoguchi, Hiroto Yoneyama, Toshimune Ito, Koichi Okuda, Kenichi Nakajima

Physical and engineering sciences in medicine 2023.12

Phantom-Based Standardization Method for 123I-meta-iodobenzylguanidine Heart-to-Mediastinum Ratio Validated by D-SPECT Versus Anger Camera

Yamashita S, Nakajima K, Okuda K, Yamamoto H, Shibutani T, Yoneyama T, Tsuji S, Yokoyama K

Ann Nucl Cardiol. 9 ( 1 ) 85 - 90 2023.8

Feasibility of using counts-per-volume approach with a new SPECT phantom to optimize the relationship between administered dose and acquisition time.

Hajime Ichikawa, Takayuki Shibutani, Hideki Shimada, Koichi Okuda, Toyohiro Kato, Hiroki Nosaka, Akio Nagaki, Masahisa Onoguchi

Radiological physics and technology 16 ( 2 ) 244 - 253 2023.6

Modified signal-to-noise ratio in the liver using the background-to-lung activity ratio to assess image quality of whole-body F-18-fluorodeoxyglucose positron emission tomography

Yamashita Shozo, Okuda Koichi, Nakaichi Tetsu, Yamamoto Haruki, Yoneyama Tatsuya, Yokoyama Kunihiko

RADIOLOGICAL PHYSICS AND TECHNOLOGY 16 ( 1 ) 94 - 101 2023.3

Machine learning-based prediction of conversion coefficients for I-123 metaiodobenzylguanidine heart-to-mediastinum ratio

Okuda Koichi, Nakajima Kenichi, Kitamura Chiemi, Ljungberg Michael, Hosoya Tetsuo, Kirihara Yumiko, Hashimoto Mitsumasa

JOURNAL OF NUCLEAR CARDIOLOGY 30 ( 4 ) 1630 - 1641 2023.2

Comparison of Taiwanese and European Calibration Factors for Heart-to-Mediastinum Ratio in Multicenter (123)I-mIBG Phantom Studies.

Okuda K, Nakajima K, Hung GU, Wu HT, Verschure DO, Verberne HJ, Kitamura C

Annals of nuclear cardiology 9 ( 1 ) 54 - 60 2023

[Trends and Future Prospects of AI Technology Utilization Research in JSRT　 -Challenges to Tackle and the Expected Role of Our Academic Society !?].

Kawashita I, Hayashi N, Tominaga M, Fujibuchi T, Magome T, Yagahara A, Okuda K, Shinohara N

Nihon Hoshasen Gijutsu Gakkai zasshi 79 ( 8 ) 838 - 850 2023

心臓専用半導体検出器ガンマカメラの再構成法が虚血診断能に与える影響について

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

核医学技術 42 ( 予稿集 ) 346 - 346 2022.8

Beads phantom for evaluating heterogeneity of SUV on 18F-FDG PET images.

Koichi Okuda, Hisahiro Saito, Shozo Yamashita, Haruki Yamamoto, Hajime Ichikawa, Toyohiro Kato, Kunihiko Yokoyama, Mariko Doai, Mitsumasa Hashimoto, Munetaka Matoba

Annals of nuclear medicine 36 ( 5 ) 495 - 503 2022.5

心臓専用半導体検出器ガンマカメラと3検出器型ガンマカメラの虚血診断能の比較冠動脈造影の結果との比較

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

日本心臓核医学会ニュースレター 24 ( 2 ) 95 - 95 2022.5

心臓専用半導体検出器ガンマカメラと3検出器型ガンマカメラの虚血診断能の比較心筋ファントムによる検証

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

日本心臓核医学会ニュースレター 24 ( 2 ) 94 - 94 2022.5

Clinical Validation of Japanese Normal Myocardial Perfusion Imaging Databases Using Semi-conductor Gamma Camera (D-SPECT): Japanese Society of Nuclear Cardiology Working Group Reports.

Matsumoto N, Sugai S, Suzuki Y, Iguchi N, Nanasato M, Kiso K, Taniguchi Y, Yoneyama T, Okuda K, Nakajima K

Annals of nuclear cardiology 8 ( 1 ) 36 - 41 2022

[[Nuclear Medicine] 6. Digital Phantoms for Nuclear Medicine].

Okuda K

Nihon Hoshasen Gijutsu Gakkai zasshi 78 ( 8 ) 871 - 875 2022

Normal and Range Value Evaluations Using Heart Risk View-Function Based on the Japanese Societyof Nuclear Medicine Working Group Database.

Kosuke Tatsuno, Koichi Okuda, Kenichi Nakajima, Hisahiro Saito, Takayuki Shibutani, Masahisa Onoguchi, Tomoko Takahashi, Takafumi Mochizuki, Naoto Watanabe, Munetaka Matoba

Annals of nuclear cardiology 8 ( 1 ) 51 - 56 2022

Should Artifacts of the Inferior Wall Be Reduced Using Image Processing?

