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Thoracic imaging

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https://www.readbyqxmd.com/read/27909659/reliability-of-the-planned-pedicle-screw-trajectory-versus-the-actual-pedicle-screw-trajectory-using-intra-operative-3d-ct-and-image-guidance
#1
Catherine A Miller, Charles G Ledonio, Matthew A Hunt, Farhan Siddiq, David W Polly
BACKGROUND: Technological advances, including navigation, have been made to improve safety and accuracy of pedicle screw fixation. We evaluated the accuracy of the virtual screw placement (Stealth projection) compared to actual screw placement (intra-operative O-Arm) and examined for differences based on the distance from the reference frame. METHODS: A retrospective evaluation of prospectively collected data was conducted from January 2013 to September 2013. We evaluated thoracic and lumbosacral pedicle screws placed using intraoperative O-arm and Stealth navigation by obtaining virtual screw projections and intraoperative O-arm images after screw placement...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27906860/liquid-biopsy-for-early-detection-of-lung-cancer
#2
Paul Hofman
PURPOSE OF REVIEW: The possibility of complete recovery for a lung cancer patient depends on very early diagnosis, as it allows total surgical resection. Screening for this cancer in a high-risk population can be performed using a radiological approach, but this holds a certain number of limitations. Liquid biopsy could become an alternative and complementary screening approach to chest imaging for early diagnosis of lung cancer. RECENT FINDINGS: Several circulating biomarkers indicative of lung cancer can be investigated in blood, such as circulating tumor cells, circulating free nucleic acids (RNA and DNA) and proteins...
January 2017: Current Opinion in Oncology
https://www.readbyqxmd.com/read/27902957/giant-pedunclated-lipoma-of-the-esophagus-a-case-report
#3
Naohiro Taira, Hidenori Kawasaki, Akiko Koja, Tomonori Furugen, Yasuji Oshiro, Eriko Atsumi, Takaharu Ichi, Kazuaki Kushi, Tomofumi Yohena, Tsutomu Kawabata, Masanao Saio, Naoki Yoshimi
INTRODUCTION: Although Esophageal lipoma is extremely rare and pathologically benign, surgical excision of the lipoma is recommended when symptomatic or uncertain biological behavior. In general, some of the esophageal lipoma has a stalk. The pedunclated non-invasive tumor can be removed by stalk ligation, which is either endoscopic or surgical approache. Therefore, the preoperative evaluation is essential. We herein present a case of a huge esophageal lipoma. CASE REPORT: A 82-year-old man, with a wet cough and dyspnea for 6 months, who had the huge mass that almost completely occupied the esophageal lumen, was referred to our institution for the treatment...
November 21, 2016: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/27901387/quantification-and-characterization-of-pleural-fluid-in-healthy-dogs-with-thoracostomy-tubes
#4
Germaine C Hung, M Casey Gaunt, Joseph E Rubin, Gregory S Starrak, Sherisse A Sakals
OBJECTIVE To quantify and characterize pleural fluid collected from healthy dogs after placement of a thoracostomy tube (TT). ANIMALS 8 healthy Coonhound-cross dogs (mean ± SD weight, 27.2 ± 1.6 kg). PROCEDURES Thoracic CT of each dog was performed before placement of a TT and daily thereafter for 7 days. Thoracic fluid volume was calculated from CT images. Effusion was aspirated when detected; volume was recorded, and cytologic analysis and bacterial culture were performed. RESULTS Mean ± SD volume of pleural effusion detected by CT was 1...
December 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27900714/is-there-asymmetry-between-the-concave-and-convex-pedicles-in-adolescent-idiopathic-scoliosis-a-ct-investigation
#5
Colin M Davis, Caroline A Grant, Mark J Pearcy, Geoffrey N Askin, Robert D Labrom, Maree T Izatt, Clayton J Adam, J Paige Little
BACKGROUND: Adolescent idiopathic scoliosis is a complex three-dimensional deformity of the spine characterized by deformities in the sagittal, coronal, and axial planes. Spinal fusion using pedicle screw instrumentation is a widely used method for surgical correction in severe (coronal deformity, Cobb angle > 45°) adolescent idiopathic scoliosis curves. Understanding the anatomic difference in the pedicles of patients with adolescent idiopathic scoliosis is essential to reduce the risk of neurovascular or visceral injury through pedicle screw misplacement...
