keyword
MENU ▼
Read by QxMD icon Read
search

CT scan imaging

keyword
https://www.readbyqxmd.com/read/27926812/the-role-of-18f-fluorodeoxyglucose-positron-emission-tomography-in-the-assessment-of-disease-activity-of-adult-onset-still-s-disease
#1
Young-Sil An, Chang-Hee Suh, Ju-Yang Jung, Hundo Cho, Hyoun-Ah Kim
Background/Aims: 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) has been suggested as a reliable imaging technique for monitoring of disease activity in patients with adult-onset Still's disease (AOSD). Therefore, we investigated the clinical significance of 18F-FDG PET/CT in Korean AOSD patients. Methods: Thirteen AOSD patients were included in the study. The PET/CT images were evaluated with visual and semiquantitative method using standardized uptake values (SUVs)...
December 7, 2016: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/27926682/clinical-outcomes-of-nonunions-of-hindfoot-and-ankle-fusions
#2
Fabian Krause, Alastair S E Younger, Judith F Baumhauer, Timothy R Daniels, Mark Glazebrook, Peter T Evangelista, Michael S Pinzur, Gowreeson Thevendran, Rafe M J Donahue, Christopher W DiGiovanni
BACKGROUND: While nonunion after foot and ankle fusion surgery has been associated with poor outcomes, we are not aware of any longitudinal study on this subject. Thus, we prospectively evaluated the impact of nonunion on clinical outcomes of foot and ankle fusions and identified potential risk factors for nonunion after these procedures. METHODS: Using data from a randomized clinical trial on recombinant human platelet-derived growth factor-BB (rhPDGF-BB; Augment Bone Graft, BioMimetic Therapeutics), union was defined either by assessment of computed tomography (CT) scans at 24 weeks by a reviewer blinded to the type of treatment or by the surgeon's composite assessment of clinical and radiographic findings at 52 weeks and CT findings at 24 or 36 weeks...
December 7, 2016: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/27925781/same-day-computed-tomographic-chest-imaging-for-pulmonary-nodule-targeting-with-electromagnetic-navigation-bronchoscopy-may-decrease-unnecessary-procedures
#3
Roy W Semaan, Hans J Lee, David Feller-Kopman, Andrew D Lerner, Christopher M Mallow, Jeffrey Thiboutot, Sixto A Arias, Lonny B Yarmus
RATIONALE: Bronchoscopy is commonly used for the diagnosis of suspicious pulmonary nodules discovered on computed tomographic (CT) imaging of the chest. Procedural CT imaging for bronchoscopy planning is often completed weeks to months before the date of a scheduled bronchoscopy, which may not allow discovery of a decrease in nodule size or resolution before the bronchoscopic procedure. OBJECTIVES: To determine whether same-day CT imaging of the chest discovers partial or total resolution of some lung nodules and thereby reduces unnecessary bronchoscopic procedures...
December 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27925466/a-prospective-evaluation-of-contrast-and-radiation-dose-and-image-quality-in-cardiac-ct-in-children-with-complex-congenital-heart-disease-using-low-concentration-iodinated-contrast-agent-and-low-tube-voltage-and-current
#4
Qiao-Ru Hou, Wei Gao, Yu Min Zhong, Ai Min Sun, Qian Wang, Hai Sheng Qiu, Fang Wang, Jian Ying Li, Liwei Hu
OBJECTIVE: To assess image quality, contrast dose and radiation dose in cardiac CT in children with congenital heart disease using low-concentration iodinated contrast agent and low tube voltage and current in comparison with standard-dose protocol. METHODS: 110 patients with congenital heart disease were randomized to one of the two scan protocols: Group A (n=45) with 120mA tube current and contrast agent of 270mgI/ml in concentration (Visipaque, GE Healthcare), and Group B (n=65) with the conventional 160mA and 370mgI/mL concentration contrast (Iopamiro, Bracco)...
