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https://www.readbyqxmd.com/read/28101168/ct-guided-125-i-seed-implantation-for-inoperable-retroperitoneal-sarcoma-a-technique-for-delivery-of-local-tumor-brachytherapy
#1
Biao Yang, Wen-Hao Guo, Ting Lan, Fang Yuan, Guan-Jian Liu, Rui-Yu Zan, Xin You, Qiao-Yue Tan, Zheng-Yin Liao
Radical surgery is currently the first treatment of choice for retroperitoneal soft tissue sarcoma (RSTS). However, the prognosis of RSTS remains poor due to ineffective local control and a high incidence of metastasis after surgical resection. Brachytherapy has been shown to safely provide local radiotherapy for numerous types of cancer when used alone or in combination with surgical resection, but has not been well characterized in the management of RSTS. The aim of this study was to evaluate CT-guided 125I seed implantation for local control and pain relief in the treatment of inoperable RSTS...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28099133/association-between-screen-time-and-snack-consumption-in-children-and-adolescents-the-caspian-iv-study
#2
Roya Kelishadi, Nafiseh Mozafarian, Mostafa Qorbani, Mohammad Reza Maracy, Mohammad Esmaeil Motlagh, Saeid Safiri, Gelayol Ardalan, Hamid Asayesh, Fatemeh Rezaei, Ramin Heshmat
BACKGROUND: The relationship between screen time (ST) and the frequency of snack consumption in a national sample of Iranian children and adolescents was assessed. The present nationwide survey was conducted on 14,880 school students living in urban and rural areas of 30 provinces in Iran. Trained healthcare providers conducted the physical examination and completed the questionnaire of the World Health Organization - Global School-Based Student Health Survey (WHO-GSHS). METHODS: The association between ST (total time spent watching TV and using a computer in leisure time) and the frequency of snack consumption was determined using ordinal logistic regression analysis...
January 18, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28095968/catathrenia-nocturnal-groaning-a-social-media-survey-and-state-of-the-art-review
#3
Jose Alonso, Macario Camacho, Dinesh K Chhetri, Christian Guilleminault, Soroush Zaghi
STUDY OBJECTIVES: Catathrenia is an underrecognized nocturnal vocalization phenomenon that can be a source of perplexity to patients, bed partners, and medical providers. Catathrenia is distinct from both sleep talking (a parasomnia with loud talking during sleep) and snoring (noise due to vibration of upper airway soft tissues related to variations in airway resistance). The objective of this review is to provide an evidence-based resource to help the practitioner reliably evaluate and manage patients with this condition...
January 11, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28095486/three-dimensional-assessment-of-temporomandibular-joint-using-mri-cbct-image-registration
#4
Mohammed A Q Al-Saleh, Kumaradevan Punithakumar, Manuel Lagravere, Pierre Boulanger, Jacob L Jaremko, Paul W Major
PURPOSE: To introduce a new approach to reconstruct a 3D model of the TMJ using magnetic resonance imaging (MRI) and cone-beam computed tomography (CBCT) registered images, and to evaluate the intra-examiner reproducibility values of reconstructing the 3D models of the TMJ. METHODS: MRI and CBCT images of five patients (10 TMJs) were obtained. Multiple MRIs and CBCT images were registered using a mutual information based algorithm. The articular disc, condylar head and glenoid fossa were segmented at two different occasions, at least one-week apart, by one investigator, and 3D models were reconstructed...
2017: PloS One
https://www.readbyqxmd.com/read/28094850/discriminating-solitary-cysts-from-soft-tissue-lesions-in-mammography-using-a-pretrained-deep-convolutional-neural-network
#5
Thijs Kooi, Bram van Ginneken, Nico Karssemeijer, Ard den Heeten
PURPOSE: It is estimated that 7% of women in the western world will develop palpable breast cysts in their lifetime. Even though cysts have been correlated with risk of developing breast cancer, many of them are benign and do not require follow-up. We develop a method to discriminate benign solitary cysts from malignant masses in digital mammography. We think a system like this can have merit in the clinic as a decision aid or complementary to specialised modalities. METHODS: We employ a deep Convolutional Neural Network (CNN) to classify cyst and mass patches...
