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Nabavizadeh S Ali SA Departments of Radiology (SAN), Pathology (MS), and Oncology (JBB), The Children's Hospital of Philadelphia, Philadelphia, - - 2014
: Optic nerve sheath meningioma is most often discovered in adults and is relatively rare in children. We report a 12-year-old girl with an atypical primary optic nerve meningioma, which demonstrated restricted diffusion on magnetic resonance imaging and high Ki67 labeling index. The patient developed recurrence, despite aggressive surgical resection ...
Kim Hye Ok HO From the *Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; †Department of Radiology, Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea; ‡Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, - - 2014
This study evaluated the usefulness of adding single-photon emission computed tomography (SPECT)/computed tomography (CT) (SPECT/CT) to technetium Tc 99m (Tc) hexamethylpropylene amine oxime (HMPAO)-labeled leukocyte imaging for diagnosing infections in hip or knee joint prostheses. The Tc-HMPAO-labeled leukocyte scans of 164 patients (71 with hip prostheses and 93 with knee ...
Han Yuchi Y Cardiovascular Division, Department of Medicine, Perelman School of Medicine, Hospital of the University of Pennsylvania, 9022 Gates, 3400 Spruce Street, Philadelphia, PA, - - 2014
There is great interest to use magnetic resonance imaging (MRI) for non-invasive assessment of myocardial disease in ischemic and non-ischemic cardiomyopathies. Recently, there has been a renewed interest to use a magnetic resonance imaging (MRI) technique utilizing spin locking radiofrequency (RF) pulses, called T1ρ MRI. The spin locking RF pulse ...
Glazebrook Katrina N KN Mayo Clinic, 200 First Street SW, Rochester, MN 55905, - - 2014
Aneurysmal bone cysts (ABC) are rare, benign, expansile lesions of bone often found in the metaphyses of long bones in pediatric and young adult population. Multiple fluid levels are typically seen on imaging with magnetic resonance imaging (MRI) or computed tomography (CT). We describe a case of a primary ABC ...
Qiu Zhi-Xin ZX Department of Respiratory Medicine, West China Hospital, Sichuan University Chengdu, - - 2014
Primary cardiac angiosarcoma is an extremely rare malignant tumor with various clinical presentations but usually in late stage. We report a case presented with bloody pericardial effusion, in which the final diagnosis was confirmed by multiple imaging modalities such as echocardiography, computed tomography, magnetic resonance imaging and fluorine-18-fluorodeoxyglucose positron emission ...
Beyazal Mehmet M Yüzüncü Yıl University, School of Medicine, Department of Radiology, Van, Turkey. Electronic address: - - 2013
Primary bladder angiosarcomas are extremely rare but aggressive tumors. Due to the small number of cases (less than 30) reported to date, the information about natural tumor progression, optimal treatment procedure and prognosis are limited. Also, published reports of bladder angiosarcoma have not adequately featured imaging findings. Herein we report ...
Ratanajanchai Montri - - 2014
Herein, we introduced amine-functionalized core-shell nanoparticles (Polymethyl methacrylate/Polyethyleneimine; PMMA/PEI) with surface primary amines (3.15×10(5) groups/particle) and uniform size distribution (150-200nm) that were prepared by one-step photo-induced emulsion polymerization. Further PEI-surface was modified with diethylenetriamine pentaacetic acid (DTPA) and introduced with Gd(III). The modified particles possessing DTPA can entrap a high ...
Bosemani Thangamadhan - - 2013
We present a complex case of dorsolumbosacral agenesis associated with a nonterminal myelocystocele and secondary tonsillar herniation. The secondary tonsillar herniation, mimicking a Chiari I malformation, was evident at postnatal life with concomitant enlargement of the myelocystocele. Prenatal and postnatal MRI proved invaluable in recognizing temporal change in the position ...
Jamin Yann - - 2013
The purpose of this study is to evaluate if the differential exchange rates with bulk water between amine and amide protons can be exploited using chemical exchange saturation transfer magnetic resonance (CEST-MR) to monitor the release of glutamate induced by carboxypeptidase G2 (CPG2), an enzyme utilized in cancer gene therapy. ...
O'Neill Ailbhe C - - 2013
Angiosarcomas are malignant tumours of endovascular origin. They are rare tumours accounting for 0.04-1% of all breast malignancies. Two different forms are described: primary, occurring in young women, and secondary angiosarcoma, which occurs in older women with a history of breast-conserving surgery and radiation therapy. Imaging findings on mammography and ...
