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Thoracic MRI

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https://www.readbyqxmd.com/read/28937270/feasibility-of-free-breathing-lung-mri-for-radiotherapy-using-non-cartesian-k-space-acquisition-schemes
#1
Shivani Kumar, Robba Rai, Alto Stemmer, Sonal Josan, Lois Holloway, Shalini Vinod, Daniel Moses, Gary Liney
OBJECTIVES: To test a free breathing MRI protocol for anatomical and functional assessment during lung cancer radiotherapy by assessing two non-cartesian acquisition schemes based on a T1W 3D gradient recall echo sequence: (i) stack-of stars (StarVIBE) and (ii) spiral (SpiralVIBE) trajectories Methods: MR images on five healthy volunteers were acquired on a wide bore 3T scanner (Skyra, Siemens Healthcare). Anatomical image quality was assessed on: (1) free breathing (StarVIBE), (2) the standard clinical sequence (VIBE) acquired in a 20 second compliant breath-hold and (3) 20 second non-complaint breath-hold...
September 13, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28934935/treatment-and-outcomes-of-tumor-induced-osteomalacia-associated-with-phosphaturic-mesenchymal-tumors-retrospective-review-of-12-patients
#2
Qing-Yao Zuo, Hong Wang, Wei Li, Xiao-Hui Niu, Yan-Hong Huang, Jia Chen, Yu-Hua You, Bao-Yue Liu, Ai-Min Cui, Wei Deng
BACKGROUND: Tumor-induced osteomalacia (TIO) is a rare paraneoplastic syndrome characterized by severe hypophosphatemia and osteomalacia. Nonspecific symptoms make the diagnosis elusive. In addition, locating the responsible tumor(s) is challenging. The aim of this study was to investigate the clinical management and outcomes of TIO. METHODS: The clinical features, diagnostic procedures, treatment, and outcomes of 12 patients were reviewed retrospectively. RESULTS: The cohort comprised six men and six women (mean age 45...
September 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28932697/thoracic-wall-trauma-misdiagnosed-lesions-on-radiographs-and-usefulness-of-ultrasound-multidetector-computed-tomography-and-magnetic-resonance-imaging
#3
REVIEW
Xavier Tomas, Catherine Facenda, Nuno Vaz, Edgar Augusto Castañeda, Montserrat Del Amo, Ana Isabel Garcia-Diez, Jaime Pomes
Blunt injuries to the chest wall are an important chapter on emergency room (ER) departments, being the third most common injuries in trauma patients which ominous complications could appear. This article describes different types of traumatic events affecting the chest wall, which maybe misdiagnosed with conventional X-ray. Special emphasis has been done in computed tomography (CT) and multidetector CT (MDCT) imaging. This technique is considered the "gold-standard" for those traumatic patients, due to its fast acquisition covering the whole area of interest in axial plane, reconstructing multiplanar (2D, 3D) volume-rendered images with a superb quality and angiographic CT capabilities for evaluating vascular damage...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28925047/voxel-by-voxel-4d-flow-mri-based-assessment-of-regional-reverse-flow-in-the-aorta
#4
Xin Shen, Susanne Schnell, Alex J Barker, Kenichiro Suwa, Lingzi Tashakkor, Kelly Jarvis, James C Carr, Jeremy D Collins, Shyam Prabhakaran, Michael Markl
BACKGROUND: Complex and reverse flow in the aorta has been implicated in aneurysm development and stroke via retrograde embolization. PURPOSE: To evaluate global and regional differences between standard 2D plane-based and volumetric voxel-based quantification of regional forward/reverse flow, and reverse flow fraction (RFF) in the aorta. STUDY TYPE: Retrospective. SUBJECTS: In all, 35 subjects: 10 healthy controls (age: 57 ± 7 years, nine male), nine patients without aortic valve regurgitation (AR) (age: 63 ± 10 years, seven male), six patients with mild AR (age: 66 ± 6 years, five male), and 10 with moderate or severe AR (age: 60 ± 16 years, eight male)...
