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Thoracic MRI

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https://www.readbyqxmd.com/read/28100198/mr-imaging-for-detection-of-trampoline-injuries-in-children
#1
E Hauth, H Jaeger, P Luckey, M Beer
BACKGROUND: The recreational use of trampolines is an increasingly popular activity among children and adolescents. Several studies reported about radiological findings in trampoline related injuries in children. The following publication presents our experience with MRI for detection of trampoline injuries in children. METHODS: 20 children (mean 9.2 years, range: 4-15 years) who had undergone an MRI study for detection of suspected trampoline injuries within one year were included...
January 18, 2017: BMC Pediatrics
https://www.readbyqxmd.com/read/28097251/management-of-progressive-late-onset-scoliosis-with-magnetic-growth-rod-insertion-leading-to-improvement-of-neural-anomalies-a-case-report
#2
Amit Zaveri, Valerio Pace, Dimpu Bhagawati, Vijay Rajamani, Thillainayagam Muthukumar, Hilali Noordeen
BACKGROUND: To present the first known reported case of late onset idiopathic scoliosis with concomitant neural anomalies, treated with sequential distraction using magnetic growth rod, had significant improvement in both cranio-cervical and intraspinal anomaly. METHODS: A caucasian, growing female child (at the age of ten) presented with moderately progressive late onset right thoracic scoliosis. She was found to have Chiari type I malformation and a cervicothoracic syrinx on routine pre-operative MRI scanning...
December 2016: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28079662/recognition-of-a-thoracic-epidural-hematoma-in-the-setting-of-transient-paralysis-a-case-report
#3
Beth VanderWielen, Lindsay Rubenstein, Marc Shnider, Cindy Ku, Jason Wakakuwa
A 71-year-old woman on aspirin presented for a distal pancreatectomy, splenectomy, and partial colectomy with a T8/9 epidural catheter placed preoperatively in 3 attempts. Prophylactic 5000 units of subcutaneous heparin were given before the procedure. After catheter removal on postoperative day 2, the patient developed transient bilateral lower extremity paralysis, with near complete recovery within 30 minutes. An urgent MRI revealed a T4-T8 epidural hematoma prompting an emergent T3-T8 laminectomy. This case presentation highlights the need for heightened awareness regarding complications related to neuraxial analgesia in patients receiving unfractionated heparin for thromboembolism prophylaxis with concurrent aspirin use...
January 11, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28067202/pulmonary-fibrosis-tissue-characterization-using-late-enhanced-mri-compared-with-unenhanced-anatomic-high-resolution-ct
#4
Lisa P Lavelle, Darragh Brady, Sinead McEvoy, David Murphy, Brian Gibney, Annika Gallagher, Marcus Butler, Fionnula Shortt, Marie McMullen, Aurelie Fabre, David A Lynch, Michael P Keane, Jonathan D Dodd
PURPOSE: We aimed to prospectively evaluate anatomic chest computed tomography (CT) with tissue characterization late gadolinium-enhanced magnetic resonance imaging (MRI) in the evaluation of pulmonary fibrosis (PF). METHODS: Twenty patients with idiopathic pulmonary fibrosis (IPF) and twelve control patients underwent late-enhanced MRI and high-resolution CT. Tissue characterization of PF was depicted using a segmented inversion-recovery turbo low-angle shot MRI sequence...
January 9, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28065376/dual-energy-ct-virtual-non-calcium-technique-for-detection-of-bone-marrow-edema-in-patients-with-vertebral-fractures-a-prospective-feasibility-study-on-a-single-source-volume-ct-scanner
#5
T Diekhoff, K G Hermann, M Pumberger, B Hamm, M Putzier, M Fuchs
OBJECTIVES: Dual-energy computed tomography (DECT) is a recent development for detecting bone marrow edema (BME) in patients with vertebral compression fractures. The aim of this pilot study was to determine the reliability of single-source DECT in detecting vertebral BME using magnetic resonance imaging (MRI) as standard of reference. MATERIALS AND METHODS: Nine patients with radiographic thoracic or lumbar vertebral compression fractures underwent both, DECT on a 320-row single-source scanner and 1...
