Hiraki, Takao - OU Author List - OKAYAMA UNIVERSITY SCIENTIFIC ACHIEVEMENT REPOSITORY

Cranial and spinal computed tomography (CT) angiography with photon-counting detector CT: comparison with angiographic and operative findings

FullText URL	fulltext.pdf
Author	Higaki, Fumiyo\| Hiramatsu, Masafumi\| Yasuhara, Takao\| Sasada, Susumu\| Otani, Yoshihiro\| Haruma, Jun\| Inoue, Tomohiro\| Morimitsu, Yusuke\| Akagi, Noriaki\| Matsui, Yusuke\| Iguchi, Toshihiro\| Hiraki, Takao\|
Keywords	Photon-counting detector CT Energy-integrating detector CT CT angiography Neuroimaging Spine
Published Date	2024-09-16
Publication Title	Japanese Journal of Radiology
Volume	volume43
Issue	issue2
Publisher	Springer Science and Business Media LLC
Start Page	143
End Page	151
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2024
File Version	publisher
PubMed ID	39283532
DOI	10.1007/s11604-024-01661-w
Web of Science KeyUT	001313551500001
Related Url	isVersionOf https://doi.org/10.1007/s11604-024-01661-w

Potential of quantitative X‐ray imaging from photon‐counting CT: A novel analysis based on effective atomic number and physical density

FullText URL	fulltext.pdf
Author	Asahara, Takashi\| Nishigami, Rina\| Kimoto, Natsumi\| Mitani, Mana\| Morimitsu, Yusuke\| Akagi, Noriaki\| Higaki, Fumiyo\| Iguchi, Toshihiro\| Hiraki, Takao\| Hayashi, Hiroaki\|
Keywords	computed tomography density image photon-counting virtual monoenergetic image X-ray diagnosis
Published Date	2026-07
Publication Title	Journal of Applied Clinical Medical Physics
Volume	volume27
Issue	issue7
Publisher	Wiley
Start Page	e70673
ISSN	1526-9914
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2026 The Author(s).
File Version	publisher
PubMed ID	42415330
DOI	10.1002/acm2.70673
Web of Science KeyUT	001813367200001
Related Url	isVersionOf https://doi.org/10.1002/acm2.70673

A novel robot for CT-guided bone needle insertion with a rotational drilling and force-feedback speed control mechanism: preliminary evaluation in swine

FullText URL	fulltext.pdf
Author	Matsui, Yusuke\| Hiraki, Takao\| Kimura, Yuta\| Sasaki, Takanori\| Matsuura, Ryutaro\| Tomita, Koji\| Umakoshi, Noriyuki\| Okamoto, Soichiro\| Munetomo, Kazuaki\| Higaki, Fumiyo\| Sakurai, Jun\| Iguchi, Toshihiro\| Nakazawa, Atsushi\| Matsumiya, Kiyoshi\| Matsuno, Takayuki\| Kamegawa, Tetsushi\|
Keywords	Robot Needle Bone CT-guided Intervention
Published Date	2026-06-13
Publication Title	Japanese Journal of Radiology
Publisher	Springer Science and Business Media LLC
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2026
File Version	publisher
PubMed ID	42287345
DOI	10.1007/s11604-026-02030-5
Related Url	isVersionOf https://doi.org/10.1007/s11604-026-02030-5

Tailored Management of Anomalous Systemic Arterial Supply to the Basal Segment of the Lung: A Case Report and Literature Review

FullText URL	fulltext.pdf
Author	Mori, Shunsuke\| Suzawa, Ken\| Tomita, Koji\| Yamamoto, Haruchika\| Nakajima, Kumi\| Tanaka, Shin\| Torigoe, Hidejiro\| Shien, Kazuhiko\| Miyoshi, Kentaroh\| Okazaki, Mikio\| Sugimoto, Seiichiro\| Hiraki, Takao\| Toyooka, Shinichi\|
Keywords	anomalous systemic arterial supply basal lung segment segmentectomy endovascular embolization pulmonary infarction
Published Date	2026
Publication Title	Surgical Case Reports
Volume	volume12
Issue	issue1
Publisher	Japan Surgical Society
Start Page	cr.26-0288
ISSN	2198-7793
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2026 The Author(s).
File Version	publisher
PubMed ID	42199479
DOI	10.70352/scrj.cr.26-0288
Related Url	isVersionOf https://doi.org/10.70352/scrj.cr.26-0288

