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https://www.readbyqxmd.com/read/29168158/assessment-of-attenuation-correction-for-myocardial-pet-imaging-using-combined-pet-mri
#1
Martin Lyngby Lassen, Sazan Rasul, Dietrich Beitzke, Marie-Elisabeth Stelzmüller, Jacobo Cal-Gonzalez, Marcus Hacker, Thomas Beyer
OBJECTIVE: To evaluate the frequency of artifacts in MR-based attenuation correction (AC) maps and their impact on the quantitative accuracy of PET-based flow and metabolism measurements in a cohort of consecutive heart failure patients undergoing combined PET/MR imaging. METHODS: Myocardial viability studies were performed in 20 patients following a dual-tracer protocol involving the assessment of myocardial perfusion ((13)N-NH3: 813 ± 86 MBq) and metabolism ((18)F-FDG: 335 ± 38 MBq)...
November 22, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/29164364/highlights-on-mri-of-the-fetal-body
#2
REVIEW
Lucia Manganaro, Amanda Antonelli, Silvia Bernardo, Federica Capozza, Roberta Petrillo, Serena Satta, Valeria Vinci, Matteo Saldari, Francesca Maccioni, Laura Ballesio, Carlo Catalano
Fetal MRI is a level III diagnostic tool performed subsequently a level II prenatal ultrasound (US), in cases of inconclusive ultrasonographic diagnosis or when a further investigation is required to confirm or improve the diagnosis, to plan an appropriate pregnancy management. Fetal MRI plays an increasingly important role in the prenatal diagnosis of fetal neck, chest and abdominal malformations, even if its role has been amply demonstrated, especially, in the field of fetal CNS anomalies. Due to its multiparametricity and multiplanarity, MRI provides a detailed evaluation of the whole fetal respiratory, gastrointestinal and genitourinary systems, especially on T2-weighted (W) images, with a good tissue contrast resolution...
November 21, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/29162036/sorafenib-treatment-for-papillary-thyroid-carcinoma-with-diffuse-lung-metastases-in-a-child-with-autism-spectrum-disorder-a-case-report
#3
Yousuke Higuchi, Takayuki Motoki, Hisashi Ishida, Kiichiro Kanamitsu, Kana Washio, Takanori Oyama, Takuo Noda, Yasuko Tsurumaru, Ayumi Okada, Hirokazu Tsukahara, Akira Shimada
BACKGROUND: Pediatric papillary thyroid carcinoma frequently presents with lymph node involvement and distant metastases. Sorafenib, an oral multikinase inhibitor, has been used to treat radioactive iodine (RAI) therapy-refractory thyroid carcinoma in adults; however, pediatric experience is limited. Medical procedures and hospitalization for children with autism spectrum disorder may be challenging. CASE PRESENTATION: An 11-year-old boy with autism spectrum disorder and moderate intellectual impairment presented with dyspnea on exertion with thyroid carcinoma and diffuses lung metastases...
November 21, 2017: BMC Cancer
https://www.readbyqxmd.com/read/29157746/particle-filter-based-target-tracking-algorithm-for-magnetic-resonance-guided-respiratory-compensation-robustness-and-accuracy-assessment
#4
Alexandra E Bourque, Stéphane Bedwani, Jean-François Carrier, Cynthia Ménard, Pim Borman, Clemens Bos, Bas W Raaymakers, Nikolai Mickevicius, Eric Paulson, Rob H N Tijssen
PURPOSE: To assess overall robustness and accuracy of a modified particle filter-based tracking algorithm for magnetic resonance (MR)-guided radiation therapy treatments. METHODS AND MATERIALS: An improved particle filter-based tracking algorithm was implemented, which used a normalized cross-correlation function as the likelihood calculation. With a total of 5 healthy volunteers and 8 patients, the robustness of the algorithm was tested on 24 dynamic magnetic resonance imaging (MRI) time series with varying resolution, contrast, and signal-to-noise ratio...
