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Stern Jessica S JS Department of Medical Imaging, Ann & Robert H. Lurie Children's Hospital of Chicago, Northwestern University, 225 East Chicago Avenue, Box 9, Chicago, IL 60611, USA; Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA. Electronic address: - - 2015
Medical imaging is an important tool in the evaluation and classification of pediatric head and neck masses. Such lesions may include congenital, inflammatory, infectious, vascular, or neoplastic processes. Ultrasound is often the first line modality in the workup of a neck mass in a child, followed by MRI or CT ...
Sanz Enrique E Urology Department, Hospital Universitario Ramón y Cajal, Alcalá University, Madrid, - - 2015
Strict imaging follow-up is mandatory after cryoablation of small renal masses (SRMs). Although it uses ionizing radiation and nephrotoxic iodinated contrast, computed tomography (CT) is still the gold standard test. Contrast-enhanced ultrasound (CEUS) is a novel technique that informs in real time about renal perfusion avoiding radiation and nephrotoxicity. The ...
Kamei Osamu O *Graduate school, Oita University of Nursing and Health Sciences, 2944-9 Megusuno, Oita city, Oita 870-1201, Japan; †Department of Health Sciences, Oita University of Nursing and Health Sciences, 2944-9 Megusuno, Oita city, Oita 870-1201, Japan; ‡Shin-Beppu Hospital, 3898 Tsurumi, Beppu-shi, Oita 874-0833, Japan; §Tokyo Healthcare University, 2-5-23 Higashigaoka, Meguro-ku, Tokyo 152-8558, Japan; **Oia Prefectural Hospital, 476 Bunyou, Oita-shi, Oita 870-851, - - 2015
Computed tomography (CT) dose calculators such as the WAZA-ARI are useful for estimating the radiation dose from CT examination. This study determined correction coefficients for estimating organ doses to patients of any size attended to in daily clinical practice. To this end, the authors constructed voxel phantoms based on the ...
Macchi Monica M Department of Radiology. University Hospital. Varese, Italy - - 2014
Computed tomography angiography (CTA) is the most employed modality in the follow-up after endovascular aneurysm repair (EVAR) of abdominal aorta (AA); repeated standard controls expose patients to a high cumulative radiation dose (RD). To compare image quality and RD between 100 kV and 120 kV protocols in the same group of patients, ...
Shuaib Waqas W Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, Georgia - - 2014
Facial Computed Tomography (CT) is often performed in the emergency department as a part of the diagnostic workup for patient's presenting with the signs and symptoms of dentoalveolar abscess (DA). This investigation evaluates the diagnostic yield of the facial CT and its effects on management change in patients suspected of ...
Sanchez Thomas R TR Division of Pediatric Radiology, University of California-Davis, Medical Center Children's Hospital, 4860 Y St., Ste. 3100 ACC, Sacramento, CA, 95817, USA, - - 2014
The cornerstone of child abuse imaging is the skeletal survey, but initial imaging with radiographs may not demonstrate acute and non-displaced fractures, especially those involving the ribs. Given the high mortality of undiagnosed non-accidental trauma, timely diagnosis is crucial. CT is more sensitive in assessing rib fractures; however the effective ...
Mueck Fabian G FG Department of Clinical Radiology, Hospital of the Ludwig-Maximilians-University of Munich, Downtown Campus, Nußbaumstr. 20, Munich 80336, Germany. Electronic address: - - 2014
Dose reduction may compromise patients because of a decrease of image quality. Therefore, the amount of dose savings in new dose-reduction techniques needs to be thoroughly assessed. To avoid repeated studies in one patient, chest computed tomography (CT) scans with different dose levels were performed in corpses comparing model-based iterative ...
Sarracanie Mathieu M Imagerie par Résonance Magnétique Médicale et Multi-Modalités (UMR8081), IR4M, Université Paris-Sud, CNRS, Orsay, France; Department of Physics, Harvard University, Cambridge, MA, USA; MGH/A. A. Martinos Center for Biomedical Imaging, Boston, MA, - - 2014
One of the key challenges in the study of health-related aerosols is predicting and monitoring sites of particle deposition in the respiratory tract. The potential health risks of ambient exposure to environmental or workplace aerosols and the beneficial effects of medical aerosols are strongly influenced by the site of aerosol ...
