Ohya Ayumi
Academic Assembly School of Medicine and Health Sciences Institute of Medicine
Shinshu University Hospital Radiology
Associate Professor
Researcher Information
Research activity information
Paper
- The usefulness of the follicle-preserving sign in differentiating between benign, borderline, and malignant ovarian tumors on magnetic resonance imaging
Daiya Takekoshi · Ayumi Ohya · Takuya Fukuzawa · Mana Maehara · Akira Yamada · Yasunari Fujinaga
Japanese Journal of Radiology, 44, 552-559, 2026, Refereed
Corresponding - Optimal combination of microcoils, flow control, and n-butyl cyanoacrylate-Lipiodol-iopamidol (2:3:1) for feasible embolization of medium-sized arteries in an in vitro vascular model.
Suzuki T, Matsuda J, Tsukahara Y, Ohya A, Yamada A, Kurozumi M, Fujinaga Y.
Japanese Journal of Radiology, 43(2), 301-308, 2025 - Usefulness of decision tree analysis of MRI features for diagnosis of placenta accreta spectrum in cases with placenta previa.
Tanaka Y, Ando H, Miyamoto T, Yokokawa Y, Ono M, Asaka R, Kobara H, Fuseya C, Kikuchi N, Ohya A, Fujinaga Y, Shiozawa T.
Japanese Journal of Radiology, 43(3), 492-501, 2025 - Limited diagnostic performance of imaging evaluation for staging in gastric-type endocervical adenocarcinoma: a multi-center study.
Himoto Y, Kido A, Yamanoi K, Kurata Y, Morita S, Kikkawa N, Fukui H, Ohya A, Iraha Y, Tsuboyama T, Ito K, Fujinaga Y, Minamiguchi S, Mandai M, Nakamoto Y.
Japanese Journal of Radiology, 43(5), 810-819, 2025 - Lobular Endocervical Glandular Hyperplasia and Related Glandular Disorders: Current Status of Diagnosis with MR Imaging.
Ayumi Ohya, Yasunari Fujinaga
Magnetic Resonance in Medical Sciences, 24(3), 332-342, 2025
Lead, Corresponding - Age‑related changes in the radiologic findings of lobular endocervical glandular hyperplasia: a multicenter study
Ohya A, Fukuzawa T, Himoto Y, Kido A, Tsuboyama T, Kikkawa N, Fukui H, Iraha Y, Ito K, Fujinaga Y.
Japanese Journal of Radiology, 43(6), 985-994, 2025, Refereed
Lead, Corresponding - Pseudo-myometrial thinning in placental site trophoblastic tumors: a case series with multiparametric MRI
Takahiro Tsuboyama, Takuya Fukuzawa, Moto Nakaya, Yasuchiyo Toyama, Ayumi Ohya, Katsuhiro Sano, Akiko Takahata, Kansuke Kido, Noriyuki Tomiyama
Abdom Radiol (NY), 50(1), 538-547, 2025, Refereed - Problems of magnetic resonance diagnosis for gastric-type mucin-positive cervical lesions of the uterus and its solutions using artificial intelligence.
Ohya A, Miyamoto T, Ichinohe F, Kobara H, Fujinaga Y, Shiozawa T.
PLoS One, 19(12), e0315862, 30 Dec. 2024, Refereed
Lead - MR diagnosis of SCC arising within ovarian cystic teratomas: analysis of mural nodule characteristics
Takuya Fukuzawa, Ayumi Ohya, Mika Tanaka, Marika Shimizu, Kentaro Kobayashi, Tomohito Matsushita, Tomofumi Watanabe, Hisanori Kobara, Yasunari Fujinaga
Abdom Radiol, 49(4), 1264-1274, 2024, Refereed
Corresponding - Magnetic resonance imaging findings of cystic ovarian tumors: major differential diagnoses in five types frequently encountered in daily clinical practice
Ohya, Ayumi; Fujinaga, Yasunari;
JAPANESE JOURNAL OF RADIOLOGY, 2022
- Decreased Gastric Gland Mucin-specific O-glycans Are Involved in the Progression of Ovarian Primary Mucinous Tumours.
Ohya A, Matoba H, Fujinaga Y, Nakayama J.
Acta Histochem Cytochem, 54(4), 115-122, 2021, Refereed
Lead, Corresponding - Neuroendocrine carcinoma of uterine cervix findings shown by MRI for staging and survival analysis - Japan multicenter study.
Kitajima K, Kihara T, Kawanaka Y, Kido A, Yoshida K, Mizumoto Y, Tomiyama A, Okuda S, Jinzaki M, Kato F, Takahama J, Takahata A, Fukukura Y, Nakamoto A, Tsujikawa T, Munechika J, Ohgiya Y, Kawai N, Goshima S, Ohya A, Fujinaga Y, Fukunaga T, Fujii S, Tanabe M, Ito K, Tsuboyama T, Kanie Y, Umeoka S, Ichikawa S, Motosugi U, Daido S, Kido A, Tamada T, Matsuki M, Yamashiro T, Yamakado K.
