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imaging protocols

Fabiana Q Silva, Mehreen Adhi, Karen M Wai, Leann Olansky, M Cecilia Lansang, Rishi P Singh
BACKGROUND AND OBJECTIVE: The purpose of this study was to identify whether endocrinologists and primary care physicians (PCP) adequately screen for ophthalmic symptoms/signs within office visits and provide timely ophthalmology referrals in patients with diabetes. PATIENTS AND METHODS: Patients between the ages of 18 years and 80 years with diabetes who underwent an office visit with an endocrinologist or a PCP between January 1, 2014, and December 31, 2014, were identified...
October 1, 2016: Ophthalmic Surgery, Lasers & Imaging Retina
Felipe P Andrade, Roberto Montoro, Renan Oliveira, Gabriela Loures, Luana Flessak, Roberta Gross, Camille Donnabella, Andrea Puchnick, Lisa Suzuki, Rodrigo Regacini
OBJECTIVES: 1) To verify clinical signs correlated with appropriate cranial computed tomography scan indications and changes in the therapeutic approach in pediatric minor head trauma scenarios. 2) To estimate the radiation exposure of computed tomography scans with low dose protocols in the context of trauma and the additional associated risk. METHODS: Investigators reviewed the medical records of all children with minor head trauma, which was defined as a Glasgow coma scale ≥13 at the time of admission to the emergency room, who underwent computed tomography scans during the years of 2013 and 2014...
October 1, 2016: Clinics
Miguel José Francisco, Antonio Rahal, Fabio Augusto Cardillo Vieira, Paulo Savoia Dias da Silva, Marcelo Buarque de Gusmão Funari
Ultrasound examination of the chest has advanced in recent decades. This imaging modality is currently used to diagnose several pathological conditions and provides qualitative and quantitative information. Acoustic barriers represented by the aerated lungs and the bony framework of the chest generate well-described sonographic artifacts that can be used as diagnostic aids. The normal pleural line and A, B, C, E and Z lines (also known as false B lines) are artifacts with specific characteristics. Lung consolidation and pneumothorax sonographic patterns are also well established...
July 2016: Einstein
Meng Li, Shichao Feng, Ning Wu, Li Zhang
OBJECTIVE: The aim of our study was to assess radiation dose reduction and image quality for enhanced chest CT examinations with a scout-based automated tube potential selection technique (kV Assist) compared with a standard 120-kV protocol. METHODS: Prospective study of enhanced chest CT examinations was performed in 100 consecutive patients with kV Assist and in 100 consecutive patients with conventional 120-kV protocol on a multislice CT (Discovery CT750 HD)...
October 18, 2016: Journal of Computer Assisted Tomography
Theodore F Towse, Christopher P Elder, Emily C Bush, Samuel W Klockenkemper, Jared T Bullock, Richard D Dortch, Bruce M Damon
Muscle blood oxygenation-level dependent (BOLD) contrast is greater in magnitude and potentially more influenced by extravascular BOLD mechanisms at 7 T than it is at lower field strengths. Muscle BOLD imaging of muscle contractions at 7 T could, therefore, provide greater or different contrast than at 3 T. The purpose of this study was to evaluate the feasibility of using BOLD imaging at 7 T to assess the physiological responses to in vivo muscle contractions. Thirteen subjects (four females) performed a series of isometric contractions of the calf muscles while being scanned in a Philips Achieva 7 T human imager...
October 18, 2016: NMR in Biomedicine
Martina F Callaghan, Siawoosh Mohammadi, Nikolaus Weiskopf
Quantitative MRI (qMRI) provides standardized measures of specific physical parameters that are sensitive to the underlying tissue microstructure and are a first step towards achieving maps of biologically relevant metrics through in vivo histology using MRI. Recently proposed models have described the interdependence of qMRI parameters. Combining such models with the concept of image synthesis points towards a novel approach to synthetic qMRI, in which maps of fundamentally different physical properties are constructed through the use of biophysical models...
October 18, 2016: NMR in Biomedicine
Matthias Echternach, Fabian Burk, Michael Burdumy, Christian T Herbst, Marie Köberlein, Michael Döllinger, Bernhard Richter
OBJECTIVES/HYPOTHESIS: In professional classical singing, an even voice quality throughout the entire singing voice range is essential. Transitions between vocal registers (passaggio) are the technically most challenging aspects in classical singing. It is hypothesized that they are most affected by vocal fold mass lesions (VFML). STUDY DESIGN: Cohort study. METHODS: In this study, the effect of VFML on vocal fold vibration in the passaggio regions was analyzed in four female and three male singers suffering from organic dysphonia...