Koichi Okuda, Kenichi Nakajima, Takayuki Shibutani

Annals of nuclear cardiology 8 ( 1 ) 4 - 6 2022

The utility of heart-to-mediastinum ratio using a planar image created from IQ-SPECT with Iodine-123 meta-iodobenzylguanidine.

Takayuki Shibutani, Kenichi Nakajima, Hiroto Yoneyama, Takahiro Konishi, Koichi Okuda, Masahisa Onoguchi, Seigo Kinuya

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology 28 ( 6 ) 2569 - 2577 2021.12

Validation of Simulation Codes for Nuclear Imaging Using Digital Phantoms

奥田光一, 野坂広樹, 伊東利宗, 松友紀和, 市川肇, 白川誠士, 山木範泰, 菊池明泰, 對間博之, LJUNGBERG Michael

日本放射線技術学会雑誌 77(1) ( 1 ) 41 - 47 2021.12

心臓専用半導体検出器ガンマカメラと3検出器型ガンマカメラの虚血診断能の比較冠動脈造影の結果との比較

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

核医学技術 41 ( 予稿集 ) 399 - 399 2021.10

骨シンチグラフィにおける投与量の違いが読影医の視覚評価に与える影響

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

核医学技術 41 ( 予稿集 ) 416 - 416 2021.10

Olfactory Neuronal Damage in Central Neurological Disorders and Post-Upper Respiratory Infection Hyposmia

Shiga Hideaki, Okuda Koichi, Taki Junichi, Watanabe Naoto, Tonami Hisao, Kinuya Seigo, Miwa Takaki

CHEMICAL SENSES 46 2021.9

Verification of phantom accuracy using a Monte Carlo simulation: bone scintigraphy chest phantom

Toshimune Ito, Hirotatsu Tsuchikame, Hajime Ichikawa, Masahisa Onoguchi, Koichi Okuda, Takayuki Shibutani, Noriyo Yokotsuka, Hiroshi Tomizawa

Radiological Physics and Technology 14 ( 3 ) 336 - 344 2021.9

Comparison of Myocardial Ischemia Detection Between Semiconductor and Conventional Anger-type Three-detector SPECT

Yoneyama Hiroto, Nakajima Kenichi, Taki Junichi, Wakabayashi Hiroshi, Konishi Takahiro, Shibutani Takayuki, Okuda Koichi, Onoguchi Masahisa

Annals of Nuclear Cardiology 7 ( 1 ) 49 - 56 2021.8

What does diagnostic threshold mean? Deterministic and probabilistic considerations

Nakajima K, Okuda K, Komatsu J

J Nucl Cardiol 28 ( 4 ) 1702 - 1706 2021.8

Demystifying dyssynchrony for diagnosis and prognosis: Tips for measuring heterogeneous phase distribution

Nakajima K, Okuda K, Maruyama K

J Nucl Cardiol 28 ( 3 ) 1064 - 1067 2021.6

123I-MIBGの心縦隔比の標準化 : 15年間の取組みと今後の展望

奥田光一,中嶋憲一,北村千枝美

Rad fan 19 ( 6 ) 24 - 28 2021.4

Texture Feature Comparison Between Step-and-Shoot and Continuous-Bed-Motion 18F-FDG PET.

Shozo Yamashita, Koichi Okuda, Tetsu Nakaichi, Haruki Yamamoto, Kunihiko Yokoyama

Journal of nuclear medicine technology 49 ( 1 ) 58 - 64 2021.3

Metal artifact reduction for improving quantitative SPECT/CT imaging.

Takahiro Konishi, Takayuki Shibutani, Koichi Okuda, Hiroto Yoneyama, Riku Moribe, Masahisa Onoguchi, Kenichi Nakajima, Seigo Kinuya

Annals of nuclear medicine 35 ( 3 ) 291 - 298 2021.3

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

Toshimune Ito, Yohji Matsusaka, Masahisa Onoguchi, Hajime Ichikawa, Koichi Okuda, Takayuki Shibutani, Masaaki Shishido, Kozo Sato

Journal of applied clinical medical physics 22 ( 2 ) 165 - 177 2021.2

What does entropy reveal in phase analysis of myocardial perfusion SPECT?

Okuda K, Nakajima K.

Journal of Nuclear Cardiology 28 ( 1 ) 172 - 174 2021.2

Current state of oncologic 18F-FDG PET/CT in Japan: A nationwide survey.

