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https://www.readbyqxmd.com/read/28934810/cross-sectional-imaging-of-solitary-lesions-of-the-neurocranium
#1
Max-Ludwig Schäfer, Arend Koch, Florian Streitparth, Edzard Wiener
Background Although a wide range of processes along the neurocranium are of a benign nature, there are often difficulties in the differential diagnosis. Method In the review CT/MRI scans of the head were evaluated retrospectively regarding solitary lesions along the neurocranium. The majority of the lesions were histologically proven. Results The purpose of the review is to present typical pathologies of the neurocranium and provide a systematic overview based on 12 entities, their locations, prevalence and radiological characteristics...
September 21, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28934809/ct-and-mri-techniques-for-imaging-around-orthopedic-hardware
#2
Thuy Duong Do, Reto Sutter, Stephan Skornitzke, Marc-André Weber
Orthopedic hardware impairs image quality in cross-sectional imaging. With an increasing number of orthopedic implants in an aging population, the need to mitigate metal artifacts in computed tomography and magnetic resonance imaging is becoming increasingly relevant. This review provides an overview of the major artifacts in CT and MRI and state-of-the-art solutions to improve image quality. All steps of image acquisition from device selection, scan preparations and parameters to image post-processing influence the magnitude of metal artifacts...
September 21, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28934801/increasing-rates-of-imaging-in-failed-back-surgery-syndrome-patients-implications-for-spinal-cord-stimulation
#3
S Harrison Farber, Jing L Han, Frank W Petraglia Iii, Robert Gramer, Siyun Yang, Promila Pagadala, Beth Parente, Jichun Xie, Jeffrey R Petrella, Shivanand P Lad
BACKGROUND: Failed back surgery syndrome (FBSS) has a high incidence following spinal surgery, is notoriously refractory to treatment, and results in high health care utilization. Spinal cord stimulation (SCS) is a well-accepted modality for pain relief in this population; however, until recently magnetic resonance imaging (MRI) was prohibited due to risk of heat conduction through the device. OBJECTIVES: We examined trends in imaging use over the past decade in patients with FBSS to determine its impact on health care utilization and implications for patients receiving SCS...
September 2017: Pain Physician
https://www.readbyqxmd.com/read/28934535/quantification-of-imaging-error-in-the-measurement-of-cup-position-a-cadaveric-comparison-of-radiographic-and-computed-tomography-imaging
#4
Ran Schwarzkopf, Jonathan M Vigdorchik, Theodore T Miller, Eric A Bogner, Jeffrey M Muir, Michael B Cross
Postoperative radiographs remain the standard for assessment of component placement following total hip arthroplasty (THA), despite the known limitations of radiographs. Computed tomography (CT) scanning offers improved accuracy, but its costs and radiation exposure are prohibitive. The authors performed a cadaver study to compare the error associated with radiographs with that of CT scans following THA. The authors also compared imaging with a novel mini-navigation system. Three board-certified orthopedic surgeons each performed 4 THA procedures (6 cadavers, 12 hips) via the posterior approach using a mini-navigation tool to assist with component placement...
September 21, 2017: Orthopedics
https://www.readbyqxmd.com/read/28934225/harmonizing-the-pixel-size-in-retrospective-computed-tomography-radiomics-studies
#5
Dennis Mackin, Xenia Fave, Lifei Zhang, Jinzhong Yang, A Kyle Jones, Chaan S Ng, Laurence Court
Consistent pixel sizes are of fundamental importance for assessing texture features that relate intensity and spatial information in radiomics studies. To correct for the effects of variable pixel sizes, we combined image resampling with Butterworth filtering in the frequency domain and tested the correction on computed tomography (CT) scans of lung cancer patients reconstructed 5 times with pixel sizes varying from 0.59 to 0.98 mm. One hundred fifty radiomics features were calculated for each preprocessing and field-of-view combination...
