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Visceral segmentation

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https://www.readbyqxmd.com/read/28535911/validation-of-a-free-software-for-unsupervised-assessment-of-abdominal-fat-in-mri
#1
Michele Maddalo, Ivan Zorza, Stefano Zubani, Giorgio Nocivelli, Giulio Calandra, Pierantonio Soldini, Lorella Mascaro, Roberto Maroldi
PURPOSE: To demonstrate the accuracy of an unsupervised (fully automated) software for fat segmentation in magnetic resonance imaging. The proposed software is a freeware solution developed in ImageJ that enables the quantification of metabolically different adipose tissues in large cohort studies. METHODS: The lumbar part of the abdomen (19cm in craniocaudal direction, centered in L3) of eleven healthy volunteers (age range: 21-46years, BMI range: 21.7-31.6kg/m(2)) was examined in a breath hold on expiration with a GE T1 Dixon sequence...
May 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28506502/autonomic-dysreflexia-after-spinal-cord-injury-systemic-pathophysiology-and-methods-of-management
#2
REVIEW
Khalid C Eldahan, Alexander G Rabchevsky
Traumatic spinal cord injury (SCI) has widespread physiological effects beyond the disruption of sensory and motor function, notably the loss of normal autonomic and cardiovascular control. Injury at or above the sixth thoracic spinal cord segment segregates critical spinal sympathetic neurons from supraspinal modulation which can result in a syndrome known as autonomic dysreflexia (AD). AD is defined as episodic hypertension and concomitant baroreflex-mediated bradycardia initiated by unmodulated sympathetic reflexes in the decentralized cord...
May 8, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28501661/extensive-cerebrovascular-and-visceral-artery-dissection-and-pseudoaneurysm-with-underlying-segmental-arterial-mediolysis
#3
Abhishek Sethi, Jonathan R Hyde, Christina M Thaler, Nedaa Skeik
Segmental arterial mediolysis (SAM) is a non-atherosclerotic, non-hereditary vasculopathy that most commonly involves abdominal aortic branches and predominantly affects middle-age and elderly populations. Lysis of the outer arterial media results in separation of the media from the adventitia leading to dissecting aneurysms and/or pseudoaneurysms. We report a unique case of a 47-year-old man who presented with bilateral internal carotid artery dissection followed by dissections and aneurysms involving multiple visceral arteries...
May 10, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28495009/a-two-step-convolutional-neural-network-based-computer-aided-detection-scheme-for-automatically-segmenting-adipose-tissue-volume-depicting-on-ct-images
#4
Yunzhi Wang, Yuchen Qiu, Theresa Thai, Kathleen Moore, Hong Liu, Bin Zheng
Accurately assessment of adipose tissue volume inside a human body plays an important role in predicting disease or cancer risk, diagnosis and prognosis. In order to overcome limitation of using only one subjectively selected CT image slice to estimate size of fat areas, this study aims to develop and test a computer-aided detection (CAD) scheme based on deep learning technique to automatically segment subcutaneous fat areas (SFA) and visceral fat areas (VFA) depicting on volumetric CT images. A retrospectively collected CT image dataset was divided into two independent training and testing groups...
June 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28477214/the-new-double-layer-micromesh-stent-roadsaver-%C3%A2-use-in-endovascular-treatment-of-supraaortic-and-visceral-artery-aneurysms-and-pseudoaneurysms
#5
Koray Akkan, Erhan Ilgit, Kutlay Karaman, Baran Onal, Murat Dökdök, Elif Ersöz, Abdullah Özer, Bijen Nazliel
PURPOSE: This study was designed to present our preliminary experience with the Roadsaver(®) double-layer micromesh (DLM) stent in the endovascular treatment of supra-aortic and visceral aneurysms and to utilize the flow-diverting effect of this new design in the treatment of these aneurysms. METHODS: DLM stent (Roadsaver(®), Terumo, Tokyo, Japan) was used in five patients (median age 61.8 years; three men) for treating arterial aneurysms (one common carotid artery, one vertebral artery V1 segment, one superior mesenteric artery, and two renal artery aneurysms)...
