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https://www.readbyqxmd.com/read/28231577/response-evaluation-in-head-and-neck-oncology-definition-and-prediction
#1
T K Hoffmann, P J Schuler, S Laban, R Grässlin, M Beer, A J Beer, U Friebe-Hoffmann, L Bullinger, P Möller, T Wiegel
Curative treatment of head and neck squamous cell carcinoma includes surgery and/or (chemo)radiation, whereas in the palliative setting, chemotherapy and/or immunotherapy represent(s) the standard approach. With regard to quality control, methods for determining treatment response are sorely needed. For surgical therapy, histopathology is the standard quality control. Established criteria for high-risk patients include resection margins of the primary tumor and extracapsular extension of lymph node metastases...
February 24, 2017: ORL; Journal for Oto-rhino-laryngology and its related Specialties
https://www.readbyqxmd.com/read/28231555/edge-preserving-denoising-for-intra-operative-cone-beam-ct-in-endovascular-aneurysm-repair
#2
Yi Liu, Miguel Castro, Mathieu Lederlin, Huazhong Shu, Adrien Kaladji, Pascal Haigron
C-arm cone-beam computed tomography (CBCT) acquisition during endovascular aneurysm repair (EVAR) is an emergent technology with more and more applications. It offers real time imaging with a stationary patient and provides 3-D information to achieve guidance of intervention. However, there is growing concern on the overall radiation doses delivered to patients all along the endovascular management due to pre-, intra-, and post-operative X-ray imaging. Manufactures may have their low dose protocols to realize reduction of radiation dose, but CBCT with a low dose protocol has too many artifacts, particularly streak artifacts, and decreased contrast-to-noise ratio (CNR)...
January 30, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28231370/significance-of-imaging-in-the-diagnosis-of-olfactory-disorder
#3
Teemu Harju, Markus Rautiainen, Ilkka Kivekäs
The aim of this retrospective analysis was to examine olfactory disorders among the patients in the Ear, Nose, and Throat Clinic of Tampere University Hospital, Finland, from 2001 to 2011, and to evaluate the necessity of imaging in the examination of patients with olfactory disorders. Charts of 143 consecutive patients with a primary olfactory disorder were examined, and 69 patients who had undergone the necessary testing were included in the study. The most common causes of olfactory disorder were upper respiratory infection (23%), chronic rhinosinusitis (19%), head trauma (17%), and allergic or nonallergic rhinitis (6%)...
February 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28231322/clinical-evaluation-of-new-automatic-coronary-specific-best-cardiac-phase-selection-algorithm-for-single-beat-coronary-ct-angiography
#4
Hui Wang, Lei Xu, Zhanming Fan, Junfu Liang, Zixu Yan, Zhonghua Sun
The aim of this study was to evaluate the workflow efficiency of a new automatic coronary-specific reconstruction technique (Smart Phase, GE Healthcare-SP) for selection of the best cardiac phase with least coronary motion when compared with expert manual selection (MS) of best phase in patients with high heart rate. A total of 46 patients with heart rates above 75 bpm who underwent single beat coronary computed tomography angiography (CCTA) were enrolled in this study. CCTA of all subjects were performed on a 256-detector row CT scanner (Revolution CT, GE Healthcare, Waukesha, Wisconsin, US)...
2017: PloS One
https://www.readbyqxmd.com/read/28231320/improved-image-quality-and-diagnostic-potential-using-ultra-high-resolution-computed-tomography-of-the-lung-with-small-scan-fov-a-prospective-study
#5
Huiyuan Zhu, Lian Zhang, Yali Wang, Preeti Hamal, Xiaofang You, Haixia Mao, Fei Li, Xiwen Sun
The aim of this study was to assess whether CT imaging using an ultra-high-resolution CT (UHRCT) scan with a small scan field of view (FOV) provides higher image quality and helps to reduce the follow-up period compared with a conventional high-resolution CT (CHRCT) scan. We identified patients with at least one pulmonary nodule at our hospital from July 2015 to November 2015. CHRCT and UHRCT scans were conducted in all enrolled patients. Three experienced radiologists evaluated the image quality using a 5-point score and made diagnoses...
