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Japanese Journal of Radiology

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https://www.readbyqxmd.com/read/28795277/mr-imaging-findings-of-vertebral-involvement-in-gorham-stout-disease-generalized-lymphatic-anomaly-and-kaposiform-lymphangiomatosis
#1
Hiroki Kato, Michio Ozeki, Toshiyuki Fukao, Masayuki Matsuo
PURPOSE: To assess the MR imaging findings of vertebral involvement in Gorham-Stout disease (GSD), generalized lymphatic anomaly (GLA), and kaposiform lymphangiomatosis (KLA). METHODS: Nine patients (three patients with GSD, three with GLA, and three with KLA) who underwent whole-spine MR examinations were included. MR findings of fatty marrow replacement and prolonged T1 and T2 lesions of the vertebrae were retrospectively assessed. Prolonged T1 and T2 lesions were defined as well-defined and round-, oval-, or geographic-shaped areas...
August 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28795273/capacity-of-gold-nanoparticles-in-cancer-radiotherapy
#2
REVIEW
Nadeem M S Nagi, Yasir A M Khair, Ahmed M E Abdalla
Radiotherapy is the ionizing radiation used for treatment of cancer and other diseases. Although radiotherapy is the major treatment for cancer, a lot of patients do not undergo radiation due to associated risks such as radiation pneumonitis, cardiovascular complications, development of secondary tumor, and lymphedema. However, the advantages of nanotechnology provide a unique potential to enhance radiotherapeutic performance, in particular by utilizing gold nanoparticles (Au NPs). In this review, we briefly describe the current direction of research towards the use of Au NPs for radiotherapeutic enhancement, combination, monitoring and in side effect reductions...
August 9, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28779454/single-center-experience-with-intralesional-bleomycin-sclerotherapy-for-lymphatic-malformations
#3
Hakan Yılmaz, Özlem Yılmaz, İlkay Çamlıdağ, Ümit Belet, Hüseyin Akan
PURPOSE: The purpose of our study was to evaluate the efficacy of percutaneous sclerotherapy using bleomycin in treatment of lymphatic malformations. METHODS: Between January 2009 and January 2013, ten patients with lymphatic malformations who were admitted to the interventional radiology department were included in this retrospective study. Intralesional bleomycin was administered by percutaneous injection through 21-23 Gauge needles with a dose of 1 mg/kg body weight...
August 4, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28755157/renal-dysfunction-after-abdominal-or-thoracic-endovascular-aortic-aneurysm-repair-incidence-and-risk-factors
#4
Shuji Ikeda, Makiyo Hagihara, Akira Kitagawa, Yuichiro Izumi, Kojiro Suzuki, Toyohiro Ota, Tsuneo Ishiguchi, Hiroyuki Ishibashi
PURPOSE: To determine the incidence and risk factors of renal dysfunction after abdominal endovascular aortic repair (EVAR) and thoracic endovascular aortic repair (TEVAR). MATERIALS AND METHODS: The study consisted of 227 patients treated with EVAR and 90 with TEVAR for aortic aneurysms. Parameters, including patients' background factors, preoperative renal function, contrast dose and aortic wall irregularity on CT images were assessed in relation to postoperative renal dysfunction...
July 28, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28748504/whole-brain-analyses-of-age-related-microstructural-changes-quantified-using-different-diffusional-magnetic-resonance-imaging-methods
#5
Miho Ota, Noriko Sato, Norihide Maikusa, Daichi Sone, Hiroshi Matsuda, Hiroshi Kunugi
PURPOSE: The new diffusional magnetic resonance imaging (dMRI) techniques, diffusional kurtosis imaging (DKI) and neurite orientation dispersion and density imaging (NODDI) have been developed to clarify the microstructural changes. To our knowledge, however, there is little information on the similarities and differences of these metrics evaluated by the image-by-image paired t test. MATERIALS AND METHODS: Twenty-three healthy subjects underwent dMRI. We estimated the relationships of these metrics evaluated by the image-by-image paired t-test and compared aging effects on each metric...
