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Song Junfeng - - 2014
We proposed a microring resonator (MRR) enhanced photodetector (PD) structure. Resonance wavelength enhanced by the MRR amplifies the PD response. At L-band wavelengths, responsivity was doubled for an ultra-short germanium PD of 4 µm employing the MRR structure. Data rates of up to 40 Gb/s were also demonstrated at 1600 ...
Stelmach Dainna D Department of Veterinary Biosciences and Diagnostic Imaging (Stelmach, Sharma) and Department of Small Animal Medicine and Surgery (Rosselli, Schmiedt), College of Veterinary Medicine, University of Georgia, 501 DW Brooks Drive, Athens, Georgia 30602, - - 2014
Computed tomography (CT) of a dog with a cervical concentric wound and ventral chronic draining tract revealed a hyper-attenuating, concentric foreign body and contrast-enhancing tract. This is the first descriptive report of rubber band syndrome in a dog and CT characteristics of a subcutaneous rubber band foreign body.
Liu Yongkang Y Department of Radiology, Affiliated Hospital of Nanjing University of Traditional Chinese Medicine, Nanjing, Jiansu 210029, P.R. - - 2014
Neurilemmoma, also known as schwannoma, is an uncommon benign neoplasm that is most commonly found in the trunk and head and neck regions. The present study reports the case of a 67-year-old female with schwannoma localized in the anterior abdominal wall and analyzes the ultrasound and computed tomography (CT) imaging ...
Aydıngöz Ustün U Department of Radiology, Hacettepe University School of Medicine, Ankara, Turkey. - - 2014
ABduction and External Rotation (ABER) sequence in magnetic resonance (MR) arthrography of the shoulder is particularly important to better depict abnormal conditions of some glenohumeral joint structures and surrounding tissues by making imaging possible under a stress position relevant to pathologic conditions. Among the structures and tissues better depicted in ...
Li Chuanming - - 2014
Neoplastic and bland portal vein thrombi (PVT) are both common in patients with hepatocellular carcinoma (HCC). The correct discrimination of them is essential for therapeutic strategies planning and survival predicting. The current study aims to investigate the value of susceptibility-weighted imaging (SWI) in differentiating bland from neoplastic PVT in HCC ...
Emblem Kyrre E KE The Intervention Centre, Oslo University Hospital, Sognsvannsveien 20, 0372 Oslo, - - 2014
Our understanding of the importance of blood vessels and angiogenesis in cancer has increased considerably over the past decades, and the assessment of tumour vessel calibre and structure has become increasingly important for in vivo monitoring of therapeutic response. The preferred method for in vivo imaging of most solid cancers ...
Kim Tae Youn TY Betty Irene Moore School Nursing, University of California Davis , Sacramento, CA , - - 2014
Objectives: The purpose of this study was to examine the feasibility of automating lexical cross-mapping of a logic-based nursing terminology (ICNP) to SNOMED CT using the Unified Medical Language System (UMLS) maintained by the U.S. National Library of Medicine. Methods: A two-stage approach included patterns identification, and application and evaluation ...
Kim Seung Ho SH Department of Radiology, Inje University College of Medicine, Haeundae Paik Hospital, Busan, Republic of Korea - - 2014
As there is increased concern over the radiation exposure particularly in adolescents and young adults, computed tomography (CT) dose reduction is needed in the diagnosis of acute appendicitis. To evaluate the optimal strength of sinogram affirmed iterative reconstruction (SAFIRE) to obtain the best image quality on a 30-mAs applied low-dose ...
Nielsen Karin - - 2014
Thermal ablation of colorectal liver metastases (CRLM) may result in local progression, which generally appear within a year of treatment. As the timely diagnosis of this progression allows potentially curative local treatment, an optimal follow-up imaging strategy is essential. PET-MRI is a one potential imaging modality, combining the advantages of ...