September 18, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28916623/efficacy-of-radioembolization-with-holmium-166-microspheres-in-salvage-patients-with-liver-metastases-a-phase-2-study
#5
Jip F Prince, Maurice A A J van den Bosch, J F W Nijsen, Maarten L J Smits, Andor F van den Hoven, Stavros Nikolakopoulos, Frank J Wessels, Rutger C G Bruijnen, Manon Braat, Bernard A Zonnenberg, Marnix Lam
Rationale: Radioembolization of liver malignancies with holmium-166 (166Ho) microspheres has been shown safe in a phase 1 dose-escalation study. The purpose of this study was to investigate the efficacy of 166Ho radioembolization. Methods: In this prospective single-arm study, 56 patients were enrolled, all with liver metastases refractory to systemic therapy and ineligible for surgical resection. Radioembolization was performed with a projected average absorbed dose of 60 Gy to the liver (equal to 3.8 GBq/kg liver tissue)...
September 15, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28905268/fluid-and-biomechanical-analysis-of-ascending-thoracic-aorta-aneurysm-with-concomitant-aortic-insufficiency
#6
F Condemi, S Campisi, M Viallon, T Troalen, G Xuexin, A J Barker, M Markl, P Croisille, O Trabelsi, C Cavinato, A Duprey, S Avril
We present a comprehensive and original framework for the biomechanical analysis of patients affected by ascending thoracic aorta aneurysm and aortic insufficiency. Our aim is to obtain crucial indications about the role played by deranged hemodynamics on the ATAAs risk of rupture. Computational fluid dynamics analysis was performed using patient-specific geometries and boundary conditions derived from 4D MRI. Blood flow helicity and wall shear stress descriptors were assessed. A bulge inflation test was carried out in vitro on the 4 ATAAs after surgical repair...
September 13, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28894387/modic-changes-of-the-cervical-spine-t1-slope-and-its-impact-on-axial-neck-pain
#7
Jia Li, Shuhui Qin, Yongqian Li, Yong Shen
BACKGROUND: The purpose of the research was to evaluate cervical sagittal parameters on magnetic resonance imaging (MRI) in patients with Modic changes and its impact on axial neck pain. METHODS: This study consisted of 266 consecutive asymptomatic or symptomatic patients with Modic changes, whose average age was 50.9±12.6 years from January 2015 to December 2016. Cervical sagittal parameters included sagittal alignment of the cervical spine (SACS), T1 slope, thoracic inlet angle (TIA), and neck tilt (NT)...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28890987/impact-of-patient-specific-inflow-velocity-profile-on-hemodynamics-of-the-thoracic-aorta
#8
Pouya Youssefi, Alberto Gomez, Christopher Arthurs, Rajan Sharma, Marjan Jahangiri, Alberto Figueroa
Background-Computational fluid dynamics (CFD) provides a non-invasive method to functionally assess aortic hemodynamics. The thoracic aorta has an anatomically complex inlet comprising of the aortic valve, which is highly prone to different morphologies and pathologies. We investigated the effect of using patient-specific inflow velocity profiles compared to idealised profiles based on the patient's flow waveform. Methods-A healthy 31yo with a normally functioning tricuspid aortic valve (subject A), and a 52yo with a bicuspid aortic valve, aortic valvular stenosis and dilated ascending aorta (subject B) were studied...
September 11, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28890232/complete-progressive-ophthalmoplegia-and-numb-chin-syndrome-the-first-clinical-manifestations-of-a-lethal-abdominal-burkitt-lymphoma
#9
Smaranda Maier, Rodica Bălaşa, Zoltan Bajko, Iunius Simu, Emoke Horvath
A 57-year-old patient was admitted to the Neurology Clinic for hypoesthesia, intense pain in the right chin and double vision. During the hospitalization, the patient developed progressive complete bilateral ophthalmoplegia and numbness of both sides of the chin. Brain CT and MRI scans with gadolinium were normal. Standard laboratory tests on admission were normal. The cerebral spinal fluid examination and the infectious and autoimmune workup were also normal. A thoracic-abdominal and pelvic CT scan revealed two hypodense lesions in the liver, irregular thickening of the gastric and ileal wall, and multiple abdominal adenopathies...
August 18, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28883880/semi-lobar-holoprosencephaly-with-vertebral-segmentation-defects
#10
Birendra Rai, Farhana Sharif
Holoprosencephaly is the most common embryonic brain defect. Foetuses who survive during intrauterine life are born with varying grades of brain and facial deformities. Extra craniofacial manifestations are common. Vertebral segmentation defects are rarely seen with holoprosencephaly, mainly in association with holoprosencephaly diencephalic hamartoblastoma (HDH) association. A female infant was born at term by normal delivery. Birth head circumference was below the 3rd percentile. Antenatal scan had showed microcephaly as the only abnormality...
