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https://www.readbyqxmd.com/read/28817821/endoscopic-lung-volume-reduction-an-expert-panel-recommendation-update-2017
#1
Felix J F Herth, Dirk-Jan Slebos, Gerard J Criner, Pallav L Shah
Interest in endoscopic lung volume reduction (ELVR) technologies for emphysema is consistently growing. In the last couple of months, several endoscopic options (e.g., endo- or intrabronchial valves, coil implants, and thermal vapor ablation) that have been evaluated in randomized controlled trials have been reported with the ultimate goal of improving respiratory mechanics and alleviating chronic dyspnea. Patients presenting with severe air trapping and thoracic hyperinflation have the greatest potential to derive benefit from ELVR procedures...
August 18, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28817818/computed-tomography-the-better-pulmonologist
#2
Felix J F Herth, Maren Schuhmann
No abstract text is available yet for this article.
August 18, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28817814/cardiac-computed-tomography-angiographic-findings-as-predictors-of-late-heart-failure-in-an-asymptomatic-diabetic-cohort-an-8-year-prospective-follow-up-study
#3
David A Halon, Jubran Ayman, Ronen Rubinshtein, Barak Zafrir, Mali Azencot, Basil S Lewis
OBJECTIVES: Predictive models for heart failure (HF) in heterogeneous populations have had limited success. We examined cardiac computed tomography angiography (CTA) predictors of HF or cardiovascular death (HF-CVD) in a prospective study of asymptomatic diabetics undergoing baseline assessment by CTA. METHODS: The subjects (n = 735, aged 55-74 years, 51.2% women) had no clinical history of cardiovascular disease at study entry. Coronary artery calcium (CAC) score, CTA-defined coronary atherosclerosis, cardiac chamber volumes, and clinical data were collected and late outcome events recorded over 8...
August 18, 2017: Cardiology
https://www.readbyqxmd.com/read/28817739/three-dimensional-volumetric-changes-in-severely-resorbed-alveolar-sockets-after-ridge-augmentation-with-bovine-derived-xenograft-and-resorbable-barrier-a-preliminary-study-on-cbct-imaging
#4
Valeria Manavella, Federica Romano, Lisa Corano, Cristina Bignardi, Mario Aimetti
PURPOSE: The primary aim of the study was to describe a novel technique to evaluate volumetric hard tissue dimensional changes after ridge augmentation procedures. The secondary aim was to apply this newly developed measuring method to compromised alveolar sockets grafted with a slowly resorbing biomaterial covered with a collagen membrane. MATERIALS AND METHODS: Eleven patients (6 men and 5 women, mean age 52.7 ± 8.3 years) requiring extraction of one hopeless tooth for severe periodontitis in the maxillary anterior area were consecutively treated with a ridge augmentation procedure...
August 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28817729/comparison-of-bioimpedance-spectroscopy-and-x-ray-micro-computed-tomography-for-total-fat-volume-measurement-in-mice
#5
Gaelle Aubertin, Amira Sayeh, Jean-Philippe Dillenseger, Estelle Ayme-Dietrich, Philippe Choquet, Nathalie Niederhoffer
Obesity and the metabolic syndrome are two pathologies whose prevalence are in a constant increase. Evaluation of the total fat mass but also of the distribution between visceral and subcutaneous adipose tissue are important factors while assessing the pathophysiology of these two pathologies. Computed tomography (CT) and bioimpedance (BIS) are the translational methods the most frequently used in human beings as well as in rodent models in longitudinal studies on adiposity and obesity. Surprisingly, no direct comparison of micro-CT and BIS was reported yet in mice...
2017: PloS One
https://www.readbyqxmd.com/read/28817662/single-scan-rest-stress-imaging-with-99mtc-sestamibi-and-cadmium-zinc-telluride-based-spect-for-hyperemic-flow-quantification-a-feasibility-study-evaluated-with-cardiac-magnetic-resonance-imaging
#6
Yu-Hua Dean Fang, Yuan-Chang Liu, Kung-Chu Ho, Feng-Cheng Kuo, Ching-Fang Yang, Tzu-Chen Yen, I-Chang Hsieh
INTRODUCTION: We aimed to evaluate whether the hyperemic myocardial blood flow (MBF) can be estimated using cadmium zinc telluride (CZT)-based single-photon emission computed tomography (SPECT) cameras with a single, rapid rest/stress dynamic scan. Dynamic contrast-enhanced (DCE) cardiac magnetic resonance imaging (MRI) was used as a reference modality for flow measurement. MATERIALS AND METHODS: The proposed protocol included both the rest and stress acquisitions within a 24-min scan...