October 12, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29157168/burkitt-non-hodgkin-lymphoma-presenting-with-mental-neuropathy-numb-chin-syndrome-in-an-hiv-positive-patient
#5
N Vora, H Haryee, J C Dickson, R F Miller
Mental nerve neuropathy is usually due to local trauma or dental causes, but may be a manifestation of malignancy. A patient with virologically controlled human immunodeficiency virus (HIV) infection presented with a 'numb chin' on the background of long-standing night sweats, malaise and weight loss, worsening respiratory symptoms, and lymphadenopathy. Burkitt non-Hodgkin lymphoma was diagnosed from histology of a lymph node. Imaging (magnetic resonance imaging and (18)fluorodeoxyglucose [FDG]-positron emission tomography-computed tomography [PET-CT]) showed abnormal intracranial enhancement of the right mandibular nerve and extensive (18)FDG-avid lymphadenopathy above and below the diaphragm, focal lesions in the spleen and within the right mandible...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/29156475/transient-severe-respiratory-motion-artifacts-after-application-of-gadoxetate-disodium-what-we-currently-know
#6
Lennart Well, Julius Matthias Weinrich, Gerhard Adam, Peter Bannas
Background Gadoxetate disodium is an intracellular contrast agent for magnetic resonance imaging (MRI) of the liver. Recent publications revealed that injection of gadoxetate disodium can lead to imaging artifacts due to transient severe motion (TSM) in the arterial phase of contrast-enhanced liver MRI. In this review we present and discuss published frequencies of TSM, contrast injection and image acquisition protocols, potential risk factors, and proposed strategies to avoid or minimize the effects of TSM...
November 20, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/29155867/spectrum-of-pathogen-and-model-specific-histopathologies-in-mouse-models-of-acute-pneumonia
#7
Kristina Dietert, Birgitt Gutbier, Sandra M Wienhold, Katrin Reppe, Xiaohui Jiang, Ling Yao, Catherine Chaput, Jan Naujoks, Markus Brack, Alexandra Kupke, Christin Peteranderl, Stephan Becker, Carolin von Lachner, Nelli Baal, Hortense Slevogt, Andreas C Hocke, Martin Witzenrath, Bastian Opitz, Susanne Herold, Holger Hackstein, Leif E Sander, Norbert Suttorp, Achim D Gruber
Pneumonia may be caused by a wide range of pathogens and is considered the most common infectious cause of death in humans. Murine acute lung infection models mirror human pathologies in many aspects and contribute to our understanding of the disease and the development of novel treatment strategies. Despite progress in other fields of tissue imaging, histopathology remains the most conclusive and practical read out tool for the descriptive and semiquantitative evaluation of mouse pneumonia and therapeutic interventions...
2017: PloS One
https://www.readbyqxmd.com/read/29154895/nonrigid-motion-compensation-in-compressed-sensing-reconstruction-of-cardiac-cine-mri
#8
Azar Tolouee, Javad Alirezaie, Paul Babyn
In this work, a robust nonrigid motion compensation approach, is applied to the compressed sensing reconstruction of dynamic cardiac cine MRI sequences. Respiratory and cardiac motion separation coupled with a registration algorithm is used to provide accurate reconstruction of dynamic cardiac images. The proposed scheme employs a variable splitting based optimization strategy to enable joint motion estimation along with reconstruction. We define the recovery as an energy minimization scheme utilizing an objective function that combines data consistency, spatial smoothness, and motion penalties...
November 14, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29150410/lung-function-in-early-adulthood-and-health-in-later-life-a-transgenerational-cohort-analysis
#9
Alvar Agustí, Guillaume Noell, Josep Brugada, Rosa Faner
BACKGROUND: Early life events can affect health in later life. We hypothesised that low lung function (FEV1 <80% predicted) in early adulthood (25-40 years) is associated with higher prevalence and earlier incidence of respiratory, cardiovascular, and metabolic abnormalities, and premature death. METHODS: In this cohort analysis, we tested this hypothesis using data from the Framingham Offspring Cohort (FOC) and validated our observations in CARDIA (an independent cohort) and GenIII (which includes the direct descendants of FOC participants)...