Appropriate dose reduction using photon-counting detector CT for temporal bone imaging: phantom and clinical studies with helical acquisition

FullText URL	fulltext.pdf
Author	Takahashi, Yuka\| Higaki, Fumiyo\| Nakamura, Yuko\| Higaki, Toru\| Sugaya, Akiko\| Mitsuhashi, Toshiharu\| Kitayama, Takahiro\| Morimitsu, Yusuke\| Inoue, Tomohiro\| Akagi, Noriaki\| Matsui, Yusuke\| Iguchi, Toshihiro\| Awai, Kazuo\| Hiraki, Takao\|
Keywords	PCD-CT EID-CT Dose reduction Temporal bone CT Incudomalleolar joint Stapes
Published Date	2026-05-20
Publication Title	Japanese Journal of Radiology
Publisher	Springer Science and Business Media LLC
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2026
File Version	publisher
PubMed ID	42159907
DOI	10.1007/s11604-026-02002-9
Related Url	isVersionOf https://doi.org/10.1007/s11604-026-02002-9

Is Saline Sealing of Needle Tract Effective to Prevent Pneumothorax after Computed Tomography-guided Lung Biopsy?

FullText URL	fulltext.pdf
Author	Okamoto, Soichiro\| Matsui, Yusuke\| Tomita, Koji\| Munetomo, Kazuaki\| Umakoshi, Noriyuki\| Mitsuhashi, Toshiharu\| Iguchi, Toshihiro\| Hiraki, Takao\|
Keywords	pneumothorax lung biopsy image-guided biopsy needle tract sealing
Published Date	2025-12-29
Publication Title	Interventional Radiology
Volume	volume10
Publisher	The Japanese Society of Interventional Radiology
Start Page	e2025-0068
ISSN	2432-0935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 Japanese Society of Interventional Radiology
File Version	publisher
DOI	10.22575/interventionalradiology.2025-0068
Web of Science KeyUT	001652148600005
Related Url	isVersionOf https://doi.org/10.22575/interventionalradiology.2025-0068

MRI Images of a Case of Adenocarcinoma, Human Papillomavirus-Independent, Mesonephric Type, of the Uterine Cervix

JaLCDOI	10.18926/AMO/69850
FullText URL	79_6_463.pdf
Author	Asano, Yudai\| Nishihara, Chika\| Kitayama, Takahiro\| Okawa, Nanako\| Makimoto, Satoko\| Higaki, Fumiyo\| Kojima, Katsuhide\| Sugihara, Hanako\| Ida, Naoyuki\| Yanai, Hiroyuki\| Hiraki, Takao\|
Abstract	We present a case of a woman in her 70s who was diagnosed with mesonephric adenocarcinoma of the uterine cervix, following biopsy and surgery. Preoperative MRI revealed a 7-cm, well-defined circumferential cervical mass with left lateral wall predominance, bulging into the uterine cavity and vagina. The lesion showed intermediate signal intensity on T2-weighted images, diffusion restriction, and early contrast enhancement weaker than that of the myometrium, followed by washout on contrast-enhanced imaging. The circumferential growth pattern with the lateral wall predominance and its imaging characteristics may suggest this rare entity be routinely included in the differential diagnosis of cervical cancers.
Keywords	mesonephric adenocarcinoma cervical cancer MRI imaging characteristics HPV-independent adenocarcinoma
Amo Type	Case Report
Publication Title	Acta Medica Okayama
Published Date	2025-12
Volume	volume79
Issue	issue6
Publisher	Okayama University Medical School
Start Page	463
End Page	468
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2025 by Okayama University Medical School
File Version	publisher
Refereed	True
PubMed ID	41443809
Web of Science KeyUT	001674277500009

Optimal Virtual-target Definition for Detecting Feeding Arteries of Renal Cell Carcinoma Using Automated Feeder-detection Software

FullText URL	fulltext.pdf
Author	Okamoto, Soichiro\| Matsui, Yusuke\| Kawabata, Takahiro\| Tomita, Koji\| Munetomo, Kazuaki\| Umakoshi, Noriyuki\| Higaki, Fumiyo\| Iguchi, Toshihiro\| Hiraki, Takao\|
Keywords	computed tomography angiography kidney software therapeutic embolization
Published Date	2025-10-31
Publication Title	Interventional Radiology
Volume	volume10
Publisher	The Japanese Society of Interventional Radiology
Start Page	e2025-0034
ISSN	2432-0935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Japanese Society of Interventional Radiology
File Version	publisher
PubMed ID	41250690
DOI	10.22575/interventionalradiology.2025-0034
Related Url	isVersionOf https://doi.org/10.22575/interventionalradiology.2025-0034