2017: PloS One
https://www.readbyqxmd.com/read/28817595/predictive-factors-of-the-dimensions-and-location-of-mental-foramen-using-cone-beam-computed-tomography
#7
Juan Muinelo-Lorenzo, Ana Fernández-Alonso, Ernesto Smyth-Chamosa, Juan Antonio Suárez-Quintanilla, Jesús Varela-Mallou, María Mercedes Suárez-Cunqueiro
OBJECTIVE: The mental foramen (MF) hosts main neurovascular structures, making it of crucial importance for surgical procedures. This study aimed to analyze the factors influencing the dimensions and location of the MF. MATERIALS AND METHODS: Cone beam computed tomography (CBCT) scans of 344 patients were examined for MF dimensions, as well as for the distances from the MF to the alveolar crest (MF-MSB), and to the inferior mandibular border (MF-MIB). RESULTS: Gender, mandibular side and presence of accessory mental foramina (AMF) significantly influence MF area...
2017: PloS One
https://www.readbyqxmd.com/read/28817459/relation-between-epicardial-fat-and-subclinical-atherosclerosis-in-asymptomatic-individuals
#8
Rami M Abazid, Osama A Smettei, Mohammad Obadah Kattea, Sawsan Sayed, Hanaa Saqqah, Adel M Widyan, Maksymilian P Opolski
PURPOSE: Excessive quantity of epicardial adipose tissue (EAT) is considered a risk factor for coronary artery disease (CAD). There are limited data, however, on the relationship between the quality of EAT and CAD. We investigated the association between the density and volume of EAT and subclinical CAD defined by positive coronary artery calcification (CAC), using computed tomography (CT). MATERIALS AND METHODS: We reviewed 609 consecutive CT scans of patients with a mild to moderate risk for CAD to assess the EAT volume, which was measured manually by tracing the parietal pericardial sac on axial images...
August 16, 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28817393/increased-expiratory-computed-tomography-density-reveals-possible-abnormalities-in-radiologically-preserved-lung-parenchyma-in-idiopathic-pulmonary-fibrosis
#9
Valentina Petroulia, Manuela Funke, Pascal Zumstein, Sabina Berezowska, Lukas Ebner, Thomas Geiser, Nenad Torbica, Johannes Heverhagen, Alexander Poellinger
OBJECTIVES: Idiopathic pulmonary fibrosis (IPF) is a progressive lethal chronic lung disease with unclear pathogenesis. Radiological hallmark is the pattern of usual interstitial pneumonia accentuated in peripheral and basal areas with otherwise preserved lung structure. One hypothesis is that alveolar collapse and consequent induration lead to fibrotic transformation of lung tissue. The aim of the study was to investigate normal-appearing tissue during expiration for signs of collapsibility and differences from other diseases or controls...
August 16, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28817381/advanced-radiation-dosimetry-phantom-ardos-a-versatile-breathing-phantom-for-4d-radiation-therapy-and-medical-imaging
#10
Natalia Kostiukhina, Dietmar Georg, Sofia Rollet, Peter Kuess, Andrej Sipaj, Piotr Andrzejewski, Hugo Furtado, Ivo Rausch, Wolfgang Lechner, Elisabeth Steiner, Hunor Kertesz, Barbara Knaeusl
A novel breathing phantom was designed for being used in conventional and ion-beam radiotherapy as well as for medical imaging. Accurate dose delivery and patient safety are aimed to be verified for four-dimensional (4D) treatment techniques compensating for breathing-induced tumor motion. The phantom includes anthropomorphic components representing an average human thorax. It consists of real tissue equivalent materials to fulfill the requirements for dosimetric experiments and imaging purposes. The different parts of the torso (lungs, chest wall, and ribs) and the tumor can move independently...
