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https://www.readbyqxmd.com/read/28637483/analyzing-human-decisions-in-igrt-of-head-and-neck-cancer-patients-to-teach-image-registration-algorithms-what-experts-know
#1
Eva Maria Stoiber, Nina Bougatf, Hendrik Teske, Christian Bierstedt, Dieter Oetzel, Jürgen Debus, Rolf Bendl, Kristina Giske
BACKGROUND: In IGRT of deformable head-and-neck anatomy, patient setup corrections are derived by rigid registration methods. In practice, experienced radiation therapists often correct the resulting vectors, thus indicating a different prioritization of alignment of local structures. Purpose of this study is to transfer the knowledge experts apply when correcting the automatically generated result (pre-match) to automated registration. METHODS: Datasets of 25 head-and-neck-cancer patients with daily CBCTs and corresponding approved setup correction vectors were analyzed...
June 21, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28625308/the-role-of-ultrasonography-in-obstetric-anesthesia
#2
REVIEW
Allison Lee, John P R Loughrey
Ultrasonography is increasingly being viewed as an everyday tool in obstetric anesthesia. For the administration of spinal or epidural anesthesia, it reduces needle redirection attempts in patients with difficult anatomy. In the less frequent scenario of a collapsed patient, it helps with assessment in the form of transthoracic echocardiography. Abdominal blocks require ultrasound guidance for safe and anatomically correct placement. Accurate assessment of gastric volume status with ultrasound would be a useful everyday skill if it is adopted into mainstream practice...
March 2017: Best Practice & Research. Clinical Anaesthesiology
https://www.readbyqxmd.com/read/28616343/debranching-aortic-surgery
#3
REVIEW
Manuel Alonso Pérez, José Manuel Llaneza Coto, José Antonio Del Castro Madrazo, Carlota Fernández Prendes, Mario González Gay, Amer Zanabili Al-Sibbai
Conventional open surgery still remains as the gold standard of care for aortic arch and thoracoabdominal pathology. In centers of excellence, open repair of the arch has been performed with 5% immediate mortality and a low rate of complications; however overall mortality rates are around 15%, being up to 40% of all patients rejected for treatment due to their age or comorbidities. For thoracoabdominal aortic pathology, data reported from centers of excellence show immediate mortality rates from 5% to 19%, spinal cord ischemia from 2...
May 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28609321/change-in-lung-volume-following-thoracoscopic-anterior-spinal-fusion-surgery-a-3-dimensional-computed-tomography-investigation
#4
Caroline G Yu, Caroline A Grant, Maree T Izatt, Robert D Labrom, Geoffrey N Askin, Clayton J Adam, J Paige Little
STUDY DESIGN: Lung volumes and thoracic anatomy were measured from low-dose computed tomography (CT) scans preoperatively and 2 years following thoracoscopic anterior spinal fusion (TASF) for adolescent idiopathic scoliosis (AIS). OBJECTIVE: The aim of this study was to assess changes in lung volume after TASF surgical correction. SUMMARY OF BACKGROUND DATA: AIS patients are known to have decreased pulmonary function as a consequence of their spinal and ribcage deformity...
June 15, 2017: Spine
https://www.readbyqxmd.com/read/28604466/unique-considerations-in-spinal-cord-stimulator-placement-in-pediatrics-a-case-report
#5
Eugene Kim, Giovanni Cucchiaro
Spinal cord stimulation can be a valuable treatment option in the management of neuropathic pain in select pediatric patients. We present a unique case of a 16-year-old girl with Klippel-Trenaunay-Weber syndrome and scoliosis who required the placement of a spinal cord stimulator (SCS) for severe sciatic nerve neuropathic pain after a right above-knee amputation. Several attempts at lead placement were required before successful pain coverage was achieved because of late recognition of significant vertebral body rotation...
June 8, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28603566/current-concepts-in-pediatric-cervical-spine-trauma
#6
Kunal Shah, Agnivesh Tikoo, Manish K Kothari, Abhay Nene
BACKGROUND: Pediatric spinal trauma is rare and challenging entity. Although cervical spine is commonly affected, it is often missed on routine imaging investigations. Therefore better understanding of growing spine and its patho-physiology is crucial. METHODS: Articles related to pediatric cervical trauma were searched on Pubmed and other online research data banks. We have summarized unique anatomy of pediatric spine, investigations followed by common injury patterns, their diagnostic challenges and management...
2017: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/28598291/spinal-navigation-for-posterior-instrumentation-of-c1-2-instability-using-a-mobile-intraoperative-ct-scanner
#7
Marcus Czabanka, Julien Haemmerli, Nils Hecht, Bettina Foehre, Klaus Arden, Thomas Liebig, Johannes Woitzik, Peter Vajkoczy
OBJECTIVE Spinal navigation techniques for surgical fixation of unstable C1-2 pathologies are challenged by complex osseous and neurovascular anatomy, instability of the pathology, and unreliable preoperative registration techniques. An intraoperative CT scanner with autoregistration of C-1 and C-2 promises sufficient accuracy of spinal navigation without the need for further registration procedures. The aim of this study was to analyze the accuracy and reliability of posterior C1-2 fixation using intraoperative mobile CT scanner-guided navigation...
