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https://www.readbyqxmd.com/read/28803216/3d-2d-registration-with-superabundant-vessel-reconstruction-for-cardiac-resynchronization-therapy
#1
Daniel Toth, Maria Panayiotou, Alexander Brost, Jonathan M Behar, Christopher A Rinaldi, Kawal S Rhode, Peter Mountney
A key component of image guided interventions is the registration of preoperative and intraoperative images. Classical registration approaches rely on cross-modality information; however, in modalities such as MRI and X-ray there may not be sufficient cross-modality information. This paper proposes a fundamentally different registration approach which uses adjacent anatomical structures with superabundant vessel reconstruction and dynamic outlier rejection. In the targeted clinical scenario of cardiac resynchronization therapy (CRT) delivery, preoperative, non contrast-enhanced, MRI is registered to intraoperative, contrasted X-ray fluoroscopy...
August 5, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28799836/erratum-reduction-in-adjacent-segment-degeneration-after-multilevel-posterior-lumbar-interbody-fusion-with-proximal-diam-implantation
#2
Kang Lu
No abstract text is available yet for this article.
August 11, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28799737/method-to-assemble-genomic-dna-fragments-or-genes-on-human-artificial-chromosome-with-regulated-kinetochore-using-a-multi-integrase-system
#3
Nicholas C O Lee, Jung-Hyun Kim, Nikolai Petrov, Hee-Sheung Lee, Hiroshi Masumoto, William C Earnshaw, Vladimir Larionov, Natalay Kouprina
The production of cells capable of carrying multiple transgenes to Mb-size genomic loci has multiple applications in biomedicine and biotechnology. In order to achieve this goal, three key steps are required: i) Cloning of large genomic segments; ii) Insertion of multiple DNA blocks at a precise location and iii) The capability to eliminate the assembled region from cells. In this study, we designed the Iterative Integration System (IIS) that utilizes recombinases Cre, ΦC31 and ΦBT1, and combined it with Human Artificial Chromosome (HAC) possessing a regulated kinetochore (alphoid(tetO)-HAC)...
August 11, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28797605/space-available-for-cord-motion-and-disc-degeneration-at-the-adjacent-segments-level-of-degenerative-cervical-spondylolisthesis-using-kinematic-mri
#4
Permsak Paholpak, Alexander Nazareth, Kaku Barkoh, Larry V Lee, Joshua Lucas, Zorica Buser, Jeffrey C Wang
The objective was to evaluate motion, disc degeneration and Space Available for Cord (SAC) at the adjacent segments of degenerative cervical spondylolisthesis (DCS) using kinematic Magnetic Resonance Imaging (kMRI). The cervical spine kMRI of sixty-one DCS spinal levels (38 anterolisthesis and 23 retrolisthesis) were analyzed at the listhesis level and its adjacent segments in three position using kMRI. MRAnalyzer3 was used to analyze translation, angular motion and SAC. The caudad level had significantly less translation motion than the listhesis level in overall DCS or grade 2 anterolisthesis group (P<0...
August 7, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28796075/muscle-gap-approach-under-a-minimally-invasive-channel-technique-for-treating-long-segmental-lumbar-spinal-stenosis-a-retrospective-study
#5
Yang Bin, Wang De Cheng, Wang Zong Wei, Li Hui
This study aimed to compare the efficacy of muscle gap approach under a minimally invasive channel surgical technique with the traditional median approach.In the Orthopedics Department of Traditional Chinese and Western Medicine Hospital, Tongzhou District, Beijing, 68 cases of lumbar spinal canal stenosis underwent surgery using the muscle gap approach under a minimally invasive channel technique and a median approach between September 2013 and February 2016. Both approaches adopted lumbar spinal canal decompression, intervertebral disk removal, cage implantation, and pedicle screw fixation...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28774443/enhanced-particle-filtering-framework-for-vessel-segmentation-and-tracking
#6
Sang-Hoon Lee, Jiwoo Kang, Sanghoon Lee
BACKGROUND AND OBJECTIVES: A robust vessel segmentation and tracking method based on a particle-filtering framework is proposed to cope with increasing demand for a method that can detect and track vessel anomalies. METHODS: We apply the level set method to segment the vessel boundary and a particle filter to track the position and shape variations in the vessel boundary between two adjacent slices. To enhance the segmentation and tracking performances, the importance density of the particle filter is localized by estimating the translation of an object's boundary...
