Works by Funama, Yoshinori

Results: 43

Clinical potential of retrospective on-demand spectral analysis using dual-layer spectral detector-computed tomography in ischemia complicating small-bowel obstruction.

Published in:

2017

By:

Oda, Seitaro;
Nakaura, Takeshi;
Utsunomiya, Daisuke;
Funama, Yoshinori;
Taguchi, Narumi;
Imuta, Masanori;
Nagayama, Yasunori;
Yamashita, Yasuyuki

Publication type:

journal article

Impact of deep learning reconstruction on radiation dose reduction and cancer risk in CT examinations: a real-world clinical analysis.

Published in:

European Radiology, 2025, v. 35, n. 6, p. 3499, doi. 10.1007/s00330-024-11212-6

By:

Kobayashi, Naoki;
Nakaura, Takeshi;
Yoshida, Naofumi;
Nagayama, Yasunori;
Kidoh, Masafumi;
Uetani, Hiroyuki;
Sakabe, Daisuke;
Kawamata, Yuki;
Funama, Yoshinori;
Tsutsumi, Takashi;
Hirai, Toshinori

Publication type:

Article

Low tube voltage and deep-learning reconstruction for reducing radiation and contrast medium doses in thin-slice abdominal CT: a prospective clinical trial.

Published in:

European Radiology, 2024, v. 34, n. 11, p. 7386, doi. 10.1007/s00330-024-10793-6

By:

Yoshida, Kenichiro;
Nagayama, Yasunori;
Funama, Yoshinori;
Ishiuchi, Soichiro;
Motohara, Toshihiko;
Masuda, Toshiro;
Nakaura, Takeshi;
Ishiko, Takatoshi;
Hirai, Toshinori;
Beppu, Toru

Publication type:

Article

Improving image quality with super-resolution deep-learning-based reconstruction in coronary CT angiography.

Published in:

European Radiology, 2023, v. 33, n. 12, p. 8488, doi. 10.1007/s00330-023-09888-3

By:

Nagayama, Yasunori;
Emoto, Takafumi;
Kato, Yuki;
Kidoh, Masafumi;
Oda, Seitaro;
Sakabe, Daisuke;
Funama, Yoshinori;
Nakaura, Takeshi;
Hayashi, Hidetaka;
Takada, Sentaro;
Uchimura, Ryutaro;
Hatemura, Masahiro;
Tsujita, Kenichi;
Hirai, Toshinori

Publication type:

Article

Myocardial extracellular volume quantification in cardiac CT: comparison of the effects of two different iterative reconstruction algorithms with MRI as a reference standard.

Published in:

2020

By:

Emoto, Takafumi;
Kidoh, Masafumi;
Oda, Seitaro;
Nakaura, Takeshi;
Nagayama, Yasunori;
Sasao, Akira;
Funama, Yoshinori;
Araki, Satoshi;
Takashio, Seiji;
Sakamoto, Kenji;
Yamamoto, Eiichiro;
Kaikita, Koichi;
Tsujita, Kenichi;
Yamashita, Yasuyuki

Publication type:

journal article

Dual-layer DECT for multiphasic hepatic CT with 50 percent iodine load: a matched-pair comparison with a 120 kVp protocol.

Published in:

2018

By:

Nagayama, Yasunori;
Nakaura, Takeshi;
Oda, Seitaro;
Utsunomiya, Daisuke;
Funama, Yoshinori;
Iyama, Yuji;
Taguchi, Narumi;
Namimoto, Tomohiro;
Yuki, Hideaki;
Kidoh, Masafumi;
Hirata, Kenichiro;
Nakagawa, Masataka;
Yamashita, Yasuyuki

Publication type:

journal article

Breast dose reduction for chest CT by modifying the scanning parameters based on the pre-scan size-specific dose estimate (SSDE).

Published in:

2017

By:

Kidoh, Masafumi;
Utsunomiya, Daisuke;
Oda, Seitaro;
Nakaura, Takeshi;
Funama, Yoshinori;
Yuki, Hideaki;
Hirata, Kenichiro;
Namimoto, Tomohiro;
Sakabe, Daisuke;
Hatemura, Masahiro;
Yamashita, Yasuyuki

Publication type:

journal article

Using 80 kVp on a 320-row scanner for hepatic multiphasic CT reduces the contrast dose by 50 % in patients at risk for contrast-induced nephropathy.