Ginat Daniel Thomas DT Department of Radiology, University of Chicago Medical Center, 5841 S Maryland Avenue, Chicago, IL, 60637, USA, - - 2014
Dual-energy CT provides insights into the material properties of the tissues and can differentiate between tissues that have similar attenuation on conventional, single energy CT imaging. It has several useful and promising applications in head and neck imaging that an otolaryngologist could use to deliver improved clinical care. These applications ...
Kang Stella K SK 1 Department of Radiology, NYU Langone Medical Center, 550 First Ave, New York, NY - - 2014
OBJECTIVE. The objective of this study was to quantify the effects of radiation-induced cancer risks in patients with Bosniak category IIF lesions undergoing CT versus MRI surveillance. MATERIALS AND METHODS. We developed a Markov-Monte Carlo model to determine life expectancy losses attributable to radiation-induced cancers in hypothetical patients undergoing CT ...
Kim Edward E 1 Department of Interventional Radiology, Mount Sinai Medical Center, One Gustave L. Levy Pl, Box 1234, New York, NY - - 2014
OBJECTIVE. The purpose of this study is to evaluate the effectiveness of electromagnetic tracking in assisting CT-guided liver biopsies. MATERIALS AND METHODS. This was a single-center prospective randomized controlled trial comparing nonfluoroscopic CT-guided liver biopsy using an advance-and-scan technique with and without electromagnetic tracking. Fifty patients with a liver lesion ...
Mayo-Smith William W WW From the Department of Radiology, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence, RI (W.W.M.); Department of Radiology, Mayo Clinic Arizona, Scottsdale, Ariz (A.K.H., W.P.); Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Md (M.M.); and Department of Abdominal Imaging/Intervention, Massachusetts General Hospital, Boston, Mass - - 2014
Computed tomography (CT) is an imaging test that is widely used worldwide to establish medical diagnoses and perform image-guided interventions. More recently, concern has been raised about the risk of carcinogenesis from medical radiation, with a focus on CT. The purpose of this article is to (a) describe the importance ...
Kumarasiri Akila A Department of Radiation Oncology, Henry Ford Health System, Detroit, Michigan - - 2014
To evaluate the clinical potential of deformable image registration (DIR)-based automatic propagation of physician-drawn contours from a planning CT to midtreatment CT images for head and neck (H&N) adaptive radiotherapy. Ten H&N patients, each with a planning CT (CT1) and a subsequent CT (CT2) taken approximately 3-4 week into treatment, ...
Svensson Anders A Department of Clinical Science, Intervention and Technology at Karolinska Institutet , Division of Medical Imaging and Technology, Stockholm, Sweden; Department of Radiology, Karolinska University Hospital in Huddinge, SE-14186 Stockholm, Sweden. Electronic address: - - 2014
To evaluate the function of arterial-venous (AV) dialysis fistula using dynamic computed tomography (CT) and time-resolved 3D volume rendering (VR). Seven patients referred for angiographic CT examination of the AV dialysis fistula were enrolled. Twenty-four grams of iodine were administered intravenously (iomeprol 400 mg I/ml at 6 ml/s) followed by ...
Sun Hao H Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, - - 2014
Objective To investigate the image quality, radiation dose and diagnostic value of the low-tube-voltage high-pitch dual-source computed tomography (DSCT) with sinogram affirmed iterative reconstruction (SAFIRE) for non-enhanced abdominal and pelvic scans. Methods This institutional review board-approved prospective study included 64 patients who gave written informed consent for additional abdominal and ...
Khawaja Ranish Deedar Ali RD Harvard Medical School, MGH Imaging, Massachusetts General Hospital, 25 New Chardon St., 4th floor, Boston, MA, 02114, USA, - - 2014
Dose reduction in children undergoing CT scanning is an important priority for the radiology community and public at large. Drawbacks of radiation reduction are increased image noise and artifacts, which can affect image interpretation. Iterative reconstruction techniques have been developed to reduce noise and artifacts from reduced-dose CT examinations, although ...