2017: Iranian Journal of Child Neurology
https://www.readbyqxmd.com/read/28882716/remote-thoracic-myelopathy-from-a-spinal-dural-arteriovenous-fistula-at-the-cranio-cervical-junction-case-report-and-review-of-literature
#11
Michael J Lang, Stavropoula Tjoumakaris, Robert H Rosenwasser, Pascal Jabbour
BACKGROUND: The cranio-cervical junction is a rare location for spinal dural arteriovenous fistulas (dAVF). Typically, fistulas at this location present with findings related to intracranial cortical venous reflux or with cervical myelopathy. We present a case of cranio-cervical junction dAVF with isolated clinical and radiographic findings of thoracolumbar myelopathy. CASE DESCRIPTION: A 54 year-old male presented with subacute onset of lower extremity weakness, paresthesias and gait dysfunction...
September 4, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28882520/dynamic-foraminal-dimensions-during-neck-extension-and-rotation-in-fusion-and-artificial-disc-replacement-an-observational-study
#12
Yener N Yeni, Timothy Baumer, Daniel Oravec, Azam Basheer, Colin P McDonald, Michael J Bey, Stephen W Bartol, Victor Chang
BACKGROUND: Changes in the dimensions of the cervical neural foramina (CNF) are considered to be a key factor in nerve root compression and development of cervical radiculopathy. However, to what extent foraminal geometry differs between patients who underwent anterior cervical discectomy and fusion (ACDF) and those who underwent total disc arthroplasty with an artificial disc (AD) during physiological motion is largely unknown. PURPOSE: The objective of this study is to compare compare CNF dimensions during physiological neck motion between ACDF and AD...
September 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28872450/the-association-between-aortic-regurgitation-and-undetermined-embolic-infarction-with-aortic-complex-plaque
#13
Dae-Won Kim, Jung Sun Cho, Jae Yeong Cho, Kye Hun Kim, Byung Joo Sun, Jae-Hyeong Park
Background Retrograde embolism from the descending thoracic aorta is one possible cause of undetermined ischemic stroke. Significant aortic regurgitation can increase the amount of reversed flow in the thoracic aorta and thus is associated with an increased incidence of stroke. Aims This study aimed to examine the association between significant aortic regurgitation and undetermined embolic infarction with aortic complex plaques. Methods This study included 380 patients with undetermined embolic stroke who did not have abnormal flow such as atrial septal defect, patent foramen ovale determined by agitated saline bubble test, intracardiac thrombi on transesophageal echocardiography, atrial fibrillation, or small vessel stroke, cerebral artery, and carotid stenosis on the brain magnetic resonance imaging...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28870820/is-there-a-place-for-the-posterior-approach-in-cases-of-acute-myelopathy-on-thoracic-disc-hernia
#14
David Brauge, Rachid Madkouri, Vincent Reina, Saad Bennis, Bertrand Baussart, Etienne Mireau, Sorin Aldea, Stephan Gaillard
BACKGROUND: Acute myelopathy in the case of thoracic disc herniation (TDH) is an exceptional condition, for which the treatment is not codified. We present here the results of a standardized procedure on ten patients operated between December 2009 and December 2016 for acute myelopathy on TDH. METHOD: Our strategy consists of a cautious laminectomy without resection of the hernia on the day of admission. In the following days, a complementary thoracoscopic procedure is organized according to the neurological recovery and the nature of the hernia (calcified or fibrous)...