June 9, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28593553/prenatal-diagnosis-of-spina-bifida-from-intracranial-translucency-to-intrauterine-surgery
#8
Waldo Sepulveda, Amy E Wong, Francisco Sepulveda, Juan L Alcalde, Juan C Devoto, Felipe Otayza
Accurate and timely prenatal diagnosis of spina bifida (SB) is a major goal of modern antenatal care. Prenatal screening for open SB should be first performed at the time of routine first-trimester ultrasound by examining the posterior fossa for obliteration or non-visualization of the fourth ventricle ("intracranial translucency") and cisterna magna. The second step of screening is the second-trimester anatomy scan, at which time the features of the Chiari type II malformation should be looked for, including ventriculomegaly, scalloping of the frontal bones ("lemon" sign), and backward and caudal displacement of the cerebellar vermis with obliteration of the cisterna magna ("banana" sign)...
June 7, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28583042/cervical-cord-decompression-following-embolisation-of-a-giant-cervical-vertebro-vertebral-arteriovenous-fistula
#9
George H Tse, Umang J Patel, Stuart C Coley, Richard A Dyde
Arteriovenous fistulation between the vertebral arteries to extradural (epidural) veins, termed vertebro-vertebral arteriovenous fistulae, are uncommon diagnoses without established diagnostic algorithms or treatment options. Minimal evidence exists describing the management of this pathology. Endovascular treatment was performed under general anaesthesia by coil occlusion of the vertebral artery from the point of the fistula to the mid-vertebral artery. Repeat magnetic resonance angiographic imaging one week following the procedure confirmed an 80% reduction in the size of the epidural vein and decompression of the cervical spinal cord...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28580526/deformable-appearance-pyramids-for-anatomy-representation-landmark-detection-and-pathology-classification
#10
Qiang Zhang, Abhir Bhalerao, Charles Hutchinson
PURPOSE: Representation of anatomy appearance is one of the key problems in medical image analysis. An appearance model represents the anatomies with parametric forms, which are then vectorised for prior learning, segmentation and classification tasks. METHODS: We propose a part-based parametric appearance model we refer to as a deformable appearance pyramid (DAP). The parts are delineated by multi-scale local feature pyramids extracted from an image pyramid. Each anatomy is represented by an appearance pyramid, with the variability within a population approximated by local translations of the multi-scale parts and linear appearance variations in the assembly of the parts...
June 3, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28578699/treating-lung-cancer-with-dynamic-conformal-arc-therapy-a-dosimetric-study
#11
Primož Peterlin, Karmen Stanič, Ignasi Méndez, Andrej Strojnik
BACKGROUND: Lung cancer patients are often in poor physical condition, and a shorter treatment time would reduce their discomfort. Dynamic conformal arc therapy (DCAT) offers a shorter treatment time than conventional 3D conformal radiotherapy (3D CRT) and is usually available even in departments without inverse planning possibilities. We examined its suitability as a treatment modality for lung cancer patients. METHODS: On a cohort of 35 lung cancer patients, relevant dosimetric parameters were compared in respective DCAT and 3D CRT treatment plans...
June 2, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28552138/spinal-arteriovenous-malformations-surgical-management
#12
David S Xu, Hai Sun, Robert F Spetzler
Spinal arteriovenous malformations (AVMs) are a diverse population of vascular lesions associated with significant long-term morbidity and neurologic impairment. Spinal AVMs can be classified into three categories: intramedullary, extradural-intradural, and conus, depending on their angioarchitecture and anatomy. Extradural-intradural lesions are typically incurable due to their diffuse nature, but patients may benefit from targeted therapy of symptomatic components. Intramedullary and conus AVMs are amenable to safe surgical resection when combined with endovascular embolization and use of a pial dissection technique that spares entry into the neural parenchyma...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552136/epidemiology-clinical-presentation-diagnostic-evaluation-and-prognosis-of-spinal-arteriovenous-malformations
#13
Alp Ozpinar, Gregory M Weiner, Andrew F Ducruet
Spinal arteriovenous malformations (sAVM) are rare vascular pathologies whose natural history remains incompletely understood. Advances in diagnostic imaging, coupled with the evolution of endovascular and microsurgical techniques have led to the description of a number of classification schemes for these lesions. An updated method has changed AVM classification from five categories of lesion based on source and location of feeder vessels to three categories based on pathophysiology. These categories include extradural arteriovenous fistulae (AVFs), intradural AVFs, extradural-intradural AVFs, intramedullary AVMs, and conus medullaris AVM each with individual subclassifications...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28538370/radiographic-anatomical-relationship-between-spinous-process-and-pedicle-in-thoracolumbar-and-lumbar-spine
#14
Xingang Cui, Guodong Wang
Pedicle screws are widely used in spinal surgeries, but it remains technically demanding to place. There are numerous studies on the anatomy of pedicle; however, there is very little insight on the relationship between the pedicle and the spinous process, which is an important part of the spinal posterior column.The aim of the study was to investigate the radiographic anatomical relationship between spinous processes and pedicles in the thoracolumbar and lumbar spine, in order to reveal a novel entrance point for pedicle screw insertion...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28532919/image-guided-lateral-mass-osteotomy-for-en-bloc-resection-of-cervical-ewing-s-sarcoma-a-technical-note
#15
Julian Li, Kevin Phan, Tommy Manh Tran, Ralph Mobbs, Ralph Stanford
BACKGROUND: En bloc resection of Ewing's sarcoma according to Enneking's principles is technically challenging in the cervical spine due to the proximity of important neurovascular structures, complex local anatomy and biomechanical instability of radical resection. The rarity of Ewing's sarcoma and variability of presentation justifies ongoing compilation of the surgical nuances and subtleties of en bloc resection in the cervical spine. CASE DESCRIPTION: We present a 34-year-old male with Ewing's sarcoma of the neck who underwent successful en bloc resection using a novel technique of splitting the laminae and osteomising the lateral masses using image guidance...
