Search results for: Tetsuya Minami

Items from 1 to 20 out of 34 results

article

Risk factors for local recurrence of hepatocellular carcinoma after transcatheter arterial chemoembolization with drug-eluting beads (DEB-TACE)

Mariko M. Nakano, Akira Yamamoto, Norifumi Nishida, Masao Hamuro, more

Japanese Journal of Radiology > 2019 > 37 > 7 > 543-548

Purpose To identify the risk factors for local recurrence in hepatocellular carcinoma (HCC) patients treated with transcatheter arterial chemoembolization (TACE) with drug-eluting beads (DEB-TACE). Materials and methods In this retrospective study, 35 patients (27 males, 8 females; median age 73 years) with 116 tumors (median size 14 mm) treated with DEB-TACE from May 2014 to September 2018 were...

article

Current status of imaging biomarkers predicting the biological nature of hepatocellular carcinoma

Norihide Yoneda, Osamu Matsui, Satoshi Kobayashi, Azusa Kitao, more

Japanese Journal of Radiology > 2019 > 37 > 3 > 191-208

Hepatocellular carcinoma (HCC) is heterogeneous in terms of its biological nature. Various factors related to its biological nature, including size, multifocality, macroscopic morphology, grade of differentiation, macro/microvascular invasion, bile duct invasion, intra-tumoral fat and molecular factors, and their value as prognostic imaging biomarkers have been reported. And recently, genome-based...

article

Pathology and images of radiation-induced hepatitis: a review article

Shigeyuki Takamatsu, Kazuto Kozaka, Satoshi Kobayashi, Norihide Yoneda, more

Japanese Journal of Radiology > 2018 > 36 > 4 > 241-256

Recent advances in highly conformal radiotherapies greatly extend the indications for radiotherapy of liver tumors. However, because of poor tolerance to hepatic radiation, estimation of the intensity of irradiation of the liver is important, particularly for a cirrhotic liver. Knowledge of radiation-induced hepatitis is important for understanding how to optimize hepatic radiation therapy. Pathological...

article

Photoacoustic imaging of tumour vascular permeability with indocyanine green in a mouse model

Kenichiro Okumura, Kotaro Yoshida, Kazuaki Yoshioka, Sho Aki, more

European Radiology Experimental > 2018 > 2 > 1 > 1-9

Background We analysed the haemodynamics of indocyanine green (ICG) in mouse organs and tumours and evaluated responses to anti-angiogenic agents in an allograft tumour mouse model by photoacoustic imaging. Methods Thirty-six male mice (aged 10–14 weeks; body weight 20–25 g) were used. Real-time photoacoustic imaging of organs and tumours after intravenous injection of ICG was conducted in mice...

article

Gadoxetic acid‐enhanced magnetic resonance imaging reflects co‐activation of β‐catenin and hepatocyte nuclear factor 4α in hepatocellular carcinoma

Azusa Kitao, Osamu Matsui, Norihide Yoneda, Kazuto Kozaka, more

Hepatology Research > 48 > 2 > 205 - 216

Aim The aim of this study is to clarify the correlation of the co‐activation of β‐catenin and hepatocyte nuclear factor (HNF)4α with the findings of gadoxetic acid‐enhanced magnetic resonance imaging (MRI), organic anion transporting polypeptide (OATP)1B3 expression, and histological findings in hepatocellular carcinoma (HCC). Methods One hundred and ninety‐six HCCs surgically resected from 174...

article

Peri-tumoral hyperintensity on hepatobiliary phase of gadoxetic acid-enhanced MRI in hepatocellular carcinomas: correlation with peri-tumoral hyperplasia and its pathological features

Norihide Yoneda, Osamu Matsui, Azusa Kitao, Takahiro Komori, more

Abdominal Radiology > 2018 > 43 > 8 > 2103-2112

Purpose Peri-tumoral hyperintensity (P-hyperintensity) is occasionally seen in hepatocellular carcinoma (HCC) on the hepatobiliary (HB) phase of gadoxetic acid-enhanced MRI (EOB-MRI). A recent study reported peri-tumoral hyperplasia (P-hyperplasia) associated with over-expression of glutamine synthetase (GS) in HCC or metastatic carcinoma. The aim of this study was to analyze the correlation between...

article

Is the combination of MR and CT findings useful in determining the tumor grade of pancreatic neuroendocrine tumors?