2017: PloS One
https://www.readbyqxmd.com/read/28230915/a-singlet-oxygen-generating-agent-by-chirality-dependent-plasmonic-shell-satellite-nanoassembly
#6
Fengli Gao, Maozhong Sun, Wei Ma, Xiaoling Wu, Liqiang Liu, Hua Kuang, Chuanlai Xu
Photodynamic therapy (PDT) agent, which generates singlet oxygen ((1) O2 ) under light, has attracted significant attention for its broad biological and medical applications. Here, DNA-driven shell-satellite (SS) gold assemblies as chiral photosensitizers are first fabricated. The chiral plasmonic nanostructure, coupling with cysteine enantiomers on its surface, exhibits intense chiroplasmonic activities (-40.2 ± 2.6 mdeg) in the visible region. These chiral SS nanoassemblies have high reactive oxygen species generating efficiency under circular polarized light illumination, resulting in a (1) O2 quantum yield of 1...
February 23, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28230623/safety-and-accuracy-of-freehand-versus-navigated-iliac-screws-results-from-222-screw-placements
#7
Randall J Hlubek, Kaith K Almefty, David S Xu, Jay D Turner, U Kumar Kakarla
STUDY DESIGN: Retrospective review. OBJECTIVE: To compare the safety and accuracy of the freehand technique versus stereotactic navigation for placement of iliac screws. SUMMARY OF BACKGROUND DATA: Iliac screw fixation is often used to augment lumbosacral reconstruction in advanced spine disease to increase the likelihood of successful arthrodesis. Iliac screws can be placed with image guidance, using either intraoperative fluoroscopy or computed tomography (CT) to guide navigation...
February 22, 2017: Spine
https://www.readbyqxmd.com/read/28230608/specialized-imaging-and-procedures-in-pediatric-pancreatology-a-north-american-society-for-pediatric-gastroenterology-hepatology-and-nutrition-clinical-report
#8
Tom K Lin, David M Troendle, Daniel B Wallihan, Bradley Barth, Victor L Fox, Douglas S Fishman, Veronique D Morinville
OBJECTIVES: An increasing number of children are being diagnosed with pancreatitis and other pancreatic abnormalities. Dissemination of the information regarding existing imaging techniques and endoscopic modalities to diagnose and manage pancreatic disorders in children is sorely needed. METHODS: We conducted a review of the medical literature on the use of the following imaging and procedural modalities in pediatric pancreatology: transabdominal ultrasonography (TUS), computed tomography (CT), magnetic resonance imaging (MRI)/magnetic resonance cholangiopancreatography (MRCP), endoscopic ultrasonography (EUS), and endoscopic retrograde cholangiopancreatography (ERCP)...
March 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28230539/polyenergetic-known-component-ct-reconstruction-with-unknown-material-compositions-and-unknown-x-ray-spectra
#9
Shiyu Xu, Ali Uneri, Akhil Khanna, Jeffrey Siewerdsen, Joseph Webster Stayman
Metal artifacts can cause substantial image quality issues in computed tomography. This is particularly true in interventional imaging where surgical tools or metal implants are in the field-of-view. Moreover, the region-of-interest is often near such devices which is exactly where image quality degradations are largest. Previous work on known-component reconstruction (KCR) has shown the incorporation of a physical model (e.g. shape, material composition, etc.) of the metal component into the reconstruction algorithm can significantly reduce artifacts even near the edge of a metal component...
February 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28230026/the-diagnostic-value-of-contrast-enhanced-computed-tomography-imaging-for-detection-of-colorectal-tumors-a-meta-analysis
#10
Qing Yu, Jie Liu
OBJECTIVE: To evaluate the application usage of contrast-enhanced computer tomography imaging for colorectal tumors diagnosis. METHODS: By searching the Medline and CNKI databases, we collected all diagnostic tests about contrast-enhanced CT imaging for colorectal tumors. Sensitivity and specificity were calculated to evaluate the usage of individual diagnostic tests. The data were analyzed using statistic software Meta-DiSc 1.4. RESULTS: Nine trials that included a total of 4797 patients were analyzed in this study...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28230009/effect-of-heat-sink-on-the-recurrence-of-small-malignant-hepatic-tumors-after-radiofrequency-ablation
#11
Zheng-Yu Lin, Guo-Lin Li, Jin Chen, Zhong-Wu Chen, Yi-Ping Chen, Sun-Zhi Lin
AIMS: The aim of this study was to investigate the effect of heat sink on the recurrence of hepatic malignant tumors <3 cm after percutaneous radiofrequency ablation (RFA). SUBJECTS AND METHODS: This study included 564 hepatic malignant tumors <3 cm in 381 patients. Preoperative images were used to determine whether these tumors were adjacent to vessels, and the diameter of adjacent vessels was measured. RFA was performed computed tomography (CT), magnetic resonance imaging (MRI) and ultrasound (US) guidance, and postoperative imaging follow-up was then conducted...
