journal
MENU ▼
Read by QxMD icon Read
search

Japanese Journal of Radiology

journal
https://www.readbyqxmd.com/read/28421397/comparison-between-the-four-field-box-and-field-in-field-techniques-for-conformal-radiotherapy-of-the-esophagus-using-dose-volume-histograms-and-normal-tissue-complication-probabilities
#1
Farzaneh Allaveisi, Amir Nami Moghadam
PURPOSE: We evaluated and compared the performance of the field-in-field (FIF) to that of the four-field box (4FB) technique regarding dosimetric and radiobiological parameters for radiotherapy of esophageal carcinoma. MATERIALS AND METHODS: Twenty patients with esophageal cancer were selected. For each patient, two treatment plans were created: 4FB and FIF. The parameters compared included the conformity index (CI), homogeneity index (HI), D mean, D max, tumor control probability (TCP), V 20Gy and V 30Gy of the heart and lungs, normal tissue complication probability (NTCP), and monitor units per fraction (MU/fr)...
April 18, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28421396/-11-c-methionine-pet-ct-findings-in-benign-brain-disease
#2
REVIEW
Reiko Nakajima, Ken Kimura, Koichiro Abe, Shuji Sakai
(11)C-methionine (MET) is one of the most commonly used positron emission tomography (PET) tracers for evaluation of malignant brain tumor, with MET-PET being a sensitive technique for visualization of primary and recurrent malignant brain tumors. However, previous reports have demonstrated MET uptake in lesions associated with benign brain diseases. These diseases usually show an increase in MET uptake similar to that of malignant tumors. This pitfall in MET-PET image interpretation is important not only for nuclear medicine professionals, but also for radiologists...
April 18, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28421395/clinical-interpretation-of-asymptomatic-medial-collateral-ligament-injury-observed-on-magnetic-resonance-imaging-in-adolescent-baseball-players
#3
Kenta Tanaka, Yoshikazu Okamoto, Takeshi Makihara, Kiyoshi Maehara, Tomohiro Yoshizawa, Manabu Minami, Masashi Yamazaki
PURPOSE: Magnetic resonance imaging (MRI) of medial collateral ligament (MCL) injury of the elbow was often observed in asymptomatic adolescent baseball players. We aimed to clarify the clinical interpretation of "asymptomatic MCL injury observed on MRI" by comparing MRI, ultrasonography (US), and physical findings. MATERIALS AND METHODS: Sixty-four asymptomatic adolescent baseball players (mean 11.2 years) were enrolled. An open-type 0.2T MRI was used. MCL function was evaluated by measuring the opening of the ulnohumeral joint using US...
April 18, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28386823/modifying-the-planning-target-volume-to-optimize-the-dose-distribution-in-dynamic-conformal-arc-therapy-for-large-metastatic-brain-tumors
#4
Kengo Ogura, Yasuhiro Kosaka, Toshiyuki Imagumbai, Kazuhito Ueki, Ryo Narukami, Takayuki Hattori, Masaki Kokubo
PURPOSE: When treating large metastatic brain tumors with stereotactic radiotherapy (SRT), high dose conformity to target is difficult to achieve. Employing a modified planning target volume (mPTV) instead of the original PTV may be one way to improve the dose distribution in linear accelerator-based SRT using a dynamic conformal technique. In this study, we quantitatively analyzed the impact of a mPTV on dose distribution. MATERIALS AND METHODS: Twenty-four tumors with a maximum diameter of >2 cm were collected...
April 6, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28374213/contour-variations-of-the-body-and-tail-of-the-pancreas-evaluation-with-mdct
#5
Ahmad Khalid Omeri, Shunro Matsumoto, Maki Kiyonaga, Ryo Takaji, Yasunari Yamada, Kazuhisa Kosen, Hiromu Mori, Hidetoshi Miyake
PURPOSE: To analyze morphology/contour variations of the pancreatic body and tail in subjects free of pancreatic disease. METHODS: We retrospectively reviewed triple-phase, contrast-enhanced multi-detector row computed tomography (3P-CE-MDCT) examinations of 449 patients who had no clinical or CT evidence of pancreatic diseases. These patients were evaluated for morphologic/contour variations of the pancreatic body and tail, which were classified into two types...
April 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28357723/role-of-curative-treatment-in-patients-with-intermediate-stage-hepatocellular-carcinoma
#6
Yuichi Sugino, Koichiro Yamakado, Takashi Yamanaka, Masashi Fujimori, Atsuhiro Nakatsuka, Haruyuki Takaki, Yoshiyuki Takei, Hajime Sakuma, Shuji Isaji
PURPOSE: To retrospectively evaluate the role of curative treatment in patients with intermediate-stage hepatocellular carcinomas (HCCs), and to identify the subgroup having benefit from curative treatment. METHODS: From April 2000 to December 2014, 100 patients with intermediate-stage HCCs underwent either curative treatment (hepatectomy: n = 23, radiofrequency ablation (RFA); n = 29, both: n = 4) or transarterial chemoembolization (TACE): n = 44) as initial treatments for HCCs...