October 18, 2016: Laryngoscope
J Gallo, N Vasimalai, M T Fernandez-Arguelles, M Bañobre-López
Diagnosis by MRI is frequently non-trivial due to the low sensitivity of the technique. Signal enhancing contrast agents (CAs) are used to aid in the analysis of MR images. We present here a simple protocol for the preparation of responsive CAs based on Mn nanosheets. Mn nanostructures presented here undergo a chemical and structural change in the presence of altered physiological conditions that activate their signal. This strategy allows for a reduction of background, increasing the sensitivity of the technique...
October 18, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Thomas Hanna, Jacob A Akoh
Renal hyperparathyroidism (RHPT) is a common complication of renal failure and it is associated with significant morbidity and mortality. The aim of this study was to determine the patient characteristics which might predict persistent or recurrent hyperparathyroidism after surgery and to assess the long-term effect of unsuccessful surgery. This is a retrospective study of all chronic kidney disease patients who required a total parathyroidectomy (TP) because of failed medical management from January 1999 to December 2014...
September 2016: Saudi Journal of Kidney Diseases and Transplantation
Andrea E Geddes, Clay Cothren Burlew, Amy E Wagenaar, Walter L Biffl, Jeffrey L Johnson, Fredric M Pieracci, Eric M Campion, Ernest E Moore
BACKGROUND: We implemented expanded screening criteria for blunt cerebrovascular injuries (BCVIs) in an attempt to capture the remaining 20% of patients not historically identified with earlier protocols. We hypothesized that these expanded criteria would capture the additional 20% of BCVI patients not previously identified. METHODS: Screening criteria for BCVI were expanded in 2011 after identifying new injury patterns. The study population included 4 years prior (2007 to 2010; classic) and following (2011 to 2014; expanded) implementation of expanded criteria...
September 29, 2016: American Journal of Surgery
Babak Fallahi, Davood Beiki, Yalda Salehi, Alireza Emami-Ardekani, Armaghan Fard-Esfahani, Farahnaz Aghahosseini, Mahdi Haghighatafshar, Mohammad Eftekhari
OBJECTIVE: With respect to the equivocal value of the reverse perfusion pattern (RPP) in technetium-99m (Tc)-sestamibi myocardial perfusion imaging, a study was carried out to evaluate this pattern in association with the presence or absence of coronary artery disease (CAD) and other underlying factors, mainly the time of acquisition and the presence of intense visceral uptake. PATIENTS AND METHODS: We prospectively studied 102 patients with a moderate risk of CAD (41 men and 61 women, mean age: 56...
October 4, 2016: Nuclear Medicine Communications
Sitah F Alanazi, Khalid S Alzimami, Magdy M Ghannam, Ibrahim J Aljammaz, Faisal Alrumayan, Salem A Sassi
PURPOSE: Interest in PET imaging using zirconium-89 (Zr) (t1/2=78.41 h)-labeled tracers for the tracking and quantification of monoclonal antibodies (mAbs) is growing, mainly because of its well-matched physical half-life with the biological half-life of intact mAbs. This study aims to evaluate the imaging characteristics of Zr-PET in comparison with those obtained using fluorine-18 fluorodeoxyglucose (F-FDG) PET (gold standard tracer in PET imaging) using a Time-Of-Flight (TOF) PET/computed tomography (CT) scanner...
October 4, 2016: Nuclear Medicine Communications
German Gomez-Roman, Steffen Launer
BACKGROUND: The purpose of this retrospective long-term study was to evaluate the peri-implant bone changes in immediate implants and matched non-immediate implants as a control group using a specific and proven measurement protocol over a 10-year period, because there are no similar studies published. METHODS: One hundred and thirty-three patients received 174 implants (immediate implants (IM) n = 87; control group (CG) n = 87). The two groups were matched following specific criteria for comparison: implant length, diameter, site of the implant, and patient's gender...
December 2016: Int J Implant Dent
Dakai Bian, Jason C Tsui, Mikhail Repin, Guy Garty, Helen Turner, Y Lawrence Yao, David J Brenner
Due to the need of high-speed and efficient biodosimetric assays for triage and therapy in the event of radiological or nuclear attack, a robotically based automated biodosimetry tool (RABiT) has been developed over the past few years. Adapting the micronucleus assay from filter plates to V-shaped plates presented challenges in the liquid handling, namely, cell splashing out of the V-shaped well plate during the cell harvesting, poor cell distribution on the bottom of the image plate during the dispensing, and cell loss from the image plate during the aspiration in the liquid handling process...