July 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28748503/role-of-18-f-fdg-pet-ct-in-patients-affected-by-langerhans-cell-histiocytosis
#6
Domenico Albano, Giovanni Bosio, Raffaele Giubbini, Francesco Bertagna
PURPOSE: Langerhans cell histiocytosis (LCH) is a rare hematological disorder for which the utility of(18)F-FDG PET/CT is unclear. Our aim was to explore the metabolic features of LCH and the possible role of(18)F-FDG PET/CT in LCH evaluation. MATERIALS AND METHODS: We found 17 patients with histologically proven LCH who underwent 17(18)F-FDG PET/CT scans for staging and 42 scans for restaging/follow-up purposes. PET/CT results were compared with those obtained from other conventional imaging modalities (bone scintigraphy, plain radiogram, computed tomography, magnetic resonance)...
July 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28730468/methods-for-optimizing-the-display-conditions-of-brain-magnetic-resonance-images
#7
Toshimasa Hara, Yusuke Inoue, Ryutaro Ukisu, Hirofumi Hata
PURPOSE: To investigate a method for optimizing the display conditions of brain magnetic resonance (MR) images. MATERIALS AND METHODS: We retrospectively analyzed brain MR images of 120 adults classified into screening, acute cerebral infarction, and brain tumor groups (n = 40 each). Two observers independently displayed the images on a monitor and optimized the display conditions using the W/L and U/L methods. In the W/L method, the observers manipulated the width and level of the display window, while in the U/L method they manipulated the upper and lower levels of the window...
July 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28730467/organ-retention-of-gadolinium-in-mother-and-pup-mice-effect-of-pregnancy-and-type-of-gadolinium-based-contrast-agents
#8
Khongorzul Erdene, Takahito Nakajima, Satomi Kameo, Miski Aghnia Khairinisa, Oyunbold Lamid-Ochir, Amartuvshin Tumenjargal, Noriyuki Koibuchi, Hiroshi Koyama, Yoshito Tsushima
PURPOSE: To investigate the effect of pregnancy and type of gadolinium (Gd)-based contrast agents (GBCAs) on organ retention of Gd in mother and pup mice after maternal administration. MATERIALS AND METHODS: Gd-DTPA-BMA (gadodiamide) or Gd-DOTA (gadoterate dimeglumine) was administered (2.0 mmol/kg of maternal weight) four times to pregnant Balb/c mice from gestational day 16-19, respectively. At 28 days after birth, they were euthanized and their organs (blood, brain, liver, kidney, spleen, and bone) were removed for the measurement of Gd by inductively coupled plasma mass spectrometry...
July 20, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28702886/comparison-of-transvaginal-sonography-and-computed-tomography-colonography-with-contrast-media-and-urographic-phase-for-diagnosing-deep-infiltrating-endometriosis-of-the-posterior-compartment-of-the-pelvis-a-pilot-study
#9
Letizia Zannoni, Simona Del Forno, Francesca Coppola, Dimitris Papadopoulos, Domenico Valerio, Rita Golfieri, Giacomo Caprara, Roberto Paradisi, Renato Seracchioli
PURPOSE: To compare the diagnostic accuracy of transvaginal sonography (TVS) and computed tomography-colonography with contrast media and urographic phase (CTCU) in the preoperative detection of deep infiltrating endometriosis (DIE). MATERIALS AND METHODS: Forty-seven patients with clinical suspicion of DIE underwent preoperative TVS and CTCU. Imaging data were compared with histopathologic analysis. Sensitivity, specificity, positive and negative predictive values and test accuracies of the two modalities were calculated...
July 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28674772/detection-of-unexpected-emergency-diseases-using-fdg-pet-ct-in-oncology-patients
#10
Akira Toriihara, Emi Yamaga, Masashi Nakadate, Jun Oyama, Ukihide Tateishi
PURPOSE: To evaluate the frequency of emergency diseases that were detected unexpectedly using FDG-PET/CT. MATERIALS AND METHODS: Interpretation reports for 11,663 FDG-PET/CT studies in our hospital were retrospectively reviewed. Patients with major emergency diseases were extracted according to the following exclusion criteria: (1) relevant findings had been recognized prior to the PET/CT; (2) an intervention or operation that may have been relevant to the present findings was performed within 1 month prior to the PET/CT; and (3) the clinical course could not be investigated sufficiently (e...