December 7, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27925304/dura-mater-graft-associated-creutzfeldt-jakob-disease-with-30-year-incubation-period
#5
Masahiro Shijo, Hiroyuki Honda, Sachiko Koyama, Koji Ishitsuka, Koichiro Maeda, Junya Kuroda, Mitsugu Tanii, Takanari Kitazono, Toru Iwaki
Over 60% of all patients with dura mater graft-associated Creutzfeldt-Jakob disease (dCJD) have been diagnosed in Japan. The incubation period has ranged from 1 to 30 years and the age at onset from 15 to 80 years. Here, we report a 77-year-old male Japanese autopsied dCJD case with the longest incubation period so far in Japan. He received a cadaveric dural graft at the right cranial convexity following a craniotomy for meningioma at the age of 46. At 30 years post-dural graft placement, disorientation was observed as an initial symptom of dCJD...
December 7, 2016: Neuropathology: Official Journal of the Japanese Society of Neuropathology
https://www.readbyqxmd.com/read/27923707/three-dimensional-magnetic-resonance-imaging-quantification-of-glenoid-bone-loss-is-equivalent-to-3-dimensional-computed-tomography-quantification-cadaveric-study
#6
Adam B Yanke, Jason J Shin, Ian Pearson, Bernard R Bach, Anthony A Romeo, Brian J Cole, Nikhil N Verma
PURPOSE: To assess the ability of 3-dimensional (3D) magnetic resonance imaging (MRI, 1.5 and 3 tesla [T]) to quantify glenoid bone loss in a cadaveric model compared with the current gold standard, 3D computed tomography (CT). METHODS: Six cadaveric shoulders were used to create a bone loss model, leaving the surrounding soft tissues intact. The anteroposterior (AP) dimension of the glenoid was measured at the glenoid equator and after soft tissue layer closure the specimen underwent scanning (CT, 1...
December 3, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/27922831/comprehensive-monte-carlo-study-of-patient-doses-from-cone-beam-ct-imaging-in-radiotherapy
#7
T E Marchant, K D Joshi
Accurate knowledge of ionizing radiation dose from cone-beam CT (CBCT) imaging in radiotherapy is important to allow concomitant risks to be estimated and for justification of imaging exposures. This study uses a Monte Carlo CBCT model to calculate imaging dose for a wide range of imaging protocols for male and female patients. The Elekta XVI CBCT system was modeled using GATE and simulated doses were validated against measurements in a water tank and thorax phantom. Imaging dose was simulated in the male and female ICRP voxel phantoms for a variety of anatomical sites and imager settings (different collimators, filters, full and partial rotation)...
December 6, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/27921286/-18-f-fdg-pet-ct-to-differentiate-malignant-necrotic-lymph-node-from-benign-cystic-lesions-in-the-neck
#8
Peymaneh Abadi, Allan Johansen, Christian Godballe, Oke Gerke, Poul Flemming Høilund-Carlsen, Anders Thomassen
OBJECTIVE: Patients presenting with cystic lesions in the neck without obvious signs of malignancy constitute a diagnostic challenge since fine needle aspiration is often insufficient and a diagnosis may not be reached until surgical resection/biopsy is performed. The differential diagnosis of a cystic cervical mass comprises a variety of benign conditions, but malignancy must be ruled out. We examined the diagnostic performance of fluorine-18 fluorodeoxyglucose ((18)F-FDG) PET/CT to identify malignancy...
December 5, 2016: Annals of Nuclear Medicine
https://www.readbyqxmd.com/read/27921171/computed-tomography-and-magnetic-resonance-fusion-imaging-in-cholesteatoma-preoperative-assessment
#9
Agustín Campos, Federico Mata, Rosa Reboll, María Luisa Peris, Jorge Basterra
The purpose of this study is to describe a method for developing fusion imaging for the preoperative evaluation of cholesteatoma. In 33 patients diagnosed with cholesteatoma, a high-resolution temporal bone computed tomography (CT) scan without intravenous contrast and propeller diffusion-weighted magnetic resonance imaging (MRI) were performed. Both studies were then sent to the BrainLAB work station, where the images were fused to obtain a morphological and color map. Intraoperative findings coincided with fusion CT-MRI imaging in all but two patients...