Oncotarget, 11(40), 3675-3686, 2020 - Evaluation of hemodynamic imaging findings of hypervascular hepatocellular carcinoma: comparison between dynamic contrast-enhanced magnetic resonance imaging using radial volumetric imaging breath-hold examination with k-space-weighted image contrast reconstruction and dynamic computed tomography during hepatic arteriography
Kurozumi M, Fujinaga Y, Kitou Y, Yamada A, Ohya A, Adachi Y, Tsukahara Y, Nichel MD, Maruyama K, Uehara T, Miyagawa S, Kadoya M
JAPANESE JOURNAL OF RADIOLOGY, 36(4), 295-302, 2018 - Uterine cervical adenocarcinoma associated with lobular endocervical glandular hyperplasia: Radiologic- pathologic correlation
Ohya A, Asaka S, Fujinaga Y, Kadoya M
J Obstet Gynecol Res, 44, 312-322, 2018
Lead, Corresponding - Epithelioid trophoblastic tumor of the uterus: A case report with radiologic-pathologic correlation.
Ohya A, Higuchi K, Shimojo H, Fujinaga Y, Kadoya M, Shiohara S.
J Obstet Gynaecol Res., 43, 1360-1365, 2017
Lead - Gastric gland mucin-specific O-glycan expression decreases with tumor progression from precursor lesions to pancreatic cancer.
Ohya A, Yamanoi K, Shimojo H, Fujii C, Nakayama J.
Cancer Sci., 108, 1897-1902, 2017
Lead - Advantages of radial volumetric breath-hold examination (VIBE) with k-space weighted image contrast reconstruction (KWIC) over Cartesian VIBE in liver imaging of volunteers simulating inadequate or no breath-holding ability
Fujinaga Y, Kitou Y, Ohya A, Adachi Y, Tamaru N, Shiobara A, Ueda H, Nickel M, Maruyama K, Kadoya M
Eur Radiol, 26, 2790-2797, 2016 - Radial volumetric imaging breath-hold examination (VIBE) with k-space weighted image contrast (KWIC) for dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced MRI of the liver: advantages over Cartesian VIBE in the arterial phase
Fujinaga, Y; Ohya, A; Tokoro, H; Yamada, A; Ueda, K; Ueda, H; Kitou, Y; Adachi, Y; Shiobara, A; Tamaru, N; Nickel, MD; Maruyama, K; Kadoya, M
EUROPEAN RADIOLOGY, 24(6), 1290-1299, Jun. 2014
- Polypoid endometriosis of the ovary mimicking ovarian carcinoma dissemination: a case report and literature review.
Yamada Y, Miyamoto T, Horiuchi A, Ohya A, Shiozawa T.
J Obstet Gynaecol Res., 40, 1426-30, 2014 - Assessment of treatment outcomes based on tumor marker trends in patients with recurrent hepatocellular carcinoma undergoing trans-catheter arterial chemo-embolization.
Arai T, Kobayashi A, Ohya A, Takahashi M, Yokoyama T, Shimizu A, Motoyama H, Furusawa N, Notake T, Kitagawa N, Sakai H, Imamura H, Kadoya M, Miyagawa S.
Int J Clin Oncol., 19, 871-879, 2014 - Lymphocyte recruitment via high endothelial venules in lymphoid stroma of Warthin’s tumour.
Ohya A, Kobayashi M,Sakai Y, Kawashima H, Kageyama S, Nakayama J
PATHOLOGY, 45, 150–154, 2013
Lead - Periductal induction of high endothelial venule-like vessels in type 1 autoimmune pancreatitis.
Maruyama M, Kobayashi M, Sakai Y, Hiraoka N, Ohya A, Kageyama S, Tanaka E, Nakayama J, Morohoshi T
Pancreas, 42(1), 53-59, 2013 - Placental Mesenchymal Dysplasia: Chronological Observation of Placental Images during Gestation and Review of the Literature.
Ohira S, Ookubo N, Tanaka K, Takatsu A, Kobara H, Kikuchi N, Ohya A, Kanai M, Shiozawa T
Gynecol Obstet Invest, 75(4), 217-223, 2013 - Effect of hepatobiliary uptake of Gd-EOB-DTPA on the hepatic venous phase of dynamicmagnetic resonance imaging on a 3.0-T apparatus: comparison between Gd-EOB-DTPA and Gd-DTPA.
Fujinaga Y, Ohya A, Matsushita T, Kurozumi M, Ueda K, Kitou Y, Ueda H, Kadoya M
Jpn J Radiol, 29(10), 695-700, 2011