2017: PloS One
https://www.readbyqxmd.com/read/28933972/visual-acuity-and-macular-and-peripapillary-thickness-in-high-myopia
#6
Solmaz Abdolrahimzadeh, Francesco Parisi, Andrea Maria Plateroti, Federica Evangelista, Vito Fenicia, Gianluca Scuderi, Santi Maria Recupero
PURPOSE: To investigate best corrected visual acuity (BCVA), and choroidal and retinal thickness values between high myopes without myopic maculopathy and emmetropes. MATERIALS AND METHODS: Case control study where 53 myopes with axial length (AL) above 26 mm without myopic maculopathy and 53 age-matched emmetropes with AL between 21.50 and 24.50 were included as controls. Complete ophthalmological examination and biometry were performed. Choroidal and individual retinal layer thickness maps using spectral domain optical coherence tomography were obtained in the macular and peripapillary area with enhanced depth imaging...
September 21, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28933018/-18-f-fluoromisonidazole-pet-in-rectal-cancer
#7
Tanuj Puri, Tessa A Greenhalgh, James M Wilson, Jamie Franklin, Lia Mun Wang, Victoria Strauss, Chris Cunningham, Mike Partridge, Tim Maughan
BACKGROUND: There is an increasing interest in developing predictive biomarkers of tissue hypoxia using functional imaging for personalised radiotherapy in patients with rectal cancer that are considered for neoadjuvant chemoradiotherapy (CRT). The study explores [(18)F]fluoromisonidazole ([(18)F]FMISO) positron emission tomography (PET) scans for predicting clinical response in rectal cancer patients receiving neoadjuvant CRT. METHODS: Patients with biopsy-proven rectal adenocarcinoma were imaged at 0-45 min, 2 and 4 h, at baseline and after 8-10 fractions of CRT (week 2)...
September 20, 2017: EJNMMI Research
https://www.readbyqxmd.com/read/28932594/misdiagnosis-of-anomalous-pulmonary-venous-connections-in-a-patient-with-lung-cancer-and-a-review-of-the-literature
#8
Nicola Tamburini, Irene Marchi, Matteo Bassi, Gabriele Anania, Francesco Quarantotto, Giorgio Cavallesco, Pio Maniscalco
A partial anomalous pulmonary venous connection (PAPVC) is a rare congenital defect in which at least one pulmonary vein doesn't drain into the left atrium but into a systemic vein or even into the right atrium, causing a left-to right shunt. PAPVC with a small amount of shunt are usually asymptomatic, and can not be detected during lifetime. Nevertheless, if those patients undergo a major lung resection, the surgical procedure could precipitate right heart failure if this anomalous shunt remains uncorrected...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932548/predictors-of-conversion-to-thoracotomy-during-video-assisted-thoracoscopic-surgery-lobectomy-in-lung-cancer-additional-predictive-value-of-fdg-pet-ct-in-a-tuberculosis-endemic-region
#9
Chun Geun Lim, Kyung Min Shin, Ji Seun Lim, Jae Kwang Lim, Hye Jung Kim, Won Hwa Kim, Seung Hyun Cho, Seung Ick Cha, Eung Bae Lee, Yangki Seock, Shin Young Jeong
BACKGROUND: To evaluate the added clinical value of (18)F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) scans to chest CT imaging in predicting the conversion to thoracotomy during video-assisted thoracoscopic surgery (VATS) lobectomy in patients with lung cancer. METHODS: This is a retrospective study of 235 consecutive patients who underwent planned VATS lobectomy for primary lung cancer between 2011 and 2015. CT images were interpreted in terms of the presence and the attenuation of peribronchial lymph nodes (PLN) and peribronchial cuffs of soft (PCS) tissue, pleural calcification, and parenchymal calcified nodule...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28932374/stroke-mimics-in-patients-with-clinical-signs-of-stroke
#10
Mozafar Hosseininezhad, Reza Sohrabnejad
BACKGROUND: Stroke mimic is a major diagnostic challenge and may be difficult to distinguish from real strokes. The aim of this study was to evaluate the relative frequency of stroke mimics in patients with clinical signs of stroke. METHODS: In this cross sectional-study, the medical records of 1985 patients with stroke admitted to Poursina Hospital were enrolled using the census technique. Data collection tool was a checklist which include age, sex, imaging results (MRI and CT scan and primary and final diagnoses...