Computed tomography findings of idiopathic multicentric Castleman disease subtypes

FullText URL	fulltext.pdf
Author	Iguchi, Toshihiro\| Nishikori, Asami\| Sato, Yasuharu\| Nishimura, Midori Filiz\| Iwaki, Noriko\| Kojima, Katsuhide\| Asahara, Takashi\| Otsuka, Fumio\| Maeda, Yoshinobu\| Hiraki, Takao\|
Keywords	idiopathic multicentric Castleman disease TAFRO syndrome computed tomography
Published Date	2024-12-25
Publication Title	Journal of Clinical and Experimental Hematopathology
Volume	volume64
Issue	issue4
Publisher	Japanese Society for Lymphoreticular Tissue Research
Start Page	292
End Page	296
ISSN	1346-4280
NCID	AA11556796
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 by The Japanese Society for Lymphoreticular Tissue Research
File Version	publisher
PubMed ID	39721711
DOI	10.3960/jslrt.24053
CRID	1390584099501917312
Web of Science KeyUT	001417179400004
Related Url	isVersionOf https://doi.org/001417179400004

Overview of task shifting guidelines in Japan: from radiologists to radiological technologists

FullText URL	fulltext.pdf
Author	Kido, Aki\| Ohno, Kazuko\| Yamada, Kei\| Yamakado, Koichiro\| Hiraki, Takao\| Mizowaki, Takashi\| Aida, Noriko\| Oyama-Manabe, Noriko\| Kodama, Naoki\| Ueda, Katsuhiko\| Aoki, Shigeki\| Tomiyama, Noriyuki\|
Keywords	Task shifting and sharing Radiological technologists Guideline IGRT STAT
Note	The version of record of this article, first published in Japanese Journal of Radiology, is available online at Publisher’s website: http://dx.doi.org/10.1007/s11604-025-01774-w\|
Published Date	2025-05-05
Publication Title	Japanese Journal of Radiology
Volume	volume43
Issue	issue8
Publisher	Springer Science and Business Media LLC
Start Page	1261
End Page	1268
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2025
File Version	publisher
PubMed ID	40323525
DOI	10.1007/s11604-025-01774-w
Web of Science KeyUT	001481306100001
Related Url	isVersionOf https://doi.org/10.1007/s11604-025-01774-w

Successful Treatment for Life Threatening Recurrent Non-traumatic Rectus Sheath Hematoma in a Case with Microscopic Polyangiitis with Rapidly Progressive Glomerulonephritis

FullText URL	fulltext.pdf
Author	Nakanoh, Hiroyuki\| Takeuchi, Hidemi\| Morimoto, Shiho\| Terajima, Yuya\| Okamoto, Shugo\| Onishi, Yasuhiro\| Tanaka, Keiko\| Katsuyama, Takayuki\| Tsuji, Kenji\| Matsumoto, Yoshinori\| Tanabe, Katsuyuki\| Morinaga, Hiroshi\| Uka, Mayu\| Tomita, Koji\| Uchida, Haruhito A.\| Hiraki, Takao\| Wada, Jun\|
Keywords	rectus sheath hematoma microscopic polyangiitis hemodialysis
Published Date	2024-12-01
Publication Title	Internal Medicine
Volume	volume63
Issue	issue23
Publisher	Japanese Society of Internal Medicine
Start Page	3243
End Page	3248
ISSN	0918-2918
NCID	AA10827774
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2024 by The Japanese Society of Internal Medicine
File Version	publisher
PubMed ID	38658341
DOI	10.2169/internalmedicine.3239-23
Web of Science KeyUT	001389172700020
Related Url	isVersionOf https://doi.org/10.2169/internalmedicine.3239-23

Evaluation of a novel central venous access port for direct catheter insertion without a peel-away sheath

FullText URL	fulltext.pdf
Author	Iguchi, Toshihiro\| Kawabata, Takahiro\| Matsui, Yusuke\| Tomita, Koji\| Uka, Mayu\| Umakoshi, Noriyuki\| Okamoto, Soichiro\| Munetomo, Kazuaki\| Hiraki, Takao\|
Keywords	Central venous catheters Vascular access device Treatment outcome Safety
Note	The version of record of this article, first published in Japanese Journal of Radiology, is available online at Publisher’s website: http://dx.doi.org/10.1007/s11604-024-01658-5\|
Published Date	2024-09-17
Publication Title	Japanese Journal of Radiology
Volume	volume43
Issue	issue2
Publisher	Springer Science and Business Media LLC
Start Page	282
End Page	289
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2024
File Version	publisher
PubMed ID	39287917
DOI	10.1007/s11604-024-01658-5
Web of Science KeyUT	001314864600001
Related Url	isVersionOf https://doi.org/10.1007/s11604-024-01658-5