Hajime Ichikawa, Toyohiro Kato, Kenta Miwa, Takayuki Shibutani, Koichi Okuda, Akio Nagaki, Hiroyuki Tsushima, Masahisa Onoguchi

Asia Oceania journal of nuclear medicine & biology 9 ( 2 ) 158 - 166 2021

Validation of Simulation Codes for Nuclear Imaging Using Digital Phantoms

Okuda Koichi, Nosaka Hiroki, Ito Toshimune, Matsutomo Norikazu, Ichikawa Hajime, Shirakawa Seiji, Yamaki Noriyasu, Kikuchi Akihiro, Tsushima Hiroyuki, Ljungberg Michael

Japanese Journal of Radiological Technology 77 ( 1 ) 41 - 47 2021

Calibrated scintigraphic imaging procedures improve quantitative assessment of the cardiac sympathetic nerve activity

Koichi Okuda, Kenichi Nakajima, Chiemi Kitamura, Yumiko Kirihara, Mitsumasa Hashimoto, Seigo Kinuya

Scientific reports 10 ( 1 ) 21834 - 21834 2020.12

モンテカルロシミュレーションによるファントム精度検証骨SPECT評価用ファントム

伊東利宗, 小野口昌久, 市川肇, 奥田光一, 菊池明泰, 澁谷孝行, 宍戸正明, 土亀弘達, 前野貴史

核医学技術 40 ( 予稿集 ) 347 - 347 2020.10

骨シンチグラフィにおけるSwiftScan planar処理パラメータと撮像時間の違いが骨シンチ診断支援ソフトの定量値に与える影響

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

核医学技術 40 ( 予稿集 ) 360 - 360 2020.10

心臓専用半導体検出器ガンマカメラと3検出器ガンマカメラの虚血診断能の比較心筋ファントムによる検証

米山寛人, 中嶋憲一, 小西貴広, 奥田光一, 澁谷孝行, 小野口昌久

核医学技術 40 ( 予稿集 ) 345 - 345 2020.10

Has the era of dual-gated myocardial perfusion SPECT and PET arrived?

Koichi Okuda, Kenichi Nakajima

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology 27 ( 2 ) 648 - 650 2020.4

Imaging technology for myocardial perfusion single-photon emission computed tomography 2018 in Japan.

Takayuki Shibutani, Koichi Okuda, Hajime Ichikawa, Toyohiro Kato, Kenta Miwa, Hiroyuki Tsushima, Masahisa Onoguchi, Akio Nagaki

Japanese journal of radiology 38 ( 3 ) 274 - 282 2020.3

Study of novel deformable image registration in myocardial perfusion single-photon emission computed tomography.

Toshimune Ito, Masahisa Onoguchi, Koichi Okuda, Takayuki Shibutani

Nuclear medicine communications 41 ( 3 ) 196 - 205 2020.3

国内の核医学検査における追加撮像の実態調査

加藤豊大, 市川肇, 三輪建太, 奥田光一, 澁谷孝行, 長木昭男, 對間博之

日本放射線技術学会雑誌 76 ( 3 ) 285 - 294 2020.3

Serial examination of cardiac function and perfusion in growing rats using SPECT/CT for small animals.

Tomo Hiromasa, Junichi Taki, Hiroshi Wakabayashi, Anri Inaki, Koichi Okuda, Takayuki Shibutani, Kazuhiro Shiba, Seigo Kinuya

Scientific reports 10 ( 1 ) 160 - 160 2020.1

Serial examination of cardiac function and perfusion in growing rats using SPECT/CT for small animals

Hiromasa Tomo, Taki Junichi, Wakabayashi Hiroshi, Inaki Anri, Okuda Koichi, Shibutani Takayuki, Shiba Kazuhiro, Kinuya Seigo, 廣正智, 瀧淳一, 若林大志, 稲木杏吏, 澁谷孝行, 柴和弘, 絹谷清剛

Scientific Reports 10 ( 1 ) 160 2020.1

Current state of bone scintigraphy protocols and practice in Japan.

Hajime Ichikawa, Kenta Miwa, Koichi Okuda, Takayuki Shibutani, Toyohiro Kato, Akio Nagaki, Hiroyuki Tsushima, Masahisa Onoguchi

Asia Oceania journal of nuclear medicine & biology 8 ( 2 ) 116 - 122 2020

Application of the Texture Analysis in Nuclear Cardiology

Okuda Koichi, Nakajima Kenichi, Yamashita Shozo, Saito Hisahiro, Hashimoto Mitsumasa

SHINZO KAKU IGAKU 22 ( 1 ) 4 - 5 2020

A Nationwide Survey on Additional Scan in Nuclear Medicine Imaging

Kato Toyohiro, Ichikawa Hajime, Miwa Kenta, Okuda Koichi, Shibutani Takayuki, Nagaki Akio, Tsushima Hiroyuki

Japanese Journal of Radiological Technology 76 ( 3 ) 285 - 294 2020

Impact of iterative reconstruction with resolution recovery in myocardial perfusion SPECT: phantom and clinical studies.