November 29, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27894713/abdominal-aortic-aneurysm-in-marfan-syndrome
#6
Tracy Hagerty, Patrick Geraghty, Alan C Braverman
OBJECTIVE: Marfan syndrome (MFS) leads to aortic root aneurysm, while descending thoracic aortic aneurysm (TAA) occurs less commonly. Abdominal aortic aneurysm (AAA) is rarely reported in MFS. Risk factors for AAA are poorly understood and there are no guidelines for AAA screening in MFS. We sought to characterize AAA among Marfan patients in our center. METHODS: The records of 12 adults with MFS and AAA disease were reviewed. Clinical features, imaging, operative reports, and outcomes were analyzed...
November 25, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27891270/primary-diffuse-leptomeningeal-gliomatosis-radiological-pathological-features
#7
Ehtasham Ahmad, Mohamed Mohamed, Apostolos Vrettos
We present the case of a 43-year-old lady who presented with headaches, visual impairment, and seizures, progressing rapidly over the course of a few weeks. Extensive workup excluded an inflammatory or infectious cause. Imaging studies revealed diffuse thickening of the leptomeninges and serial CSF analysis showed raised opening pressures and increased protein levels. A diagnostic biopsy of the lower thoracic dura confirmed the diagnosis of primary diffuse leptomeningeal gliomatosis (PDGL). She was managed supportively for her symptoms and unfortunately she passed away a few weeks later...
2016: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/27891032/clinical-anatomy-and-significance-of-the-thoracic-intervertebral-foramen-a-cadaveric-study-and-review-of-the-literature
#8
Grigorios Gkasdaris, Grigorios Tripsianis, Konstantinos Kotopoulos, Stylianos Kapetanakis
INTRODUCTION: The literature is lacking information on the anatomy and the osseous dimensions of the thoracic intervertebral foramen (IVF). We describe the anatomy of the broader area, and we proceed with morphometric data of the vertebrae and the foramina. Depiction of these features is provided with imaging and illustrations. The purpose of this paper is to survey and present the anatomy of the foramen as a whole and provide baseline statistical data. MATERIALS AND METHODS: We review relevant literature, and we present data obtained from skeletal samples of known population and sex...
October 2016: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/27891027/purely-extradural-spinal-nerve-root-hemangioblastomas
#9
REVIEW
Murat Hamit Aytar, Ulaş Yener, Murat Şakir Ekşi, Behram Kaya, Serdar Özgen, Aydin Sav, Ahmet Alanay
Spinal nerve root hemangioblastomas present mostly as intradural-extradurally. Purely extradural spinal nerve root hemangioblastoma is a very rare entity. In this study, we aimed to analyze epidemiological perspectives of purely extradural spinal nerve root hemangioblastomas presented in English medical literature in addition to our own exemplary case. PubMed/MEDLINE was searched using the terms "hemangioblastoma," "extradural," "spinal," and "nerve root." Demographical variables of age, gender, concomitant presence of von Hippel-Lindau (VHL) disease; spinal imaging and/or intraoperative findings for tumor location were surveyed from retrieved articles...
October 2016: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/27890843/total-endovascular-aortic-repair-in-a-patient-with-marfan-syndrome
#10
Mau Amako, Rafaëlle Spear, Rachel E Clough, Adrien Hertault, Richard Azzaoui, Teresa Martin Gonzalez, Jonathan Sobocinski, Stéphan Haulon
OBJECTIVE: To describe a total endovascular aortic repair with branched and fenestrated endografts in a young patient with Marfan syndrome and a chronic aortic dissection. Open surgery is the gold standard to treat aortic dissections in patients with aortic disease and Marfan syndrome. METHODS: In 2000, a 38-year-old man with Marfan syndrome underwent open ascending aorta repair for an acute type A aortic dissection. One year later, a redo sternotomy was performed for aortic valve replacement...