Percutaneous cryoablation versus robot-assisted partial nephrectomy for small renal cell carcinoma: a retrospective cost analysis at Japanese single-institution

FullText URL	fulltext.pdf
Author	Uka, Mayu\| Iguchi, Toshihiro\| Bekku, Kensuke\| Yamanoi, Tomoaki\| Mitsuhashi, Toshiharu\| Gobara, Hideo\| Umakoshi, Noriyuki\| Kawabata, Takahiro\| Tomita, Koji\| Matsui, Yusuke\| Araki, Motoo\| Hiraki, Takao\|
Keywords	Renal cancer Cryoablation Robot-assisted partial nephrectomy Cost Cost effectiveness
Note	The version of record of this article, first published in International Journal of Clinical Oncology, is available online at Publisher’s website: http://dx.doi.org/10.1007/s10147-025-02783-5\|
Published Date	2025-06-06
Publication Title	International Journal of Clinical Oncology
Volume	volume30
Issue	issue8
Publisher	Springer Science and Business Media LLC
Start Page	1621
End Page	1630
ISSN	1341-9625
NCID	AA11086579
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2025
File Version	publisher
PubMed ID	40481379
DOI	10.1007/s10147-025-02783-5
Web of Science KeyUT	001503273300001
Related Url	isVersionOf https://doi.org/10.1007/s10147-025-02783-5

Potential for Radiation Dose Reduction in Temporal Bone CT Imaging Using Photon-Counting Detector CT

JaLCDOI	10.18926/AMO/68645
FullText URL	79_2_075.pdf
Author	Higaki, Fumiyo\| Morimitsu, Yusuke\| Iguchi, Toshihiro\| Hwang, Sung Il\| Kitayama, Takahiro\| Takahashi, Yuka\| Uka, Mayu\| Akagi, Noriaki\| Sugaya, Akiko\| Mitsuhashi, Toshiharu\| Matsui, Yusuke\| Hiraki, Takao\|
Abstract	Temporal bone computed tomography (CT) is frequently performed for pediatric patients with ear diseases. Advances in CT technology have improved diagnostic imaging quality, but reduction of radiation exposure remains a goal. We evaluated the potential for radiation dose reduction in temporal bone CT examinations using porcine ear ossicles and a photon-counting detector CT system. Three scans of the bilateral temporal bone were performed on each of three pig cadaver heads. In each of seven successive imaging sessions, the radiation dose was reduced by an additional one-seventh of the recommended dose (RD). Two board-certified radiologists independently scored the resulting images on a scale of 1 to 5 points, where 5 represented the image quality at the RD. Images scoring ≥4.5 points were considered acceptable. Noise was assessed in a 2-cm-diameter region near the ear ossicles, and standard deviation was measured for each of the seven decrements from the RD. As the radiation dose decreased, the noise progressively increased, and visual assessment scores progressively decreased. Acceptable image scores were obtained at six-sevenths (4.9), five-sevenths (4.8), four-sevenths (4.7), and three-sevenths (4.6) of the RD. Thus, acceptable porcine temporal bone CT images were obtained with a radiation dose reduction of approximately 50%.
Keywords	computed tomography photon-counting detector computed tomography ear ossicle energy-integrating detector computed tomography
Amo Type	Original Article
Publication Title	Acta Medica Okayama
Published Date	2025-04
Volume	volume79
Issue	issue2
Publisher	Okayama University Medical School
Start Page	75
End Page	80
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2025 by Okayama University Medical School
File Version	publisher
Refereed	True
PubMed ID	40302278
Web of Science KeyUT	001485544200002

Investigating the Effects of Reconstruction Conditions on Image Quality and Radiomic Analysis in Photon-counting Computed Tomography