August 17, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28817162/determining-when-it-is-safe-to-remove-the-external-fixator-results-from-a-survey-of-the-limb-lengthening-and-reconstruction-society
#11
Christopher A Iobst, Waleed Mohammed, Ryan Colley
Thousands of external fixators are applied for distraction osteogenesis each year. Determining when it is safe to remove the fixator can be difficult. The purpose of this study was to survey an international group of external fixation surgeons to determine their current practice patterns surrounding external fixator removal. A 10-question, open-ended survey was emailed to members of the Limb Lengthening and Reconstruction Society. Responses were recorded, and statistical analysis was performed. Pearson's chi-square test and likelihood ratio were used when indicated...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28817158/characteristics-and-efficacy-of-a-new-3-dimensional-printed-mesh-structure-titanium-alloy-spacer-for-posterior-lumbar-interbody-fusion
#12
Sung-Soo Chung, Kyung-Joon Lee, Yoo-Beom Kwon, Kyung-Chung Kang
This study evaluated the characteristics of a newly developed 3-dimensional printed mesh structure titanium spacer and its efficacy for posterior lumbar interbody fusion. Posterior lumbar interbody fusion with this spacer was performed at 53 segments (40 patients; mean age, 64 years; range, 51-73 years). Data were collected prospectively. Radiographic characteristics were analyzed with changes in interbody height, instability of the segments, formation of bone bridges around the implants, and pseudarthrosis, as determined by dynamic radiographs and postoperative computed tomography scans...
August 17, 2017: Orthopedics
https://www.readbyqxmd.com/read/28817142/morphologic-patterns-of-the-atrophic-posterior-maxilla-and-clinical-implications-for-bone-regenerative-therapy
#13
Alberto Monje, Istvan A Urban, Richard J Miron, Jordi Caballe-Serrano, Daniel Buser, Hom-Lay Wang
Regenerative therapies are commonly needed prior to implant placement in the posterior maxilla following tooth extraction. The aim of this study was to investigate the anatomical features of the atrophic posterior maxilla that might affect surgical approach selection and technique and risk of intra- and postoperative complications. Cone beam computed tomography files were screened to identify pristine atrophic maxillary ridges in need of bone augmentation (ridge height < 10 mm). Ridge height and width and lateral wall thickness (LWT) were measured at different levels, and palatonasal recess and lateral wall morphology were calculated...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28817134/dimensional-change-and-microstructure-of-intraoral-bone-block-grafts-covered-with-platelet-rich-fibrin-and-a-barrier-membrane-in-ridge-augmentation-a-pilot-investigation
#14
Prisana Pripatnanont, Phetsamone Thanakone, Narit Leepong
This study investigated the dimensional change and microstructure of intraoral bone block grafts covered with platelet-rich fibrin (PRF) and a barrier membrane in ridge augmentation. Seven patients were included, with 18 implant sites (10 ramus and 8 symphysis). The average final ridge width gains in the ramus from cast-based measurement (3.86 ± 0.87 mm) and cone beam computed tomography measurements (3.63 ± 1.38 mm) were not different from the symphysis (3.36 ± 2.26 mm and 3.44 ± 1.52 mm, respectively)...