January 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28094419/postoperative-computed-tomography-and-low-field-magnetic-resonance-imaging-findings-in-dogs-with-degenerative-lumbosacral-stenosis-treated-by-dorsal-laminectomy
#6
Martin Rapp, Charles J Ley, Kerstin Hansson, Lennart Sjöström
OBJECTIVES: To describe postoperative computed tomography (CT) and magnetic resonance imaging (MRI) findings in dogs with degenerative lumbosacral stenosis (DLSS) treated by dorsal laminectomy and partial discectomy. METHODS: Prospective clinical case study of dogs diagnosed with and treated for DLSS. Surgical and clinical findings were described. Computed tomography and low field MRI findings pre- and postoperatively were described and graded. Clinical, CT and MRI examinations were performed four to 18 months after surgery...
January 17, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28090117/generation-of-shear-waves-by-laser-in-soft-media-in-the-ablative-and-thermoelastic-regimes
#7
Pol Grasland-Mongrain, Yuankang Lu, Frederic Lesage, Stefan Catheline, Guy Cloutier
This article describes the generation of elastic shear waves in a soft medium using a laser beam. Our experiments show two different regimes depending on laser energy. Physical modeling of the underlying phenomena reveals a thermoelastic regime caused by a local dilatation resulting from temperature increase, and an ablative regime caused by a partial vaporization of the medium by the laser. Computed theoretical displacements are close to experimental measurements. A numerical study based on the physical modeling gives propagation patterns comparable to those generated experimentally...
November 28, 2016: Applied Physics Letters
https://www.readbyqxmd.com/read/28089191/object-shape-dependency-of-in-plane-resolution-for-iterative-reconstruction-of-computed-tomography
#8
Tadanori Takata, Katsuhiro Ichikawa, Wataru Mitsui, Hiroyuki Hayashi, Kaori Minehiro, Keita Sakuta, Haruka Nunome, Kousuke Matsubara, Hiroki Kawashima, Yukihiro Matsuura, Toshifumi Gabata
The present study aimed to investigate whether the in-plane resolution property of iterative reconstruction (IR) of computed tomography (CT) data is object shape-dependent by testing columnar shapes with diameters of 3, 7, and 10cm (circular edge method) and a cubic shape with 5-cm side lengths (linear edge method). For each shape, objects were constructed of acrylic (contrast in Hounsfield units [ΔHU]=120) as well as a soft tissue equivalent material (ΔHU=50). For each shape, we measured the modulation transfer functions (MTFs) of IR and filtered back projection (FBP) using two multi-slice CT scanners at scan doses of 5 and 10mGy...
January 11, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28086809/primary-mediastinal-clear-cell-sarcoma-a-case-report-and-review-of-the-literature
#9
Long Jin, Yuxia Sui, Haili Zhu, Zhizhong Chen, Shuguang Liu
BACKGROUND: Clear cell sarcoma (CCS) is a rare malignant soft-tissue neoplasm that displays melanocytic markers and exhibits striking histopathological features. The tumour has a predilection for the lower extremities and rarely presents in the mediastinum. CASE PRESENTATION: We present a case of primary mediastinal CCS in a 57-year-old man. Computer tomography (CT) revealed a 12 × 12 × 7.5 cm mass in the anterior mediastinum. Microscopically, the tumour mainly consisted of epithelioid cells with oval vesicular nuclei and eosinophilic cytoplasm...
January 13, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28080910/use-of-computed-tomography-for-investigation-of-rhinitis-and-sinusitis-in-a-greater-rhea-rhea-americana
#10
Anne M Meyer, Kristen Phair, Gary West
Sinusitis is a common finding in avian species; however, it presents unique treatment challenges in ratites. A 6-yr-old male greater rhea ( Rhea americana ) presented acutely with right infraorbital sinus swelling and chemosis. Oral antibiotics were prescribed based on bacterial culture results with incomplete resolution of clinical signs. A computed tomography scan of the skull demonstrated a mixed-density soft tissue mass with extensive destruction of the right nasal bone, hard palate, maxilla, and frontal bone...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28076010/foreign-bodies-on-lateral-neck-radiographs-in-adults-imaging-findings-and-common-pitfalls
#11
Alba Castán Senar, Laura E Dinu, José M Artigas, Raquel Larrosa, Ylenia Navarro, Elena Angulo
Foreign-body (FB) ingestion is less common in adults than in children, but still occurs. Diagnostic management of patients with suspected FB ingestion in emergency departments depends on FB type and location, both of which are related to the patient profile. In adults, fish and chicken bones are the most common FB types, and the oropharynx and cricopharyngeal muscle are the most common locations. Once accidentally swallowed, an FB may become lodged in the oropharynx, and in such cases indirect or fiberoptic laryngoscopy is the first clinical management option...