He H - - 2013
To evaluate utility of magnetic resonance imaging (MRI) in determining the primary site of endometrial versus cervical tumours when the biopsy results are inconclusive. Forty-eight patients who underwent a total hysterectomy for unknown primary adenocarcinoma of the uterus after endometrial and/or endocervical biopsies were included in the study. The 48 ...
de Bakker E - - 2013
Objectives: To report the characteristics of two types of flexor enthesopathy, primary and concomitant, based on different diagnostic techniques. Materials and methods: Over a period of three years a prospective study was performed on dogs admitted for the complaint of elbow lameness. Based on the radiographic findings a selection of ...
Liu Hongrong - - 2013
In this work, we developed a novel and biocompatible dual-modal nanoprobe based on single-phase amine-functionalized BaYF5:Yb/Er nanoparticles (NPs) for upconversion (UC) fluorescence and in vivo computed X-ray tomography (CT) bioimaging for the first time. High-quality water-soluble amine-functionalized BaYF5:Yb/Er NPs with an average size of 24 nm were synthesized by a ...
Eller Michael - - 2013
Headaches are described as primary, where no contributing cause is found, or secondary, where a discrete lesion or other condition has triggered the phenotype. Primary headache is a common condition; migraine causes much of the morbidity in this population, at great personal and economic cost. The decision to use MRI ...
Cao Ying J YJ Department of Medicine, Division of Clinical Pharmacology, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, - - 2012
We sought to describe quantitatively the distribution of rectally administered gels and seminal fluid surrogates using novel concentration-distance parameters that could be repeated over time. These methods are needed to develop rationally rectal microbicides to target and prevent HIV infection. Eight subjects were dosed rectally with radiolabelled and gadolinium-labelled gels ...
Houlding Thomas K - - 2012
We present a simple method for direct and solvent-free formation of amides from carboxylic acids and amines using radiofrequency heating. The direct energy coupling of the AC magnetic field via nickel ferrite magnetic nanoparticles enables fast and controllable heating, as well as enabling facile work-up via magnetic separation.
John Sindhu - - 2012
Tablet computers such as the iPad, which have a large format, improved graphic display resolution and a touch screen interface, may have an advantage compared to existing mobile devices such as smartphones and laptops for viewing radiological images. We assessed their potential for emergency radiology teleconsultation by reviewing multi-image CT ...
De Smet Arthur A - - 2012
The goal of this article is to summarize the literature about the diagnosis of meniscal tears on MRI including the normal appearance of the meniscus and the appearance of the various types of meniscal tears. In addition, I discuss my experience with the causes of errors in the MR diagnosis ...
Prakash K N Bhanu - - 2012
An automatic, accurate and fast segmentation of hemorrhage in brain Computed Tomography (CT) images is necessary for quantification and treatment planning when assessing a large number of data sets. Though manual segmentation is accurate, it is time consuming and tedious. Semi-automatic methods need user interactions and might introduce variability in ...
Ruys A T - - 2012
To obtain diagnostic performance values of CT, MRI, ultrasound and 18-fludeoxyglucose positron emission tomography (PET)/CT for staging of hilar cholangiocarcinoma. A comprehensive systematic search was performed for articles published up to March 2011 that fulfilled the inclusion criteria. Study quality was assessed with the quality assessment of diagnostic accuracy studies ...
Sakuma A - - 2012
This study aimed to discriminate between enamel and composite resins by differences in Hounsfield units shown on 16 section multidetector CT (MDCT) images taken of unidentified bodies. First, we determined the Hounsfield units of composite resins in 15 extracted human teeth. We then filled a single cavity prepared in each ...
Bhosale P - - 2012
OBJECTIVES: To predict the primary neuroendocrine tumour of the gastrointestinal tract site based on observed metastatic sites. METHODS: We studied data from the radiology database of a single, large cancer centre on 250 patients with pathologically confirmed neuroendocrine tumours. Primary tumour sites and the locations of metastases were collected from ...
Scheidegger Olivier - - 2012
Several practical obstacles in data handling and evaluation complicate the use of quantitative localized magnetic resonance spectroscopy (qMRS) in clinical routine MR examinations. To overcome these obstacles, a clinically feasible MR pulse sequence protocol based on standard available MR pulse sequences for qMRS has been implemented along with newly added ...
Zhang Ming - - 2012
PURPOSE: To determine the accuracy of routine magnetic resonance imaging (MRI) in the grading of knee cartilage lesions through a meta-analysis. METHODS: A search of English-language literature published before February 2012 was carried out in PubMed. Articles using arthroscopy as a gold standard, a 6-knee region dividing method, and a ...