He Jingzhen J Department of Radiology of Shandong University, Qilu Hospital, 107 Wenhuaxi Road, Jinan 250012, Shandong, - - 2014
To compare the quantitative and subjective image quality in abdominal angiography between dual-energy CT (DECT) at the routine concentration of iodinated contrast agent (300mg/mL) and conventional 120-kVp single-energy CT (SECT) at the high concentration of contrast agent (370mg/mL). Abdominal computed tomography angiography (CTA) was performed in 104 patients, including 56 ...
Hwang Shin Hye SH Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, - - 2014
To evaluate feasibility of radiation dose reduction by optimal phase selection of computed tomography (CT) in patients who visited the emergency department (ED) for abdominal pain. We included 253 patients who visited the ED for abdominal pain. They underwent multiphasic CT including precontrast, late arterial phase (LAP), and hepatic venous ...
Anzidei Michele M Department of Radiological, Oncological and Anatomopathological Sciences - Radiology - Sapienza, University of Rome, Viale Regina Elena 324, 00161, Rome, Italy, - - 2014
Evaluate the performance of a robotic system for CT-guided lung biopsy in comparison to the conventional manual technique. One hundred patients referred for CT-guided lung biopsy were randomly assigned to group A (robot-assisted procedure) or group B (conventional procedure). Size, distance from entry point and position in lung of target ...
Speirs Christina K CK Department of Radiation Oncology, Siteman Cancer Center, Center for Advanced Medicine, Washington University, 4921 Parkview Place, Saint Louis, MO 63110, - - 2015
In this review, we review the literature on the use of PET in radiation treatment planning, with an emphasis on describing our institutional methodology (where applicable). This discussion is intended to provide other radiation oncologists with methodological details on the use of PET imaging for treatment planning in radiation oncology, ...
Zhang Min M School of Computing, Informatics Decisions and System Engineering, Arizona State University, Tempe, AZ, - - 2014
Excessive cephalocaudal anatomic (Z-axis) coverage can lead to unnecessary radiation exposure to a patient. In this study, an automated computing model was developed for identifying instances of potentially excessive Z-axis coverage with abdomen-pelvis examinations. Eight patient and imaging attributes including patient gender, age, height, weight, volume CT dose index (CTDIvol), ...
Valeri Gianluca G Clinical Radiology, AOU Ospedali Riuniti, Ancona, Italy, - - 2014
This study was done to evaluate the appropriateness of dose indices in computed tomography (CT) by comparing the body computed tomography dose index (CTDI) and the size-specific dose estimates (SSDE) to determine which of these two parameters is more appropriate to estimate the radiation dose to both adult and paediatric ...
Brix Gunnar G Department of Medical and Occupational Radiation Protection, Federal Office for Radiation Protection, Ingolstädter Landstraße 1, D-85764 Oberschleissheim, Germany. Electronic address: - - 2014
Dynamic contrast-enhanced (DCE) CT studies are increasingly used in both medical care and clinical trials to improve diagnosis and therapy management of the most common life-threatening diseases: stroke, coronary artery disease and cancer. It is thus the aim of this review to briefly summarize the current knowledge on deterministic and ...
Farmakis Shannon G SG Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 S. Kingshighway Blvd., St. Louis, MO, 63110, - - 2014
Magnetic resonance (MR) angiography has significantly reduced the need for diagnostic conventional angiography and is preferred over CT angiography in children because of its lack of ionizing radiation. The availability of gadofosveset trisodium (the only clinically approved blood pool MR contrast agent) has led to an increase in applications of ...
Kim Moon Chan MC Department of Radiology, Samsung Medical Center, Seoul, - - 2014
14 620 sets of patient dose data were obtained for 31 different models of computed tomography (CT) equipment (total 73) with 18 types of CT examination in Korea. Specific diagnostic reference levels (DRLs) for this study in terms of third quartile volumetric CT dose index in mGy [and dose-length product ...