Fumihito Toshima, Dai Inoue, Takahiro Komori, Kotaro Yoshida, more

Japanese Journal of Radiology > 2017 > 35 > 5 > 242-253

Purpose To retrospectively elucidate the findings useful in determining the tumor grade of pancreatic neuroendocrine tumors (PNETs) by combined assessment of magnetic resonance (MR) and dynamic computed tomography (CT) images. Materials and methods Eighty-nine patients with PNETs (96 lesions) were included, and classified as G1, 59; G2, 29; and G3, 8 lesions. Image analysis included lesion diameter,...

article

Extrahepatic Arteries Originating from Hepatic Arteries: Analysis Using CT During Hepatic Arteriography and Visualization on Digital Subtraction Angiography

Kumi Ozaki, Satoshi Kobayashi, Osamu Matsui, Tetsuya Minami, more

CardioVascular and Interventional Radiology > 2017 > 40 > 6 > 822-830

Purpose To investigate the prevalence and site of origin of extrahepatic arteries originating from hepatic arteries on early phase CT during hepatic arteriography (CTHA) was accessed. Visualization of these elements on digital subtraction hepatic angiography (DSHA) was assessed using CTHA images as a gold standard. Materials and Methods A total of 943 patients (mean age 66.9 ± 10.3 years; male/female,...

article

Familial discrepancy of clinical outcomes associated with fibrinogen Dorfen: A case of huge genital hematoma after episiotomy

Kyosuke Kagami, Rena Yamazaki, Tetsuya Minami, Nobuo Okumura, more

Journal of Obstetrics and Gynaecology Research > 42 > 6 > 722 - 725

This study demonstrates a case of a huge genital hematoma after delivery, associated with fibrinogen Dorfen. Fibrinogen Dorfen is the mutation of a fibrinogen‐coded exon gene, which has a single heterozygous GCC → GTC transition at codon 289 of the γ gene, predicting an Ala → Val substitution. Because Ala289 plays a crucial role in maintaining the structure of the polymerization site of hole ‘a’ via...

article

Adenosquamous carcinoma of pancreas: CT and MR imaging features in eight patients, with pathologic correlations and comparison with adenocarcinoma of pancreas

Fumihito Toshima, Dai Inoue, Kotaro Yoshida, Norihide Yoneda, more

Abdominal Radiology > 2016 > 41 > 3 > 508-520

Purpose To reveal the CT and MR imaging features of adenosquamous carcinoma of pancreas (ASqC) in eight patients. Methods This study was approved by our institutional review board. Eight patients with ASqC were included in this study. Radiologic and pathologic findings were reviewed in each lesion. Additionally, radiologic imaging findings were compared between ASqC and controlled adenocarcinoma...

article

Forcible Intraarterial Injection of a Nonadhesive Liquid Embolic Agent under Microballoon Occlusion: Experimental Study in Swine Liver

Takahiro Ogi, Osamu Matsui, Junichiro Sanada, Tetsuya Minami, more

Journal of Vascular and Interventional Radiology > 2014 > 25 > 4 > 579-585.e2

To evaluate the feasibility and effectiveness of transcatheter embolization by forcible intraarterial injection of a mixture of ethylene vinyl alcohol copolymer (EVAL) and ethanol under microballoon occlusion compared with conventional transcatheter arterial embolization methods in nontumoral swine liver.Nine swine were divided into three groups: embolization with EVAL/ethanol mixture (EVAL group,...

article

Small needle puncture of a central venous occlusion in a hemodialysis patient that could not be traversed by a conventional technique

Shiro Miyayama, Tetsuya Minami, Kazuto Kozaka, Yasuyuki Ushiogi

Cardiovascular Intervention and Therapeutics > 2014 > 29 > 3 > 261-265

A 75-year-old woman with hemodialysis-related right subclavian vein occlusion was referred to our hospital for retry of endovascular treatment. The occluded segment could not be crossed via either antegrade or retrograde approaches, including puncturing the obstruction with the stiff end of the guide wire. The obstruction was successfully punctured using a 75-cm long 21-G needle via the right median...

