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https://www.readbyqxmd.com/read/29353466/inter-observer-agreement-between-urologists-and-radiologists-in-interpreting-the-computed-tomography-images-of-emergency-patients-with-renal-colic
#1
Jun Young Hong, Dong Hoon Lee, In Ho Chang, Sung Bin Park, Chan Woong Kim, Byung Hoon Chi
PURPOSE: Low-dose non-enhanced computed tomography (LDCT) has been shown to provide low radiation exposure with proper diagnostic accuracy compared to standard dose non-enhanced computed tomography (SDCT) in patients with renal colic. The goal of our study is to estimate the accuracy of LDCT and SDCT interpretation by emergency medicine residents who primarily treated patients with renal colic. MATERIALS AND METHODS: Thirty sample images of both LDCT and SDCT from renal colic patients were extracted from January 2013 to December 2015 in a tertiary teaching hospital...
January 21, 2018: Urology Journal
https://www.readbyqxmd.com/read/29353372/the-variable-position-of-the-inferior-alveolar-nerve-ian-in-the-mandibular-ramus-a-computed-tomography-ct-study
#2
Andrew Y E Yeh, Brian P Finn, Robert H B Jones, Alastair N Goss
INTRODUCTION: This study was designed to quantify the important anatomical landmarks and the path of the inferior alveolar nerve (IAN) within the human mandibular body and ramus, in particular with reference to the bilateral sagittal split osteotomy (BSSO). MATERIALS AND METHODS: Four hundred and eleven CT scans were studied, 299 of these were involved in determining the position of lingula; and 230 were involved in determining the course of IAN in the mandibular molar region, namely from the mesial of the mandibular first molar to the distal of the mandibular second molar; 118 were involved with both measurements...
January 20, 2018: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29353220/quantification-of-spheno-occipital-synchondrosis-fusion-in-a-contemporary-malaysian-population
#3
Salina Hisham, Ambika Flavel, Nurliza Abdullah, Mohamad Helmee Mohamad Noor, Daniel Franklin
Timing of fusion of the spheno-occipital synchondrosis (SOS) is correlated with age. Previous research, however, has demonstrated variation in the timing of closure among different global populations. The present study aims to quantify the timing of SOS fusion in Malaysian individuals as visualised in multi-detector computed tomography (CT) scans and to thereafter formulate age estimation models based on fusion status. Anonymised cranial CT scans of 336 males and 164 females, aged 5-25 years, were acquired from the National Institute of Forensic Medicine, Hospital Kuala Lumpur and Department of Diagnostic Imaging, Hospital Sultanah Aminah...
January 8, 2018: Forensic Science International
https://www.readbyqxmd.com/read/29353104/galactosylated-iodine-based-small-molecule-i-v-ct-contrast-agent-for-bile-duct-imaging
#4
Yeonjin Jung, Hee Sook Hwang, Kun Na
Computed tomography (CT) with contrast plays an important role as a clinical diagnostic tool but still has a limited diagnostic range. In this work, we developed a novel injectable iodine-based small molecule CT contrast agent, even can be used for bile duct diagnostics. The bile duct diagnosable CT contrast agent (BDICA) is synthesized with 5-amino-2,4,6-triiodoisophthaloyl dichloride (ATIPC), tromethamine and lactobionic acid (LBA) for asialoglycoprotein receptor (ASGPR) targeted delivery via receptor-mediated endocytosis and transport to the bile canaliculi...
January 12, 2018: Biomaterials
https://www.readbyqxmd.com/read/29353032/clinical-assessment-and-brain-findings-in-a-cohort-of-mothers-fetuses-and-infants-infected-with-zika-virus
#5
Magdalena Sanz Cortes, Ana Maria Rivera, Mayel Yepez, Carolina V Guimaraes, Israel Diaz Yunes, Alexander Zarutskie, Ivan Davila, Anil Shetty, Arun Mahadev, Saray Maria Serrano, Nicolas Castillo, Wesley Lee, Gregory Valentine, Michael Belfort, Guido Parra, Carrie Mohila, Kjersti Aagaard, Miguel Parra
BACKGROUND: Congenital Zika virus (ZIKV) infection can be detected in both the presence and absence of microcephaly, and manifests as a number of signs and symptoms detected clinically and by neuroimaging. However, to date, qualitative and quantitative measures for the purpose of diagnosis and prognosis are limited. OBJECTIVES: Main objectives of this study conducted on fetuses and infants with confirmed congenital ZIKV infection and detected brain abnormalities are: 1) To assess the prevalence of microcephaly and the frequency of the anomalies including a detailed description based on ultrasound and magnetic resonance imaging (MRI) in fetuses and ultrasound, MRI and computed tomography imaging postnatally; 2) To provide quantitative measures of fetal and infant brain findings by MRI using volumetric analyses and diffusion weighted imaging (DWI); 3) To obtain additional information from placental and fetal histopathological assessments and postnatal clinical evaluations...
January 15, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29352699/computed-tomography-ct-assessment-of-the-membranous-septal-anatomy-prior-to-transcatheter-aortic-valve-replacement-tavr-with-the-balloon-expandable-sapien-3-valve
#6
Brett A Oestreich, Mackenzie Mbai, Sergey Gurevich, Prabhjot S Nijjar, Selcuk Adabag, Stefan Bertog, Rosemary Kelly, Santiago Garcia
OBJECTIVES: The lower limit of the membranous septum (MS) is considered an anatomic landmark for the emergence of the Bundle of His into the left ventricle. Computed tomography (CT) assessment of MS anatomy may provide useful information about the risk of conduction abnormalities following transcatheter aortic valve replacement (TAVR). METHODS AND RESULTS: The study included 102 consecutive patients undergoing TAVR with the Edwards Sapien 3 (S3) valve. Using pre-TAVR CT and post-procedure angiography we evaluated for the presence of calcium in the left ventricular outflow tract (LVOT), calcium depth (CD), implantation depth (ID) and MS length...