May 5, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28455774/applications-of-fusion-fluorescence-imaging-using-indocyanine-green-in-laparoscopic-hepatectomy
#6
Muga Terasawa, Takeaki Ishizawa, Yoshihiro Mise, Yosuke Inoue, Hiromichi Ito, Yu Takahashi, Akio Saiura
BACKGROUND: Indocyanine green (ICG)-fluorescence imaging has been developed for real-time identification of hepatic tumors and segmental boundaries during hepatectomy. Fusion ICG-fluorescence imaging (real-time visualization of pseudocolor-fluorescence signals on white-light color images) may serve as a reliable navigation tool especially in laparoscopic hepatectomy, in which gross inspection and palpation are limited. METHODS: The study population consisted of 41 patients undergoing laparoscopic hepatectomy...
April 28, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28443482/subarachnoid-and-intraperitoneal-hemorrhage-secondary-to-segmental-arterial-mediolysis-a-case-report-and-review-of-the-literature
#7
Brian T Welch, Waleed Brinjikji, Andrew H Stockland, Giuseppe Lanzino
Background Segmental arterial mediolysis (SAM) is an uncommon or underdiagnosed arteriopathy that presents with life-threatening hemorrhage. SAM can affect the intracranial, spinal, and visceral arteries, with reported cases of concomitant intracranial and visceral hemorrhage. Case description We present the case of a 61-year-old male with concurrent subarachnoid and intraperitoneal hemorrhage caused by simultaneously bleeding posterior spinal artery and splenic artery pseudoaneurysms. The posterior spinal artery pseudoaneurysms were treated with selective injection of polyvinyl alcohol particles into the posterior spinal artery, while the splenic artery pseudoaneurysm was treated with Gelfoam embolization...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28433350/open-repair-of-chronic-thoracic-and-thoracoabdominal-aortic-dissection-using-deep-hypothermia-and-circulatory-arrest
#8
Joel Corvera, Hannah Copeland, David Blitzer, Adam Hicks, Joshua Manghelli, Philip Hess, John Fehrenbacher
BACKGROUND: Chronic dissection of the thoracic and thoracoabdominal aorta as sequela of a prior type A or B dissection is a challenging problem that requires close radiographic surveillance and prompt operative intervention in the presence of symptoms or aneurysm formation. Open repair of chronic thoracic and thoracoabdominal aortic dissection using deep hypothermia has been our preferred method to treat this complex pathology. The advantages of this technique include organ and spinal cord protection, the flexibility to extend the repair proximally into the arch, and the ability to limit ischemia to all vascular beds...
March 18, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28432747/whole-body-adipose-tissue-and-lean-muscle-volumes-and-their-distribution-across-gender-and-age-mr-derived-normative-values-in-a-normal-weight-swiss-population
#9
Erika J Ulbrich, Daniel Nanz, Olof Dahlqvist Leinhard, Magda Marcon, Michael A Fischer
PURPOSE: To determine age- and gender-dependent whole-body adipose tissue and muscle volumes in healthy Swiss volunteers in Dixon MRI in comparison with anthropometric and bioelectrical impedance (BIA) measurements. METHODS: Fat-water-separated whole-body 3 Tesla MRI of 80 healthy volunteers (ages 20 to 62 years) with a body mass index (BMI) of 17.5 to 26.2 kg/m(2) (10 men, 10 women per decade). Age and gender-dependent volumes of total adipose tissue (TAT), visceral adipose tissue (VAT), total abdominal subcutaneous adipose tissue (ASAT) and total abdominal adipose tissue (TAAT), and the total lean muscle tissue (TLMT) normalized for body height were determined by semi-automatic segmentation, and correlated with anthropometric and BIA measurements as well as lifestyle parameters...
April 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28411350/acute-appendicitis-somatosensory-disturbances-head-zones-and-the-differential-diagnosis-of-anterior-cutaneous-nerve-entrapment-syndrome-acnes
#10
Rudi M H Roumen, Wouter Vening, Rosanne Wouda, Marc M Scheltinga
BACKGROUND: Anterior cutaneous nerve entrapment syndrome (ACNES) is a neuropathic abdominal wall pain syndrome typically characterized by locally altered skin sensations. On the other hand, visceral disease may also be associated with similar painful and altered skin sensations ("Head zones"). Aim of the study was to determine if patients with acute appendicitis demonstrated somatosensory disturbances in the corresponding right lower quadrant Head zone. METHODS: The presence of somatosensory disturbances such as hyperalgesia, hypoesthesia, altered cool perception, or positive pinch test was determined in 100 patients before and after an appendectomy...
