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Japanese Journal of Radiology

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https://www.readbyqxmd.com/read/28110435/comparison-between-solid-component-size-on-thin-section-ct-and-pathologic-lymph-node-metastasis-and-local-invasion-in-t1-lung-adenocarcinoma
#1
Hideyuki Hayashi, Kazuto Ashizawa, Yukihiro Ogihara, Akifumi Nishida, Keitaro Matsumoto, Naoya Yamasaki, Takeshi Nagayasu, Minoru Fukuda, Sumihisa Honda, Masataka Uetani
OBJECTIVES: To correlate the tumor size and solid component size on thin-section CT (TS-CT) with pathological findings including lymph node (LN) metastasis and local invasion in T1 lung adenocarcinoma. METHODS: 188 patients with surgically resected T1 lung adenocarcinoma were retrospectively analyzed. Two chest radiologists measured the long-axis and short-axis dimensions of nodules and solid components with a lung and/or a mediastinal window setting (WS) on TS-CT...
January 21, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28105599/t1-mapping-using-saturation-recovery-single-shot-acquisition-at-3-tesla-magnetic-resonance-imaging-in-hypertrophic-cardiomyopathy-comparison-to-late-gadolinium-enhancement
#2
Ryo Ogawa, Tomoyuki Kido, Masashi Nakamura, Teruhito Kido, Akira Kurata, Teruyoshi Uetani, Akiyoshi Ogimoto, Masao Miyagawa, Teruhito Mochizuki
PURPOSE: We evaluated the T1 values of segments and slices and the reproducibility in healthy controls, using saturation recovery single-shot acquisition (SASHA) at 3T magnetic resonance imaging. Moreover, we examined the difference in T1 values between hypertrophic cardiomyopathy (HCM) and healthy controls, and compared those with late gadolinium enhancement (LGE). MATERIALS AND METHODS: Twenty-one HCM patients and 10 healthy controls underwent T1 mapping before and after contrast administration...
January 19, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28091837/peritoneal-fluid-of-low-ct-hounsfield-units-as-a-screening-criterion-for-traumatic-bowel-perforation
#3
Yon-Cheong Wong, Li-Jen Wang, Cheng-Hsien Wu, Huan-Wu Chen, Being-Chuan Lin, Yu-Pao Hsu
PURPOSE: To investigate whether peritoneal fluid of low CT Hounsfield units is an important screening criterion for traumatic bowel perforation. MATERIALS AND METHODS: We performed a retrospective study on two cohorts of blunt trauma patients who had peritoneal fluid. Intravenous and oral contrast was used for the first cohort (61 patients) as opposed to intravenous contrast only for the second cohort (60 patients). We compared the CT Hounsfield units of peritoneal fluid with bowel perforation...
January 13, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28074381/adrenal-hormones-before-and-after-venography-during-adrenal-venous-sampling-a-self-controlled-study
#4
Yuya Koike, Seishi Matsui, Masao Omura, Kohzoh Makita, Alfonso W D Obara, Nobukazu Moriya, Tetsuo Nishikawa
OBJECTIVE: A stress reaction involving increased adrenal hormone release occurs when starting adrenal venous sampling (AVS). The purpose of the present study was to investigate the effect of single shot venography on adrenal hormone production during AVS. SUBJECTS AND METHODS: This was a prospective self-controlled study. We enrolled 54 consecutive patients (21 men, 33 women; mean age 52 ± 11 years) with primary aldosteronism who underwent AVS from May 2014 to February 2015...
January 10, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28074380/usefulness-of-diffusion-weighted-mr-imaging-for-differentiating-between-warthin-s-tumor-and-oncocytoma-of-the-parotid-gland
#5
Hiroki Kato, Keita Fujimoto, Masayuki Matsuo, Keisuke Mizuta, Mitsuhiro Aoki
PURPOSE: To assess the efficacy of diffusion-weighted (DW) MR imaging for differentiating between Warthin's tumor and oncocytoma of the parotid gland. METHODS: Forty-five histopathologically confirmed parotid gland tumors (41 Warthin's tumors and 4 oncocytomas) were examined by MR imaging including DW imaging. (18)F-fluorodeoxyglucose PET/CT was also performed in 9 Warthin's tumors and 3 oncocytomas. We retrospectively reviewed the images and compared the MR signal intensities, apparent diffusion coefficients (ADCs), and maximum standardized uptake values (SUVmax) of the solid components between the two pathologies...