Koichi Okuda, Kenichi Nakajima, Hiroto Yoneyama, Takayuki Shibutani, Masahisa Onoguchi, Shinro Matsuo, Mitsumasa Hashimoto, Seigo Kinuya

Scientific reports 9 ( 1 ) 19618 - 19618 2019.12

Preliminary quantitative evaluation of radiation-induced DNA damage in peripheral blood lymphocytes after cardiac dual-isotope imaging

Koichi Okuda, Naoto Watanabe, Mitsumasa Hashimoto, Mariko Doai, Yasuyuki Kawai, Tomoko Takahashi, Tomohiro Arikawa, Kazumasa Ooiso, Yumi Sunatani, Kuniyoshi Iwabuchi, Koji Kajinami, Munetaka Matoba

Applied Radiation and Isotopes 154 108890 - 108890 2019.12

Nasal thallium-201 uptake in patients with parosmia with and without hyposmia after upper respiratory tract infection.

Shiga H, Okuda K, Taki J, Watanabe N, Tonami H, Kinuya S, Miwa T

International forum of allergy & rhinology 9 ( 11 ) 1252 - 1256 2019.11

Ability of artificial intelligence to diagnose coronary artery stenosis using hybrid images of coronary computed tomography angiography and myocardial perfusion SPECT

Yoneyama H., Nakajima K., Taki J., Wakabayashi H., Konishi T., Okuda K., Shiburani T., Onoguchi M., Kinuya S.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 46 ( SUPPL 1 ) S103 - S104 2019.10

Quantitative accuracy of standardized uptake value (SUV) for xSPECT Bone technology using new supine phantom

Shibutani T., Onoguchi M., Konishi T., Yoneyama H., Ichikawa H., Okuda K., Nakajima K.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 46 ( SUPPL 1 ) S878 - S878 2019.10

The effect of metal artifact reduction on quantitative SPECT/CT imaging

Konishi T., Shibutani T., Okuda K., Yoneyama H., Moribe R., Onoguchi M., Nakajima K., Kinuya S.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 46 ( SUPPL 1 ) S873 - S873 2019.10

核医学研究におけるシミュレーション実験ディジタルファントムを使用したシミュレーションの精度比較

奥田光一, 野坂広樹, 伊東利宗, 白川誠士, 市川肇, 松友紀和, 菊池明泰

日本放射線技術学会雑誌 75 ( 9 ) 1071 - 1071 2019.9

Prognostic Value of Early Evaluation of Left Ventricular Dyssynchrony After Myocardial Infarction.

Wakabayashi H, Taki J, Inaki A, Hiromasa T, Yamase T, Akatani N, Okuda K, Shibutani T, Shiba K, Kinuya S

Molecular imaging and biology : MIB : the official publication of the Academy of Molecular Imaging 21 ( 4 ) 654 - 659 2019.8

"Deformable Image Registration" New Images Registration of Myocardial Perfusion SPECT

Ito Toshimune, Onoguchi Masahisa, Okuda Koichi, Shibutani Takayuki

JOURNAL OF NUCLEAR MEDICINE 60 2019.5

"Deformable Image Registration" New Images Registration of Myocardial Perfusion SPECT

Ito Toshimune, Onoguchi Masahisa, Okuda Koichi, Shibutani Takayuki

JOURNAL OF NUCLEAR MEDICINE 60 2019.5

Preliminary evaluation of texture analysis on myocardial pe sion SPECT a digital cardiac phantom study

Okuda Koichi, Nakajima Kenichi, Saito Hisahiro, Ito Toshimune, Kikuchi Akihiro, Yoneyama Hiroto, Shibutani Takayuki, Onoguchi Masahisa, Matsuo Shinro, Hashimoto Mitsumasa, Kinuya Seigo

JOURNAL OF NUCLEAR MEDICINE 60 2019.5

Preliminary evaluation of texture analysis on myocardial pe sion SPECT a digital cardiac phantom study

Okuda Koichi, Nakajima Kenichi, Saito Hisahiro, Ito Toshimune, Kikuchi Akihiro, Yoneyama Hiroto, Shibutani Takayuki, Onoguchi Masahisa, Matsuo Shinro, Hashimoto Mitsumasa, Kinuya Seigo

JOURNAL OF NUCLEAR MEDICINE 60 2019.5

Phase dyssynchrony and (123)I-meta-iodobenzylguanidine innervation imaging towards standardization.

Nakajima K, Okuda K, Verberne HJ

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology 26 ( 2 ) 519 - 523 2019.4

Phase dyssynchrony and 123I-meta-iodobenzylguanidine innervation imaging towards standardization

Nakajima Kenichi, Okuda Koichi, Verberne Hein J.