2017: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/28931260/stereotactic-accuracy-and-surgical-utility-of-the-o-arm-in-deep-brain-stimulation-surgery
#11
Jonathan Dennis Carlson, Kate Elizabeth McLeod, Pamela Sue McLeod, Jamelynn Brooke Mark
BACKGROUND: The stereotactic accuracy of intraoperative imaging is critical to clinical outcome, particularly in "asleep" deep brain stimulation (DBS) surgery that typically forgoes neurophysiological techniques. Different intraoperative imaging modalities and associated accuracies have been reported, including magnetic resonance imaging (MRI), computed tomography (CT), and O-arm. OBJECTIVE: To analyze intraoperative O-arm imaging accuracy and to evaluate the utility of microelectrode mapping...
February 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28930951/routine-computed-tomography-after-recent-operative-exploration-for-penetrating-trauma-what-injuries-do-we-miss
#12
April E Mendoza, Christopher A Wybourn, Anthony G Charles, Andre R Campbell, Bruce A Cairns, Margaret M Knudson
BACKGROUND: Patients with penetrating trauma who cannot be stabilized undergo operative intervention without preoperative imaging. In such cases, postoperative imaging may reveal additional injuries not identified during the initial operative exploration. The purpose of this study is to explore the utility of postoperative CT imaging in the setting of penetrating trauma. METHODS: This was a retrospective analysis of patients with penetrating trauma treated at an urban Level 1 trauma center between 2010 and 2015...
October 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28930944/negative-ct-can-safely-rule-out-clinically-significant-intra-abdominal-injury-in-the-asymptomatic-patient-after-blunt-trauma-prospective-evaluation-of-1193-patients
#13
Elizabeth Benjamin, Jayun Cho, Gustavo Recinos, Evren Dilektasli, Lydia Lam, John Brunner, Kenji Inaba, Demetrios Demetriades
BACKGROUND: Computed tomography of the abdomen and pelvis (CTAP) is highly specific for injury identification and commonly used in the evaluation of blunt trauma patients. Despite this, there is no consensus on the required clinical observation period after negative imaging, often impacting patient flow and hospital cost. The purpose of this study was to evaluate the use of CTAP after blunt trauma and the need for observation following negative imaging. METHODS: A prospective analysis at a large level I trauma center was conducted from 11/2014-5/2015...
September 20, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28930942/surgical-residents-interpretation-of-diagnostic-radiologic-imaging-in-the-traumatically-injured-patient
#14
Elias Fakhoury, Daria Abolghasemi, Justin McKinney, Alena Naumova, Scott Wessner, Osama Elsawy, Jamshed Zuberi, Robert V Madlinger
BACKGROUND: Senior surgical residents are of paramount importance in directing further therapeutic modalities based on their interpretation of critical diagnostic imaging. We propose that senior surgical residents are proficient with interpreting radiologic imaging studies in the trauma patient. METHODS: A prospective cohort study was performed comparing surgery resident interpretations of computerized tomography (CT) scans of the head, maxillofacial bones, spine (cervical, thoracic, lumbar), chest, abdomen, pelvis, and chest X-rays versus final radiologists' reports at a level II trauma center from September 2014 to May 2015...
September 20, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28930828/18f-fdg-pet-ct-in-preoperative-staging-of-vulvar-cancer-patients-is-it-really-effective
#15
Cinzia Crivellaro, Priscilla Guglielmo, Elena De Ponti, Federica Elisei, Luca Guerra, Sonia Magni, Maria La Manna, Giampaolo Di Martino, Claudio Landoni, Alessandro Buda
The aim of this study was to assess the role of 18F-FDG PET/CT in preoperative staging of vulvar cancer patients.29 pts (69 years, range 51-88) with vulvar cancer (clinical apparent stage I-II), underwent preoperative FDG-PET/CT scan followed by radical vulvectomy and bilateral (or monolateral in case of tumor >2 cm from midline) inguinal lymphadenectomy ± sentinel node biopsy. PET/CT images were analyzed in consensus and correlated to histological findings according to a pt-based and a groin-based analyses...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28930092/a-monte-carlo-study-to-assess-the-effect-of-1-5t-magnetic-fields-on-the-overall-robustness-of-pencil-beam-scanning-proton-radiotherapy-plans-for-prostate-cancer
#16
Christopher Kurz, Guillaume Landry, Andreas Franz Resch, Georgios Dedes, Florian Kamp, Ute Ganswindt, Claus Belka, Bas W Raaymakers, Katia Parodi
Combining magnetic-resonance imaging (MRI) and proton therapy (PT) using pencil-beam scanning (PBS) may improve image-guided radiotherapy. We aimed at assessing the impact of a magnetic field on PBS-PT plan quality and robustness. Specifically, the robustness against anatomical changes and positioning errors in an MRI-guided scenario with a 30 cm radius 1.5 T magnetic field was studied for prostate PT. Five prostate cancer patients with three consecutive CT images (CT1-3) were considered. Single-field uniform dose PBS-PT plans were generated on the segmented CT1 with Monte-Carlo-based treatment planning software for inverse optimization...