November 24, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27889235/prevalence-and-topographic-distribution-of-spinal-inflammation-on-mr-imaging-in-patients-recently-diagnosed-with-axial-spondyloarthritis
#11
A Larbi, B Fourneret, C Lukas, M-P Baron, N Molinari, P Taourel, C Cyteval
OBJECTIVE: The primary goal of this study was to determine the prevalence and topographic distribution of spinal lesions in lower thoracic and lumbar spine on magnetic resonance imaging (MRI) in patients with recently diagnosed with spondyloarthritis. The secondary goal was to identify variables associated with vertebral patterns consistent with spondyloarthritis on MRI. PATIENTS AND METHODS: A total of 112 HLA-B27 positive patients with recently diagnosed spondyloarthritis were retrospectively included...
November 23, 2016: Diagnostic and Interventional Imaging
https://www.readbyqxmd.com/read/27888429/inappropriateness-of-diagnostic-imaging-examinations-in-the-inpatient-setting-a-case-study-research
#12
Ettore Squillaci, Francesca Bolacchi, Jacopo Scaggiante, Francesca Ricci, Luca Pugliese, Alberto Bergamini, Francesco Garaci, Roberto Floris
OBJECTIVE: The purpose of our study was to audit the clinical appropriateness of the prescriptions of whole body CT (WB-CT), PET-CT and chest X-rays (CXRs) performed at Tor Vergata University Hospital in the inpatient setting. MATERIALS AND METHODS: WB-CT, PET-CT and CXRs examinations were retrospectively analysed in the period between January and December 2014. CXR examinations were divided into bedside CXRs and traditional CXRs. The appropriateness of the examinations was defined according the American College of Radiology Appropriateness Criteria...
November 25, 2016: La Radiologia Medica
https://www.readbyqxmd.com/read/27887856/preoperative-thoracic-false-lumen-branches-relate-to-aortic-remodeling-after-thoracic-endovascular-aortic-repair-for-debakey-iiib-aortic-dissection
#13
Yang Yang Ge, Wei Guo, Nick Cheshire, Xiao Ping Liu, Xin Jia, Jiang Xiong, Xiao Hui Ma, Hong Peng Zhang
OBJECTIVE: This study evaluated the association between thoracic false lumen branches (TFLBs; dissected thoracic branches fed by a false lumen) and distal thoracic aortic enlargement (DTAE) after thoracic endovascular aortic repair (TEVAR) for DeBakey IIIb aortic dissection. METHODS: We retrospectively analyzed the records of 67 patients with DeBakey IIIb dissection initially treated with TEVAR between January 2011 and December 2013. Preoperative and postoperative computed tomography angiography images were reviewed to evaluate the number of preoperative TFLBs and aortic diameter change after TEVAR...
November 22, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27885082/the-size-specific-dose-estimate-ssde-for-truncated-computed-tomography-images
#14
Choirul Anam, Freddy Haryanto, Rena Widita, Idam Arif, Geoff Dougherty
The purpose of this study is to investigate truncated axial computed tomography (CT) images in the clinical environment and to produce correction factors for abdomen, thoracic and head regions based on clinical data, in order to accurately predict the water-equivalent diameter (DW) and size-specific dose estimate (SSDE). We investigated axial images of 75 patients who underwent CT examinations. Truncated axial images were characterized by the truncation percentage (TP). Correction factors were calculated by using the value of DW for a certain TP (truncated image) divided by the value of DW for TP = 0% (the non-truncated image)...
November 24, 2016: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/27884684/factors-related-to-late-false-lumen-enlargement-after-thoracic-stent-graft-placement-for-type-b-aortic-dissection
#15
Alessandro Gasparetto, Kwang Bo Park, Saher S Sabri, Auh Whan Park, Alan H Matsumoto, John Fritz Angle
PURPOSE: To evaluate significant factors related to delayed aortic false lumen (FL) enlargement in patients who have undergone thoracic stent-graft placement for type B aortic dissection. MATERIALS AND METHODS: The study included 62 patients (45 male, 17 female) aged 26-80 years (mean age, 58.1 y) who underwent thoracic endovascular aortic repair for type B aortic dissection at a single institution between January 2005 and May 2015. Mean age of aortic dissections was 5...