December 2016: Journal of Medical Devices
Ambra Bisio, Ludovico Pedullà, Laura Bonzano, Piero Ruggeri, Giampaolo Brichetto, Marco Bove
Writing is a means of communication which requires complex motor, perceptual, and cognitive skills. If one of these abilities gets lost following traumatic events or due to neurological diseases, handwriting could deteriorate. Occupational therapy practitioners provide rehabilitation services for people with impaired handwriting. However, to determine the effectiveness of handwriting interventions no studies assessed whether the proposed treatments improved the kinematics of writing movement or had an effect at the level of the central nervous system...
2016: Frontiers in Human Neuroscience
Azadeh Kheirolomoom, Elizabeth S Ingham, Joel Commisso, Neveen Abushaban, Katherine W Ferrara
We previously developed a pH-responsive copper-doxorubicin (CuDox) cargo in lysolipid-based temperature-sensitive liposomes (LTSLs). The CuDox complex is released from the particle by elevated temperature; however, full release of doxorubicin from CuDox requires a reduced pH, such as that expected in lysosomes. The primary goal of this study is to evaluate the cellular uptake and intracellular trafficking of the drug-metal complex in comparison with intact liposomes and free drug. We found that the CuDox complex was efficiently internalized by mammary carcinoma cells after release from LTSLs...
October 13, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
Alexander Morzycki, Anuj Bhatia, Kieran Murphy
Imaging techniques frequently employ contrast agents to improve image resolution and enhance pathology detection. These gadolinium- and iodine-based media, although generally considered safe, are associated with a number of adverse effects ranging from mild to severe. Reactions are classified as either anaphylactoid ("anaphylaxis-like") or nonanaphylactoid, depending on a number of elements that will be reviewed. Herein, we have summarized predisposing risk factors for adverse events resulting from the use of contrast, their associated pathophysiological mechanisms as well as known prophylaxis for the antitreatment of high-risk patients...
October 13, 2016: Canadian Association of Radiologists Journal, Journal L'Association Canadienne des Radiologistes
Rebecca B Goody, Helen MacKay, Bethany Pitcher, Amit Oza, Lillian L Siu, John Kim, Rebecca K S Wong, Eric Chen, Carol Swallow, Jennifer Knox, Zahra Kassam, Bernard Cummings, Ron Feld, David Hedley, Geoffrey Liu, Monika K Krzyzanowska, Robert Dinniwell, Anthony M Brade, Laura A Dawson, Melania Pintilie, Jolie Ringash
PURPOSE: Locoregional recurrence is common after surgery for gastric cancer. Adjuvant therapy improves outcomes but with toxicity. This phase 1/2 study investigated infusional 5-fluorouracil (5-FU) in combination with biweekly cisplatin delivered concurrently with image guided high-precision radiation therapy. METHODS AND MATERIALS: Eligible patients had completely resected stage IB to IV (Union for International Cancer Control TNM 6th edition) nonmetastatic gastric adenocarcinoma...
August 31, 2016: International Journal of Radiation Oncology, Biology, Physics
Kerstin Mueller, Rebecca Fahrig, Michael Manhart, Yu Deuerling-Zheng, Jarrett Rosenberg, Teri Moore, Arundhuti Ganguly, Nishita Kothary
RATIONALE AND OBJECTIVES: Intra-procedural measurement of hepatic perfusion following liver embolization continues to be a challenge. Blood volume imaging before and after interventional procedures would allow identifying the treatment end point or even allow predicting treatment outcome. Recent liver oncology studies showed the feasibility of parenchymal blood volume (PBV) imaging using an angiographic C-arm system. This study was done to evaluate the reproducibility of PBV measurements using cone beam computed tomography (CBCT) before and after embolization of the liver in a swine model...
October 10, 2016: Academic Radiology
Faysal F Altahawi, Kevin J Blount, Nicholas P Morley, Esther Raithel, Imran M Omar
PURPOSE: To compare a faster, new, high-resolution accelerated 3D-fast-spin-echo (3D-FSE) acquisition sequence (CS-SPACE) to traditional 2D and high-resolution 3D sequences for knee 3-T magnetic resonance imaging (MRI). MATERIALS AND METHODS: Twenty patients received knee MRIs that included routine 2D (T1, PD ± FS, T2-FS; 0.5 × 0.5 × 3 mm(3); ∼10 min), traditional 3D FSE (SPACE-PD-FS; 0.5 × 0.5 × 0.5 mm(3); ∼7.5 min), and accelerated 3D-FSE prototype (CS-SPACE-PD-FS; 0...
October 15, 2016: Skeletal Radiology
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