FullText URL	fulltext.pdf
Author	Ohata, Miyu\| Fukui, Ryohei\| Morimitsu, Yusuke\| Kobayashi, Daichi\| Yamauchi, Takatsugu\| Akagi, Noriaki\| Honda, Mitsugi\| Hayashi, Aiko\| Hasegawa, Koshi\| Kida, Katsuhiro\| Goto, Sachiko\| Hiraki, Takao\|
Keywords	Image quality photon-counting computed tomography quantum iterative reconstruction radiomics renal cell carcinoma
Published Date	2025-01
Publication Title	Journal of Medical Physics
Volume	volume50
Issue	issue1
Publisher	Medknow Publications
Start Page	100
End Page	107
ISSN	0971-6203
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© 2025 Journal of Medical Physics
File Version	publisher
DOI	10.4103/jmp.jmp_114_24
Web of Science KeyUT	001452585400015
Related Url	isVersionOf https://doi.org/10.4103/jmp.jmp_114_24

Prediction of Prostate Cancer Grades Using Radiomic Features

JaLCDOI	10.18926/AMO/68355
FullText URL	79_1_021.pdf
Author	Yamamoto, Yasuhiro\| Haraguchi, Takafumi\| Matsuda, Kaori\| Okazaki, Yoshio\| Kimoto, Shin\| Tanji, Nozomu\| Matsumoto, Atsushi\| Kobayashi, Yasuyuki\| Mimura, Hidefumi\| Hiraki, Takao\|
Abstract	We developed a machine learning model for predicting prostate cancer (PCa) grades using radiomic features of magnetic resonance imaging. 112 patients diagnosed with PCa based on prostate biopsy between January 2014 and December 2021 were evaluated. Logistic regression was used to construct two prediction models, one using radiomic features and prostate-specific antigen (PSA) values (Radiomics model) and the other Prostate Imaging-Reporting and Data System (PI-RADS) scores and PSA values (PI-RADS model), to differentiate high-grade (Gleason score [GS] ≥ 8) from intermediate or low-grade (GS < 8) PCa. Five imaging features were selected for the Radiomics model using the Gini coefficient. Model performance was evaluated using AUC, sensitivity, and specificity. The models were compared by leave-one-out cross-validation with Ridge regularization. Furthermore, the Radiomics model was evaluated using the holdout method and represented by a nomogram. The AUC of the Radiomics and PI-RADS models differed significantly (0.799, 95% CI: 0.712-0.869; and 0.710, 95% CI: 0.617-0.792, respectively). Using holdout method, the Radiomics model yielded AUC of 0.778 (95% CI: 0.552-0.925), sensitivity of 0.769, and specificity of 0.778. It outperformed the PI-RADS model and could be useful in predicting PCa grades, potentially aiding in determining appropriate treatment approaches in PCa patients.
Keywords	prostate cancer machine learning prostate Imaging-Reporting and Data System radiomics Gleason score
Amo Type	Original Article
Publication Title	Acta Medica Okayama
Published Date	2025-02
Volume	volume79
Issue	issue1
Publisher	Okayama University Medical School
Start Page	21
End Page	30
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2025 by Okayama University Medical School
File Version	publisher
Refereed	True
PubMed ID	40012156
Web of Science KeyUT	001440463800003

Outcomes of solitary postoperative recurrence of esophageal squamous cell carcinoma diagnosed with FDG-PET/CT and treated with definitive radiation therapy

FullText URL	fulltext.pdf
Author	Ihara, Hiroki\| Yoshio, Kotaro\| Tanabe, Shunsuke\| Sugiyama, Soichi\| Hashimoto, Masashi\| Maeda, Naoaki\| Akagi, Shinsuke\| Takao, Soshi\| Noma, Kazuhiro\| Hiraki, Takao\|
Keywords	Radiation therapy Esophageal squamous cell carcinoma Recurrence 18F-fluorodeoxyglucose positron emission tomography Survival
Note	The version of record of this article, first published in Esophagus, is available online at Publisher’s website: http://dx.doi.org/10.1007/s10388-023-01000-4\|
Published Date	2023-04-07
Publication Title	Esophagus
Volume	volume20
Issue	issue3
Publisher	Springer Science and Business Media LLC
Start Page	548
End Page	556
ISSN	1612-9059
NCID	AA11885266
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2023
File Version	publisher
PubMed ID	37027045
DOI	10.1007/s10388-023-01000-4
Web of Science KeyUT	000964113700001
Related Url	isVersionOf https://doi.org/10.1007/s10388-023-01000-4

Time course of complications after small renal mass biopsy: evaluation of initial follow-up images