Midgley S M SM School of Physics, Monash University, Clayton, Victoria 3080, Australia. William Buckland Radiotherapy Centre, Alfred Hospital, Melbourne, VIC, 3181, - - 2014
A parametric model for the x-ray linear attenuation coefficient is used to describe the compositional dependence of Hounsfield numbers measured by medical CT scanners. Measurements with materials of known density and composition, that span and evenly sample the compositional range of tissues, are written as linear simultaneous equations and solved for ...
Kobayashi Masanao M Department of Radiology, Fujita Health University Hospital, Toyoake, Japan Graduate School of Medical Sciences, Division of Medical Sciences, Kanazawa University, Kanazawa, Japan - - 2014
The relationship between heart rate (HR) and computed tomography dose index (CTDI) was evaluated using an electrocardiogram (ECG) gate scan for scan applications such as prospective triggering, Ca scoring, target computed tomography angiography (CTA), prospective CTA and retrospective gating, continuous CTA/CFA (cardiac functional analysis) and CTA/CFA modulation. Even in the ...
Zheng Minwen M Department of Radiology, Xijing Hospital, Fourth Military Medical University, No. 169, West Changle Road, Xi'an, Shaanxi Province 710032, China. Electronic address: - - 2014
To assess the impact of low-concentration contrast medium on vascular enhancement, image quality, and radiation dose of coronary computed tomography (CT) angiography (CCTA) by using prospectively electrocardiography (ECG)-triggered high-pitch spiral acquisition with low tube voltage in combination with iterative reconstruction. One hundred patients (body mass index ≤ 25 kg/m(2), heart rate ≤ 65 beats per ...
Granata Claudio C Department of Radiology, IRCCS Istituto Giannina Gaslini, Largo Gaslini, 16147, Genoa, Italy, - - 2014
Multidetector CT (MDCT) scanners have contributed to the widespread use of CT in paediatric imaging. However, concerns are raised for the associated radiation exposure. Very few surveys on radiation exposure from MDCT studies in children are available. The aim of this study was to outline the status of radiation exposure ...
Pontone Gianluca G Centro Cardiologico Monzino, IRCCS, Milan, Italy. Electronic address: - - 2014
The outcome of radiofrequency catheter ablation (RFCA) has been improved by the pivotal role of cardiovascular imaging such as cardiac computed tomography (CCT) or cardiac magnetic resonance (CMR) for the characterization of left atrium (LA) anatomy before RFCA. The aim of this study is to compare the procedural characteristics, overall ...
Cornelis F F Interventional Radiology Service, Department of Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY, 10065, - - 2014
To compare CT fluoroscopy-guided manual and CT-guided robotic positioning system (RPS)-assisted needle placement by experienced IR physicians to targets in swine liver. Manual and RPS-assisted needle placement was performed by six experienced IR physicians to four 5 mm fiducial seeds placed in swine liver (n = 6). Placement performance was assessed for placement ...
Kornerup Josefine S JS Section of Radiotherapy, Department of Oncology, Rigshospitalet, Blegdamsvej 9, 2100, Copenhagen, Denmark, - - 2014
PET/CT may be more helpful than CT alone for radiation therapy planning, but the added risk due to higher doses of ionizing radiation is unknown. To estimate the risk of cancer induction and mortality attributable to the [F-18]2-fluoro-2-deoxyglucose (FDG) PET and CT scans used for radiation therapy planning in children ...
Kim Joshua J Department of Radiation Oncology, Henry Ford Health System, Detroit, Michigan. Electronic address: - - 2014
To describe and evaluate a method for generating synthetic computed tomography (synCT) images from magnetic resonance simulation (MR-SIM) data for accurate digitally reconstructed radiograph (DRR) generation and dose calculations in prostate cancer radiation therapy. A retrospective evaluation was performed in 9 prostate cancer patients who had undergone MR-SIM in addition ...
Zhang Hui H Department of Neurosurgery, Chinese PLA General Hospital, 28 Fuxing Road, Haidian District, Beijing 100853, China; Department of Neurosurgery, Air Force General Hospital of the Chinese PLA, Haidian District, Beijing, - - 2014
Radiation necrosis (RN) may be a confounder in the diagnosis of glioma recurrence. Several functional imaging techniques, including single photon emission computed tomography (SPECT) and positron emission tomography (PET), have been used to differentiate RN from glioma recurrence. However, to our knowledge the efficacy of SPECT has not been evaluated ...