February 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28059798/sporadic-cases-with-novel-mutations-and-pedigree-in-hereditary-leukoencephalopathy-with-axonal-spheroids
#6
Liyong Wu, Jia Liu, Longze Sha, Xianling Wang, Jieying Li, Jing Dong, Jianping Jia
Hereditary diffuse leukoencephalopathy with spheroids (HDLS) is an autosomal dominant hereditary disease, featured by cerebral white matter degeneration with demyelination and axonal spheroids. We collected three gene-confirmed HDLS cases in our neurodegenerative clinic. Two HDLS cases were sporadic with novel mutations, while another case had a family history with previously described mutations. All three cases suffered memory problems with white matter lesions and pyramid signs. No obvious clinical differences were observed between sporadic and familial HDLS cases...
December 3, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28057591/surgical-management-of-spontaneous-spinal-cerebrospinal-fluid-epidural-fistula
#7
Declan G Siedler, Imogen M Ibbett, Nova B Thani
BACKGROUND: Intracranial hypotension secondary to spontaneous spinal cerebrospinal fluid (CSF) fistula is a rare condition which can have serious sequelae. Early diagnosis and treatment can be challenging. CASE DESCRIPTION: We present a case of a 17-year-old man who presented with a history of sudden onset, postural headaches, associated with upper thoracic back pain. Magnetic Resonance Imaging (MRI) demonstrated a thoracic extradural fluid collection and slumping of the brain within the posterior fossa...
January 2, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28056595/concomitant-and-previous-osteoporotic-vertebral-fractures
#8
Markus Lenski, Natalie BüSer, Michael Scherer
Background and purpose - Patients with osteoporosis who present with an acute onset of back pain often have multiple fractures on plain radiographs. Differentiation of an acute osteoporotic vertebral fracture (AOVF) from previous fractures is difficult. The aim of this study was to investigate the incidence of concomitant AOVFs and previous OVFs in patients with symptomatic AOVFs, and to identify risk factors for concomitant AOVFs. Patients and methods - This was a prospective epidemiological study based on the Registry of Pathological Osteoporotic Vertebral Fractures (REPAPORA) with 1,005 patients and 2,874 osteoporotic vertebral fractures, which has been running since February 1, 2006...
January 6, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28050972/registration-of-mri-to-intraoperative-radiographs-for-target-localization-in-spinal-interventions
#9
T De Silva, A Uneri, M D Ketcha, S Reaungamornrat, J Goerres, M W Jacobson, S Vogt, G Kleinszig, A J Khanna, J-P Wolinsky, J H Siewerdsen
Decision support to assist in target vertebra localization could provide a useful aid to safe and effective spine surgery. Previous solutions have shown 3D-2D registration of preoperative CT to intraoperative radiographs to reliably annotate vertebral labels for assistance during level localization. We present an algorithm (referred to as MR-LevelCheck) to perform 3D-2D registration based on a preoperative MRI to accommodate the increasingly common clinical scenario in which MRI is used instead of CT for preoperative planning...