Tisserand M M Centre de psychiatrie et neurosciences, Inserm S894, université Paris Descartes, Sorbonne Paris Cité, neuroimagerie, Sainte-Anne hospital, 1, rue Cabanis, 75014 Paris, - - 2014
Because of its excellent sensitivity and specificity to diagnose arterial ischemic stroke (AIS) in the acute phase, MRI answers the main questions to guide treatment in "candidates" for thrombolysis. It lasts less than ten minutes, can confirm the diagnosis of AIS and distinguish it from hematomas and other "stroke mimics". ...
Scialpi Michele M Division of Radiology 2, Department of Surgical and Biomedical Sciences, S. Maria della Misericordia Hospital, Perugia University, Perugia, Italy - - 2014
To assess the diagnostic accuracy and radiation dose of split-bolus multidetector-row computed tomography (MDCT) protocol in the detection and characterization of focal liver lesions in oncologic patients. We retrospectively analyzed triphasic CT at initial diagnosis and follow-up split-bolus 64-detector row CT protocol in 48 oncologic patients with focal liver lesions. ...
Arunachalam Arjun A Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, - - 2014
A method for preserving acquisition SNR through simultaneous acquisitions of distinct k-space phase encodes to enhance the performance of accelerated MRI is presented. An excitation module comprising RF pulses and gradients is inserted into a sequence of choice to overlap and acquire distinct k-space phase encodes. This accelerates a scan ...
Kawaguchi Tomohiro T Department of Neurosurgery, Kohnan Hospital, Sendai, Miyagi, - - 2014
Nonobstructive hydrocephalus in craniopharyngioma patients is rare, and the etiology is not known. We report two cases of patients with craniopharyngioma who presented with nonobstructive hydrocephalus. Repeated subarachnoidal hemorrhage (SAH) was considered as the underlying mechanism of hydrocephalus development. The first case was a 67-year-old woman presenting with deteriorated consciousness. ...
Nabavizadeh Seyed Ali SA Department of Radiology, University of Pennsylvania, Philadelphia, PA, - - 2014
The objectives of the study are to investigate the application of susceptibility-weighted imaging (SWI) and arterial spin labeling (ASL) imaging in the assessment of shunting and the draining veins in pediatric patients with arteriovenous shunting and compare the utility of SWI and ASL with conventional MR and digital subtraction angiography ...
Ezhapilli Sajeev R SR Department of Radiology & Imaging Sciences, Emory University School of Medicine, Atlanta, Georgia, - - 2014
Magnetic resonance imaging (MRI) is an outstanding tool for the identification and characterization of mesenteric masses. Mesenteric masses may be solid or cystic. Most solid mesenteric masses are neoplastic, with sclerosing mesenteritis a notable exception. Entirely cystic mesenteric masses are typically benign. The excellent soft-tissue contrast afforded by MRI aids ...
Jiang Xuyuan X Department of Radiology, The First Affiliated Hospital of China Medical University, Shenyang, - - 2014
To apply 3D multifrequency MR elastography (3DMMRE) to the uterus and analyse the viscoelasticity of the uterine tissue in healthy volunteers considering individual variations and variations over the menstrual cycle. Sixteen healthy volunteers participated in the study, one of whom was examined 12 times over two menstrual cycles. Pelvic 3DMMRE ...
Mendigaña Ramos M M Unidad de Neurorradiología, Complejo Hospitalario de Navarra, Pamplona, Navarra, España. Electronic address: - - 2014
Advances in imaging studies for acute ischemic stroke are largely due to the development of new efficacious treatments carried out in the acute phase. Together with computed tomography (CT) perfusion studies, CT angiography facilitates the selection of patients who are likely to benefit from appropriate early treatment. CT angiography plays ...