Published in:

2017

By:

Taguchi, Narumi;
Oda, Seitaro;
Utsunomiya, Daisuke;
Funama, Yoshinori;
Nakaura, Takeshi;
Imuta, Masanori;
Yamamura, Sadahiro;
Yuki, Hideaki;
Kidoh, Masafumi;
Hirata, Kenichiro;
Namimoto, Tomohiro;
Hatemura, Masahiro;
Kai, Noriyuki;
Yamashita, Yasuyuki

Publication type:

journal article

Reduction of metallic coil artefacts in computed tomography body imaging: effects of a new single-energy metal artefact reduction algorithm.

Published in:

2016

By:

Kidoh, Masafumi;
Utsunomiya, Daisuke;
Ikeda, Osamu;
Tamura, Yoshitaka;
Oda, Seitaro;
Funama, Yoshinori;
Yuki, Hideaki;
Nakaura, Takeshi;
Kawano, Takayuki;
Hirai, Toshinori;
Yamashita, Yasuyuki

Publication type:

journal article

Comparison of standard- and low-tube voltage MDCT angiography in patients with peripheral arterial disease.

Published in:

2010

By:

Utsunomiya D;
Oda S;
Funama Y;
Awai K;
Nakaura T;
Yanaga Y;
Hirai T;
Yamashita Y;
Utsunomiya, Daisuke;
Oda, Seitaro;
Funama, Yoshinori;
Awai, Kazuo;
Nakaura, Takeshi;
Yanaga, Yumi;
Hirai, Toshinori;
Yamashita, Yasuyuki

Publication type:

journal article

Preliminary assessment of automated radiology report generation with generative pre-trained transformers: comparing results to radiologist-generated reports.

Published in:

Japanese Journal of Radiology, 2024, v. 42, n. 2, p. 190, doi. 10.1007/s11604-023-01487-y

By:

Nakaura, Takeshi;
Yoshida, Naofumi;
Kobayashi, Naoki;
Shiraishi, Kaori;
Nagayama, Yasunori;
Uetani, Hiroyuki;
Kidoh, Masafumi;
Hokamura, Masamichi;
Funama, Yoshinori;
Hirai, Toshinori

Publication type:

Article

Comparison of visibility of in-stent restenosis between conventional- and ultra-high spatial resolution computed tomography: coronary arterial phantom study.

Published in:

Japanese Journal of Radiology, 2022, v. 40, n. 3, p. 279, doi. 10.1007/s11604-021-01200-x

By:

Nishii, Toshiaki;
Funama, Yoshinori;
Kato, Shingo;
Iwasawa, Tae;
Yasuda, Naofumi;
Ota, Yoichiro;
Kawagoe, Hironori;
Oda, Seitaro;
Tsutsumi, Takashi;
Utsunomiya, Daisuke

Publication type:

Article

Added value of a single-energy projection-based metal-artifact reduction algorithm for the computed tomography evaluation of oral cavity cancers.

Published in:

2015

By:

Hirata, Kenichiro;
Utsunomiya, Daisuke;
Oda, Seitaro;
Kidoh, Masafumi;
Funama, Yoshinori;
Yuki, Hideaki;
Yoshida, Morikatsu;
Yamashita, Yasuyuki

Publication type:

journal article

Radiation exposure of operator performing interventional procedures using a flat panel angiography system: evaluation with photoluminescence glass dosimeters.

Published in:

2010

By:

Funama Y;
Nagasue N;
Awai K;
Sakamoto I;
Kakei K;
Shimamura M;
Yamashita Y;
Uetani M;
Funama, Yoshinori;
Nagasue, Nozomu;
Awai, Kazuo;
Sakamoto, Ichiro;
Kakei, Kiyotaka;
Shimamura, Masamichi;
Yamashita, Yasuyuki;
Uetani, Masataka

Publication type:

journal article

Effects of dual-energy subtraction chest radiography on detection of small pulmonary nodules with varying attenuation: receiver operating characteristic analysis using a phantom study.