Böttcher Peter - - 2012
Low-field MRI (lfMRI) has become increasingly accepted as a method for diagnosing canine meniscal tears in clinical practice. However, observer effects on diagnostic accuracy have not been previously reported. In this study, 50 consecutive stifle joints with clinical and radiologic evidence of cranial cruciate ligament insufficiency were investigated by lfMRI ...
Antic Vojislav - - 2012
Protection at positron emission tomography-computed tomography (PET-CT) installations is the most complex problem in the field of designing structural protection from ionising radiation in medical practice. This paper provides a discussion on the values for shield widths obtained from two different estimation methods, as well as of certain theoretical differences ...
Araujo Paulo - - 2012
PURPOSE: Magnetic resonance imaging (MRI) is the most current diagnostic imaging procedure for suspected ACL injuries. It is an accurate, highly sensitive and specific tool for the diagnosis of ACL tears, graft tears and associated injuries. However, it can also be used for various other aspects of anatomic ACL reconstruction. ...
Lois Cristina - - 2012
PURPOSE: Clinical PET/MR acquisition protocols entail the use of MR contrast agents (MRCA) that could potentially affect PET quantification following MR-based attenuation correction (AC). We assessed the effect of oral and intravenous (IV) MRCA on PET quantification in PET/MR imaging. METHODS: We employed two MRCA: Lumirem® (oral) and Gadovist® (IV). ...
Lehnert Thomas - - 2012
Enlargement and dysfunction of the right ventricle (RV) is a sign and outcome predictor of many cardiopulmonary diseases. Due to the complex geometry of the RV exact volumetry is cumbersome and time-consuming. We evaluated the performance of prototype software for fully automated RV segmentation and volumetry from cardiac CT data. ...
Babazadeh Sina - - 2012
BACKGROUND: The mechanical alignment of the knee is an important factor in planning for, and subsequently assessing the success of a knee replacement. It is most commonly measured using a long-leg anteroposterior radiograph (LLR) encompassing the hip, knee and ankle. Other modalities of measuring alignment include computer tomography (CT) and ...
Gao Z - - 2012
Distinguishing pulmonary arterial and venous (A/V) trees via in vivo imaging is a critical first step in the quantification of vascular geometry for the purpose of diagnosing several pulmonary diseases and to develop new image-based phenotypes. A multi-scale topo-morphologic opening (MSTMO) algorithm has recently been developed in our laboratory for ...
van der Zwaal Peer - - 2012
PURPOSE: To determine the intraobserver and interobserver agreement on the geometric classification and 2-dimensional measurements of rotator cuff tears based on magnetic resonance arthrography. METHODS: We retrospectively reviewed preoperative magnetic resonance arthrograms of 73 consecutive patients who were surgically treated for their full-thickness rotator cuff tears. The images were blinded ...
Keereman Vincent V MEDISIP, Department of Electronics and Information Systems, Ghent University-IBBT-IBiTech, De Pintelaan 185, 9000 Ghent, Belgium. - - 2013
Quantitative PET imaging requires an attenuation map to correct for attenuation. In stand-alone PET or PET/CT, the attenuation map is usually derived from a transmission scan or CT image, respectively. In PET/MR, these methods will most likely not be used. Therefore, attenuation correction has long been regarded as one of ...
Schlorhaufer C - - 2012
PURPOSE: Due to the time factor in polytraumatized patients all relevant pathologies in a polytrauma computed tomography (CT) scan have to be read and communicated very quickly. During radiology residency acquisition of effective reading schemes based on typical polytrauma pathologies is very important. Thus, an online tutorial for the structured ...
Wu Lian-Ming - - 2012
BACKGROUND: To obtain diagnostic performance values of T2-weighted imaging (T2WI) and contrast-enhanced magnetic resonance imaging (CE-MRI) in the prediction of myometrial invasion in patients with endometrial cancer. METHODS: Databases including MEDLINE and EMBASE were searched for relevant original articles published from January1995 to March 2012. Pooled estimation data were obtained ...
Jung Joon-Yong - - 2012
OBJECTIVES: The aim of this study was to determine the accuracy and reliability of shoulder magnetic resonance (MR) arthrography with three-dimensional (3D) isotropic intermediate-weighted turbo spin-echo (TSE) sampling perfection with application-optimised contrasts using different flip angle evolution (SPACE) in the diagnosis of superior labrum anterior-to-posterior (SLAP) lesions compared with two-dimensional ...
Wang Jia J Department of Radiology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. - - 2012
To develop a dual-energy CT (DECT) method for differentiating uric acid (UA) from non-UA stones in the presence of iodinated contrast medium. Thirty UA and 45 non-UA stones were selected after infra-red spectroscopic analysis and independently placed in a 1.5-ml vial, which was filled first with saline and then with ...