December 5, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27921075/longitudinal-monitoring-of-reconstructed-activity-concentration-on-a-clinical-time-of-flight-pet-ct-scanner
#10
Lawrence R MacDonald, Amy E Perkins, Chi-Hua Tung
Positron emission tomography (PET) images are potential quantitative biomarkers. Understanding long-term (months/years) biomarker variability is important for establishing confidence intervals on studies using such biomarkers over these time frames. PET biomarkers are derived from activity concentration ([Formula: see text]) extracted from PET images. Over 30 months, we measured the stability of decay-normalized counts ([Formula: see text]) and [Formula: see text] by scanning the same 4.5-cm-diameter Ge-68 cylinder weekly, the same Na-22 point source daily, and a refilled 20-cm F-18 cylinder phantom monthly on a clinical TOF-PET/CT scanner...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/27921070/accuracy-of-patient-specific-organ-dose-estimates-obtained-using-an-automated-image-segmentation-algorithm
#11
Taly Gilat Schmidt, Adam S Wang, Thomas Coradi, Benjamin Haas, Josh Star-Lack
The overall goal of this work is to develop a rapid, accurate, and automated software tool to estimate patient-specific organ doses from computed tomography (CT) scans using simulations to generate dose maps combined with automated segmentation algorithms. This work quantified the accuracy of organ dose estimates obtained by an automated segmentation algorithm. We hypothesized that the autosegmentation algorithm is sufficiently accurate to provide organ dose estimates, since small errors delineating organ boundaries will have minimal effect when computing mean organ dose...
October 2016: Journal of Medical Imaging
https://www.readbyqxmd.com/read/27920846/three-dimensional-computed-tomography-rendering-of-pedunculated-colon-polyp-new-clapper-bell-sign-pedunculated-polyp-at-3d-computed-tomography
#12
Marco Di Serafino, Rosa Severino, Fabia Laviani, Domenico Maroscia
The incidental detection of a tubulovillous adenoma at a contrast-enhanced computed tomography (CECT) with nondedicated protocol, performed in emergency conditions, is an uncommon finding. We report a case of a woman presenting with a subocclusive episode. A CECT scan was performed, and a pedunculated polyp could be appreciated at 3D-reconstruction images. A particular depiction of pedunculus of the polypoid lesion, resemble a clapper-bell, could help to define the vegetating lesion at the volume-rendering reconstruction images...
December 2016: Radiology case reports
https://www.readbyqxmd.com/read/27920842/utility-of-electrocardiography-ecg-gated-computed-tomography-ct-for-preoperative-evaluations-of-thymic-epithelial-tumors
#13
Yoshiyuki Ozawa, Masaki Hara, Motoo Nakagawa, Yuta Shibamoto
BACKGROUND: Preoperative evaluation of invasion to the adjacent organs is important for the thymic epithelial tumors on CT. The purpose of our study was to evaluate the utility of electrocardiography (ECG)-gated CT for assessing thymic epithelial tumors with regard to the motion artifacts produced and the preoperative diagnostic accuracy of the technique. MATERIAL/METHODS: Forty thymic epithelial tumors (36 thymomas and 4 thymic carcinomas) were examined with ECG-gated contrast-enhanced CT using a dual source scanner...
2016: Polish Journal of Radiology
https://www.readbyqxmd.com/read/27920811/the-use-of-routine-non-density-calibrated-clinical-computed-tomography-data-as-a-potentially-useful-screening-tool-for-identifying-patients-with-osteoporosis
#14
Christopher John Burke, Manjiri M Didolkar, Huiman X Barnhart, Emily N Vinson
OBJECTIVES: To evaluate whether lumbar vertebral body density CT attenuation values measured in Hounsfield Units (HUs) on routine Computed Tomography (CT) examinations can be reliably measured with limited variability, and to evaluate for a correlation between HUs and bone mineral density as measured by dual energy X-ray absorptiometry (DXA) scan. METHODS: Retrospective review of a total of 249 routine MDCT examinations, performed to measure HUs at the first non-rib bearing lumbar vertebral body on axial images, cross-referenced to the lateral scout image...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27919850/detection-and-differentiation-of-early-hepatocellular-carcinoma-from-cirrhosis-using-ct-perfusion-in-a-rat-liver-model
#15
Jin-Ping Li, Guang-Long Feng, Da-Qing Li, Hai-Bo Wang, De-Li Zhao, Yong Wan, Hui-Jie Jiang
BACKGROUND: Functional imaging such as CT perfusion can detect morphological and hemodynamic changes in hepatocellular carcinoma (HCC). Pre-carcinoma and early HCC nodules are difficult to differentiate by observing only their hemodynamics changes. The present study aimed to investigate hemodynamic parameters and evaluate their differential diagnostic cut-off between pre-carcinoma and early HCC nodules using CT perfusion and receiver operating characteristic (ROC) curves. METHODS: Male Wistar rats were randomly divided into control (n=20) and experimental (n=70) groups...