April 14, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28401281/ct-angiography-and-3d-imaging-in-aortoiliac-occlusive-disease-collateral-pathways-in-leriche-syndrome
#11
REVIEW
Sameer Ahmed, Siva P Raman, Elliot K Fishman
Collateral pathways in aortoiliac occlusive disease are essential for arterial blood flow to the abdomen, pelvis, and lower extremities. These pathways can be broadly divided into systemic-systemic, visceral-visceral, and systemic-visceral collateral networks. MDCT angiography is the most commonly used modality for the diagnostic evaluation of patients with aortoiliac occlusive disease, allowing excellent evaluation of stenotic arterial segments, as well as beautifully illustrating resulting collateral pathways (particularly when utilizing 3D reconstruction techniques)...
April 11, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28399552/anatomic-relationship-between-right-recurrent-laryngeal-nerve-and-cervical-fascia-and-its-application-significance-in-anterior-cervical-spine-surgical-approach
#12
Jianlin Shan, Heng Jiang, Dajiang Ren, Chongwei Wang
STUDY DESIGN: An anatomic study of anterior cervical dissection of 42 embalmed cadavers. OBJECTIVE: The aim was to study the anatomic relationship between recurrent laryngeal nerve (RLN) and cervical fascia combined with the requirements in anterior cervical spine surgery (ACSS). SUMMARY OF BACKGROUND DATA: There has been no systematic research about how to avoid RLN injury in anterior cervical spine surgical approach from the aspect of the anatomic relationship between RLN and cervical fascia...
April 15, 2017: Spine
https://www.readbyqxmd.com/read/28389787/validation-study-of-a-new-semi-automated-software-program-for-ct-body-composition-analysis
#13
Naoki Takahashi, Motokazu Sugimoto, Sarah P Psutka, Baiyu Chen, Michael R Moynagh, Rickey E Carter
BACKGROUND: Computed tomography (CT) has been increasingly used to quantify abdominal muscle and fat in clinical research studies, and multiple studies have shown importance of body composition in predicting clinical outcome. The purpose of study is to compare newly developed semi-automated software (BodyCompSlicer) to commercially available validated software (Slice-O-Matic) for CT body composition analysis. METHODS: CT scans of abdomen at L3 level in 30 patients were analyzed by two reviewers and using two softwares (BodyCompSlicer and Slice-O-Matic)...
April 7, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28359794/multilayered-parallel-endografting-for-urgent-endovascular-repair-of-a-severely-angulated-thoracoabdominal-aortic-aneurysm
#14
Sukgu M Han, Sarah Wartman, Sung W Ham, Eric C Kuo, Vincent L Rowe, Fred A Weaver
Total endovascular repair of TAAA using branched, fenestrated stent grafts have been performed with promising midterm results. However, severe angulation of the aorta as well as close proximity of the visceral and renal artery ostia pose a significant technical challenge in designing and implanting branched, fenestrated stent grafts. Parallel grafting offers an alternative technique, allowing an urgent, or emergent total endovascular repair of symptomatic, or ruptured TAAA. We describe a technique of 4-vessel incorporation in a total endovascular repair of TAAA, using multilayered parallel endografting via bilateral femoral and unilateral brachial access...
March 27, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28327564/quantification-of-whole-body-and-segmental-skeletal-muscle-mass-using-phase-sensitive-8-electrode-medical-bioelectrical-impedance-devices
#15
A Bosy-Westphal, B Jensen, W Braun, M Pourhassan, D Gallagher, M J Müller
BACKGROUND/OBJECTIVES: Bioelectrical impedance analysis (BIA) provides noninvasive measures of skeletal muscle mass (SMM) and visceral adipose tissue (VAT). This study (i) analyzes the impact of conventional wrist-ankle vs segmental technology and standing vs supine position on BIA equations and (ii) compares BIA validation against magnetic resonance imaging (MRI) and dual X-ray absorptiometry (DXA). SUBJECTS/METHODS: One hundred and thirty-six healthy Caucasian adults (70 men, 66 women; age 40±12 years) were measured by a phase-sensitive multifrequency BIA (seca medical body composition analyzers 515 and 525)...