Published in:

2010

By:

Oda S;
Awai K;
Funama Y;
Utsunomiya D;
Yanaga Y;
Kawanaka K;
Yamashita Y;
Oda, Seitaro;
Awai, Kazuo;
Funama, Yoshinori;
Utsunomiya, Daisuke;
Yanaga, Yumi;
Kawanaka, Koichi;
Yamashita, Yasuyuki

Publication type:

journal article

Image quality improvement with deep learning‐based reconstruction on abdominal ultrahigh‐resolution CT: A phantom study.

Published in:

Journal of Applied Clinical Medical Physics, 2021, v. 22, n. 7, p. 286, doi. 10.1002/acm2.13318

By:

Shirasaka, Takashi;
Kojima, Tsukasa;
Funama, Yoshinori;
Sakai, Yuki;
Kondo, Masatoshi;
Mikayama, Ryoji;
Hamasaki, Hiroshi;
Kato, Toyoyuki;
Ushijima, Yasuhiro;
Asayama, Yoshiki;
Nishie, Akihiro

Publication type:

Article

Improving Visualization of In-stent Lumen Using Prototype Photon-counting Detector Computed Tomography with High-resolution Plaque Kernel.

Published in:

Journal of Medical Physics, 2024, v. 49, n. 1, p. 127, doi. 10.4103/jmp.jmp_163_23

By:

Yoshinori Funama;
Seitaro Oda;
Fuyuhiko Teramoto;
Yuko Aoki;
Isao Takahashi;
Shinichi Kojima;
Taiga Goto;
Kana Tanaka;
Masafumi Kidoh;
Yasunori Nagayama;
Takeshi Nakaura;
Toshinori Hirai

Publication type:

Article

The effect of heart rate on coronary plaque measurements in 320-row coronary CT angiography.

Published in:

2018

By:

Kidoh, Masafumi;
Utsunomiya, Daisuke;
Funama, Yoshinori;
Sakabe, Daisuke;
Oda, Seitaro;
Nakaura, Takeshi;
Yuki, Hideaki;
Nagayama, Yasunori;
Hirata, Kenichiro;
Iyama, Yuji;
Namimoto, Tomohiro;
Yamashita, Yasuyuki

Publication type:

journal article

Validity of the size-specific dose estimate in adults undergoing coronary CT angiography: comparison with the volume CT dose index.

Published in:

2015

By:

Kidoh, Masafumi;
Utsunomiya, Daisuke;
Oda, Seitaro;
Funama, Yoshinori;
Yuki, Hideaki;
Nakaura, Takeshi;
Kai, Noriyuki;
Nozaki, Takeshi;
Yamashita, Yasuyuki

Publication type:

journal article

Prediction of endovascular leaks after thoracic endovascular aneurysm repair though machine learning applied to pre-procedural computed tomography angiographs.

Published in:

Physical & Engineering Sciences in Medicine, 2024, v. 47, n. 3, p. 1087, doi. 10.1007/s13246-024-01429-6

By:

Masuda, Takanori;
Baba, Yasutaka;
Nakaura, Takeshi;
Funama, Yoshinori;
Sato, Tomoyasu;
Masuda, Shouko;
Gotanda, Rumi;
Arao, Keiko;
Imaizumi, Hiromasa;
Arao, Shinichi;
Ono, Atsushi;
Hiratsuka, Junichi;
Awai, Kazuo

Publication type:

Article

Usefulness of large beam-shaping filters at different tube voltages of newborn chest CT.

Published in:

Physical & Engineering Sciences in Medicine, 2023, v. 46, n. 1, p. 289, doi. 10.1007/s13246-023-01217-8

By:

Masuda, Takanori;
Funama, Yoshinori;
Nakaura, Takeshi;
Sato, Tomoyasu;
Urayama, Kotaro;
Kiguchi, Masao;
Oku, Takayuki;
Yoshida, Masato;
Arao, Shinichi;
Ono, Atsushi;
Hiratsuka, Junichi;
Awai, Kazuo

Publication type:

Article

Basic verification of myocardial extracellular volume quantification by prototype photon-counting detector computed tomography: A phantom study.

Published in:

Journal of Clinical Imaging Science, 2025, n. 2, p. 1, doi. 10.25259/JCIS_157_2024

By:

Oda, Seitaro;
Funama, Yoshinori;
Kojima, Shinichi;
Yokoi, Kazuma;
Takahashi, Isao;
Aoki, Yuko;
Goto, Taiga;
Tanaka, Kana;
Teramoto, Fuyuhiko;
Kidoh, Masafumi;
Nagayama, Yasunori;
Nakaura, Takeshi;
Hirai, Toshinori

Publication type:

Article

Dose Reduction and Low-Contrast Detectability Using Iterative CBCT Reconstruction Algorithm for Radiotherapy.