January 4, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28048615/tu-h-202-04-the-vampire-challenge-preliminary-results-from-a-multi-institutional-study-of-ct-ventilation-image-accuracy
#10
J Kipritidis
: CT ventilation imaging is an exciting functional imaging modality that combines four-dimensional computed tomography (4DCT) and deformable image registration (DIR) to provide exquisite ventilation maps of the lung. CT ventilation imaging can be used for: (1) Functional avoidance in thoracic radiation therapy, (2) Imaging longitudinal changes in regional lung function for treatment assessment and adaptation, (3) Image-assisted diagnosis of non-oncologic respiratory diseases. CT ventilation imaging uses CT, a predominantly anatomic imaging modality, and through imaging processing creates functional images...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048557/tu-h-202-00-ct-ventilation-imaging-the-new-clinical-reality-of-functional-avoidance-and-response-assessment-in-lung-cancer-radiation-therapy
#11
Paul Keall
: CT ventilation imaging is an exciting functional imaging modality that combines four-dimensional computed tomography (4DCT) and deformable image registration (DIR) to provide exquisite ventilation maps of the lung. CT ventilation imaging can be used for: (1) Functional avoidance in thoracic radiation therapy, (2) Imaging longitudinal changes in regional lung function for treatment assessment and adaptation, (3) Image-assisted diagnosis of non-oncologic respiratory diseases. CT ventilation imaging uses CT, a predominantly anatomic imaging modality, and through imaging processing creates functional images...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048366/su-f-t-632-on-the-use-of-intensity-modulated-arc-therapy-for-thoracic-vertebral-metastases-sbrt-treatment
#12
D Pokhrel, M Mallory, R Badkul, H Jiang, H Saleh, F Wang, C Lominska
PURPOSE: To retrospectively evaluate quality, efficiency and delivery accuracy of intensity modulated arc therapy (IMAT) plans for thoracic-vertebral metastases using stereotactic body radiotherapy (SBRT). METHODS: After obtaining approval of RPC-benchmark plan, seven previously treated thoracic-vertebral metastases patients with non-coplanar hybrid arcs(NC-HA)using 1-2 3D-dynamic conformal partial-arcs plus 7-9 IMRT-beams were re-optimized with IMAT using 3 full co-planar arcs...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048323/su-d-207a-05-investigating-sparse-sampled-mri-for-motion-management-in-thoracic-radiotherapy
#13
P Sabouri, T Arai, A Sawant
PURPOSE: Sparse sampling and reconstruction-based MRI techniques represent an attractive strategy to achieve sufficiently high image acquisition speed while maintaining image quality for the task of radiotherapy guidance. In this study, we examine rapid dynamic MRI using a sparse sampling sequence k-t BLAST in capturing motion-induced, cycle-to-cycle variations in tumor position. We investigate the utility of long-term MRI-based motion monitoring as a means of better characterizing respiration-induced tumor motion compared to a single-cycle 4DCT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048110/su-f-j-102-lower-esophagus-margin-implications-based-on-rapid-computational-algorithm-for-sbrt
#14
M Cardenas, T Mazur, H Li, S Mutic, J Bradley, C Tsien, O Green
PURPOSE: To quantify inter-fraction esophagus-variation. METHODS: Computed tomography and daily on-treatment 0.3-T MRI data sets for 7 patients were analyzed using a novel Matlab-based (Mathworks, Natick, MA) rapid computational method. Rigid registration was performed from the cricoid to the gastro-esophageal junction. CT and MR-based contours were compared at slice intervals of 3mm. Variation was quantified by "expansion," defined as additional length in any radial direction from CT contour to MR contour...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047895/tu-h-202-01-introduction-to-ct-ventilation-imaging-principles-validation-and-clinical-translation
#15
T Yamamoto
: CT ventilation imaging is an exciting functional imaging modality that combines four-dimensional computed tomography (4DCT) and deformable image registration (DIR) to provide exquisite ventilation maps of the lung. CT ventilation imaging can be used for: (1) Functional avoidance in thoracic radiation therapy, (2) Imaging longitudinal changes in regional lung function for treatment assessment and adaptation, (3) Image-assisted diagnosis of non-oncologic respiratory diseases. CT ventilation imaging uses CT, a predominantly anatomic imaging modality, and through imaging processing creates functional images...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047616/su-g-iep1-08-mr-geometric-distortion-dependency-on-imaging-sequence-acquisition-orientation-and-receiver-bandwidth-of-a-dedicated-1-5t-mr-simulator