article

Guidelines on the use of gelatin sponge particles in embolotherapy

Shiro Miyayama, Koichiro Yamakado, Hiroshi Anai, Daisuke Abo, more

Japanese Journal of Radiology > 2014 > 32 > 4 > 242-250

Gelatin sponge (GS) is one of the most widely used embolic agents in interventional procedures. There are four commercially available GS products in Japan; however, the endovascular use of Gelfoam and Spongel is off-label, and Gelpart can only be used for hepatic artery embolization and Serescue can only be used for hemostasis of arterial bleeding. GS has been used for a variety of clinical indications,...

article

Hemodynamics and progression of a hypervascular focus in a borderline lesion of hepatocellular carcinoma: analysis by angiography-assisted CT and histopathology

Tamao Endo, Kazuto Kozaka, Satoshi Kobayashi, Junichiro Sanada, more

Japanese Journal of Radiology > 2014 > 32 > 2 > 69-79

Purpose To investigate the hemodynamics and progression of a hypervascular focus (HF) in a borderline lesion by dual-phase CT during hepatic arteriography (CTHA) and reveal the process of the transformation to hypervascular overt hepatocellular carcinoma (HCC). Materials and methods This study was performed with the approval of our institutional ethics committee, and informed consent for the retrospective...

article

Hepatic arterial infusion chemotherapy with gemcitabine and 5-FU or Oral S-1 improve the prognosis of patients with postoperative liver metastases from pancreatic cancer

Hidehiro Tajima, Hirohisa Kitagawa, Masahisa Shoji, Shin-ichi Nakanuma, more

Pancreatology > 2013 > 13 > 4 Supplement > S39

article

Usefulness of Gd‐EOB‐DTPA‐enhanced MR imaging in the evaluation of simple steatosis and nonalcoholic steatohepatitis

Zhuo Wu, Osamu Matsui, Azusa Kitao, Kazuto Kozaka, more

Journal of Magnetic Resonance Imaging > 37 > 5 > 1137 - 1143

Purpose:To evaluate the usefulness of gadolinium ethoxybenzyl diethylenetriaminepentaacetic acid (Gd‐EOB‐DTPA)‐enhanced MR imaging (EOB‐MRI) in differentiating between simple steatosis and nonalcoholic steatohepatitis (NASH), as compared with MR in‐phase/out‐of‐phase imaging. The correlations between the MR features and histological characteristics were preliminarily investigated. Materials and Methods:From...

article

Hepatic pseudolymphoma: imaging–pathologic correlation with special reference to hemodynamic analysis

Kotaro Yoshida, Satoshi Kobayashi, Osamu Matsui, Toshifumi Gabata, more

Abdominal Radiology > 2013 > 38 > 6 > 1277-1285

Objectives To clarify radiological findings and hemodynamic characteristics of hepatic pseudolymphoma, as compared with the histopathological findings. Methods Radiological findings of ten histopathologically confirmed hepatic pseudolymphomas in seven patients were examined using US, CT, and MRI. Six patients also underwent angiography-assisted CT, including CT during arterial portography (CTAP)...

article

Intrahepatic periportal high intensity on hepatobiliary phase images of Gd-EOB-DTPA-enhanced MRI: imaging findings and prevalence in various hepatobiliary diseases

Satoshi Kobayashi, Osamu Matsui, Toshifumi Gabata, Wataru Koda, more

Japanese Journal of Radiology > 2013 > 31 > 1 > 9-15

Purpose To reveal the incidence and degree of intrahepatic periportal high intensity (PHI) on hepatobiliary phase images of Gd-EOB-DTPA-enhanced MRI (EOB-MRI) in patients with or without various hepatobiliary diseases. Materials and methods Patients with normal liver (N = 256) and those with hepatic disorder (N = 857) who underwent EOB-MRI were the subjects in this study. Incidence of PHI was evaluated...