November 14, 2017: Lancet Respiratory Medicine
https://www.readbyqxmd.com/read/29149111/-bilateral-bronchopneumonia-due-to-rothia-mucilaginosa
#10
B De Escalante Yangüela, A Gracia Gutiérrez, B C Gracia Tello, V A Alastrué Del Castaño, E Bueno Juana, S Algárate Cajo
Rothia mucilaginosa (R. mucilaginosa), formerly named Stomatococcus mucilaginosus, is a facultatively anaerobic, encapsulated gram-positive coccus, which forms part of the normal oropharyngeal and is rarely considered to be a pathogen in immunocompetent patients, although it can produce, on rare occasions, serious infections like bacteremia, endocarditis and respiratory infections; such as pneumonia, pleural empyema or superinfection of bronchiectasis. We present the case of a 74-year-old male diagnosed with right basal pneumonia of torpid evolution with a poor initial response to different antibiotics, with clinical and radiological worsening and the appearance of bilateral bronchopneumonia with pseudonodular images...
November 17, 2017: Anales del Sistema Sanitario de Navarra
https://www.readbyqxmd.com/read/29148576/free-breathing-abdominal-mri-improved-by-repeated-k-t-subsampling-and-artifact-minimization-rekam
#11
Mei-Lan Chu, Hing-Chiu Chang, Hsiao-Wen Chung, Mustafa R Bashir, Jing Cai, Lei Zhang, Duohua Sun, Nan-Kuei Chen
PURPOSE: We report an approach, termed Repeated k-t-subsampling and artifact-minimization (ReKAM), for removing motion artifacts in free-breathing abdominal MRI. The method is particularly valuable for challenging patients who may not hold their breath for a long time or have irregular respiratory rate. METHODS: The ReKAM framework comprises one acquisition module and two reconstruction modules. A fast MRI sequence is used to repeatedly acquire multiple sets of k-t space data...
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29148213/dynamic-expiratory-ct-an-effective-non-invasive-diagnostic-exam-for-fragile-children-with-suspected-tracheo-bronchomalacia
#12
Nicola Ullmann, Aurelio Secinaro, Laura Menchini, Serena Caggiano, Elisabetta Verrillo, Teresa Pia Santangelo, Renato Cutrera, Paolo Tomà
BACKGROUND: Tracheobronchomalacia, defined as variable collapse of the airways, has been recognized as an important cause of respiratory morbidity but still widely underdiagnosed. Bronchoscopy is still considered as the gold standard, but numerous limitations are known, especially for fragile sick children. Moreover, information on parenchymal lung disease cannot be described. There is a real need for a reliable, non-invasive test to help detection of airway and parenchymal malformations in children, specifically when bronchoscopy cannot be performed...
November 17, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29145478/electrical-impedance-tomography-amplitudes-of-cardiac-related-impedance-changes-in-the-lung-are-highly-position-dependent
#13
Michael Graf, Thomas Riedel
BACKGROUND: Electrical impedance tomography (EIT) is used on the thorax to measure impedance changes due to the presence of air and blood in the lung. This experimental study was performed to investigate the effect of posture on cardiac and respiratory related impedance changes. METHODS: EIT measurements were performed on 14 healthy subjects in left-, right lateral, prone, supine and upright positions. Simultaneously, tidal volume was recorded with an ultrasonic flowmeter...