May 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28526487/ultrasound-guided-thoracic-paravertebral-injection-in-dogs-a-cadaveric-study
#16
Diego A Portela, Luis Campoy, Pablo E Otero, Manuel Martin-Flores, Robin D Gleed
OBJECTIVE: To describe ultrasound-visualized anatomy and the spread characteristics of a dye injected in the thoracic paravertebral (TPV) space under ultrasound guidance. STUDY DESIGN: Anatomic cadaver study. ANIMALS: Seven dog cadavers. METHODS: One cadaver was used to observe, identify, and describe the relevant TPV anatomy. In the remaining six, the left fifth TPV space was randomly assigned to be injected with either a low volume (LV; 0...
February 16, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28525494/optimal-entry-point-and-trajectory-for-anterior-c1-lateral-mass-screw
#17
Yong Hu, Wei-Xin Dong, William Ryan Spiker, Zhen-Shan Yuan, Xiao-Yang Sun, Jiao Zhang, Hui Xie, Todd J Albert
STUDY DESIGN: A radiographic analysis of the anatomy of the C1 lateral mass using computed tomography (CT) scans and Mimics software. OBJECTIVE: To define the anatomy of the C1 lateral mass and make recommendations for optimal entry point and trajectory for anterior C1 lateral mass screws. SUMMARY OF BACKGROUND DATA: Although various posterior insertion angles and entry points for screw insertion have been proposed for posterior C1 lateral mass screws, no large series have been performed to assess the ideal entry point and optimal trajectory for anterior C1 lateral mass screw placement...
June 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28507828/multiple-large-perineural-tarlov-cysts-in-the-sacrum-of-a-cadaver-a-case-report-and-review
#18
Jocelyn Gonzales, Joe Iwanaga, Nitsa Topale, Rod J Oskouian, R Shane Tubbs
Tarlov or perineural cysts are cerebrospinal fluid (CSF)-filled sacs found between the perineurium and epineurium of the nerve roots. It is still unsure whether the origin of these cysts is intradural or extradural. They can either be asymptomatic or create a variety of negative impacts on comfort and quality of life. In this case report, we describe the presentation of multiple Tarlov cysts including one large cyst discovered during a routine cadaveric spinal dissection and the relevant and related literature...
April 12, 2017: Curēus
https://www.readbyqxmd.com/read/28484818/rives-technique-for-the-primary-larger-inguinal-hernia-repair-a-prospective-study-of-1000-repairs
#19
Enrique J Grau-Talens, Carlos D Ibáñez, Jacob Motos-Micó, Francisco García-Olives, Martina Arribas-Jurado, Carlos Jordán-Chaves, José M Aparicio-Gallego, José F Salgado
OBJECTIVE: We report a prospective study of repairs using the Rives technique of the more difficult primary inguinal hernias, focusing on the immediate post-operative period, clinical recurrence, testicular atrophy, and chronic pain. A mesh placed in the preperitoneal space can reduce recurrences and chronic pain. METHODS: For the larger primary inguinal hernias (Types 3, 4, 6, and some 7), we favour preperitoneal placement of a mesh, covering the myopectineal orifice by means of a transinguinal (Rives technique) approach...
May 8, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28465274/gerard-blaes-blasius-1627-1682-the-dutch-physician-and-chemist-his-work-and-his-description-of-the-spinal-cord
#20
REVIEW
Konstantinos Markatos, Konstantinos Laios, Demetrios Korres, Anna Tzivra, Spyridon Tsoutsos, Georgios Androutsos
The purpose of this historical review is to summarize the work of the Dutch physician, chemist and anatomist Gerard Blaes (Blasius). A detailed account of his life and work is presented with emphasis on his contribution to anatomy. In particular, special reference is made to his innovative description of the spinal cord and spinal nerves. The contribution of Gerard Blasius to neuroanatomy was remarkable when taking into account the limited technology and lack of modern devices of his era. As a true man of his era, he had a significant contribution in research and teaching of anatomy, botany and chemistry...
April 29, 2017: World Neurosurgery
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