article

Confluent hepatic fibrosis in liver cirrhosis: possible relation with middle hepatic venous drainage

Kumi Ozaki, Osamu Matsui, Toshifumi Gabata, Satoshi Kobayashi, more

Japanese Journal of Radiology > 2013 > 31 > 8 > 530-537

Purpose Our aim was to retrospectively analyze the location of confluent hepatic fibrosis in relation to the portal and hepatic venous anatomy using multidetector computed tomography (CT) and to clarify the influence of the hepatic venous drainage on confluent fibrosis. Materials and methods The study population consisted of 879 patients diagnosed with cirrhosis: 539 men and 340 women (65.9 ± 10...

article

Intranodular signal intensity analysis of hypovascular high-risk borderline lesions of HCC that illustrate multi-step hepatocarcinogenesis within the nodule on Gd–EOB–DTPA-enhanced MRI

Satoshi Kobayashi, Osamu Matsui, Toshifumi Gabata, Wataru Koda, more

European Journal of Radiology > 2012 > 81 > 12 > 3839-3845

To analyze intranodular signal intensity pattern of hypovascular high-risk borderline lesions of HCC that illustrate multi-step hepatocarcinogenesis within the nodule on Gd–EOB–DTPA-enhanced MRI.A total of 73 nodules showing hypervascular foci in hypovascular high-risk borderline lesions identified by angiography-assisted CT were included in this study. The intranodular signal intensities of both...

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Search results for: Tetsuya Minami

Risk factors for local recurrence of hepatocellular carcinoma after transcatheter arterial chemoembolization with drug-eluting beads (DEB-TACE)

Current status of imaging biomarkers predicting the biological nature of hepatocellular carcinoma

Pathology and images of radiation-induced hepatitis: a review article

Photoacoustic imaging of tumour vascular permeability with indocyanine green in a mouse model

Gadoxetic acid‐enhanced magnetic resonance imaging reflects co‐activation of β‐catenin and hepatocyte nuclear factor 4α in hepatocellular carcinoma

Peri-tumoral hyperintensity on hepatobiliary phase of gadoxetic acid-enhanced MRI in hepatocellular carcinomas: correlation with peri-tumoral hyperplasia and its pathological features

Is the combination of MR and CT findings useful in determining the tumor grade of pancreatic neuroendocrine tumors?

Extrahepatic Arteries Originating from Hepatic Arteries: Analysis Using CT During Hepatic Arteriography and Visualization on Digital Subtraction Angiography

Familial discrepancy of clinical outcomes associated with fibrinogen Dorfen: A case of huge genital hematoma after episiotomy

Adenosquamous carcinoma of pancreas: CT and MR imaging features in eight patients, with pathologic correlations and comparison with adenocarcinoma of pancreas

Forcible Intraarterial Injection of a Nonadhesive Liquid Embolic Agent under Microballoon Occlusion: Experimental Study in Swine Liver

Small needle puncture of a central venous occlusion in a hemodialysis patient that could not be traversed by a conventional technique

Guidelines on the use of gelatin sponge particles in embolotherapy

Hemodynamics and progression of a hypervascular focus in a borderline lesion of hepatocellular carcinoma: analysis by angiography-assisted CT and histopathology

Hepatic arterial infusion chemotherapy with gemcitabine and 5-FU or Oral S-1 improve the prognosis of patients with postoperative liver metastases from pancreatic cancer

Usefulness of Gd‐EOB‐DTPA‐enhanced MR imaging in the evaluation of simple steatosis and nonalcoholic steatohepatitis

Hepatic pseudolymphoma: imaging–pathologic correlation with special reference to hemodynamic analysis

Intrahepatic periportal high intensity on hepatobiliary phase images of Gd-EOB-DTPA-enhanced MRI: imaging findings and prevalence in various hepatobiliary diseases

Confluent hepatic fibrosis in liver cirrhosis: possible relation with middle hepatic venous drainage

Intranodular signal intensity analysis of hypovascular high-risk borderline lesions of HCC that illustrate multi-step hepatocarcinogenesis within the nodule on Gd–EOB–DTPA-enhanced MRI

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