Wichmann Julian L JL Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Theodor-Stern-Kai 7, 60590, Frankfurt am Main, Germany, - - 2014
To intra-individually compare single-portal-phase low-tube-voltage (100-kVp) computed tomography (CT) with 120-kVp images for short-term follow-up assessment of CT severity index (CTSI) of acute pancreatitis, interobserver agreement and radiation dose. We retrospectively analysed 66 patients with acute pancreatitis who underwent initial dual-contrast-phase CT (unenhanced, arterial, portal phase) at admission and short-term ...
Higaki Atsushi A Department of Radiology, Kawasaki Medical School, 577 Matsushima, Kurashiki City, Okayama, 701-0192, Japan, - - 2014
To evaluate the prognosis of "strict" high-risk nodules (small hepatocellular nodules detected only in the hepatobiliary phase of initial Gd-EOB-DTPA-enhanced MR examination) in patients with cirrhosis or chronic hepatitis. The study included thirty-three patients with 60 "strict" high-risk nodules showing hypointensity at the hepatobiliary phase that was undetectable at the ...
Legrand Laurence L Radiology Department, Fondation Hôpital Saint-Joseph, 185 rue Raymond Losserand, 75014, Paris, France, - - 2014
To identify the MRI sequences producing the greatest pancreatic adenocarcinoma conspicuity and to assess correlations linking MRI signal intensity and apparent diffusion coefficient to histopathological findings. We retrospectively included 22 patients with pancreatic adenocarcinoma who underwent MRI (1.5 or 3 T) before surgical resection. Fat-suppressed (FS) T1- and T2-weighted sequences; 3D ...
Nishie Akihiro A Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, - - 2014
The relationship between the washout pattern and constituent cell in adrenal hyperplasia (AH) has not been fully investigated. The purpose of this study was to elucidate the radiological or pathological factors determining the washout pattern of AH on dynamic CT. Ten patients with 14 surgically proven AHs were enrolled. Dynamic ...
Kim Sung Jung SJ Department of Radiology, Ajou University School of Medicine, Suwon, Republic of - - 2014
To investigate the prevalence of simple pulmonary eosinophilia (SPE) and validate CT findings of SPE found on follow-up CT of oncologic patients. We retrospectively reviewed 6977 cases of oncologic patients who underwent chest CT. A total of 66 individuals who met criteria for having SPE were identified. CT scans were ...
Ginat Daniel Thomas DT Department of Radiology, University of Chicago, Chicago, Illinois - - 2014
Computed tomography (CT) is an essential tool in diagnostic imaging for evaluating many clinical conditions. In recent years, there have been several notable advances in CT technology that already have had or are expected to have a significant clinical impact, including extreme multidetector CT, iterative reconstruction algorithms, dual-energy CT, cone-beam ...
Haughton V V From the Department of Radiology (V.H.), University of Wisconsin, Madison, Wisconsin; and Center for Biological Computing (K.-A.M.), Simula, Lysaker, Norway. - - 2014
Flow imaging with cardiac-gated phase-contrast MR has applications in the management of neurologic disorders. Together with computational fluid dynamics, phase-contrast MR has advanced our understanding of spinal CSF flow. Phase-contrast MR is used to evaluate patients with Chiari I malformation who are candidates for surgical treatment. In theory, abnormal CSF ...
Botsikas Diomidis D Geneva University Hospital, Department of Imaging and Medical Information Sciences, Division of Radiology, Rue Gabrielle-Perret-Gentil 4, 1211 Genève 4, Switzerland. Electronic address: - - 2014
To determine whether post-processing of the data from portal-phase enhanced dual-energy CT (DECT), with or without the addition of a late enhanced phase acquisition, may enable characterization of adrenal lesions without the need for acquisition of pre-contrast images. Twenty-two patients with 24 adrenal lesions underwent unenhanced, venous and delayed phase ...