January 10, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28074379/neuroimaging-findings-of-congenital-zika-virus-infection-a-pictorial-essay
#6
Mohammad Zare Mehrjardi, Andrea Poretti, Thierry A G M Huisman, Heron Werner, Elham Keshavarz, Edward Araujo Júnior
Zika virus (ZIKV) is a mosquito-borne arbovirus from the Flaviviridae family. It had caused several epidemics since its discovery in 1947, but there was no significant attention to this virus until the recent outbreak in Brazil in 2015. The main concern is the causal relationship between prenatal ZIKV infection and congenital microcephaly, which has been confirmed recently. Moreover, ZIKV may cause other central nervous system abnormalities such as brain parenchymal atrophy with secondary ventriculomegaly, intracranial calcification, malformations of cortical development (such as polymicrogyria, and lissencephaly-pachygyria), agenesis/hypoplasia of the corpus callosum, cerebellar and brainstem hypoplasia, sensorineural hearing-loss, and ocular abnormalities as well as arthrogryposis in the infected fetuses...
January 10, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28074378/neuroimaging-findings-of-zika-virus-infection-emphasis-of-the-emerging-global-threat
#7
LETTER
Mohammad Zare Mehrjardi
No abstract text is available yet for this article.
January 10, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28044222/scrub-typhus-radiological-and-clinical-findings-in-abdominopelvic-involvement
#8
Kun Yung Kim, Ji Soo Song, Eun Hae Park, Gong Yong Jin
PURPOSE: To describe the clinical and radiological findings of abdominopelvic involvement in scrub typhus. MATERIALS AND METHODS: Abdominopelvic computed tomography (CT) of 78 patients with scrub typhus were evaluated by two readers. The presence of gallbladder wall thickening, arterial inhomogeneous enhancement of the liver, periportal edema, splenic infarction, hepatomegaly, splenomegaly, ascites, pleural effusion, and sites of lymphadenopathy were evaluated. Patients were divided into four clinical subgroups according to laboratory findings...
January 2, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27909957/adaptive-radiation-therapy-in-head-and-neck-cancer-for-clinical-practice-state-of-the-art-and-practical-challenges
#9
REVIEW
Ovidiu Veresezan, Idriss Troussier, Alexis Lacout, Sarah Kreps, Sophie Maillard, Aude Toulemonde, Pierre-Yves Marcy, Florence Huguet, Juliette Thariat
Modern radiation therapy techniques are characterized by high conformality to tumor volumes and steep dose gradients to spare normal organs. These techniques require accurate clinical target volume definitions and rigorous assessment of set up uncertainties using image guidance, a concept called image-guided radiation therapy. Due to alteration of patient anatomy, changes in tissue density/volumes and tumor shrinkage over the course of treatment, treatment accuracy may be challenged. This may result in excessive irradiation of organs at risk/healthy tissues and undercoverage of target volumes with a significant risk of locoregional failure...
December 1, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27896560/neuroimaging-findings-of-zika-virus-infection-beyond-the-brain-ct-scans
#10
LETTER
Alfonso J Rodriguez-Morales
No abstract text is available yet for this article.
November 28, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27873171/prognostic-value-of-lower-limb-perfusion-single-photon-emission-computed-tomography-computed-tomography-in-patients-with-lower-limb-atherosclerotic-peripheral-artery-disease
#11
Hidenobu Hashimoto, Yoshimitsu Fukushima, Shin-Ichiro Kumita, Masaaki Miyamoto, Gen Takagi, Junichi Yamazaki, Takanori Ikeda
PURPOSE: The purpose of this study was to estimate the severity of the participants' lower limb ischemia by calculating the lower limb muscle-to-background ratio (LMBR) using lower limb perfusion single-photon emission computed tomography-computed tomography (SPECT/CT) and to evaluate the prognostic value of LMBR in peripheral artery disease (PAD) patients. MATERIALS AND METHODS: This retrospective study consists of 38 patients with PAD (70 ± 12 years) and observed over 1 year who were included in the analysis...
November 21, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27864664/radiofrequency-ablation-of-pulmonary-metastases-from-sarcoma-single-center-retrospective-evaluation-of-46-patients
#12
Takuya Sato, Toshihiro Iguchi, Takao Hiraki, Hideo Gobara, Hiroyasu Fujiwara, Jun Sakurai, Yusuke Matsui, Toshiharu Mitsuhashi, Junichi Soh, Shinichi Toyooka, Susumu Kanazawa
PURPOSE: This retrospective, single-center study evaluated radiofrequency (RF) ablation for pulmonary metastases of sarcoma. MATERIALS AND METHODS: Forty-six patients with sarcoma (144 pulmonary metastases) underwent 88 RF ablation sessions. Data regarding local tumor progression, efficacy, procedural adverse events (AEs; National Cancer Institute Common Terminology Criteria for Adverse Events, version 4.0), overall survival (OS), and OS-associated prognostic factors were retrospectively evaluated using univariate analyses...