January 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28074876/scale-up-of-nature-s-tissue-weaving-algorithms-to-engineer-advanced-functional-materials
#12
Joanna L Ng, Lillian E Knothe, Renee M Whan, Ulf Knothe, Melissa L Knothe Tate
We are literally the stuff from which our tissue fabrics and their fibers are woven and spun. The arrangement of collagen, elastin and other structural proteins in space and time embodies our tissues and organs with amazing resilience and multifunctional smart properties. For example, the periosteum, a soft tissue sleeve that envelops all nonarticular bony surfaces of the body, comprises an inherently "smart" material that gives hard bones added strength under high impact loads. Yet a paucity of scalable bottom-up approaches stymies the harnessing of smart tissues' biological, mechanical and organizational detail to create advanced functional materials...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28074536/use-of-an-intravenous-sclerosing-foam-3-sodium-tetradecyl-sulfate-for-treatment-of-orbital-varix-in-a-dog
#13
Rebecca S Saunders, Brian A Scansen, Stephen S Jung, Hooman Khabiri, David A Wilkie
A 6-month-old intact male Standard Dachshund was referred for evaluation of a soft tissue swelling above the right eye. Examination of the right eye revealed mild lateral deviation of the globe, normal vision, and a dorsonasal soft tissue swelling. Examination of the posterior segment was normal. Dual-phase computed tomography angiography was consistent with an orbital varix of the angularis oculi and right dorsal external ophthalmic veins with no evidence of arterial involvement. Treatment involved fluoroscopically guided coil embolization of the venous outflow with nine platinum microcoils, followed by sclerotherapy of the varix using 1...
January 10, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28072829/predicting-the-metabolic-sites-by-flavin-containing-monooxygenase-on-drug-molecules-using-svm-classification-on-computed-quantum-mechanics-and-circular-fingerprints-molecular-descriptors
#14
Chien-Wei Fu, Thy-Hou Lin
As an important enzyme in Phase I drug metabolism, the flavin-containing monooxygenase (FMO) also metabolizes some xenobiotics with soft nucleophiles. The site of metabolism (SOM) on a molecule is the site where the metabolic reaction is exerted by an enzyme. Accurate prediction of SOMs on drug molecules will assist the search for drug leads during the optimization process. Here, some quantum mechanics features such as the condensed Fukui function and attributes from circular fingerprints (called Molprint2D) are computed and classified using the support vector machine (SVM) for predicting some potential SOMs on a series of drugs that can be metabolized by FMO enzymes...