March 22, 2017: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28294669/-visceral-complications-of-the-aortic-dissections-indications-and-technique-of-the-thoracoabdominal-refenestration
#16
Csaba Dzsinich, Jenő Szolnoky, Gábor Vallus, Gábor Darabos, Gabriella Nyiri, Dániel Teknős
Aortic dissection is a life threatening cardiovascular catastrophy. Its incidence estimated to 5-6 cases per 100,000 patients/year. The intimal tear happens at the ascending aorta in Type A, meanwhile at the aortic isthmus in Type B, but entry point may develop anywhere alongside the entire aorta. All types may affect a short aortic segment resulting in a localized false aneurysm, others separate the intimal layer at longer extension down to the visceral segment and far beyond to the femoral arteries. Dissection of orifices of side branches may lead to cerebral, upper extremity, spinal, visceral, renal and lower extremity malperfusion...
March 2017: Magyar Sebészet
https://www.readbyqxmd.com/read/28274005/post-caesarean-drain-placement-minor-procedure-leading-to-major-complication
#17
Richa Sharma, Kiran Guleria, Amita Suneja, Vishnu Bhartiya
Intra abdominal drain insertion in doubtful cases has been practised since many years. It may be associated with certain minor as well as major complications like drain site haemorrhage, infection, intestinal perforation and even visceral herniation from the site. Herein, we report a case of 28-year-old unbooked G2P1L1 at 33 weeks gestation with previous caesarean, who underwent Lower Segment Caesarean Section (LSCS) in view of breech presentation in labour. On sixth postoperative day, tubular structure herniation through the drain site was observed...
January 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28258017/anticoagulation-alone-for-aortic-segment-treatment-in-symptomatic-primary-aortic-mural-thrombus-patients
#18
Andrés Reyes Valdivia, Africa Duque Santos, Marta Garnica Ureña, Asunción Romero Lozano, Enrique Aracil Sanus, Julia Ocaña Guaita, Claudio Gandarias
BACKGROUND: Primary aortic mural thrombus (AMT) is a rare entity. Asymptomatic AMT may be found in imaging studies for other disease studies. Symptomatic AMT as embolic events may localize in the arterial branches of the aorta; limb ischemia is the most usual clinical presentation, though. However, when proximal aorta is compromised, visceral branches occlusion and ischemia may determine morbidity and mortality in these patients. METHODS: We performed a retrospective study with collection of data from January 2011 to September 2016...
February 28, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28255032/clinical-and-imaging-characteristics-of-diffuse-intracranial-dolichoectasia
#19
W Brinjikji, D M Nasr, K D Flemming, A Rouchaud, H J Cloft, G Lanzino, D F Kallmes
BACKGROUND AND PURPOSE: Among patients with vertebrobasilar dolichoectasia is a subset of patients with disease affecting the anterior circulation as well. We hypothesized that multivessel intracranial dolichoectasia may represent a distinct phenotype from single-territory vertebrobasilar dolichoectasia. The purpose of this study was to characterize clinical characteristics and angiographic features of this proposed distinct phenotype termed "diffuse intracranial dolichoectasia" and compare them with those in patients with isolated vertebrobasilar dolichoectasia...
March 2, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28243740/atypical-pulmonary-sequestration-causing-respiratory-distress-in-a-2-month-old-male-infant
#20
Julio Bauza Rossi
Pulmonary sequestrations are non-functional masses of lung tissue lacking normal communication with the tracheobronchial tree and systemic-circulation-derived blood supply. The disconnection between the normal airway and pulmonary arterial supply prevents pulmonary sequestrations from participating in respiration while their aberrant circulation increases the potential for hemodynamic imbalance. Extralobar sequestrations are prenatally diagnosed, congenital lesions that may become symptomatic before or after birth, whereas intralobar sequestrations are usually identified during adulthood...
February 27, 2017: Pediatric Surgery International
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