September 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28767625/patient-reported-outcomes-and-costs-associated-with-revision-surgery-for-degenerative-cervical-spine-diseases
#7
Elliott J Kim, Silky Chotai, Joseph B Wick, David P Stonko, Ahilan Sivaganesan, Clinton J Devin
STUDY DESIGN: Retrospective review of a prospective database. OBJECTIVE: Determine cost and outcomes of revision cervical spine surgery. SUMMARY OF BACKGROUND DATA: Revision rates for cervical spine surgery are steadily increasing. It is important to counsel patients on expected results following a revision procedure. However, outcomes and cost of these procedures are poorly defined in the literature. METHODS: Patients undergoing revision cervical spine surgery at a single institution were included between October 2010 and January 2016 in a prospective registry database...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28760542/how-to-avoid-false-positive-hyperdense-middle-cerebral-artery-sign-detection-in-ischemic-stroke
#8
Robert Chrzan, Agnieszka Gleń, Andrzej Urbanik
OBJECTIVES: The aim of the study was to find how to differentiate hyperdense middle cerebral artery sign (HMCAS) in stroke patients from asymmetric hyperdensity not related to stroke, by comparison of the CT density values typical for HMCAS to the values in normal or atherosclerotic middle cerebral artery (MCA). METHODS: The group analyzed consisted of 100 patients with ischemic stroke, presenting HMCAS on the admission CT. Density measurements in HU were performed in the hyperdense segment of the involved MCA, contralateral MCA, brain cortex adjacent to the hyperdense MCA...
July 25, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28760469/delayed-electroanatomic-mapping-after-surgical-ablation-for-persistent-atrial-fibrillation
#9
Alan Bulava, Ales Mokracek, Vojtech Kurfirst
BACKGROUND: Long-term efficacy of catheter-based treatment of persistent atrial fibrillation is unsatisfactory. Minimally invasive surgical ablation techniques have been developed recently but their true efficacy has never been systematically tested. METHODS: Seventy patients (median age 63.5 years) with persistent atrial fibrillation underwent epicardial thoracoscopic radiofrequency pulmonary vein (PV) isolation, linear ablation, Marshal ligament disruption, and exclusion of the left atrial appendage...
July 29, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28760034/complete-anatomic-reduction-and-monosegmental-fusion-for-lumbar-spondylolisthesis-of-grade-ii-and-higher-use-of-the-minimally-invasive-rocking-technique
#10
Deshpande V Rajakumar, Akshay Hari, Murali Krishna, Ankit Sharma, Manjunatha Reddy
OBJECTIVE Different surgical approaches have been described for treatment of spondylolisthesis, including in situ fusions, reductions of various degrees, and inclusion of healthy adjacent segments into the fusion construct. To the authors' knowledge, there are only sparse reports describing consistent complete reduction and monosegmental transforaminal lumbar interbody fusion for spondylolisthesis using a minimally invasive technique. The authors assess the efficacy of this technique in the reduction of local deformity and correction of overall sagittal profile in single-level spondylolisthesis...
August 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28759083/a-rare-cause-of-early-repolarisation-in-an-adolescent-boy-with-chest-pain-myocardial-bridging
#11
Murat Deveci, Kadir Babaoğlu, Özlem Kayabey
Early repolarisation is a common electrocardiographic (ECG) finding characterised by J-point and ST segment elevation ≥ 0.1 mV in two or more adjacent leads. The ECG pattern of early repolarisation is relatively common in asymptomatic subjects. Early repolarisation pattern may be seen in secondary conditions such as hypothermia, autonomic nervous system disturbances, cocaine abuse, hypercalcaemia and myocardial ischaemia. We present a case of an adolescent boy with chest pain and concurrent ST-segment elevation...
May 23, 2017: Cardiovascular Journal of Africa
https://www.readbyqxmd.com/read/28752156/accounting-for-the-confound-of-meninges-in-segmenting-entorhinal-and-perirhinal-cortices-in-t1-weighted-mri
#12
Long Xie, Laura E M Wisse, Sandhitsu R Das, Hongzhi Wang, David A Wolk, Jose V Manjón, Paul A Yushkevich
Quantification of medial temporal lobe (MTL) cortices, including entorhinal cortex (ERC) and perirhinal cortex (PRC), from in vivo MRI is desirable for studying the human memory system as well as in early diagnosis and monitoring of Alzheimer's disease. However, ERC and PRC are commonly over-segmented in T1-weighted (T1w) MRI because of the adjacent meninges that have similar intensity to gray matter in T1 contrast. This introduces errors in the quantification and could potentially confound imaging studies of ERC/PRC...
October 2016: Medical Image Computing and Computer-assisted Intervention: MICCAI ..
https://www.readbyqxmd.com/read/28747794/visual-perception-in-dyslexia-is-limited-by-sub-optimal-scale-selection
#13
Richard Johnston, Nicola J Pitchford, Neil W Roach, Timothy Ledgeway
Readers with dyslexia are purported to have a selective visual impairment but the underlying nature of the deficit remains elusive. Here, we used a combination of behavioural psychophysics and biologically-motivated computational modeling to investigate if this deficit extends to object segmentation, a process implicated in visual word form recognition. Thirty-eight adults with a wide range of reading abilities were shown random-dot displays spatially divided into horizontal segments. Adjacent segments contained either local motion signals in opposing directions or analogous static form cues depicting orthogonal orientations...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28746123/a-change-in-lumbar-sagittal-alignment-after-single-level-anterior-lumbar-interbody-fusion-for-lumbar-degenerative-spondylolisthesis-with-normal-sagittal-balance
#14
Chi Heon Kim, Chun Kee Chung, Sung Bae Park, Seung Heon Yang, Jung-Hee Kim
STUDY DESIGN: Retrospective analysis. OBJECTIVE: The object is to assess the correlation between whole lumbar lordosis (LL) and the segmental angle (SA) after single-level anterior lumbar interbody fusion for degenerative lumbar spondylolisthesis. SUMMARY OF BACKGROUND DATA: The restoration of the SA at lower lumbar spine is meaningful, considering it contributes approximately 60% of LL, and revision surgery due to flat back or adjacent segment pathology was necessary decades after the initial surgery...