Kim Young-Sun YS Department of Radiology and Centre for Imaging Science, Samsung Medical Centre, Sungkyunkwan University School of Medicine , Seoul , - - 2014
Abstract The clinical role of magnetic resonance image-guided high-intensity focused ultrasound (MR-HIFU) is rapidly expanding due to its merit of non-invasiveness. MR thermometry based on a proton resonance frequency shift technique is able to accurately measure HIFU-induced temperature changes, which provides considerable advantages over ultrasonography-guided HIFU in terms of safety ...
Zhang Jin-Ling JL Department of CT, The Second Affiliated Hospital of Harbin Medical University, Harbin, - - 2014
To investigate the image quality and radiation dose of combined coronary and carotid/cerebrovascular angiography with ECG gating and iterative reconstruction using 256-slice CT compared with the findings with the two examinations performed separately. One hundred sixty-five consecutive patients underwent a single-injection single-pass combination of coronary and carotid/cerebrovascular CT angiography (group ...
Gibson David - - 2014
BackgroundComputed tomography (CT) scanning is a relatively high radiation dose diagnostic imaging modality with increasing concerns about radiation exposure burden at the population level in scientific literature. This study examined the epidemiology of adult CT utilisation in Western Australia (WA) in both the public hospital and private practice settings, and ...
Suliman I I II Department of Radiology and Molecular Imaging, Medical Physics Section, College of Medicine and Health Sciences, Sultan Qaboos University, PO Box 35, 123 Al-Khod, Oman Sudan Atomic Energy Commission, Radiation Safety Institute, PO Box 3001, Khartoum, Sudan isuliman@squ.edu.om - - 2014
The purpose of this study was to assess the magnitude of radiation exposure during paediatric CT in Sudanese hospitals. Doses were determined from CT acquisition parameters using CT-Expo 2.1 dosimetry software. Doses were evaluated for three patient ages (0-1, 1-5 and 5-10 y) and two common procedures (head and abdomen). ...
Chemouni David D 1 Radiology Department, APHM, Hôpital Sainte Marguerite, 270 Blvd de Sainte Marguerite, 13009 Marseille, - - 2014
OBJECTIVE. The purpose of this study is to compare the diagnostic performance and radiation exposure of flat-panel CT arthrography for cartilage defect detection in the ankle joint to standard MDCT arthrography, using gross anatomy and thermoluminescent dosimetry as reference standards. MATERIALS AND METHODS. Ten cadaveric ankle specimens were obtained from ...
Vanderhave Kelly L - - 2014
Ultrasonography is an excellent adjunct to other musculoskeletal imaging tools utilized in the pediatric population and in some instances offers advantages over CT and MRI. It permits dynamic examination of anatomic structures and assists in guiding minimally invasive procedures. In the lower extremity, ultrasonography assists in screening for such disorders ...
Worrall James C - - 2014
ABSTRACTObjectives:Computed tomography (CT) use is increasing in the emergency department (ED). Many physicians are concerned about exposing patients to radiation from CT scanning, but estimates of radiation doses vary. This study's objective was to determine the radiation doses from CT scanning for common indications in a Canadian ED using modern ...
Brezovich Ivan A IA Department of Radiation Oncology, University of Alabama at Birmingham, Birmingham, Alabama - - 2014
Spatial accuracy is most crucial when small targets like the trigeminal nerve are treated. Although current quality assurance procedures typically verify that individual apparatus, like the MRI scanner, CT scanner, Gamma Knife, etc., are meeting specifications, the cumulative error of all equipment and procedures combined may exceed safe margins. This ...
Moteabbed M M Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts - - 2014
Magnetic resonance imaging (MRI) is a prime candidate for image-guided radiotherapy. This study was designed to assess the feasibility of real-time MRI-guided proton therapy by quantifying the dosimetric effects induced by the magnetic field in patients' plans and identifying the associated clinical consequences. Monte Carlo dose calculation was performed for ...