November 18, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27830429/neuroimaging-findings-of-zika-virus-infection-emphasis-of-congenital-versus-acquired-aspects
#13
LETTER
Mohammad Zare Mehrjardi, Andrea Poretti, Elham Keshavarz
No abstract text is available yet for this article.
November 9, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27822778/in-vivo-effects-of-radiofrequency-ablation-on-long-bones-and-the-repair-process-in-swine-models
#14
Wei Zhao, Jin-Zhou Chen, Ji-Hong Hu, Jian-Qiang Huang, Yong-Neng Jiang, Gang Luo, Gen-Fa Yi, Zhao-Hong Peng, Hui Wang, Jin Shen, Bu-Lang Gao
PURPOSE: To investigate in vivo effect of radiofrequency ablation (RFA) on swine long bones and the repair process. MATERIALS AND METHODS: RFA was performed in six swine at the end and middle part of the tibia or femur. After RFA, radiological examinations were performed, and the swine were killed immediately and at different time points post-RFA for histopathological examination. RESULTS: All swine had successful RFA. The RFA-induced elliptical necrotic area ranged from 3...
November 7, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27812958/the-physiological-accumulation-of-fdg-in-the-muscles-in-relation-to-the-side-of-intravenous-administration
#15
Yoichi Otomi, Takayoshi Shinya, Naoto Uyama, Yuta Arai, Kanako Miyamoto, Katsuya Takechi, Michiko Kubo, Hideki Otsuka, Masafumi Harada
PURPOSE: The purpose of the study was to evaluate the physiological accumulation of (18)F-FDG in the muscles in relation to the side of intravenous administration. MATERIALS AND METHODS: We retrospectively investigated 3,118 (18)F-FDG-PET/CT examinations. We evaluated the physiological accumulation of FDG in the muscles of the shoulder and arm relative to its dependence on the side of intravenous administration. RESULTS: Six hundred six of the 3,118 examinations (19...
November 3, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27807795/can-we-shorten-the-q-space-imaging-to-make-it-clinically-feasible
#16
Koji Sakai, Kei Yamada, Kentaro Akazawa, Jun Tazoe, Masashi Yasuike, Hitomi Nagano, Hiroyasu Ikeno, Toshiaki Nakagawa
PURPOSE: Q-space imaging (QSI) is a novel magnetic resonance imaging (MRI) technique that enables assessment of micro-structural changes of white matter. The acquisition time, however, is comparatively long to use for routine clinical assessment. Therefore, the present study investigated the clinically feasible b value combinations to measure the water molecular displacement probability density function (PDF) in healthy subjects. METHODS: The subjects consisted of five healthy volunteers (1 female and 4 male; 40...
November 2, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27804004/neuroimaging-findings-of-zika-virus-infection
#17
LETTER
Viroj Wiwanitkit
No abstract text is available yet for this article.
November 1, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27787666/neurite-orientation-dispersion-and-density-imaging-for-evaluation-of-corticospinal-tract-in-idiopathic-normal-pressure-hydrocephalus
#18
Ryusuke Irie, Kohei Tsuruta, Masaaki Hori, Michimasa Suzuki, Koji Kamagata, Atsushi Nakanishi, Kouhei Kamiya, Madoka Nakajima, Masakazu Miyajima, Hajime Arai, Shigeki Aoki
PURPOSE: To evaluate diffusional changes of the corticospinal tract (CST) in patients with idiopathic normal pressure hydrocephalus (iNPH) by neurite orientation dispersion and density imaging (NODDI). MATERIALS AND METHODS: Nineteen patients with iNPH and 12 healthy controls were included. Diffusion MRI data for NODDI were acquired with a 3-T system, using 32 motion-probing gradient directions with six b-values (from 0 to 2500 s/mm(2)). The orientation dispersion index (ODI), intra-cellular volume fraction (Vic), and isotropic volume fraction (Viso) of the CST were calculated by tract-specific analysis in patients and controls...
October 27, 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28070794/emerging-neuroradiological-topics-in-journals-from-related-societies
#19
EDITORIAL
Yukunori Korogi, Shinji Naganawa
No abstract text is available yet for this article.
January 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27909933/jjr-our-next-step
#20
EDITORIAL
Nagara Tamaki
No abstract text is available yet for this article.
December 2016: Japanese Journal of Radiology
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