#16
M Law, J Yuan, O Wong, S Yu
PURPOSE: To investigate the 3D geometric distortion of four potential MR sequences for radiotheraptic applications, and its dependency on sequence-type, acquisition-orientation and receiver-bandwidth from a dedicated 1.5T 700mm-wide bore MR-simulator (Magnetom-Aera, Sienmens Healthcare, Erlangen, Germany), using a large customized geometric accuracy phantom. METHODS: This work studied 3D gradient-echo (VIBE) and spin-echo (SPACE) sequences for anatomical imaging; a specific ultra-short-TE sequence (PETRA) potentially for bone imaging and MR-based dosimetry; and a motion-insensitive sequence (BLADE) for dynamic applications like 4D-MRI...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047233/tu-h-202-02-applications-validation-clinical-endpoints-and-opportunities-for-ct-ventilation
#17
Y Vinogradskiy
: CT ventilation imaging is an exciting functional imaging modality that combines four-dimensional computed tomography (4DCT) and deformable image registration (DIR) to provide exquisite ventilation maps of the lung. CT ventilation imaging can be used for: (1) Functional avoidance in thoracic radiation therapy, (2) Imaging longitudinal changes in regional lung function for treatment assessment and adaptation, (3) Image-assisted diagnosis of non-oncologic respiratory diseases. CT ventilation imaging uses CT, a predominantly anatomic imaging modality, and through imaging processing creates functional images...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046563/tu-h-202-03-spatial-distributions-of-radiation-induced-pulmonary-changes-can-be-modeled-and-utilized-for-image-guided-planning-and-therapy-to-improve-pulmonary-function-preservation-and-hence-the-therapeutic-ratio-for-lung-cancer
#18
J Bayouth
: CT ventilation imaging is an exciting functional imaging modality that combines four-dimensional computed tomography (4DCT) and deformable image registration (DIR) to provide exquisite ventilation maps of the lung. CT ventilation imaging can be used for: (1) Functional avoidance in thoracic radiation therapy, (2) Imaging longitudinal changes in regional lung function for treatment assessment and adaptation, (3) Image-assisted diagnosis of non-oncologic respiratory diseases. CT ventilation imaging uses CT, a predominantly anatomic imaging modality, and through imaging processing creates functional images...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046551/we-ab-bra-09-registration-of-preoperative-mri-to-intraoperative-radiographs-for-automatic-vertebral-target-localization
#19
T De Silva, A Uneri, M Ketcha, S Reaungamornrat, J Goerres, S Vogt, G Kleinszig, J Wolinsky, J H Siewerdsen
PURPOSE: Accurate localization of target vertebrae is essential to safe, effective spine surgery, but wrong-level surgery occurs with surprisingly high frequency. Recent research yielded the "LevelCheck" method for 3D-2D registration of preoperative CT to intraoperative radiographs, providing decision support for level localization. We report a new method (MR-LevelCheck) to perform 3D-2D registration based on preoperative MRI, presenting a solution for the increasingly common scenario in which MRI (not CT) is used for preoperative planning...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28038775/spinal-cord-lesions-in-children-and-adolescents-with-multiple-sclerosis-magnetic-resonance-imaging
#20
Joanna Dębska, Katarzyna Kotulska-Józwiak, Piotr Pawliszak, Małgorzata Bilska, Dariusz Chmielewski, Iwona Puzio, Elżbieta Jurkiewicz
PURPOSE: The purpose of our study was to determine the prevalence of spinal cord lesions revealed by magnetic resonance (MR) imaging in children and adolescents with clinically definite multiple sclerosis (MS). MATERIAL AND METHODS: We retrospectively evaluated the spinal cord magnetic resonance examinations in a group of MS patients consisting of 58 children (37 girls and 21 boys) aged from 7 to 17.8 years (mean 13.7 years). All children met the criteria of clinically definite MS and had typical MS lesions revealed in the brain imaging...
December 14, 2016: Neurologia i Neurochirurgia Polska
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