December 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28229910/optimized-energy-of-spectral-ct-for-infarct-imaging-experimental-validation-with-human-validation
#12
Veit Sandfort, Srikanth Palanisamy, Rolf Symons, Amir Pourmorteza, Mark A Ahlman, Kelly Rice, Tom Thomas, Cynthia Davies-Venn, Bernhard Krauss, Alan Kwan, Ankur Pandey, Stefan L Zimmerman, David A Bluemke
OBJECTIVES: Late contrast enhancement visualizes myocardial infarction, but the contrast to noise ratio (CNR) is low using conventional CT. The aim of this study was to determine if spectral CT can improve imaging of myocardial infarction. MATERIALS AND METHODS: A canine model of myocardial infarction was produced in 8 animals (90-min occlusion, reperfusion). Later, imaging was performed after contrast injection using CT at 90 kVp/150 kVpSn. The following reconstructions were evaluated: Single energy 90 kVp, mixed, iodine map, multiple monoenergetic conventional and monoenergetic noise optimized reconstructions...
February 11, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28229318/contribution-of-computed-tomographic-imaging-to-the-management-of-acute-abdominal-pain-after-gastric-bypass-correlation-between-radiological-and-surgical-findings
#13
Pascale Karila-Cohen, Francesco Cuccioli, Pasquale Tammaro, Anne-Laure Pelletier, Daniel Gero, Jean-Pierre Marmuse, Jean-Pierre Laissy, Konstantinos Arapis
BACKGROUND: We evaluated the diagnostic accuracy of first interpretations of computed tomographic (CT) images and blind interpretation using predefined CT signs in patients with previous Roux-en-Y gastric bypass (RYGBP) and acute abdominal pain. METHODS: We performed a retrospective chart review of patients with RYGBP who underwent surgical exploration from January 2009 to December 2014 for acute abdominal pain in our university institution, excluding patients without CT scan and comparing initial CT imaging interpretation with surgical findings...
February 22, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28229315/the-utility-of-diagnostic-laparoscopy-in-post-bariatric-surgery-patients-with-chronic-abdominal-pain-of-unknown-etiology
#14
Mohammad Alsulaimy, Suriya Punchai, Fouzeyah A Ali, Matthew Kroh, Philip R Schauer, Stacy A Brethauer, Ali Aminian
PURPOSE: Chronic abdominal pain after bariatric surgery is associated with diagnostic and therapeutic challenges. The aim of this study was to evaluate the yield of laparoscopy as a diagnostic and therapeutic tool in post-bariatric surgery patients with chronic abdominal pain who had negative imaging and endoscopic studies. METHODS: A retrospective analysis was performed on post-bariatric surgery patients who underwent laparoscopy for diagnosis and treatment of chronic abdominal pain at a single academic center...
February 22, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28229271/new-pet-ct-criterion-for-nodal-staging-in-non-small-cell-lung-cancer-measurement-of-the-ratio-of-section-area-of-standard-uptake-values-%C3%A2-2-5-lymph-node-section-area
#15
Yoshitaro Saito, Kazuhiro Imai, Koichi Ishiyama, Hajime Saito, Satoru Motoyama, Yusuke Sato, Hayato Konno, Satoshi Fujishima, Manabu Hashimoto, Yoshihiro Minamiya
BACKGROUND: The aim of the present study was to use surgical and histological results to develop a simple noninvasive technique for improving nodal staging using preoperative PET/CT in patients with resectable non-small cell lung cancer (NSCLC). METHODS: Preoperative PET/CT findings (163 patients) and pathological diagnoses after surgical resection were evaluated. Using PET/CT images, lymph node section area (SA), the maximum standardized uptake value (SUVmax), SA of SUV ≥2...