Schalkx Hanke J HJ Department of Radiology, University Medical Center Utrecht, PO Box 58800, 3584 CX, Utrecht, The Netherlands, - - 2014
Within-patient comparison of the enhancement patterns of normal liver parenchyma after gadobutrol and gadoxetate disodium, with emphasis on the start of hepatocytic uptake of gadoxetate disodium. Twenty-one patients (12 female, 9 male) without chronic liver disease underwent 1.5-T contrast-enhanced MRI twice, once with an extracellular contrast agent (gadobutrol) and once ...
Buffa Vitaliano V UOC Radiologia Cardiovascolare e d'Urgenza, AO San Camillo Forlanini, Rome, Italy, - - 2014
This study was done to evaluate the possibility of reducing the dose of ionising radiation by using dual-source dual-energy computed tomography (CT) in patients undergoing CT angiography of the aorta to search for endoleaks after endovascular aneurysm repair (EVAR). One hundred and forty-eight patients (117 M, 31 F; mean age 75 ± 6.5) underwent ...
Ayache Jad Bou JB Department of Radiology, Northwestern University, 737 North Michigan Avenue, Suite 1600, Chicago, IL 60611, - - 2014
Magnetic resonance (MR) angiographic techniques optimize the visualization of the vasculature at MR imaging. MR angiography has several advantages over Doppler ultrsonography and computed tomographic angiography, with adaptable protocols to answer specific clinical questions. Novel noncontrast MR angiographic techniques now enable assessment of the abdominopelvic vasculature without administration of gadolinium-based ...
Davarpanah Amir H AH Department of Radiology, Yale-New Haven Hospital, 20 York Street, New Haven, CT 06510, USA. Electronic address: - - 2014
MR imaging has proven to be a versatile modality in evaluation of the kidneys, collecting system, and adrenal glands. By performing a comprehensive MR examination, it is not only possible to accurately characterize cystic and solid lesions of the kidneys, as well as urothelial masses, but also to provide important ...
Choudhri Tanvir F TF Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, New - - 2014
The ability to identify a successful arthrodesis is an essential element in the management of patients undergoing lumbar fusion procedures. The hypothetical gold standard of intraoperative exploration to identify, under direct observation, a solid arthrodesis is an impractical alternative. Therefore, radiographic assessment remains the most viable instrument to evaluate for ...
Ehman Eric C EC From the Departments of Radiology (E.C.E., L.Y., A.M., M.M.S., D.J., M.R.B., C.H.M., D.M.H., J.G.F.) and Biomedical Engineering (D.S.L., D.J.B.), Mayo Clinic, 200 First St SW, Rochester, MN 55905; and Department of Radiology, Mayo Clinic, Scottsdale, Ariz (A.K.H., - - 2014
Most noise reduction methods involve nonlinear processes, and objective evaluation of image quality can be challenging, since image noise cannot be fully characterized on the sole basis of the noise level at computed tomography (CT). Noise spatial correlation (or noise texture) is closely related to the detection and characterization of ...
- - 2014
[This corrects the article on p. 651 in vol. 55, PMID: 24719131.].
Wang Ruizhi R Shanghai Institute of Medical Imaging (RW, XW); Department of Interventional Radiology (RW, XW), Zhongshan Hospital, Fudan University; Department of Radiology (RW, SZ), Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine; Department of Obstetrics and Gynecology (YY), Shanghai First Maternity and Infant Hospital; Department of Radiology (LS, WS); Department of Urology (XS), Shanghai Seventh People's Hospital, Shanghai, - - 2014
This article aims to explore the characteristics of computed tomography (CT) images of ovarian vein syndrome (OVS). The approval of the research ethics committee and the written informed consent of the patients were obtained. The CT images of 11 patients who had been diagnosed with OVS were retrospectively analyzed. All ...
Hao Sun S Department of Radiology,PUMC Hospital,CAMS and PUMC,Beijing - - 2014
Objective To assess the upper urinary tract opacification and the diagnostic performance of one-bolus dual-source dual-energy CT urography(CTU)for painless hematuria. Methods Totally 205 patients who underwent dual-source dual-energy CTU for painless hematuria were enrolled in this study. CTU included true non-enhanced phase,dual-energy mode nephrographic phase,and FLASH mode excretory phase imaging ...