August 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28740681/a-segmental-labeling-technique-for-non-intubated-thoracoscopic-anatomical-segmentectomy
#15
Miao Zhang, Tao Wang, Heng Wang
Herein we present a method of pulmonary segmental labeling for non-intubated thoracoscopic segmentectomy assisted with artificial pneumothorax, which is assumed to obtain a significant colored inflation-deflation line between target segment and adjacent normal tissues for precise resection.
June 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28740468/evolution-of-precision-medicine-and-surgical-strategies-for-bicuspid-aortic-valve-associated-aortopathy
#16
Ali Fatehi Hassanabad, Alex J Barker, David Guzzardi, Michael Markl, Chris Malaisrie, Patrick M McCarthy, Paul W M Fedak
Bicuspid aortic valve (BAV) is a common congenital cardiac malformation affecting 1-2% of people. BAV results from fusion of two adjacent aortic valve cusps, and is associated with dilatation of the aorta, known as bicuspid valve associated aortopathy. Bicuspid valve aortopathy is progressive and associated with catastrophic clinical events, such as aortic dissection and rupture. Therefore, frequent monitoring and early intervention with prophylactic surgical resection of the proximal aorta is often recommended...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28736374/-low-cement-distribution-index-is-a-risk-factor-for-refracture-of-the-adjacent-segments-after-percutaneous-vertebroplasty
#17
Zhao-Zong Fu, Zhong-Xian Chen, Ying Qin, Zhi-Qiang Feng, Xiong-Jian Jiang, Qing-Hua Xie, Yi-Tao Liu
OBJECTIVE: To investigate the impact of cement distribution index on the occurrence of refracture in the adjacent segments after percutaneous vertebroplasty. METHODS: This retrospective analysis was conducted among 143 patients who received percutaneous vertebroplasty for osteoporotic vertebral compression fracture between April, 2011 and April, 2014. Of the 134 patients with complete follow-up data, 18 had adjacent segment fracture within 1 year following the surgeries (re-fracture group), and 116 patients without new fracture served as the control group...
July 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28734913/uncovered-culprit-plaque-ruptures-in-patients-with-st-segment-elevation-myocardial-infarction-assessed-by-optical-coherence-tomography-and-intravascular-ultrasound-with-imap
#18
Mikkel Hougaard, Henrik Steen Hansen, Per Thayssen, Lisbeth Antonsen, Lisette Okkels Jensen
OBJECTIVES: This study assessed the incidence and course of healing of uncovered plaque ruptures (PR) following primary percutaneous coronary intervention. BACKGROUND: The infarct-related occlusion is frequently located at the lesion site with maximum thrombus burden, whereas the culprit PR may be situated more proximally or distally. METHODS: Uncovered PR in segments adjacent to the stent were identified by optical coherence tomography and intravascular ultrasound using iMap (Boston Scientific, Marlborough, Massachusetts) within 48 h and after 12 months...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28734911/plaque-rupture-in-coronary-atherosclerosis-is-associated-with-increased-plaque-structural-stress
#19
Charis Costopoulos, Yuan Huang, Adam J Brown, Patrick A Calvert, Stephen P Hoole, Nick E J West, Jonathan H Gillard, Zhongzhao Teng, Martin R Bennett
OBJECTIVES: The aim of this study was to identify the determinants of plaque structural stress (PSS) and the relationship between PSS and plaques with rupture. BACKGROUND: Plaque rupture is the most common cause of myocardial infarction, occurring particularly in higher risk lesions such as fibroatheromas. However, prospective intravascular ultrasound-virtual histology studies indicate that <10% higher risk plaques cause clinical events over 3 years, indicating that other factors also determine plaque rupture...
July 13, 2017: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28733222/molecular-classification-of-hepatocellular-adenoma-in-clinical-practice
#20
REVIEW
Jean-Charles Nault, Valérie Paradis, Daniel Cherqui, Valérie Vilgrain, Jessica Zucman-Rossi
Incidental liver lesion depicted on preoperative imaging for bariatric surgery (BMI = 42) in a 34 year-old woman with oral contraceptive use of 15 years, normal blood liver tests and high CRP (11 mg/L, Nl <6). MRI showed a 6 cm liver nodule in segment V close to the gallbladder. The nodule was moderately hyperintense on T1 (in-phase) and showed a marked and heterogeneous drop in signal intensity on opposedphase sequence suggesting the presence of fat. On T2, the nodule was heterogeneous, hyperintense at the periphery and hypointense in most of the central part...
July 18, 2017: Journal of Hepatology
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