July 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28653228/enlargement-of-the-infraorbital-canal-following-caldwell-luc-surgery
#11
Hideyuki Fukui, Nobuo Kashiwagi, Takamichi Murakami, Yoshiyuki Watanabe, Tomoko Hyodo, Kazunari Ishi, Miho Yamakawa, Hirito Takahashi, Noriyuki Tomiyama
OBJECTIVES: The infraorbital canal (IOC), which runs in the roof of the maxillary sinus, is a useful anatomical landmark for the infraorbital nerve (ION) on computed tomography (CT) images. Enlargement of the IOC on CT images is thought to be a pathological state that usually affects the ION. However, we have frequently observed enlargement of the IOC in patients with a history of radical surgery of the maxillary sinus: so-called Caldwell-Luc (CL) surgery. In this study, the size of the IOC of the maxillary sinus was compared between patients with a history of CL surgery (post-CL IOCs) and those with no history of CL surgery (control IOCs)...
June 26, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28647834/influence-of-multi-leaf-collimator-leaf-transmission-on-head-and-neck-intensity-modulated-radiation-therapy-and-volumetric-modulated-arc-therapy-planning
#12
Motoharu Sasaki, Masahide Tominaga, Takeshi Kamomae, Hitoshi Ikushima, Motonori Kitaoka, Ryota Bando, Kanako Sakuragawa, Masataka Oita
The aim of this study was to quantify the effect of multi-leaf collimators (MLCs) with different leaf widths on the planning of intensity-modulated radiation therapy (IMRT) and volumetric-modulated arc therapy (VMAT). Toward this objective, dose transmission through a high-definition 120-leaf MLC (HD120MLC) and 120-leaf Millennium MLC (M120MLC) was investigated, using it with a test case and clinical case studies. In test case, studies with IMRT and VMAT plans, the difference in MLC leaf width had a limited effect on planning target volumes (PTVs)...
June 24, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28647833/the-evaluation-of-the-right-inferior-phrenic-artery-diameter-in-cirrhotic-patients
#13
Kaan Esen, Yuksel Balci, Sermin Tok, Enver Ucbilek, Engin Kara, Omer Kaya
PURPOSE: The purpose of this study is to evaluate the relationship between right inferior phrenic artery diameter and portal hypertension in cirrhotic patients. METHODS: CT examinations of 38 patients with chronic liver disease (patient group) and 40 patients without any liver disease (control group) were evaluated. The right inferior phrenic artery diameter of the patient and control group were measured. CT findings of portal hypertension, which were accepted as ascites, collaterals, splenomegaly and portal vein diameter greater than 13 mm, were determined and scored in the patient group...
June 24, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28620714/the-outcome-of-i-131-ablation-therapy-for-intermediate-and-high-risk-differentiated-thyroid-cancer-using-a-strict-definition-of-successful-ablation
#14
Ken Watanabe, Mayuki Uchiyama, Kunihiko Fukuda
PURPOSE: This article examines the outcome of radioactive iodine ablation therapy for thyroid cancer in high-risk patients and investigates background factors influencing ablation failure. MATERIALS AND METHODS: We included 91 patients in this retrospective analysis and evaluated the ablation success rate. Successful ablation was defined as the absence of visible iodine-131 (I-131) accumulation in the thyroid bed after whole-body scans and thyroglobulin levels <2 ng/ml in a TSH-stimulated state after ablation...
June 15, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28608003/transarterial-chemoembolization-for-management-of-hemoptysis-initial-experience-in-advanced-primary-lung-cancer-patients
#15
Akihiko Seki, Chigusa Shimono
PURPOSE: To evaluate the hemostatic effects of transarterial infusion chemotherapy in addition to embolization (chemoembolization) for advanced primary lung cancer with tumor-related hemoptysis. MATERIALS AND METHODS: Ten consecutive patients with stage IIIB/IV or recurrent primary lung cancer (squamous cell carcinoma in six, adenocarcinoma in four) who underwent chemoembolization for control of hemoptysis were enrolled. At enrollment, five patients were considered refractory and five had contraindications to standard therapies...