March 29, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28342041/utility-of-mr-imaging-in-the-evaluation-of-colon-cancer
#7
LETTER
Ali Kemal Sivrioglu, Serkan Aribal, Hakan Onder, Suzan Deniz Onol
No abstract text is available yet for this article.
March 24, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28293772/reading-efficiency-can-be-improved-by-minor-modification-of-assigned-duties-a-pilot-study-on-a-small-team-of-general-radiologists
#8
Hajime Yokota, Mariko Goto, Chisa Bamba, Maki Kiba, Kei Yamada
PURPOSE: To assess whether alterations in the type of duty assignment system can affect the reading efficiency and stress level of diagnostic radiologists. MATERIALS AND METHODS: Fourteen board-certified diagnostic radiologists were enrolled. We investigated three different reading systems for 1 week each. System 1 is our default, in which there are no assigned duties and everyone finishes when all cases are done. In system 2, two late shift readers are assigned every day, and, after everyone else leaves at a fixed time (5:30 p...
March 14, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28293771/usefulness-of-2d-fusion-of-postmortem-ct-and-antemortem-chest-radiography-studies-for-human-identification
#9
Norihiro Shinkawa, Toshinori Hirai, Ryuichi Nishii, Nobuhiro Yukawa
PURPOSE: To determine the feasibility of human identification through the two-dimensional (2D) fusion of postmortem computed tomography (PMCT) and antemortem chest radiography. MATERIALS AND METHODS: The study population consisted of 15 subjects who had undergone chest radiography studies more than 12 months before death. Fused images in which a chest radiograph was fused with a PMCT image were obtained for those subjects using a workstation, and the minimum distance gaps between corresponding anatomical landmarks (located at soft tissue and bone sites) in the images obtained with the two modalities were calculated...
March 14, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28281047/acute-and-late-complications-after-hypofractionated-intensity-modulated-radiotherapy-in-prostate-cancer
#10
Takuyo Kozuka, Masahiro Nakano, Masatoshi Hashimoto, Kotaro Gomi, Keiko Nemoto Murofushi, Minako Sumi, Junji Yonese, Masahiko Oguchi
PURPOSE: The present study compared the complications associated with hypofractionated intensity-modulated radiation therapy (Hypo-IMRT) of prostate cancer to conventionally fractionated IMRT (Conv-IMRT). MATERIALS AND METHODS: Hypo-IMRT delivered 70 Gy in 28 fractions, whereas Conv-IMRT delivered 78 Gy in 39 fractions. Toxicity was graded with the Common Terminology Criteria for Adverse Events, version 4.0, weekly during radiotherapy, 1 month after radiotherapy, and annually in both patient groups...
March 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28281046/successful-percutaneous-treatment-of-extrahepatic-cystic-echinococcosis-through-pair-and-single-puncture-catheter-techniques
#11
Serdar Arslan, Suleyman Bakdik, Fatih Oncu, Ismet Tolu, Mehmet Ali Eryilmaz
PURPOSE: To demonstrate the successful percutaneous treatment of extrahepatic cystic echinococcosis as an alternative to surgical procedures. MATERIALS AND METHODS: A total of 27 extrahepatic hydatid cysts in 12 patients, the spleen in 8 patients, muscles and soft tissues in 3 patients each and right adrenal gland in 1 patient were treated with PAIR (puncture, aspiration, injection, respiration) or single puncture catheterization methods. As a scolicidal and sclerosing agent, alcohol was used in all patients...
March 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28281045/diffuse-type-gastric-cancer-specific-enhancement-pattern-on-multiphasic-contrast-enhanced-computed-tomography
#12
Daisuke Tsurumaru, Mitsutoshi Miyasaka, Toshio Muraki, Yoshiki Asayama, Akihiro Nishie, Eiji Oki, Minako Hirahashi, Tomoyuki Hida, Hiroshi Honda
PURPOSE: To evaluate the enhancement pattern of diffuse-type gastric cancers (DGCs) on multiphasic contrast-enhanced computed tomography gastrography (CECTG). METHODS AND MATERIALS: We studied 21 consecutive clinically diagnosed DGC patients who underwent CECTG. Gastric distension was obtained using effervescent granules. CT images were obtained 40 s (arterial phase) and 240 s (delayed phase) after injection of a nonionic contrast material. Two radiologists reviewed the CT images and analyzed layers and enhancement patterns...
March 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28258323/is-the-combination-of-mr-and-ct-findings-useful-in-determining-the-tumor-grade-of-pancreatic-neuroendocrine-tumors
#13
Fumihito Toshima, Dai Inoue, Takahiro Komori, Kotaro Yoshida, Norihide Yoneda, Tetsuya Minami, Osamu Matsui, Hiroko Ikeda, Toshifumi Gabata
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, shape, enhancement pattern on arterial phase (AP) and delayed phase CT images, calcification, cystic portion, main pancreatic duct dilatation, signal-intensity on T1-, T2-weighted MR images, and appearance of apparent diffusion coefficient (ADC)...