FullText URL	fulltext.pdf
Author	Kajita, Soichiro\| Iguchi, Toshihiro\| Matsui, Yusuke\| Tomita, Koji\| Uka, Mayu\| Umakoshi, Noriyuki\| Kawabata, Takahiro\| Munetomo, Kazuaki\| Hiraki, Takao\|
Keywords	Biopsy Imaging Complication Renal neoplasms
Note	The version of record of this article, first published in Japanese Journal of Radiology, is available online at Publisher’s website: http://dx.doi.org/10.1007/s11604-023-01509-9\|
Published Date	2023-11-22
Publication Title	Japanese Journal of Radiology
Volume	volume42
Issue	issue4
Publisher	Springer Science and Business Media LLC
Start Page	398
End Page	405
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2023
File Version	publisher
PubMed ID	37991654
DOI	10.1007/s11604-023-01509-9
Web of Science KeyUT	001106454600001
Related Url	isVersionOf https://doi.org/10.1007/s11604-023-01509-9

Prospective evaluation of core number of biopsy for renal tumor: are multiple cores preferable?

FullText URL	fulltext.pdf
Author	Iguchi, Toshihiro\| Matsui, Yusuke\| Toji, Tomohiro\| Sakurai, Jun\| Tomita, Koji\| Uka, Mayu\| Umakoshi, Noriyuki\| Kawabata, Takahiro\| Munetomo, Kazuaki\| Mitsuhashi, Toshiharu\| Hiraki, Takao\|
Keywords	Biopsy Kidney Tumor Computed tomography Ultrasound
Note	The version of record of this article, first published in Japanese Journal of Radiology, is available online at Publisher’s website: http://dx.doi.org/10.1007/s11604-023-01496-x\|
Published Date	2023-10-14
Publication Title	Japanese Journal of Radiology
Volume	volume42
Issue	issue3
Publisher	Springer Science and Business Media LLC
Start Page	319
End Page	325
ISSN	1867-1071
NCID	AA12375935
Content Type	Journal Article
language	English
OAI-PMH Set	岡山大学
Copyright Holders	© The Author(s) 2023
File Version	publisher
PubMed ID	37833443
DOI	10.1007/s11604-023-01496-x
Web of Science KeyUT	001086535200001
Related Url	isVersionOf https://doi.org/10.1007/s11604-023-01496-x

Photon-Counting Detector CT: Potential for 75% Reduction in Contrast Medium Amount: A Phantom Study

JaLCDOI	10.18926/AMO/66916
FullText URL	78_2_135.pdf
Author	Higaki, Fumiyo\| Morimitsu, Yusuke\| Iguchi, Toshihiro\| Saito, Hayato\| Takaki, Haruhiko\| Nakagoshi, Ayako\| Wada, Maki\| Uka, Mayu\| Akagi, Noriaki\| Mitsuhashi, Toshiharu\| Matsui, Yusuke\| Hiraki, Takao\|
Abstract	This study aimed to evaluate the potential reduction in contrast medium utilization using photon-counting detector computed tomography (PCD-CT). One PCD-CT scan (CT1) and three conventional (non-PCD-CT) CT scans (CT2-CT4) were performed using a multi-energy CT phantom that contained eight rods with different iodine concentrations (0.2, 0.5, 1, 2, 5, 10, 15, and 20 mg/ml). The CT values of the seven groups (CT1 for 40, 50, 60, and 70 keV; and CT2-4) were measured. Noise and contrast-to-noise ratio (CNR) were assessed for the eight rods at various iodine concentrations. CT2 and CT1 (40 keV) respectively required 20 mg/ml and 5 mg/ml of iodine, indicating that a comparable contrast effect could be obtained with approximately one-fourth of the contrast medium amount. The standard deviation values increased at lower energy levels irrespective of the iodine concentration. The CNR exhibited a decreasing trend with lower iodine concentrations, while it remained relatively stable across all iodine levels (40-70 keV). This study demonstrated that virtual monochromatic 40 keV images offer a similar contrast effect with a reduced contrast medium amount when compared to conventional CT systems at 120 kV.
Keywords	photon-counting detector CT energy integrating detector CT computed tomography contrast medium amount reduction
Amo Type	Original Article
Publication Title	Acta Medica Okayama
Published Date	2024-04
Volume	volume78
Issue	issue2
Publisher	Okayama University Medical School
Start Page	135
End Page	142
ISSN	0386-300X
NCID	AA00508441
Content Type	Journal Article
language	English
Copyright Holders	Copyright Ⓒ 2024 by Okayama University Medical School
File Version	publisher
Refereed	True
PubMed ID	38688831
Web of Science KeyUT	001229151800005