2017: PloS One
https://www.readbyqxmd.com/read/28068241/chemotherapy-response-assessment-by-fdg-pet-ct-in-early-stage-classical-hodgkin-lymphoma-moving-beyond-the-five-point-deauville-score
#15
Sarah A Milgrom, Wenli Dong, Mani Akhtari, Grace L Smith, Chelsea C Pinnix, Osama Mawlawi, Eric Rohren, Naveen Garg, Hubert Chuang, Zeinab Abou Yehia, Jay P Reddy, Jillian R Gunther, Joseph D Khoury, Tina Suki, Eleanor M Osborne, Yasuhiro Oki, Michelle Fanale, Bouthaina S Dabaja
PURPOSE: In early-stage classical Hodgkin lymphoma, fluorodeoxyglucose positron emission tomography (PET)-computed tomography (CT) scans are performed routinely after chemotherapy, and the 5-point Deauville score is used to report the disease response. We hypothesized that other PET-CT parameters, considered in combination with Deauville score, would improve risk stratification. METHODS AND MATERIALS: Patients treated for stage I to II Hodgkin lymphoma from 2003 to 2013, who were aged ≥18 years and had analyzable PET-CT scans performed before and after chemotherapy, were eligible...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28065638/iterative-metal-artefact-reduction-in-ct-can-dedicated-algorithms-improve-image-quality-after-spinal-instrumentation
#16
J Aissa, C Thomas, L M Sawicki, J Caspers, P Kröpil, G Antoch, J Boos
AIM: To investigate the value of dedicated computed tomography (CT) iterative metal artefact reduction (iMAR) algorithms in patients after spinal instrumentation. MATERIALS AND METHODS: Post-surgical spinal CT images of 24 patients performed between March 2015 and July 2016 were retrospectively included. Images were reconstructed with standard weighted filtered back projection (WFBP) and with two dedicated iMAR algorithms (iMAR-Algo1, adjusted to spinal instrumentations and iMAR-Algo2, adjusted to large metallic hip implants) using a medium smooth kernel (B30f) and a sharp kernel (B70f)...
January 5, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28063453/does-the-configurational-entropy-of-polydisperse-particles-exist
#17
Misaki Ozawa, Ludovic Berthier
Classical particle systems characterized by continuous size polydispersity, such as colloidal materials, are not straightforwardly described using statistical mechanics, since fundamental issues may arise from particle distinguishability. Because the mixing entropy in such systems is divergent in the thermodynamic limit, we show that the configurational entropy estimated from standard computational approaches to characterize glassy states also diverges. This reasoning would suggest that polydisperse materials cannot undergo a glass transition, in contradiction to experiments...
January 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28063406/contemporary-imaging-of-incidentally-discovered-adrenal-masses
#18
REVIEW
Daniel J Wale, Ka Kit Wong, Benjamin L Viglianti, Domenico Rubello, Milton D Gross
Adrenal lesions are routinely encountered incidentally in clinical practice. Although most of these lesions are benign, malignancy needs to be excluded. Therefore, the initial clinical workup is to exclude aggressive characteristics suggesting malignancy and to identify characteristics predictive of the most common benign lesion, an adrenal adenoma. Predicting a benign adenoma using a variety of imaging modalities has been widely studied using unenhanced computed tomography (CT), contrast enhanced CT, and magnetic resonance (MR) imaging...
January 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28061849/do-size-shape-and-alignment-parameters-of-the-femoral-condyle-affect-the-trochlear-groove-tracking-a-morphometric-study-based-on-3d-computed-tomography-models-in-chinese-people
#19
Zhe Du, Shichang Chen, Mengning Yan, Bing Yue, Yiming Zeng, You Wang
BACKGROUND: Our study aimed to investigate whether geometrical features (size, shape, or alignment parameters) of the femoral condyle affect the morphology of the trochlear groove. METHODS: Computed tomography models of 195 femurs (97 and 98 knees from male and female subjects, respectively) were reconstructed into three-dimensional models and categorised into four types of trochlear groove morphology based on the position of the turning point in relation to the mechanical axis (types 45°, 60°, 75°, and 90°)...
January 6, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28056890/the-relationship-between-hours-of-sleep-screen-time-and-frequency-of-food-and-drink-consumption-in-spain%C3%A2-in%C3%A2-the-2011-and-2013-aladino-a-cross-sectional-study
#20
Napoleón Pérez-Farinós, Carmen Villar-Villalba, Ana María López Sobaler, María Ángeles Dal Re Saavedra, Aránzazu Aparicio, Sara Santos Sanz, Teresa Robledo de Dios, José Javier Castrodeza-Sanz, Rosa María Ortega Anta
BACKGROUND: The frequency of intake of food and beverages depends on a number of ill-defined behaviour patterns. The objectives of this study were to evaluate the effects of screen time and sleep duration on food consumption frequency, and to describe frequencies and types of food consumption according to BMI category and parents' level of education. METHODS: We studied 6287 and 2806 children drawn from the 2011 and 2013 cross-sectional ALADINO studies respectively...
January 6, 2017: BMC Public Health
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