JOURNAL OF NUCLEAR CARDIOLOGY 26 ( 2 ) 519 - 523 2019.4

Accuracy of an artificial neural network for detecting a regional abnormality in myocardial perfusion SPECT.

Shibutani Takayuki, Nakajima Kenichi, Wakabayashi Hiroshi, Mori Hiroshi, Matsuo Shinro, Yoneyama Hiroto, Konishi Takahiro, Okuda Koichi, Onoguchi Masahisa, Kinuya Seigo, 澁谷孝行, 中嶋憲一, 若林大志, 松尾信郎, 米山寛人, 小野口昌久, 絹谷清剛

Annals of Nuclear Medicine 33 ( 2 ) 86 - 92 2019.2

Accuracy of an artificial neural network for detecting a regional abnormality in myocardial perfusion SPECT.

Shibutani T, Nakajima K, Wakabayashi H, Mori H, Matsuo S, Yoneyama H, Konishi T, Okuda K, Onoguchi M, Kinuya S

Annals of nuclear medicine 33 ( 2 ) 86 - 92 2019.2

Making the invisible visible: Phase dyssynchrony has potential as a new prognostic marker

Kenichi Nakajima, Koichi Okuda, Shinro Matsuo, Piotr Slomka

Journal of Nuclear Cardiology 26 ( 1 ) 298 - 302 2019.2

シミュレーション技術の心臓核医学への展開

奥田光一, 橋本光正, 中嶋憲一

核医学技術 39 130 2019.1

Ability of artificial intelligence to diagnose coronary artery stenosis using hybrid images of coronary computed tomography angiography and myocardial perfusion SPECT

Yoneyama H, Nakajima K, Taki J, Wakabayashi H, Matsuo S, Konishi T, Okuda K, Shibutani T, Onoguchi M, Kinuya S

Eur J Hybrid Imaging 3 ( 1 ) 4 - 4 2019

10. Simulation of Nuclear Medicine Experiments Using ImageJ

Okuda Koichi, Ito Toshimune

Japanese Journal of Radiological Technology 75 ( 10 ) 1205 - 1210 2019

心筋シンチグラフィにおけるγH2AXを用いた末梢血リンパ球の放射線障害の評価

奥田光一, 渡邉直人, 橋本光正, 道合万里子, 河合康幸, 高橋知子, 有川智博, 大磯一誠, 砂谷優実, 岩淵邦芳, 梶波康二

核医学 55 ( Suppl. ) S216 - S216 2018.11

心筋画像における深層学習を応用した心外集積除去法の基礎検討

菊池明泰, 本間優斗, 岡田光騎, 川上敬, 中嶋憲一, 奥田光一, 北間正崇

核医学技術 38 ( 予稿集 ) 462 - 462 2018.10

核医学検査における追加撮像の実態調査

市川肇, 加藤豊大, 澁谷孝行, 奥田光一, 三輪建太, 長木昭男, 對間博之

日本放射線技術学会雑誌 74 ( 9 ) 960 - 960 2018.9

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

Verschure Derk O, Poel Edwin, Nakajima Kenichi, Okuda Koichi, van Eck-Smit Berthe L F, Somsen G Aernout, Verberne Hein J

JOURNAL OF NUCLEAR CARDIOLOGY 25 ( 4 ) 1191 - 1197 2018.8

Creation and characterization of normal myocardial perfusion imaging databases using the IQ·SPECT system.

Okuda K, Nakajima K, Matsuo S, Kondo C, Sarai M, Horiguchi Y, Konishi T, Onoguchi M, Shimizu T, Kinuya S

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology 25 ( 4 ) 1328 - 1337 2018.8

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

Verschure Derk O., Poel Edwin, Nakajima Kenichi, Okuda Koichi, van Eck-Smit Berthe L. F., Somsen G. Aernout, Verberne Hein J.

JOURNAL OF NUCLEAR CARDIOLOGY 25 ( 4 ) 1191 - 1197 2018.8

Quantification of Myocardial Perfusion Defect Size in Rats: Comparison between Quantitative Perfusion SPECT and Autoradiography.

Wakabayashi H, Taki J, Inaki A, Hiromasa T, Okuda K, Shibutani T, Shiba K, Kinuya S

Molecular imaging and biology : MIB : the official publication of the Academy of Molecular Imaging 20 ( 4 ) 544 - 550 2018.8

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

Nakajima K, Okuda K, Watanabe S, Matsuo S, Kinuya S, Toth K, Edenbrandt L

Annals of nuclear medicine 32 ( 5 ) 303 - 310 2018.6

The impact of myocardial counts and cardiac frames on phase analysis of gated myocardial perfusion SPECT

Tatami Ringo, Onoguchi Masahisa, Shibutani Takayuki, Yoneyama Hiroto, Okuda Koichi, Nakajima Kenichi