Published in:

Technology in Cancer Research & Treatment, 2022, v. 21, p. 1, doi. 10.1177/15330338211067312

By:

Washio, Hayate;
Ohira, Shingo;
Funama, Yoshinori;
Ueda, Yoshihiro;
Morimoto, Masahiro;
Kanayama, Naoyuki;
Isono, Masaru;
Inui, Shoki;
Nitta, Yuya;
Miyazaki, Masayoshi;
Teshima, Teruki

Publication type:

Article

Development and Validation of Generalized Linear Regression Models to Predict Vessel Enhancement on Coronary CT Angiography.

Published in:

Korean Journal of Radiology, 2018, v. 19, n. 6, p. 1021, doi. 10.3348/kjr.2018.19.6.1021

By:

Takanori Masuda;
Takeshi Nakaura;
Yoshinori Funama;
Tomoyasu Sato;
Toru Higaki;
Masao Kiguchi;
Yoriaki Matsumoto;
Yukari Yamashita;
Naoyuki Imada;
Kazuo Awai

Publication type:

Article

Effect of Patient Characteristics on Vessel Enhancement at Lower Extremity CT Angiography.

Published in:

Korean Journal of Radiology, 2018, v. 19, n. 2, p. 265, doi. 10.3348/kjr.2018.19.2.265

By:

Takanori Masuda;
Takeshi Nakaura;
Yoshinori Funama;
Tomoyasu Sato;
Toru Higaki;
Masao Kiguchi;
Yukari Yamashita;
Naoyuki Imada;
Kazuo Awai

Publication type:

Article

A computer-simulated liver phantom (virtual liver phantom) for multidetector computed tomography evaluation.

Published in:

2006

By:

Funama, Yoshinori;
Awai, Kazuo;
Miyazaki, Osamu;
Nakayama, Yoshiharu;
Liu, Da;
Goto, Taiga;
Yamashita, Yasuyuki;
Hori, Shinichi

Publication type:

journal article

Effects of tube voltage and iodine contrast medium on radiation dose of whole-body CT.

Published in:

Acta Radiologica, 2022, v. 63, n. 4, p. 458, doi. 10.1177/02841851211001539

By:

Yoshida, Morikatsu;
Nakaura, Takeshi;
Oda, Seitaro;
Kidoh, Masafumi;
Nagayama, Yasunori;
Uetani, Hiroyuki;
Azuma, M;
Sakabe, Daisuke;
Hirai, Toshinori;
Funama, Yoshinori

Publication type:

Article

Effect of image quality on myocardial extracellular volume quantification using cardiac computed tomography: a phantom study.

Published in:

Acta Radiologica, 2022, v. 63, n. 2, p. 159, doi. 10.1177/0284185120986938

By:

Funama, Yoshinori;
Oda, Seitaro;
Kidoh, Masafumi;
Sakabe, Daisuke;
Nakaura, Takeshi

Publication type:

Article

Clinical impact of model-based type iterative reconstruction with fast reconstruction time on image quality of low-dose screening chest CT.

Published in:

2016

By:

Yuki, Hideaki;
Oda, Seitaro;
Utsunomiya, Daisuke;
Funama, Yoshinori;
Kidoh, Masafumi;
Namimoto, Tomohiro;
Katahira, Kazuhiro;
Honda, Keiichi;
Tokuyasu, Shinichi;
Yamashita, Yasuyuki

Publication type:

journal article

Patient-specific tube-voltage selection at coronary CT angiography based on the combination of X-ray attenuation on scout views and body mass index: how can appropriate radiation dose be achieved?

Published in:

2015

By:

Noto, Daichi;
Funama, Yoshinori;
Utsunomiya, Daisuke;
Oda, Seitaro;
Yuki, Hideaki;
Yamashita, Yasuyuki

Publication type:

journal article

Cardiac computed tomography angiography with and without bolus tracking methods in infants with congenital heart disease.