February 23, 2017: General Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28229225/implications-of-sdhb-genetic-testing-in-patients-with-sporadic-pheochromocytoma
#16
Aurelie Maignan, Carole Guerin, Valentin Julliard, Nunzia-Cinzia Paladino, Edward Kim, Philippe Roche, Fréderic Castinetti, Wassim Essamet, Julien Mancini, Alessio Imperiale, Roderick Clifton-Bligh, Pauline Romanet, Anne Barlier, Karel Pacak, Fréderic Sebag, David Taïeb
PURPOSE: Succinate dehydrogenase B (SDHB) associated pheochromocytomas (PHEOs) are associated with a higher risk of tumor aggressiveness and malignancy. The aim of the present study was to evaluate (1) the frequency of germline SDHB mutations in apparently sporadic patients with PHEO who undergo preoperative genetic testing and (2) the ability to predict pathogenic mutations. METHODS: From 2012 to 2016, 82 patients underwent a PHEO surgical resection. Sixteen were operated in the context of hereditary PHEO and were excluded from analysis...
February 22, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28229191/-18-f-fdg-pet-ct-imaging-versus-bone-marrow-biopsy-in-pediatric-hodgkin-s-lymphoma-a-quantitative-assessment-of-marrow-uptake-and-novel-insights-into-clinical-implications-of-marrow-involvement
#17
Aamna Hassan, Maimoona Siddique, Humayun Bashir, Saima Riaz, Rabia Wali, Asma Mahreen, M Khalid Nawaz
OBJECTIVE: To evaluate whether positron emission tomography/computed tomography using fluorine-18 fluoro-deoxyglucose ((18)F-FDG PET-CT) predicts bone marrow involvement (BMI) in pediatric Hodgkin's lymphoma (pHL) with sufficient accuracy to supplant routine staging bone marrow biopsy (BMB), and to assess the clinical importance of marrow disease by comparing the prognosis of stage IV HL with BMI versus that without BMI. METHODS: Data were retrospectively analyzed for all cases of pHL between July 2010 and June 2015 referred for staging (18)F-FDG PET-CT scan and BMB...
February 22, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28229056/experimental-visualization-of-labyrinthine-structure-with-optical-coherence-tomography
#18
Saleh Mohebbi, Marjan Mirsalehi, Lüder-Alexander Kahrs, Tobias Ortmaier, Thomas Lenarz, Omid Majdani
INTRODUCTION: Visualization of inner ear structures is a valuable strategy for researchers and clinicians working on hearing pathologies. Optical coherence tomography (OCT) is a high-resolution imaging technology which may be used for the visualization of tissues. In this experimental study we aimed to evaluate inner ear anatomy in well-prepared human labyrinthine bones. MATERIALS AND METHODS: Three fresh human explanted temporal bones were trimmed, chemically decalcified with ethylenediaminetetraacetic acid (EDTA), and mechanically drilled under visual control using OCT in order to reveal the remaining bone shell...
January 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28228934/osteosarcoma-follow-up-chest-x-ray-or-computed-tomography
#19
Anna Paioli, Michele Rocca, Luca Cevolani, Eugenio Rimondi, Daniel Vanel, Emanuela Palmerini, Marilena Cesari, Alessandra Longhi, Abate Massimo Eraldo, Emanuela Marchesi, Piero Picci, Stefano Ferrari
BACKGROUND: In patients with relapsed osteosarcoma, the surgical excision of all metastases, defined as second complete remission (CR-2), is the factor that mainly influences post-relapse survival (PRS). Currently a validated follow-up policy for osteosarcoma is not available, both chest X-ray and computed tomography (CT) are suggested for lung surveillance. The purpose of this study is to evaluate whether the type of imaging technique used for chest surveillance, chest X-ray or CT, influenced the rate of CR-2 and prognosis in patients with recurrent osteosarcoma...
2017: Clinical Sarcoma Research
https://www.readbyqxmd.com/read/28228878/pancreatic-cancer-seeding-of-percutaneous-needle-tract
#20
Qiao Zhou, Shashi Murthy, Harlan Vingan
A 65-year old African-American female presents with biliary ductal dilatation due to an obstructive pancreatic head mass. Percutaneous transhepatic cholangiogram performed and biliary drainage catheter placement for decompression of the biliary system. The patient had a Whipple procedure performed several months later. On follow up CT imaging, there was interval development and enlargement of a subcutaneous lesion by the right oblique muscles. Biopsy of this lesion revealed pancreatic adenocarcinoma from percutaneous seeding of the transhepatic needle tract...
March 2017: Radiology case reports
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