Stelter Lars L Klinik für Radiologie, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353 Berlin, Germany. Electronic address: - - 2014
To estimate the additional value of an increased flip angle of 35° in late phase Gd-EOB-DTPA-enhanced magnetic resonance cholangiography, as compared to T2w-MRCP. 40 adult patients underwent Gd-EOB-DTPA enhanced MRI of the liver including a T2-weighted 3D TSE MRCP (T2w-MRCP) as well as a late phase T1-weighted THRIVE sequences applying ...
Harteela Markus M Department of Mathematics and Statistics, University of Turku , Turku , - - 2014
Background. Respiratory motion in positron emission tomography/computed tomography (PET/CT) causes underestimation of standardized uptake value (SUV) and variation of lesion volume, while PET and CT attenuation correction (CTAC) mismatch may introduce artefacts. The aim was to compare end-expiratory gating methods of PET and CTAC. Material and methods. Three methods named ...
Kritsaneepaiboon Supika S Department of Radiology, Faculty of Medicine, Prince of Songkla University, Hat Yai, 90110, - - 2014
Objectives: To compare multi-detector CT (MDCT) radiation doses between default settings and a revised dose reduction protocol and to determine whether the diagnostic confidence can be maintained with imaging quality made under the revised protocol in pediatric head, chest and abdominal CT studies. Methods: The study retrospectively reviewed head, chest, ...
Hennedige Tiffany T Department of Diagnostic Imaging, National University Hospital, Singapore, - - 2014
To determine the utility of non-contrast-enhanced CT (NC-CT) for improved detection of hyperenhancement in hepatocellular carcinomas (HCC). We performed a retrospective analysis on CT studies of 104 consecutive patients with 124 HCCs between October 2006 and December 2012. The enhancement of HCC was evaluated on quadriphasic CT: non-contrast (NC), arterial ...
Zouitina Yassine - - 2014
Transient visual disturbances constitute the most commonly reported neurological side effect during and immediately after sclerotherapy. A few studies, based on clinical and diffusion-weighted MRI assessments, have suggested that these transient neurological symptoms correspond to migraine with aura. Recently, it has been reported that brain magnetic resonance imaging can reveal ...
Vantine Paul R PR Department of Radiology, University of New Mexico Health Science Center, MSC10 5530, 1 University of New Mexico, Albuquerque, NM, 87131-0001, - - 2014
This work was conducted to determine whether non-contrast-enhanced CT (NECT) of patients with suspected acute aortic syndrome (AAS) can identify patients with a very low likelihood of a positive diagnosis. In the derivation phase, patients who received both NECT and contrast-enhanced CT angiography (CTA) for suspected AAS were identified. Two ...
Christian Eisha E Department of Neurosurgery, Keck School of Medicine of USC, Los Angeles, CA, USA. Electronic address: - - 2014
Although the concept of focused ultrasonography emerged over seventy years ago, the need for a craniectomy obviated its development as a noninvasive technology. Since then, advances in phased array transducers and magnetic resonance imaging technology have resurrected the ultrasound as a noninvasive therapeutic for a plethora of neurologic conditions ranging ...
Shin Kyung Eun KE Department of Radiology and Center for Imaging Science, Sungkyunkwan University School of Medicine, Seoul, - - 2014
Subcentimeter nodules without change in size during long-term follow-up period (for minimum 2 years) are assumed as benign lesions. However, the 2-year stability rule has not been fully verified so far and is still questionable. Thus, we aimed to retrospectively investigate long-term follow-up results for 2-year stable subcentimeter nodules at ...