Published in:

Radiation Protection Dosimetry, 2024, v. 200, n. 3, p. 251, doi. 10.1093/rpd/ncad295

By:

Yoshiura, Takayuki;
Masuda, Takanori;
Tahara, Masahiro;
Kobayashi, Yukie;
Kikuhara, Yukari;
Ishibashi, Toru;
Nonaka, Haruki;
Oku, Takayuki;
Sato, Tomoyasu;
Funama, Yoshinori

Publication type:

Article

Usefulness of electrocardiogram mA modulation during the electrocardiogram-gated CT scan in paediatrics with high heart rate for different helical pitch: a phantom-based assessment study.

Published in:

Radiation Protection Dosimetry, 2023, v. 199, n. 12, p. 1295, doi. 10.1093/rpd/ncad180

By:

Masuda, Takanori;
Funama, Yoshinori;
Nakaura, Takeshi;
Sato, Tomoyasu;
Oku, Takayuki;
Gotanda, Rumi;
Arao, Keiko;
Imaizumi, Hiromasa;
Arao, Shinichi;
Ono, Atsushi;
Hiratsuka, Junichi;
Awai, Kazuo

Publication type:

Article

RADIATION DOSE REDUCTION AT LOW TUBE VOLTAGE WITH CORONARY ARTERY BYPASS GRAFT COMPUTED TOMOGRAPHY ANGIOGRAPHY BASED ON THE CONTRAST NOISE RATIO INDEX.

Published in:

Radiation Protection Dosimetry, 2023, v. 199, n. 6, p. 527, doi. 10.1093/rpd/ncad049

By:

Masuda, Takanori;
Nakaura, Takeshi;
Funama, Yoshinori;
Sato, Tomoyasu;
Masuda, Shouko;
Gotanda, Rumi;
Arao, Keiko;
Imaizumi, Hiromasa;
Arao, Shinichi;
Ono, Atsushi;
Hiratsuka, Junichi;
Awai, Kazuo

Publication type:

Article

COMPARISON OF PEDIATRIC LENS DOSE MEASUREMENTS BETWEEN AXIAL SCAN MODE WITHOUT ACTIVE COLLIMATOR AND HELICAL SCAN MODE WITH ACTIVE COLLIMATOR BY USING A 64 DETECTOR-ROW COMPUTED TOMOGRAPHY SCANNER.

Published in:

Radiation Protection Dosimetry, 2022, v. 198, n. 19, p. 1522, doi. 10.1093/rpd/ncac196

By:

Masuda, Takanori;
Funama, Yoshinori;
Nakaura, Takeshi;
Sato, Tomoyasu;
Urayama, Kotaro;
Kiguchi, Masao;
Oku, Takayuki;
Arao, Shinichi;
Ono, Atsushi;
Hiratsuka, Junichi;
Awai, Kazuo

Publication type:

Article

USE OF VACUUM MATTRESSES CAN REDUCE THE ABSORBED DOSE DURING PEDIATRIC CT.

Published in:

Radiation Protection Dosimetry, 2021, v. 194, n. 4, p. 201, doi. 10.1093/rpd/ncab102

By:

Masuda, Takanori;
Funama, Yoshinori;
Nakaura, Takeshi;
Sato, Tomoyasu;
Tahara, Masahiro;
Takei, Yasutaka;
Yamashita, Yukari;
Oku, Takayuki;
Masuda, Shouko;
Kiguchi, Masao;
Awai, Kazuo

Publication type:

Article

Usefulness of diluted contrast medium for test-scanning of infants scheduled for contrast-enhanced cardiovascular computed tomography angiography.

Published in:

British Journal of Radiology, 2019, v. 92, n. 1094, p. N.PAG, doi. 10.1259/bjr.20180572

By:

Masuda, Takanori;
Matsumoto, Yoriaki;
Funama, Yoshinori;
Nakaura, Takeshi;
Sato, Tomoyasu;
Tahara, Masahiro;
Imada, Naoyuki;
Miyazaki, Osamu;
Awai, Kazuo

Publication type:

Article

Low contrast material dose coronary computed tomographic angiography using a dual-layer spectral detector system in patients at risk for contrast-induced nephropathy.