November 21, 2016: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/27884333/c-spine-injury-and-mandibular-fractures-lifesaver-broken-in-two-spots
#16
Michael W Chu, Tahereh Soleimani, Tyler A Evans, Sarah I Fernandez, Leigh Spera, Carrie Klene, Ben L Zarzaur, Sunil S Tholpady
BACKGROUND: Trauma is a leading cause of injury and mortality and may involve mandibular fractures and cervical spine injuries. Manipulation of the spine during trauma protocols and operative treatment has the potential to cause serious spinal cord injuries. The purpose of this study was to identify risk factors associated with cervical spine injury (CSI) in patients with mandibular fractures. METHODS: The National Trauma Databank (2007-2010) was used to identify patients with mandibular fractures...
December 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/27881158/evaluation-of-daily-patient-positioning-for-radiotherapy-with-a-commercial-3d-surface-imaging-system-catalyst%C3%A2
#17
F Walter, P Freislederer, C Belka, C Heinz, M Söhn, F Roeder
BACKGROUND: To report our initial clinical experience with the novel surface imaging system Catalyst™ (C-RAD AB, Sweden) in connection with an Elekta Synergy linear accelerator for daily patient positioning in patients undergoing radiation therapy. METHODS: We retrospectively analyzed the patient positioning of 154 fractions in 25 patients applied to thoracic, abdominal, and pelvic body regions. Patients were routinely positioned based on skin marks, shifted to the calculated isocenter position and treated after correction via cone beam CT which served as gold standard...
November 24, 2016: Radiation Oncology
https://www.readbyqxmd.com/read/27879569/the-azygous-vein-is-at-potential-risk-of-injury-from-mal-positioning-of-left-thoracic-pedicle-screw-in-thoracic-adolescent-idiopathic-scoliosis-patients
#18
Jun Jiang, Bang-Ping Qian, Yong Qiu, Bin Wang, Yang Yu, Ze-Zhang Zhu
STUDY DESIGN: A computed tomography (CT) study OBJECTIVE.: To evaluate the changed position of azygous vein in thoracic adolescent idiopathic scoliosis (AIS) patients and to analyze the potential risk of injury of azygous vein from thoracic pedicle screw placement in these patients. SUMMARY OF BACKGROUND DATA: It has been widely recognized that the anatomic positions of structures adjacent to the vertebrae may change in AIS patients. To date, no study had evaluated such change of azygous vein in AIS patients...
November 22, 2016: Spine
https://www.readbyqxmd.com/read/27878400/multiphoton-microscopy-observations-of-3d-elastin-and-collagen-fiber-microstructure-changes-during-pressurization-in-aortic-media
#19
Shukei Sugita, Takeo Matsumoto
Elastin and collagen fibers play important roles in the mechanical properties of aortic media. Because knowledge of local fiber structures is required for detailed analysis of blood vessel wall mechanics, we investigated 3D microstructures of elastin and collagen fibers in thoracic aortas and monitored changes during pressurization. Using multiphoton microscopy, autofluorescence images from elastin and second harmonic generation signals from collagen were acquired in media from rabbit thoracic aortas that were stretched biaxially to restore physiological dimensions...
November 22, 2016: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/27876516/predictors-of-aortic-growth-in-uncomplicated-type-b-aortic-dissection-from-the-acute-dissection-stent-grafting-or-best-medical-treatment-adsorb-database
#20
Arnoud V Kamman, Jan Brunkwall, Eric L Verhoeven, Robin H Heijmen, Santi Trimarchi
BACKGROUND: The high-risk patient cohort of uncomplicated type B aortic dissections (uTBADs) needs to be clarified. We compared uTBAD patients treated with best medical treatment (BMT), with and without aortic growth, from the Acute Dissection Stent Grafting or Best Medical Treatment (ADSORB) trial database. Furthermore, we looked for trends in outcome for aortic growth and remodeling after BMT and thoracic endovascular aortic repair (TEVAR) and BMT (TEVAR+BMT). METHODS: BMT patients with available baseline and a 1-year follow-up arterial computed tomography scan were identified...
November 19, 2016: Journal of Vascular Surgery
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