JOURNAL OF NUCLEAR MEDICINE 59 2018.5

The impact of myocardial counts and cardiac frames on phase analysis of gated myocardial perfusion SPECT

Tatami Ringo, Onoguchi Masahisa, Shibutani Takayuki, Yoneyama Hiroto, Okuda Koichi, Nakajima Kenichi

JOURNAL OF NUCLEAR MEDICINE 59 2018.5

Correlation of nasal thallium migration to olfactory bulb and olfactory bulb volume in patients with olfactory impairment after upper respiratory infection

Shiga Hideaki, Taki Junichi, Okuda Koichi, Watanabe Naoto, Tonami Hisao, Kinuya Seigo, Miwa Takaki

CHEMICAL SENSES 43 ( 4 ) E54 - E54 2018.5

Correlation of nasal thallium migration to olfactory bulb and olfactory bulb volume in patients with olfactory impairment after upper respiratory infection

Hideaki Shiga, Junichi Taki, Koichi Okuda, Naoto Watanabe, Hisao Tonami, Seigo Kinuya, Takaki Miwa

CHEMICAL SENSES 43 ( 4 ) E54 - E54 2018.5

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

Nakajima K, Okuda K, Matsuo S, Wakabayashi H, Kinuya S

Annals of nuclear medicine 32 ( 3 ) 175 - 181 2018.4

オルファクトシンチによる嗅覚障害の予後診断

32 67 - 68 2018.4

Influence of ROI definition on the heart-to-mediastinum ratio in planar 123I-MIBG imaging

Klene Christiane, Jungen Christiane, Okuda Koichi, Kobayashi Yuske, Helberg Annabelle, Mester Janos, Meyer Christian, Nakajima Kenichi

JOURNAL OF NUCLEAR CARDIOLOGY 25 ( 1 ) 208 - 216 2018.2

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

Verschure Derk O, Poel Edwin, Nakajima Kenichi, Okuda Koichi, van Eck-Smit Berthe L F, Somsen G Aernout, Verberne Hein J

Journal of nuclear cardiology * * 2018

Evaluation of left ventricular dyssynchrony by phase analysis in gated myocardial perfusion SPECT: Comparison of four software programs

Okuda, Koichi, Nakajima, Kenichi, Matsuo, Shinro, Soichiro, Kashiwaya, Yoneyama, Hiroto, Shibutani, Takayuki, Onoguchi, Masahisa, Hashimoto, Mitsumasa, Kinuya, Seigo

JOURNAL OF NUCLEAR MEDICINE 58 * 2018

Ability of the prognostic model of J-ACCESS study to predict cardiac events in a clinical setting: The APPROACH study

Aburadani Isao, Usuda Kazuo, Sumiya Hisashi, Sakagami Satoru, Kiyokawa Hiroaki, Matsuo Shinro, Takamura Masayuki, Murai Hisayoshi, Takashima Shinichiro, Kitano Teppei, Okuda Koichi, Nakajima Kenichi

JOURNAL OF CARDIOLOGY 72 ( 1-2 ) 81 - 86 2018

IQ・SPECTによる心臓核医学 (全文)

2018 1 - 20 2018

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

Nakajima K, Kudo T, Nakata T, Kiso K, Kasai T, Taniguchi Y, Matsuo S, Momose M, Nakagawa M, Sarai M, Hida S, Tanaka H, Yokoyama K, Okuda K, Edenbrandt L

European journal of nuclear medicine and molecular imaging 44 ( 13 ) 2280 - 2289 2017.12

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

Kenichi Nakajima, Takashi Kudo, Tomoaki Nakata, Keisuke Kiso, Tokuo Kasai, Yasuyo Taniguchi, Shinro Matsuo, Mitsuru Momose, Masayasu Nakagawa, Masayoshi Sarai, Satoshi Hida, Hirokazu Tanaka, Kunihiko Yokoyama, Koichi Okuda, Lars Edenbrandt

European journal of nuclear medicine and molecular imaging 44 ( 13 ) 2280 - 2289 2017.12

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

Nakajima Kenichi, Kudo Takashi, Nakata Tomoaki, Kiso Keisuke, Kasai Tokuo, Taniguchi Yasuyo, Matsuo Shinro, Momose Mitsuru, Nakagawa Masayasu, Sarai Masayoshi, Hida Satoshi, Tanaka Hirokazu, Yokoyama Kunihiko, Okuda Koichi, Edenbrandt Lars

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 44 ( 13 ) 2280 - 2289 2017.12

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

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 44 ( 13 ) 2280 - 2289 2017.12

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

Nakajima K, Okuda K, Momose M, Matsuo S, Kondo C, Sarai M, Shibutani T, Onoguchi M, Shimizu T, Vija AH

Annals of nuclear medicine 31 ( 9 ) 649 - 659 2017.11

Cross calibration of123I-meta-iodobenzylguanidine heart-to-mediastinum ratio with D-SPECT planogram and Anger camera

Nakajima, K., Okuda, K., Yokoyama, K., Yoneyama, T., Tsuji, S., Oda, H., Yoshita, M., Kubota, K.