Published in:

British Journal of Radiology, 2019, v. 92, n. 1094, p. N.PAG, doi. 10.1259/bjr.20180215

By:

Oda, Seitaro;
Nakaura, Takeshi;
Nagayama, Yasunori;
Taguchi, Narumi;
Kidoh, Masafumi;
Utsunomiya, Daisuke;
Yamashita, Yasuyuki;
Takaoka, Hiroko;
Katahira, Kazuhiro;
Honda, Keiichi;
Funama, Yoshinori;
Noda, Katsuo;
Oshima, Shuichi

Publication type:

Article

Dual-region-of-interest bolus-tracking technique for coronary computed tomographic angiography on a 320-row scanner: reduction in the interpatient variability of arterial contrast enhancement.

Published in:

British Journal of Radiology, 2018, v. 91, n. 1081, p. -1, doi. 10.1259/bjr.20170541

By:

Kai, Noriyuki;
Oda, Seitaro;
Utsunomiya, Daisuke;
Nakaura, Takeshi;
Funama, Yoshinori;
Kidoh, Masafumi;
Taguchi, Narumi;
Iyama, Yuji;
Nagayama, Yasunori;
Hirata, Kenichiro;
Yuki, Hideaki;
Sakabe, Daisuke;
Hatemura, Masahiro;
Yamashita, Yasuyuki

Publication type:

Article

Contrast enhancement in abdominal computed tomography: influence of photon energy of different scanners.

Published in:

British Journal of Radiology, 2018, v. 91, n. 1081, p. -1, doi. 10.1259/bjr.20170285

By:

Taguchi, Narumi;
Oda, Seitaro;
Nakaura, Takeshi;
Utsunomiya, Daisuke;
Funama, Yoshinori;
Imuta, Masanori;
Yuki, Hideaki;
Nagayama, Yasunori;
Kidoh, Masafumi;
Hirata, Kenichiro;
Iyama, Yuji;
Namimoto, Tomohiro;
Kai, Noriyuki;
Hatemura, Masahiro;
Yamashita, Yasuyuki

Publication type:

Article

Optimal scan timing for artery–vein separation at whole-brain CT angiography using a 320-row MDCT volume scanner.

Published in:

British Journal of Radiology, 2017, v. 90, n. 1070, p. 1, doi. 10.1259/bjr.20160634

By:

TAKASHI SHIRASAKA;
AKIO HIWATASHI;
KOJI YAMASHITA;
MASATOSHI KONDO;
HIROSHI HAMASAKI;
YAMATO SHIMOMIYA;
YASUHIKO NAKAMURA;
YOSHINORI FUNAMA;
HIROSHI HONDA

Publication type:

Article

Usefulness of the patient-specific contrast enhancement optimizer simulation software during the whole-body computed tomography angiography.

Published in:

Heart & Vessels, 2022, v. 37, n. 8, p. 1446, doi. 10.1007/s00380-022-02024-z

By:

Masuda, Takanori;
Higaki, Toru;
Nakaura, Takeshi;
Funama, Yoshinori;
Matsumoto, Yoriaki;
Sato, Tomoyasu;
Okimoto, Tomokazu;
Gotanda, Rumi;
Arao, Keiko;
Imaizumi, Hiromasa;
Arao, Shinichi;
Hiratsuka, Junichi;
Awai, Kazuo

Publication type:

Article

Spectral imaging with dual-layer spectral detector computed tomography for the detection of perfusion defects in acute coronary syndrome.

Published in:

Heart & Vessels, 2022, v. 37, n. 7, p. 1115, doi. 10.1007/s00380-021-02019-2

By:

Mochizuki, Junji;
Nakaura, Takeshi;
Yoshida, Naofumi;
Nagayama, Yasunori;
Kidoh, Masafumi;
Uetani, Hiroyuki;
Funama, Yoshinori;
Hata, Yoshiki;
Azuma, Minako;
Hirai, Toshinori

Publication type:

Article

Relationship between the radiation doses at nonenhanced CT studies using different tube voltages and automatic tube current modulation during anthropomorphic phantoms of young children.

Published in:

Journal of Applied Clinical Medical Physics, 2017, v. 18, n. 6, p. 232, doi. 10.1002/acm2.12192

By:

Masuda, Takanori;
Funama, Yoshinori;
Kiguchi, Masao;
Osawa, Kazuaki;
Suzuki, Syouichi;
Oku, Takayuki;
Sugisawa, Koichi;
Shouji, Tomokazu;
Awai, Kazuo

Publication type:

Article