September 20, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28929306/colorectal-anastomotic-leak-delay-in-reintervention-after-false-negative-computed-tomography-scan-is-a-reason-for-concern
#17
C C M Marres, A W H van de Ven, L G J Leijssen, P C M Verbeek, W A Bemelman, C J Buskens
BACKGROUND: Early detection of anastomotic leakage (AL) after colorectal surgery followed by timely reintervention is of crucial importance. The aim of this study was to investigate the accuracy of computed tomography (CT) imaging for AL and the effects of delay in reintervention after a false-negative CT. METHODS: All files from patients who had colorectal surgery with primary anastomoses between 2009 and 2014 were reviewed. The predictive value of CT scanning for AL was determined and correlated with short-term postoperative patient outcomes...
September 19, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28929063/lymph-node-central-necrosis-on-the-computed-tomography-as-the-predictor-of-the-extra-capsular-spread-in-metastatic-head-and-neck-squamous-cell-carcinoma
#18
Aditi Sharma, Ashwin Ashok Jaiswal, Girish Umredkar, Ratiram Barle, Neeta Sharma, Praveer Kumar Banerjee, Amrish Kumar Garg, Ravindranath Membally
The aim of this study is to investigate the relationship between the presence of the cervical lymph node with central necrosis as on the preoperative imaging and postoperative histopathological identification of the lymph node extra capsular spread. This study is a prospective study conducted at J.L.N. Hospital and Research Centre, Bhilai (C.G), from August 2011 to January 2014. Thirty patients with metastatic head and neck squamous cell carcinoma were enrolled. All candidates were subjected to a detailed history taking and clinical examination...
September 2017: Indian Journal of Otolaryngology and Head and Neck Surgery
https://www.readbyqxmd.com/read/28929033/baastrup-s-disease-interspinal-bursitis-and-dorsal-epidural-cysts-radiologic-evaluation-and-impact-on-treatment-options
#19
REVIEW
Jesse Hatgis, Michelle Granville, Robert E Jacobson
Baastrup's disease or "kissing spines syndrome" was first described as a cause of lumbar pain before computerized tomography (CT) and magnetic resonance imaging (MRI) scanning existed. The diagnosis was based on x-ray studies, which showed that the spinous processes, especially in the lower lumbar spine, became approximated to each other and this was a generator of positional back pain. Biomechanically, the interspinous and supraspinous ligaments that are degenerated in Baastrup's disease normally contribute significantly to sagittal alignment...
July 9, 2017: Curēus
https://www.readbyqxmd.com/read/28928818/the-value-of-computer-assisted-navigation-for-bone-reconstruction-after-tumor-resection
#20
Xuejun Peng, Fengping Wang, Jing Su
This study was designed to evaluate the use of computer-assisted navigation with computed tomography (CT) images for bone reconstruction after resection in malignant bone tumor treatment. Forty-five patients with malignant bone tumors were recruited for this study. CT scan images in a computer-assisted navigation system were used to assist during the osteotomy, the pairing with allografts, and the monitoring of the allograft and joint lines to perform joint reconstruction. Our results show that osteotomy and allograft pairing were successful in all patients...
September 2017: Oncology Letters
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