September 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28816991/a-case-report-of-tracheal-inflammatory-myofibroblastic-tumor-in-a-34-week-pregnant-woman-misdiagnosed-with-asthma
#15
Xiaochen Li, Juan Li, Xiaoling Rao, Qilin Ao, Xiaopei Cao, Yali Huang, Shengding Zhang, Xiaoyu Fang, Xiansheng Liu, Min Xie
RATIONALE: Inflammatory myofibroblastic tumor (IMT) is an uncommon neoplastic entity with a tendency of local recurrence and a low risk of distant metastasis. Involvement of trachea is extremely rare. PATIENT CONCERNS: A 34-week pregnant woman previously diagnosed with asthma for 2 months was admitted with persistent wheezing and hemoptysis. A computed tomography scan and bronchoscopy revealed a gigantic polyp in the trachea. DIAGNOSES: Tracheal inflammatory myofibroblastic tumor...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816978/prognostic-value-of-18f-fdg-pet-ct-parameters-in-patients-with-pancreatic-carcinoma-a-systematic-review-and-meta-analysis
#16
Dongyong Zhu, Lisha Wang, Hanfei Zhang, Jie Chen, Yanfang Wang, Sama Byanju, Meiyan Liao
BACKGROUND: The identification of pancreatic carcinoma (PC) patients with poor prognosis is a priority in clinical oncology because of their high 5-year mortality. However, the prognostic value of pretreatment F-fluorodeoxyglucose (F-FDG)- positron emission tomography (PET)/computed tomography (CT) parameters in PC patients is controversial and no consensus exists as to its predictive capability. This meta-analysis was performed to comprehensively explore the prognostic significance of F-FDG-PET/CT parameters in patients with pancreatic carcinoma...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816957/value-and-impact-factors-of-multidetector-computed-tomography-in-diagnosis-of-preoperative-lymph-node-metastasis-in-gastric-cancer-a-prisma-compliant-systematic-review-and-meta-analysis
#17
Mingxu Luo, You Lv, Xiuyu Guo, Hongmei Song, Guoqiang Su, Bo Chen
BACKGROUND: Multidetector computed tomography (MDCT) exhibited wide ranges of sensitivities and specificities for lymph node assessment of gastric cancer (GC) in several individual studies. This present meta-analysis was carried out to evaluate the value of MDCT in diagnosis of preoperative lymph node metastasis (LNM) and to explore the impact factors that might explain the heterogeneity of its diagnostic accuracy in GC. METHODS: A comprehensive search was conducted to collect all the relevant studies about the value of MDCT in assessing LNM of GC within the PubMed, Cochrane library and Embase databases up to Feb 2, 2016...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816935/perimesencephalic-nonaneurysmal-subarachnoid-hemorrhage-caused-by-transverse-sinus-thrombosis-a-case-report-and-review-of-literature
#18
Fang-Wang Fu, Jie Rao, Yuan-Yuan Zheng, Liang Song, Wei Chen, Qi-Hui Zhou, Jian-Guang Yang, Jiang-Qiong Ke, Guo-Qing Zheng
RATIONALE: Perimesencephalic nonaneurysmal subarachnoid hemorrhage (PNSAH) is characterized by a pattern of extravasated blood restricted to the perimesencephalic cisterns, normal angiographic findings, and an excellent prognosis with an uneventful course and low risks of complication. The precise etiology of bleeding in patients with PNSAH has not yet been established. The most common hypothesis is that PNSAH is venous in origin. Intracranial venous hypertension has been considered as the pivotal factor in the pathogenesis of PNSAH...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28816897/surgical-correction-of-cam-deformity-in-association-with-femoroacetabular-impingement-and-its-impact-on-the-degenerative-process-within-the-hip-joint
#19
Paul E Beaulé, Andrew D Speirs, Helen Anwander, Gerd Melkus, Kawan Rakhra, Hanspeter Frei, Mario Lamontagne
BACKGROUND: Cam morphology in association with femoroacetabular impingement (FAI) is a recognized cause of hip pain and cartilage damage and proposed as a leading cause of arthritis. The purpose of this study was to analyze the functional and biomechanical effects of the surgical correction of the cam deformity on the degenerative process associated with FAI. METHODS: Ten male patients with a mean age of 34.3 years (range, 23.1 to 46.5 years) and a mean body mass index (and standard deviation) of 26...
August 16, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28816891/computed-tomography-use-plateaus-among-children-with-emergency-visits-for-abdominal-pain
#20
Jahan Fahimi, Aaron E Kornblith, Hemal Kanzaria, Andrew Herring, Ralph C Wang
OBJECTIVES: Abdominal pain is a common pediatric complaint to emergency departments (EDs), and clinicians often rely on imaging for diagnosis. Studies have demonstrated an increase in computed tomography (CT) in this population. Following emphasis on radiation reduction by researchers and organizations, this study evaluates recent national trends in CT use among pediatric patients presenting to EDs with abdominal pain. METHODS: This is a cross-sectional analysis of ED patients 18 years or younger with chief complaint of abdominal pain in the National Hospital Ambulatory Medical Care Survey from 2008 to 2011...
August 14, 2017: Pediatric Emergency Care
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