Annals of Nuclear Medicine 31 ( 8 ) 605 - 615 2017.10

The quantitative SPECT/CT scoring of MIBG cardiac scintigraphy to identify patients with Lewy body diseases

Matsuo S., Wakabayashi H., Nakajima K., Okuda K., Yoneyama H., Kinuya S.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 44 S439 - S440 2017.10

Phase dyssynchrony and 123I-meta-iodobenzylguanidine innervation imaging towards standardization

Kenichi Nakajima, Koichi Okuda, Hein J. Verberne

Journal of Nuclear Cardiology * 1 - 5 2017.9

Phase dyssynchrony and 123I-meta-iodobenzylguanidine innervation imaging towards standardization.

Nakajima K, Okuda K, Verberne HJ

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology 2017.9

Validation of Left Ventricular Ejection Fraction with the IQ•SPECT System in Small-Heart Patients.

Yoneyama H, Shibutani T, Konishi T, Mizutani A, Hashimoto R, Onoguchi M, Okuda K, Matsuo S, Nakajima K, Kinuya S

Journal of nuclear medicine technology 45 ( 3 ) 201 - 207 2017.9

Validation of Left Ventricular Ejection Fraction with the IQ•SPECT System in Small-Heart Patients.

Yoneyama H, Shibutani T, Konishi T, Mizutani A, Hashimoto R, Onoguchi M, Okuda K, Matsuo S, Nakajima K, Kinuya S

Journal of nuclear medicine technology 45 ( 3 ) 201 - 207 2017.9

Reducing the small-heart effect in pediatric gated myocardial perfusion single-photon emission computed tomography

Yoneyama Hiroto, Nakajima Kenichi, Okuda Koichi, Matsuo Shinro, Onoguchi Masahisa, Kinuya Seigo, Edenbrandt Lars

Journal of Nuclear Cardiology 24 ( 4 ) 1378 - 1388 2017.8

Reducing the small-heart effect in pediatric gated myocardial perfusion single-photon emission computed tomography

Hiroto Yoneyama, Kenichi Nakajima, Koichi Okuda, Shinro Matsuo, Masahisa Onoguchi, Seigo Kinuya, Lars Edenbrandt

JOURNAL OF NUCLEAR CARDIOLOGY 24 ( 4 ) 1378 - 1388 2017.8

IQ-SPECT for thallium-201 myocardial perfusion imaging: effect of normal databases on quantification

Konishi Takahiro, Nakajima Kenichi, Okuda Koichi, Yoneyama Hiroto, Matsuo Shinro, Shibutani Takayuki, Onoguchi Masahisa, Kinuya Seigo

ANNALS OF NUCLEAR MEDICINE 31 ( 6 ) 454 - 461 2017.7

IQ-SPECT for thallium-201 myocardial perfusion imaging: effect of normal databases on quantification.

Konishi T, Nakajima K, Okuda K, Yoneyama H, Matsuo S, Shibutani T, Onoguchi M, Kinuya S

Annals of nuclear medicine 31 ( 6 ) 454 - 461 2017.7

IQ-SPECT for thallium-201 myocardial perfusion imaging: effect of normal databases on quantification.

Konishi T, Nakajima K, Okuda K, Yoneyama H, Matsuo S, Shibutani T, Onoguchi M, Kinuya S

Annals of nuclear medicine 31 ( 6 ) 454 - 461 2017.7

Prognostic value of olfactory nerve damage measured with thallium-based olfactory imaging in patients with idiopathic olfactory dysfunction

Hideaki Shiga, Junichi Taki, Koichi Okuda, Naoto Watanabe, Hisao Tonami, Hideaki Nakagawa, Seigo Kinuya, Takaki Miwa

SCIENTIFIC REPORTS 7 ( 1 ) 1 2017.6

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

Kenichi Nakajima, Derk O. Verschure, Koichi Okuda, Hein J. Verberne

Clinical and Translational Imaging 5 ( 3 ) 255 - 263 2017.6

Evaluation of left ventricular dyssynchrony by phase analysis in gated myocardial perfusion SPECT: Comparison of four software programs

Okuda Koichi, Nakajima Kenichi, Matsuo Shinro, Soichiro Kashiwaya, Yoneyama Hiroto, Shibutani Takayuki, Onoguchi Masahisa, Hashimoto Mitsumasa, Kinuya Seigo

JOURNAL OF NUCLEAR MEDICINE 58 2017.5

Evaluation of left ventricular dyssynchrony by phase analysis in gated myocardial perfusion SPECT: Comparison of four software programs