June 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28608002/value-of-ultrasonographic-evaluation-for-soft-tissue-lesions-focus-on-incidentally-detected-lesions-on-ct-mri
#16
REVIEW
Sung Bin Park, Byeong Seong Kang
Soft-tissue lesions of the musculoskeletal system are commonly encountered in clinical practice and often manifest as palpable lesions. Moreover, the increasing use of cross-sectional imaging such as CT or MRI has resulted in the incidental detection of many soft-tissue lesions. Ultrasonography remains the primary imaging investigation for soft-tissue lesions. It has been shown to be helpful in depicting processes involving the soft-tissue lesions on cross-sectional imaging. This article describes the ultrasonographic findings of the most frequently incidentally detected benign and malignant soft-tissue lesions on cross-sectional imaging and suggests the characteristics of such diseases, focusing on the ultrasonographic features that allow accurate diagnosis...
June 12, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28639211/selective-venous-sampling-for-primary-hyperparathyroidism-how-to-perform-an-examination-and-interpret-the-results-with-reference-to-thyroid-vein-anatomy
#17
REVIEW
Takayuki Yamada, Masaya Ikuno, Yasumoto Shinjo, Atsushi Hiroishi, Shoichiro Matsushita, Tsuyoshi Morimoto, Reiko Kumano, Kunihiro Yagihashi, Takuyuki Katabami
Primary hyperparathyroidism (pHPT) causes hypercalcemia. The treatment for pHPT is surgical dissection of the hyperfunctioning parathyroid gland. Lower rates of hypocalcemia and recurrent laryngeal nerve injury imply that minimally invasive parathyroidectomy (MIP) is safer than bilateral neck resection. Current trends in MIP use can be inferred only by reference to preoperative localization studies. Noninvasive imaging studies (typically preoperative localization studies) show good detection rates of hyperfunctioning glands; however, there have also been cases of nonlocalization or discordant results...
August 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28612288/magnetic-resonance-image-guidance-in-external-beam-radiation-therapy-planning-and-delivery
#18
REVIEW
Ilamurugu Arivarasan, Chandrasekaran Anuradha, Shanmuga Subramanian, Ayyalusamy Anantharaman, Velayudham Ramasubramanian
The use of magnetic resonance (MR) imaging in radiation oncology is improving dramatically. This review article discusses the necessity of image guidance and how MR finds a significant place in radiotherapy planning and delivery. The challenges to and current solutions for an in-house MR simulation, dedicated MR simulator, estimation of electron density using MR image sets and development of MR-compatible treatment planning systems are presented. This article also reviews the feasibility, advantages and limitations of MR image-guided radiation therapy (MR-IGRT) and its drive toward the integration of radiation beams with MR technology...
August 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28589507/biliary-stone-removal-through-the-percutaneous-transhepatic-biliary-drainage-route-focusing-on-the-balloon-sphincteroplasty-flushing-technique-a-single-center-study-with-916-patients
#19
Jong Soo Shin, Hyung Jin Shim, Byung Kook Kwak, Hyun-Ki Yoon
PURPOSE: To present our experience in biliary stone removal (BSR) through the percutaneous transhepatic biliary drainage (PTBD) route in 916 patients, and discuss its clinical usefulness. MATERIALS AND METHODS: From 2001 to 2015, 916 patients (479 male patients and 437 female patients; age range, 22-92 years; mean age, 67 years) with 52 recurring cases, so a total of 968 cases, were enrolled in this study and retrospectively reviewed. PTBD was performed in all patients...
August 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/28584958/a-predictive-diagnostic-model-using-multiparametric-mri-for-differentiating-uterine-carcinosarcoma-from-carcinoma-of-the-uterine-corpus
#20
Yuki Kamishima, Mitsuru Takeuchi, Tatsuya Kawai, Takatsune Kawaguchi, Ken Yamaguchi, Naoki Takahashi, Masato Ito, Toshinao Arakawa, Akiko Yamamoto, Kazushi Suzuki, Masaki Ogawa, Moe Takeuchi, Yuta Shibamoto
PURPOSE: To construct a diagnostic model for differentiating carcinosarcoma from carcinoma of the uterus. MATERIALS AND METHODS: Twenty-six patients with carcinosarcomas and 26 with uterine corpus carcinomas constituted a derivation cohort. The following nine MRI features of the tumors were evaluated: inhomogeneity, predominant signal intensity, presence of hyper- and hypointense areas, conspicuity of tumor margin, cervical canal extension on T2WI, presence of hyperintense areas on T1WI, contrast defect area volume percentage, and degree of enhancement...
August 2017: Japanese Journal of Radiology
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