March 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28255646/mr-imaging-and-mr-cholangiopancreatography-of-cholangiocarcinoma-developing-in-printing-company-workers
#14
Koichi Koyama, Shoji Kubo, Ai Ueki, Taro Shimono, Shigekazu Takemura, Shogo Tanaka, Masahiko Kinoshita, Genya Hamano, Yukio Miki
PURPOSE: To retrospectively investigate magnetic resonance (MR) imaging findings of occupational cholangiocarcinoma (oCC) occurring among workers in printing companies in Japan, compared to those of non-occupational cholangiocarcinoma (nCC), primary sclerosing cholangitis (PSC), and age-matched normal controls (NORs). MATERIALS AND METHODS: Participants comprised 27 consecutive patients (oCC, n = 5; nCC, n = 8; PSC, n = 6; NOR, n = 8) who underwent MR imaging between May 2009 and October 2012...
March 2, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28251499/comparison-of-gadoxetic-acid-enhanced-dynamic-mr-imaging-and-contrast-enhanced-computed-tomography-for-preoperative-evaluation-of-colorectal-liver-metastases
#15
Nobuyuki Asato, Masakatsu Tsurusaki, Keitaro Sofue, Yoko Hieda, Takashi Katsube, Kazuhiro Kitajima, Takamichi Murakami
PURPOSE: To evaluate the diagnostic efficacy of gadoxetic acid-enhanced magnetic resonance imaging (EOB-MRI) vs. contrast-enhanced computed tomography (CE-CT) in the detection of liver metastasis in colorectal carcinoma patients. MATERIALS AND METHODS: One-hundred fifty-eight consecutive patients with histopathologically confirmed colorectal carcinoma underwent EOB-MRI and CE-CT; 68 patients had 105 surgically confirmed liver metastases. Diagnostic analyses were performed according to sensitivity and positive predictive value (PPV) for liver metastasis detection in combined arterial- and hepatocyte-phase images vs...
March 1, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28247217/retrospective-study-of-24-cases-of-acute-appendiceal-diverticulitis-ct-findings-and-pathological-correlations
#16
Aytul Hande Yardimci, Ceyda Turan Bektas, Esra Pasaoglu, Erdem Kinaci, Cigdem Ozer, Mert Mahsuni Sevinc, Abdullah Soydan Mahmutoglu, Ozgur Kilickesmez
PURPOSE: Appendiceal diverticulitis is relatively rare and is difficult to distinguish clinically and radiologically from acute appendicitis. The aim of this study was to describe the computed tomography (CT) findings of acute appendiceal diverticulitis. MATERIALS AND METHODS: Among the 1329 patients who underwent appendectomy at our institution between January 2010 and July 2015, 28 were diagnosed pathologically with appendiceal diverticulitis, including 24 patients who were evaluated by preoperative CT...
February 28, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28243837/imaging-features-of-non-traumatic-vascular-liver-emergencies
#17
REVIEW
Mehmet Ruhi Onur, Ali Devrim Karaosmanoglu, Onur Akca, Osman Ocal, Erhan Akpinar, Musturay Karcaaltincaba
Acute non-traumatic liver disorders can originate from abnormalities of the hepatic artery, portal vein and hepatic veins. Ultrasonography and computed tomography can be used in non-traumatic acute vascular liver disorders according to patient status, indication and appropriateness of imaging modality. Awareness of the imaging findings, in the appropriate clinical context, is crucial for prompt and correct diagnosis, as delay may cause severe consequences with significant morbidity and mortality. This review article will discuss imaging algorithms, and multimodality imaging findings for suspected acute vascular disorders of the liver...
February 27, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28233194/clinical-utility-of-optimized-three-dimensional-t1-t2-and-t2-weighted-sequences-in-spinal-magnetic-resonance-imaging
#18
REVIEW
Nobuko Tanitame, Keizo Tanitame, Kazuo Awai
This article reviews the clinical utility of 3D magnetic resonance imaging (MRI) sequences optimized for the evaluation of various intraspinal lesions. First, intraspinal tumors with hypervascular components and arteriovenous malformations (AVM) are clearly shown on contrast-enhanced (CE)-3D T1-weighted gradient-echo (GE) sequences with high spatial resolution. Second, dynamic CE-3D time-resolved magnetic resonance angiography (MRA) shows delineated feeding arteries of intraspinal AVM or arteriovenous fistula (AVF), greatly aiding subsequent digital subtraction angiography (DSA)...
February 23, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28205100/efficacy-of-oral-supplemental-hydration-for-the-prevention-of-contrast-induced-nephropathy-in-rats
#19
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
#20
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
journal
journal
42190
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"