Noshchenko Andriy - - 2012
ABSTRACT: Study Design. Biomechanic and radiographic studyObjective. Accurate assessment of vertebrae stiffness and strength at discrete sites in-vivo is important for surgical treatment.Summary of Background Data. We have not found published methods which allow in-vivo evaluation of bone mechanical properties at discrete sites of vertebral body applicable for clinical use.We ...
Bungert Andreas - - 2012
The concurrent application of TMS and MRI is challenging due to the MR-image artifacts, which are produced by using the two techniques in combination. One such artifact arises from the introduction of radio frequency noise through the lead of the TMS-coil into the scanner. Here we describe four methods used ...
Quint Leslie E LE Department of Radiology, University of Michigan Health System, Ann Arbor, MI 48109, USA. - - 2013
To determine the variability in CT measurements of proximal thoracic aortic diameters obtained using double-oblique short axis and semiautomatic centerline analysis techniques. Institutional review board approval, with waiver of informed consent, was obtained for this HIPAA-compliant, retrospective study. Cardiac gated thoracic aortic CT scans were evaluated in 25 patients. Maximum ...
Otake Y Y Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD 21205, - - 2012
Surgical targeting of the incorrect vertebral level (wrong-level surgery) is among the more common wrong-site surgical errors, attributed primarily to the lack of uniquely identifiable radiographic landmarks in the mid-thoracic spine. The conventional localization method involves manual counting of vertebral bodies under fluoroscopy, is prone to human error and carries ...
Gonen Tansu - - 2012
To compare the keratometric values measured by the automated keratometer, two Placido-based computerized topography systems (Dicon CT 200 [Vismed Inc] and Allegro Topolyzer [WaveLight Inc]), and Scheimpflug analysis (Pentacam [Oculus Optikgeräte GmbH]). The keratometric data of 200 eyes from 200 patients evaluated for refractive surgery were reviewed retrospectively. Mean simulated ...
Raupach Rainer - - 2012
Purpose: To evaluate the maximum performance gain that can theoretically be achieved with differential phase contrast computed tomography (PCT) compared with absorption-based CT, applied to in vivo medical imaging.Methods: We develop a mathematical framework for analyzing the performance of PCT relative to CT under ideal conditions. We validate our model ...
Wang Chunliang - - 2012
BackgroundThanks to the development of computed tomography (CT) scanners and computer software, accurate coronary artery segmentation can be achieved with minimum user interaction. However, the question remains whether we can use these segmented images for reliable diagnosis.PurposeTo retrospectively evaluate the diagnostic accuracy of coronary CT angiography (CCTA) using segmented 3D ...
Sakamoto Junichiro - - 2012
The purposes of this retrospective study were to compare various methods of apparent diffusion coefficient (ADC) measurement for head and neck lesions in half-Fourier single-shot turbo spin-echo (HASTE) diffusion-weighted imaging (DWI) and determine the threshold ADC value for predicting malignancy. HASTE DW images of 46 lesions (10 cysts, 14 benign ...
Ding Kai - - 2012
Regional lung volume change as a function of lung inflation serves as an index of parenchymal and airway status as well as an index of regional ventilation and can be used to detect pathologic changes over time. In this paper, the authors propose a new regional measure of lung mechanics-the ...
Cunliffe Alexandra R - - 2012
The aim of this study was to quantify the effect of four image registration methods on lung texture features extracted from serial computed tomography (CT) scans obtained from healthy human subjects. Two chest CT scans acquired at different time points were collected retrospectively for each of 27 patients. Following automated ...
Chen Jeon-Hor - - 2012
To compare the breast volume (BV), fibroglandular tissue volume (FV), and percent density (PD) measured from breast MRI of the same women using four different MR scanners. The study was performed in 34 healthy Asian volunteers using two 1.5T (GE and Siemens) and two 3T (GE and Philips) MR scanners. ...
Yang Jinzhong - - 2012
To develop a method for creating variable planning margins around a clinical treatment volume (CTV) and to evaluate its application in head and neck cancer radiotherapy in accounting for locoregional variations of nonrigid setup uncertainties. Ten computed tomography (CT) images (with a resolution of 0.68 × 0.68 × 2.5 mm(3)) ...
Price Malcolm J MJ School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom. - - 2012
To estimate the proportion of tubal factor infertility (TFI) caused by Chlamydia trachomatis (CT), the etiologic fraction, from a retrospective study of CT antibody prevalence in TFI cases and controls, adjusted for sensitivity and specificity. We use published data on sensitivity and specificity to estimate the performance of assays in ...
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