Li Xinhua X Division of Diagnostic Imaging Physics and Webster Center for Advanced Research and Education in Radiation, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts - - 2014
The approach to equilibrium function has been used previously to calculate the radiation dose to a shift-invariant medium undergoing CT scans with constant tube current [Li, Zhang, and Liu, Med. Phys. 39, 5347-5352 (2012)]. The authors have adapted this method to CT scans with tube current modulation (TCM). For a ...
Niwa Shinji - - 2014
The performance of individual computed tomography automatic exposure control (CT-AEC) is very important for radiation dose reduction and image quality equalization in CT examinations. The purpose of this study was to evaluate the performance of CT-AEC in conventional pitch mode (Normal spiral) and fast dual spiral scan (Flash spiral) in ...
Jang Christina C School of Medicine, University of Queensland, Brisbane, Qld, Australia Department of Endocrinology and Diabetes, Princess Alexandra Hospital, Brisbane, Qld, - - 2014
PET-CT using (18)F-FDG is employed for detecting brown adipose tissue (BAT) in humans. Alternative methods are needed because of the radiation and cost of PET-CT imaging. The aim was to evaluate the accuracy of infrared thermography (IRT) in detecting human BAT benchmarked to PET-CT imaging. Seventeen individuals underwent a total ...
Gill Kara G KG Division of Pediatric Radiology, Department of Radiology, University of Wisconsin School of Medicine and Public Health, 600 Highland Avenue, CSC E3/366, Madison, WI 53792-3252, USA. Electronic address: - - 2014
In pediatric patients, the high resolution and excellent soft-tissue contrast of magnetic resonance (MR) imaging allows for complete evaluation of osseous and soft-tissue structures around the knee joint, and its lack of ionizing radiation makes it a preferred modality for advanced imaging. Older children and adolescents are most commonly imaged ...
Ahn Se Jin SJ Department of Radiology, Seoul National University College of Medicine, Seoul 110-744, - - 2014
To compare the image quality of shoulder CT arthrography performed using 120 kVp and 140 kVp protocols. Fifty-four CT examinations were prospectively included. CT scans were performed on each patient at 120 kVp and 140 kVp; other scanning parameters were kept constant. Image qualities were qualitatively and quantitatively compared with ...
Sun Hao H Department of Radiology,PUMC Hospital,CAMS and PUMC,Beijing - - 2014
Objective To retrospectively evaluate the clinical feasibility of high-pitch excretory phase images during dual-source CT urography with Stellar photon detector. Methods Totally 100 patients received dual-source CT high-pitch urinary excretory phase scanning with Stellar photon detector[80 kV,ref.92 mAs,CARE Dose 4D and CARE kV,pitch of 3.0,filter back projection reconstruction algorithm (FBP)](group ...
Smith Martin P MP *Beth Israel Deaconess Medical Center, Boston, Massachusetts; †Winthrop-University Hospital, Mineola, New York; ‡Inland Imaging Associates and University of Washington, Seattle, Washington; §Virginia Commonwealth University Medical Center, Richmond, Virginia; ∥University of South Alabama, Mobile, Alabama, American Gastroenterological Association; ¶University of Wisconsin Hospital and Clinics, Madison, Wisconsin; #Hartford Hospital, Hartford, Connecticut, American College of Surgeons; **Emory University, Atlanta, Georgia; ††Vanderbilt University Medical Center, Nashville, Tennessee, Society of Nuclear Medicine; ‡‡Milton S. Hershey Medical Center, Hershey, Pennsylvania, Society of Nuclear Medicine; §§Northwestern University, Chicago, Illinois; ∥∥University of California San Francisco, San Francisco, California; and ¶¶University of Massachusetts Memorial Medical Center, Worcester, - - 2014
The most common cause of acute right lower quadrant (RLQ) pain requiring surgery is acute appendicitis (AA). This narrative's focus is on imaging procedures in the diagnosis of AA, with consideration of other diseases causing RLQ pain. In general, Computed Tomography (CT) is the most accurate imaging study for evaluating ...
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