Kang Do Hyun DH Department of Mechanical and Aerospace Engineering, WCU Program for Multiscale Mechanical Design, ‡Institute of Advanced Machinery and Design, Department of Mechanical and Aerospace Engineering, §Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agriculture and Life Sciences, Seoul National University , Seoul, 151-742, Republic of - - 2014
Janus-compartmental alginate microbeads having two divided phases of sensory polydiacetylene (PDA) liposomes and magnetic nanoparticles were fabricated for facile sensory applications. The sensory liposomes are composed of PDA for label-free signal generation and 1,2-dipalmitoyl-sn-glycero-3-galloyl (DPGG) lipids whose galloyl headgroup has specific interactions with lead(II). The second phase having magnetic nanoparticles ...
Wintermark Max M Department of Radiology, Neuroradiology Division, University of Virginia, Charlottesville, VA, USA. Department of Radiology, Centre Hospitalier Universitaire Vaudois, Lausanne, - - 2014
Precise focusing is essential for transcranial MRI-guided focused ultrasound (TcMRgFUS) to minimize collateral damage to non-diseased tissues and to achieve temperatures capable of inducing coagulative necrosis at acceptable power deposition levels. CT is usually used for this refocusing but requires a separate study (CT) ahead of the TcMRgFUS procedure. The ...
Ventriglia Anna A Department of Radiology, University of Verona, P.le L. A. Scuro 10, 37134, Verona, Italy, - - 2014
To evaluate the magnetic resonance imaging (MRI) findings of solid pseudopapillary neoplasm (SPN) of the pancreas. From January 2006 to December 2013, 41 patients with SPN of the pancreas were retrospectively evaluated. Inclusion criteria were the execution of an MR examination and tumor resection with an histopathological evaluation at our ...
Freesmeyer Martin M Clinic of Nuclear Medicine, Jena University Hospital, Bachstrasse 18, 07740, Jena, Germany, - - 2014
To detect hypervascularized liver lesions, early dynamic (ED) (18)F-FDG PET may be an alternative when contrast-enhanced (CE) imaging is infeasible. This retrospective pilot analysis compared contrast between such lesions and liver parenchyma, an important objective image quality variable, in ED PET versus CE CT. Twenty-eight hypervascularized liver lesions detected by ...
Le Fur Yann Y CRMBM UMR 7339, Aix-Marseille Université, CNRS, 13385, Marseille, France, - - 2014
In a previous study, we have shown that modulus post-processing is a simple and efficient tool to both phase correct and frequency align magnetic resonance (MR) spectra automatically. Furthermore, this technique also eliminates sidebands and phase distortions. The advantages of the modulus technique have been illustrated in several applications to ...
Valdés Olmos R A RA Diagnostic Oncology, Department of Nuclear Medicine, Netherlands Cancer Institute - Antoni van Leuwenhoek Hospital Amsterdam, The Netherlands - - - 2014
The popularity gained by the sentinel lymph node (SLN) procedure in the last two decades did increase the interest of the surgical disciplines for other applications of radioguided surgery. An example is the gamma-probe guided localization of occult or difficult to locate neoplastic lesions. Such guidance can be achieved by ...
Guijian Liu L Key Laboratory of Viral Heart Diseases, Ministry of Public Health, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, - - 2014
Asymptomatic cerebral injury (ACI) detected by diffusion-weighted magnetic resonance imaging (MRI) following atrial fibrillation (AF) ablation has been reported recently. The purpose of this study was to provide an overview of the incidence of ACI detected by MRI following AF ablation and to explore the association between ablation technology and ...
Aoyagi Jun J Department of Pediatrics, Jichi Medical University, Tochigi, - - 2014
It has been established that enhanced computed tomography (CT) and (99m) Tc-dimercaptosuccinic acid renal scintigraphy ((99m) Tc-DMSA scintigraphy) used in conjunction with single-photon emission CT is a useful tool for the diagnosis of acute pyelonephritis (APN). The utility of non-enhanced magnetic resonance imaging (MRI), however, has not been investigated extensively ...
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