September 1, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28868203/titanium-versus-polyetheretherketone-implants-for-vertebral-body-replacement-in-the-treatment-of-77-thoracolumbar-spinal-fractures
#15
Rafael Augusto Castro Santiago Brandão, Warley Carvalho da Silva Martins, Aluízio Augusto Arantes, Sebastião Nataniel Silva Gusmão, Gilles Perrin, Cédric Barrey
BACKGROUND: Titanium and polyetheretherketone (PEEK) implants have been used in spinal surgery with low rejection rates. Compared to titanium, PEEK has many advantages, including a density more similar to that of bone, radiolucency, and a lack of artifacts in computed tomography (CT) and magnetic resonance imaging (MRI). In this study, we evaluated the effectiveness of PEEK cages as an alternative to titanium for bone fusion after fractures of the thoracolumbar spine. We also propose a classification to the impaction index...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28868202/a-thoracic-vertebral-localization-of-a-metastasized-cutaneous-merkel-cell-carcinoma-case-report-and-review-of-literature
#16
Rosario Maugeri, Antonella Giugno, Roberto G Giammalva, Carlo Gulì, Luigi Basile, Francesca Graziano, Domenico G Iacopino
BACKGROUND: Merkel cell carcinoma (MCC) is a rare neuroendocrine skin tumor, which may be related to sun exposure. It can metastasize to lungs, liver and bone, leading to severe morbidity and mortality. Vertebral metastases from MCC are rare. The authors report the tenth case in the literature, a 59-year-old patient with MCC, which was primarily localized in the scalp, and later provoked distant metastasis to the thoracic spinal column. CASE DESCRIPTION: A 59-year-old woman was admitted at our Unit of Neurosurgery with a 4-month history of progressive and severe dorsal back pain, without neurological signs...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28861738/a-surgical-case-of-radiotherapy-induced-esophageal-perforation-accompanying-pyogenic-spondylodiscitis-a-case-report
#17
Shuntaro Yoshimura, Kazuhiko Mori, Koichiro Kawasaki, Asami Tanabe, Susumu Aikou, Koichi Yagi, Masato Nishida, Hiroharu Yamashita, Sachiyo Nomura, Masayoshi Fukushima, Hideomi Yamashita, Yasuhiro Yamauchi, Yasuyuki Seto
BACKGROUND: Stereotactic body radiotherapy has been a treatment choice for lung cancer, especially in medically inoperable patients. However, the acute and late toxicity to adjacent organs have been reported as an uncommon but severe adverse effect. CASE PRESENTATION: A 65-year-old male was presented with his back pain and pyrexia. He had been followed up for non-small-cell lung cancer, which was treated by the stereotactic body radiotherapy 4 years prior to the current visit...
August 31, 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28858871/unilateral-upper-lung-field-pulmonary-fibrosis-radiologically-consistent-with-pleuroparenchymal-fibroelastosis-after-thoracotomy-a-new-disease-entity-related-to-thoracotomy
#18
Akimasa Sekine, Hiroaki Satoh, Tae Iwasawa, Kentaro Matsui, Eriko Ikeya, Satoshi Ikeda, Hideaki Yamakawa, Ryo Okuda, Hideya Kitamura, Takeshi Shinohara, Tomohisa Baba, Shigeru Komatsu, Terufumi Kato, Eri Hagiwara, Takashi Ogura
BACKGROUND: Pleuroparenchymal fibroelastosis (PPFE) is a rare bilateral idiopathic interstitial pneumonia defined by pleural-parenchymal involvement. In clinical practice, we encountered patients with upper lung field pulmonary fibrosis (Upper-PF), which was radiologically consistent with PPFE, but apparently limited to the unilateral lung. OBJECTIVES: The purpose of the study was to clarify the clinical characteristics in those patients. METHODS: We examined the medical records of all the consecutive patients from 2012 to 2016 to see whether there were patients having unilateral Upper-PF...
September 1, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28845843/spinal-cord-compression-secondary-to-extramedullary-hematopoiesis-a-rareness-in-a-young-adult-with-thalassemia-major
#19
Shehab Fareed, Ashraf T Soliman, Vincenzo De Sanctis, Samah Kohla, Dina Soliman, Diala Khirfan, Adriana Tambuerello, Mohamed Talaat, Abdulqadir Nashwan, Palmira Caparrotti, Mohamed A Yassin
We report a case of a thalassemia major male patient with back pain associated to severe weakness in lower extremities resulting in the ability to ambulate only with assistance. An urgent magnetic resonance imaging (MRI) of  thoracic and lumbosacral spine was requested. A posterior intraspinal extradural mass lesion compressing the spinal cord at the level of thoracic T5-8 was present, suggesting an extramedullary hematopoietic centre, compressing the spinal cord. He was treated successfully with thalassemia major alone...
August 23, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28844912/the-relevance-of-postoperative-magnetic-resonance-image-in-evaluating-the-epidural-hematoma-after-thoracic-fixation-surgery
#20
Hong Kyung Shin, Il Choi, Sung Woo Roh, Seung Chul Rhim, Sang Ryong Jeon
BACKGROUND: It is difficult to evaluate the significant findings of epidural hematoma in magnetic resonance image (MRI) obtained immediately after thoracic posterior screw fixation (PSF). METHODS: Prospectively, an immediate postoperative MRI was performed in 10 patients who underwent thoracic PSF from April to December 2013. Additionally, we retrospectively analysed the MRI from three patients before hematoma evacuation out of 260 patients who underwent thoracic PSF from January 2000 to March 2013...
August 24, 2017: World Neurosurgery
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