December 2016: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/27919270/delayed-hyperbaric-oxygen-therapy-for-air-emboli-after-open-heart-surgery-case-report-and-review-of-a-success-story
#16
Eva Niyibizi, Guillaume Elyes Kembi, Claude Lae, Rodrigue Pignel, Tornike Sologashvili
BACKGROUND: The current case describes a rare diagnosis of iatrogenic air emboli after elective cardiopulmonary bypass that was successfully treated with delayed hyperbaric oxygen therapy, with good clinical evolution in spite of rare complications. CASE PRESENTATION: A 35 years old male was admitted to the intensive care unit (ICU) for post-operative management after being placed on cardiopulmonary bypass (CPB) for an elective ventricular septal defect closure and aortic valvuloplasty...
December 5, 2016: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/27918363/tip-fold-over-in-cochlear-implantation-case-series
#17
M Geraldine Zuniga, Alejandro Rivas, Andrea Hedley-Williams, Rene H Gifford, Robert Dwyer, Benoit M Dawant, Linsey W Sunderhaus, Kristen L Hovis, George B Wanna, Jack H Noble, Robert F Labadie
OBJECTIVE: To describe the incidence, clinical presentation, and performance of cochlear implant (CI) recipients with tip fold-over. STUDY DESIGN: Retrospective case series. SETTING: Tertiary referral center. PATIENTS: CI recipients who underwent postoperative computed tomography (CT) scanning. INTERVENTION(S): Tip fold-over was identified tomographically using previously validated software that identifies the electrode array...
December 1, 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27918152/computed-tomographic-characteristics-of-the-thyroid-glands-in-eight-hyperthyroid-cats-pre-and-postmethimazole-treatment-compared-with-seven-euthyroid-cats
#18
Jennifer L Bush, Sarah Nemanic, Jana Gordon, Gerd Bobe
Hyperthyroidism is the most common feline endocrinopathy; thyroid computed tomography (CT) may improve disease detection and methimazole dose selection. Objectives of this experimental pre-post with historical case-control study were to perform thyroid CT imaging in awake or mildly sedated hyperthyroid cats, compare thyroid gland CT appearance in euthyroid and hyperthyroid cats pre- and postmethimazole treatment, and determine whether thyroid size or attenuation correlate with methimazole dose needed for euthyroidism...
December 5, 2016: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/27914956/individual-refinement-of-attenuation-correction-maps-for-hybrid-pet-mr-based-on-multi-resolution-regional-learning
#19
Kuangyu Shi, Sebastian Fürst, Liang Sun, Mathias Lukas, Nassir Navab, Stefan Förster, Sibylle I Ziegler
PET/MR is an emerging hybrid imaging modality. However, attenuation correction (AC) remains challenging for hybrid PET/MR in generating accurate PET images. Segmentation-based methods on special MR sequences are most widely recommended by vendors. However, their accuracy is usually not high. Individual refinement of available certified attenuation maps may be helpful for further clinical applications. In this study, we proposed a multi-resolution regional learning (MRRL) scheme to utilize the internal consistency of the patient data...
November 19, 2016: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/27914838/lacrimal-gland-involvement-in-blepharophimosis-ptosis-epicanthus-inversus-syndrome
#20
Ana Filipa Duarte, Patricia M S Akaishi, Greice A de Molfetta, Salomão Chodraui-Filho, Murilo Cintra, Alcina Toscano, Wilson Araujo Silva, Antonio A V Cruz
PURPOSE: To describe the involvement of the lacrimal gland (LG) in blepharophimosis-ptosis-epicanthus inversus syndrome (BPES). DESIGN: Observational, cross-sectional study. PARTICIPANTS: Twenty-one patients with BPES (10 female, 11 male) aged on average 15 years (range, 2-39 years), from 3 Brazilian medical centers and 1 Portuguese medical center. METHODS: Patients had their ocular surface evaluated with slit-lamp biomicroscopy, and tear production quantified with the Schirmer test I...
November 30, 2016: Ophthalmology
keyword
keyword
56232
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"