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Japanese Journal of Radiology

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https://www.readbyqxmd.com/read/28205100/efficacy-of-oral-supplemental-hydration-for-the-prevention-of-contrast-induced-nephropathy-in-rats
#1
Tamaki Matsunami, Kazuo Hino, Rie Dosho, Sho Miyatake, Goro Ebisu, Ryohei Kuwatsuru
PURPOSE: To compare oral rehydration solution (ORS) with saline infusion for preventing contrast-induced nephropathy (CIN) in a rat model. MATERIALS AND METHODS: Adult male Sprague-Dawley rats (310-360 g) received intravenous indomethacin (10 mg/kg), N (G)-nitro-L-arginine methyl ester (10 mg/kg), and iohexol (10 mL/kg) to induce acute contrast-induced renal injury (CIN group); control rats received saline only. For hydration, rats received either continuous infusion (20 mL/kg/h) of saline or three oral doses (20 mL/kg each) of ORS...
February 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28197821/evaluation-of-glymphatic-system-activity-with-the-diffusion-mr-technique-diffusion-tensor-image-analysis-along-the-perivascular-space-dti-alps-in-alzheimer-s-disease-cases
#2
Toshiaki Taoka, Yoshitaka Masutani, Hisashi Kawai, Toshiki Nakane, Kiwamu Matsuoka, Fumihiko Yasuno, Toshifumi Kishimoto, Shinji Naganawa
PURPOSE: The activity of the glymphatic system is impaired in animal models of Alzheimer's disease (AD). We evaluated the activity of the human glymphatic system in cases of AD with a diffusion-based technique called diffusion tensor image analysis along the perivascular space (DTI-ALPS). MATERIALS AND METHODS: Diffusion tensor images were acquired to calculate diffusivities in the x, y, and z axes of the plane of the lateral ventricle body in 31 patients. We evaluated the diffusivity along the perivascular spaces as well as projection fibers and association fibers separately, to acquire an index for diffusivity along the perivascular space (ALPS-index) and correlated them with the mini mental state examinations (MMSE) score...
February 14, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28197820/lung-cancer-screening-with-ultra-low-dose-ct-using-full-iterative-reconstruction
#3
Masayo Fujita, Toru Higaki, Yoshikazu Awaya, Toshio Nakanishi, Yuko Nakamura, Fuminari Tatsugami, Yasutaka Baba, Makoto Iida, Kazuo Awai
PURPOSE: To investigate the diagnostic capability of ultra-low-dose CT (ULDCT) with full iterative reconstruction (f-IR) for lung cancer screening. MATERIALS AND METHODS: All underwent ULDCT and/or low-dose CT (LD-CT) on a 320-detector scanner. ULDCT images were reconstructed with f-IR. We qualitatively and quantitatively studied 95 nodules in 69 subjects. Two radiologists classified the nodules on ULDCT images as solid-, part-solid-, and pure ground-glass (PGG) and recorded their mean size...
February 14, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28160228/respiratory-gating-and-multifield-technique-radiotherapy-for-esophageal-cancer
#4
Atsushi Ohta, Motoki Kaidu, Satoshi Tanabe, Satoru Utsunomiya, Ryuta Sasamoto, Katsuya Maruyama, Kensuke Tanaka, Hirotake Saito, Toshimichi Nakano, Miki Shioi, Haruna Takahashi, Naotaka Kushima, Eisuke Abe, Hidefumi Aoyama
PURPOSE: To investigate the effects of a respiratory gating and multifield technique on the dose-volume histogram (DVH) in radiotherapy for esophageal cancer. METHODS AND MATERIALS: Twenty patients who underwent four-dimensional computed tomography for esophageal cancer were included. We retrospectively created the four treatment plans for each patient, with or without the respiratory gating and multifield technique: No gating-2-field, No gating-4-field, Gating-2-field, and Gating-4-field plans...
February 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28160227/assessment-of-brain-core-temperature-using-mr-dwi-thermometry-in-alzheimer-disease-patients-compared-to-healthy-subjects
#5
Gianvincenzo Sparacia, Koji Sakai, Kei Yamada, Giovanna Giordano, Rosalia Coppola, Massimo Midiri, Luigi Maria Grimaldi
PURPOSE: To assess the brain core temperature of Alzheimer disease (AD) patients in comparison with healthy volunteers using diffusion-weighted thermometry. MATERIALS AND METHODS: Fourteen AD patients (3 men, 11 women; age range 60-81 years, mean age 73.8 ± 6.1 years) and 14 healthy volunteers, age and sex-matched (mean age 70.1 ± 6.9 years; range 62-84 years; 5 men, 9 women) underwent MR examination between February 2014 and March 2016. MR imaging studies were performed with a 1...
February 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28144896/temporal-evolution-of-the-signal-intensity-of-hyper-acute-ischemic-lesions-in-a-canine-stroke-model-influence-of-hyperintense-acute-reperfusion-marker
#6
Xiao-Quan Xu, Chen-Jiang Wu, Qing-Quan Zu, Shan-Shan Lu, Xing-Long Liu, Qian-Qian Gao, Sheng Liu, Hai-Bin Shi
BACKGROUND: To assess the influence of the hyperintense acute reperfusion marker (HARM) on the relative signal intensity (rSI) and apparent diffusion coefficient (ADC) of hyper-acute ischemic lesions in a canine stroke model. METHODS: Middle cerebral artery occlusion models were established using autologous clot embolization. Diffusion-weighted (DW) and fluid-attenuated inversion recovery (FLAIR) imaging was performed at 1, 2, 3, 4.5 and 6 h after embolization...
January 31, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28144895/abnormal-regional-homogeneity-and-functional-connectivity-in-adjustment-disorder-of-new-recruits-a-resting-state-fmri-study
#7
Hui Li, Yuning Lin, Ji Chen, Xiaoyang Wang, Qingqing Wu, Qi Li, Ziqian Chen
PURPOSE: To explore the regional spontaneous neural activity and functional connectivity alterations of adjustment disorder (AD) in new recruits with in vivo resting-state functional MR (rs-fMRI). MATERIALS AND METHODS: Resting-state fMRI was performed in 31 recruits with AD and in 31 control recruits. Regional homogeneity (ReHo) was used to detect the regional synchronizing features of neuronal activations. Correlative analysis was performed to investigate the relationship between the Symptom Check List-90 (SCL-90) score and ReHo in regions with significant group differences...
January 31, 2017: Japanese Journal of Radiology
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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/28070794/emerging-neuroradiological-topics-in-journals-from-related-societies
#18
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
#19
EDITORIAL
Nagara Tamaki
No abstract text is available yet for this article.
December 2016: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/27796727/diagnostic-performance-of-noninvasive-fractional-flow-reserve-derived-from-coronary-computed-tomography-angiography-in-ischemia-causing-coronary-stenosis-a-meta-analysis
#20
Aimin Ding, Guoqing Qiu, Wensheng Lin, Ling Hu, Guangliang Lu, Xiang Long, Xin Hong, Yaohua Chen, Xiaoping Luo, Qinqin Tang, Dongqin Deng
PURPOSE: Fractional flow reserve based on coronary computed tomographic angiography (CCTA; FFRCT) can evaluate functional severity in coronary artery disease (CAD). This study investigated the diagnostic value of FFRCT for determining CAD severity. MATERIALS AND METHODS: Medline, Cochrane, EMBASE, and Google Scholar databases were searched until June 16, 2016 using the following search terms: fractional flow reserve, coronary computed tomography angiography, myocardial ischemia...
December 2016: Japanese Journal of Radiology
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