Koichi Okuda, Kenichi Nakajima, Shinro Matsuo, Kashiwaya Soichiro, Hiroto Yoneyama, Takayuki Shibutani, Masahisa Onoguchi, Mitsumasa Hashimoto, Seigo Kinuya

JOURNAL OF NUCLEAR MEDICINE 58 2017.5

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

Kenichi Nakajima, Koichi Okuda, Shinro Matsuo, Keisuke Kiso, Seigo Kinuya, Ernest V. Garcia

JOURNAL OF NUCLEAR CARDIOLOGY 24 ( 2 ) 611 - 621 2017.4

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

Koichi Okuda, Kenichi Nakajima, Shinro Matsuo, Soichiro Kashiwaya, Hiroto Yoneyama, Takayuki Shibutani, Masahisa Onoguchi, Mitsumasa Hashimoto, Seigo Kinuya

EJNMMI RESEARCH 7 ( 27 ) - - - 2017.3

総合人間科学放射線生物学実習「染色体標本の作製及び放射線照射による染色体構造異常の観察」を通して学ぶ細胞生物学

44 39 - 48 2017.2

総合人間科学放射線生物学入門について

44 33 - 38 2017.2

123I-meta-iodobenzylguanidine Sympathetic Nerve Function Indices Derived from Planar Images

Kenichi Nakajima, Koichi Okuda

Annals of Nuclear Cardiology 3 ( 1 ) 200 - 202 2017

123I-meta-iodobenzylguanidine Sympathetic Nerve Function Indices Derived from Planar Images

Nakajima Kenichi, Okuda Koichi

Annals of Nuclear Cardiology 3 ( 1 ) 200 - 202 2017

Cardiac and Respiratory Motion-induced Artifact in Myocardial Perfusion SPECT

Okuda Koichi, Nakajima Kenichi, Kikuchi Akihiro, Onoguchi Masahisa, Hashimoto Mitsumasa

Annals of Nuclear Cardiology 3 ( 1 ) 88 - 93 2017

123I-meta-iodobenzylguanidine Sympathetic Nerve Function Indices Derived from Planar Images

Kenichi Nakajima, Koichi Okuda

Annals of Nuclear Cardiology 3 ( 1 ) 200 - 202 2017

IQ-SPECT for thallium-201 myocardial perfusion imaging: effect of normal databases on quantification.

Konishi Takahiro, Nakajima Kenichi, Okuda Koichi, Yoneyama Hiroto, Matsuo Shinro, Shibutani Takayuki, Onoguchi Masahisa, Kinuya Seigo

Annals of nuclear medicine 31 ( 6 ) 454 - 461 2017

Validation of the Left Ventricular Ejection Fraction with the IQ•SPECT System in Small-Heart Patients.

Yoneyama Hiroto, Shibutani Takayuki, Konishi Takahiro, Mizutani Asuka, Hashimoto Ryosuke, Onoguchi Masahisa, Okuda Koichi, Matsuo Shinro, Nakajima Kenichi, Kinuya Seigo

Journal of nuclear medicine technology 45 ( 3 ) * 2017

Normal Values and Gender Differences of Left Ventricular Functional Parameters with CardioREPO Software

Okuda Koichi, Nakajima Kenichi

Annals of Nuclear Cardiology 3 ( 1 ) 29 - 33 2017

Modulation of Unfolded Protein Response by Methylmercury.

Hiraoka H, Nakahara K, Kaneko Y, Akiyama S, Okuda K, Iwawaki T, Fujimura M, Kumagai Y, Takasugi N, Uehara T

Biological & pharmaceutical bulletin 40 ( 9 ) 1595 - 1598 2017

A European phantom study to cross-calibrate myocardial 123I-mIBG scintigraphy

Poel E., Verschure D. O., Nakajima K., Okuda K., van Eck-Smit B. L. F., Somsen G. A., Verberne H. J.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 43 S67 - S68 2016.10

Characteristics of gamma cameras with medium-energy-type collimators in cardiac 123I-MIBG imaging: A multicenter MIBG phantom study in Japan

Okuda K., Nakajima K., Kitamura C., Hori M., Kirihara Y., Matsuo S., Taki J., Hashimoto M., Kinuya S.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 43 S88 - S88 2016.10

Need for standardization of ROI definition in planar cardiac I-123-MIBG imaging

Schmitt C., Jungen C., Okuda K., Kobayashi Y., Helberg A., Mester J., Meyer C., Nakajima K.

EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING 43 S568 - S569 2016.10

Cardiac mortality risk chart in chronic heart failure: multivariate I-123 meta-iodobenzylguanidine risk model incorporating correction of collimator differences

Nakajima Kenichi, Nakata Tomoaki, Matsuo Shinro, Jacobson Arnold, Okuda Koichi, Kinuya Seigo