2017: PloS One
https://www.readbyqxmd.com/read/29145289/mercury-poisoning-through-intravenous-administration-two-case-reports-with-literature-review
#14
Qiuying Lu, Zilong Liu, Xiaorui Chen
RATIONALE: Metallic mercury poisoning through intravenous injection is rare, especially for a homicide attempt. Diagnosis and treatment of the disease are challenging. PATIENT CONCERNS: A 34-year-old male presented with pyrexia, chill, fatigue, body aches, and pain of the dorsal aspect of right foot. Another case is that of a 29-year-old male who committed suicide by injecting himself metallic mercury 15 g intravenously and presented with dizzy, dyspnea, fatigue, sweatiness, and waist soreness...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29143683/the-progression-of-heartworm-associated-respiratory-disease-hard-in-spf-cats-18%C3%A2-months-after-dirofilaria-immitis-infection
#15
A Ray Dillon, Bryon L Blagburn, Michael Tillson, William Brawner, Betsy Welles, Calvin Johnson, Russell Cattley, Pat Rynders, Sharron Barney
BACKGROUND: Heartworm-associated respiratory disease (HARD) in cats is induced by the arrival and death of immature adult Dirofilaria immitis in the pulmonary system and is indistinguishable from mature adult heartworm infection. METHODS: A controlled, blind research study investigated the long-term (18 months post infection, PI) consequences of the inflammatory response associated with the death of immature adult heartworms in cats. Three groups of cats, 10 per group, were infected with 100 third-stage (L3) larvae by subcutaneous injection...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29143661/heartworm-associated-respiratory-disease-hard-induced-by-immature-adult-dirofilaria-immitis-in-cats
#16
A Ray Dillon, Byron L Blagburn, Michael Tillson, William Brawner, Betsy Welles, Calvin Johnson, Russell Cattley, Pat Rynders, Sharron Barney
BACKGROUND: A controlled, blind research study was conducted to define the initial inflammatory response and lung damage associated with the death of immature adult Dirofilaria immitis in cats as compared with cats developing adult heartworm infections and cats on preventive medication. METHODS: Three groups of cats were utilized, 10 per group. All cats were infected with 100 third-stage (L3) larvae by subcutaneous injection. Group A cats were treated topically with selamectin (Revolution®; Zoetis) per label directions at 28 days post infection (PI) and once monthly for 8 months...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29143200/structural-and-perfusion-magnetic-resonance-imaging-of-the-lung-in-cystic-fibrosis
#17
Christina Amaxopoulou, Ralph Gnannt, Kai Higashigaito, Andreas Jung, Christian J Kellenberger
BACKGROUND: Because of its absence of ionising radiation and possibility for obtaining functional information, MRI is promising for assessing lung disease in children who require repetitive imaging for long-term follow-up. OBJECTIVE: To describe MRI findings in children with cystic fibrosis and evaluate semi-quantitative dynamic contrast-enhanced lung perfusion. MATERIALS AND METHODS: We retrospectively compared lung MRI in 25 children and young adults with cystic fibrosis (median age 3...
November 15, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/29142384/hypercapnic-respiratory-failure-in-case-of-chiari-1-5-malformation-case-report-and-review-of-the-literature
#18
Viralkumar M Vasani, Subhas Kanti Konar, S Satish
Type 2 respiratory failure is defined as hypercapnia associated with hypoxia. Chiari 1.5 is known as herniation of the cerebellar tonsils along with brain stem and fourth ventricle. We report a 35-year-old male who presented with acute hypercapnic respiratory failure (Type 2), without any preexisting neurological or respiratory abnormality. Analysis of blood gases in emergency revealed a pH of 7.12, pCO2 of 132 mmHg, and arterial oxygen tension of 118 mm Hg. He was intubated and ventilated. Magnetic resonance imaging brain revealed herniation of the cerebellar tonsils along with brain stem and fourth ventricle...
October 2017: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29132465/-application-of-flexible-bronchoscopy-in-children-with-respiratory-diseases
#19
Li-Ping Wang, Shou-Ping Chen, Yu-Ying Huang, Fang-Fang Qin, Wen Ou, Hong-Dong Liu, Xiao-Fang Deng, Lei Lou, Jing Tao, Yu-Xia Cui
OBJECTIVE: To investigate the significance of flexible bronchoscopy in children with respiratory diseases. METHODS: A retrospective analysis was performed for the clinical data of 80 children who were hospitalized due to respiratory diseases (including severe pneumonia, Mycoplasma pneumoniae pneumonia with atelectasis/lung consolidation/local emphysema, protracted pneumonia, coughing and wheezing of unknown cause, chronic cough of unknown cause, and laryngeal stridor) and who underwent flexible bronchoscopy/alveolar lavage...
November 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29131353/accelerated-nonrigid-motion-compensated-isotropic-3d-coronary-mr-angiography
#20
Teresa Correia, Gastão Cruz, Torben Schneider, René M Botnar, Claudia Prieto
PURPOSE: To develop an accelerated and nonrigid motion compensated technique for efficient isotropic 3D whole-heart coronary magnetic resonance angiography (CMRA) with Cartesian acquisition. METHODS: Highly efficient whole-heart 3D CMRA was achieved by combining image reconstruction from undersampled data using compressed sensing (CS) with a nonrigid motion compensation framework. Undersampled acquisition was performed using a variable-density Cartesian trajectory with radial order (VD-CAPR)...
November 13, 2017: Medical Physics
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