December 27, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/29352686/interobserver-and-intraobserver-reliability-of-computed-tomography-based-three-dimensional-preoperative-planning-for-primary-total-knee-arthroplasty
#7
Michiaki Miura, Shigeo Hagiwara, Junichi Nakamura, Yasushi Wako, Yuya Kawarai, Seiji Ohtori
BACKGROUND: Preoperative planning is an important factor for total knee arthroplasty (TKA). The aim of this study is to document the interobserver and intraobserver reliability of computed tomography (CT)-based 3-dimensional (3D) preoperative planning for primary TKA. METHODS: Twenty knees (10 with osteoarthritis and 10 with rheumatoid arthritis) were studied independently by 6 orthopedic surgeons using a CT-based 3D planning system. The measurements were made twice at more than 3-week intervals without any knowledge of their own previous measurements or those of the others...
December 28, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29352568/dual-energy-computed-tomography-should-be-a-first-line-preoperative-localization-imaging-test-for-primary-hyperparathyroidism-patients
#8
Jake Hiebert, Cameron Hague, Shangmei Hou, Sam M Wiseman
BACKGROUND: The objective of this study was to evaluate the performance of dual-energy computed tomography (DECT) for preoperative parathyroid tumor (PT) localization in primary hyperparathyroid (PHP) patients. METHODS: A retrospective review was carried out of the medical records of all PHP patients who underwent ultrasound (US), Tc-99m sestamibi noncontrast single photon emission computed tomography (CT-MIBI), DECT and parathyroidectomy at a single center. RESULTS: The sensitivities and accuracies for preoperative PT localization in the 97 patient study population were: US 40% and 93%, CT-MIBI 64...
January 5, 2018: American Journal of Surgery
https://www.readbyqxmd.com/read/29352382/hibernation-of-masses-suspected-to-be-remnant-tumors-after-surgical-resection-of-retroperitoneal-liposarcoma-is-related-to-improved-overall-survival
#9
Jinsoo Rhu, Kyo Won Lee, Jae Berm Park, Sung Joo Kim
BACKGROUND: Although complete surgical resection is considered the best treatment for retroperitoneal liposarcoma, it is related to a high local recurrence rate. This study analyzed patterns of recurrence of retroperitoneal liposarcoma. METHODS: Records of patients who experienced recurrence after surgery for retroperitoneal liposarcoma from January 2000 to May 2017 were analyzed. Site, number, and characteristics of recurrent mass on computed tomography were serially collected...
January 19, 2018: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29352381/myocardial-perfusion-in-patients-with-suspected-coronary-artery-disease-comparison-between-320-mdct-and-rubidium-82-pet
#10
Roberto Nery Dantas, Antonildes Nascimento Assuncao, Ismar Aguiar Marques, Mateus Guimaraes Fahel, Cesar Higa Nomura, Luiz Francisco Rodrigues Avila, Maria Clementina Pinto Giorgi, Jose Soares, Jose Claudio Meneghetti, Jose Rodrigues Parga
OBJECTIVES: Despite advances in non-invasive myocardial perfusion imaging (MPI) evaluation, computed tomography (CT) multiphase MPI protocols have not yet been compared with the highly accurate rubidium-82 positron emission tomography (82RbPET) MPI. Thus, this study aimed to evaluate agreement between 82RbPET and 320-detector row CT (320-CT) MPI using a multiphase protocol in suspected CAD patients. METHODS: Forty-four patients referred for MPI evaluation were prospectively enrolled and underwent dipyridamole stress 82RbPET and multiphase 320-CT MPI (five consecutive volumetric acquisitions during stress)...
January 19, 2018: European Radiology
https://www.readbyqxmd.com/read/29352380/integrated-prediction-of-lesion-specific-ischaemia-from-quantitative-coronary-ct-angiography-using-machine-learning-a-multicentre-study
#11
Damini Dey, Sara Gaur, Kristian A Ovrehus, Piotr J Slomka, Julian Betancur, Markus Goeller, Michaela M Hell, Heidi Gransar, Daniel S Berman, Stephan Achenbach, Hans Erik Botker, Jesper Moller Jensen, Jens Flensted Lassen, Bjarne Linde Norgaard
OBJECTIVES: We aimed to investigate if lesion-specific ischaemia by invasive fractional flow reserve (FFR) can be predicted by an integrated machine learning (ML) ischaemia risk score from quantitative plaque measures from coronary computed tomography angiography (CTA). METHODS: In a multicentre trial of 254 patients, CTA and invasive coronary angiography were performed, with FFR in 484 vessels. CTA data sets were analysed by semi-automated software to quantify stenosis and non-calcified (NCP), low-density NCP (LD-NCP, < 30 HU), calcified and total plaque volumes, contrast density difference (CDD, maximum difference in luminal attenuation per unit area) and plaque length...
January 19, 2018: European Radiology
https://www.readbyqxmd.com/read/29352372/improving-pet-quantification-of-small-animal-68ga-dota-labeled-pet-ct-studies-by-using-a-ct-based-positron-range-correction
#12
Jacobo Cal-Gonzalez, Juan José Vaquero, Joaquín L Herraiz, Mailyn Pérez-Liva, María Luisa Soto-Montenegro, Santiago Peña-Zalbidea, Manuel Desco, José Manuel Udías
PURPOSE: Image quality of positron emission tomography (PET) tracers that emits high-energy positrons, such as Ga-68, Rb-82, or I-124, is significantly affected by positron range (PR) effects. PR effects are especially important in small animal PET studies, since they can limit spatial resolution and quantitative accuracy of the images. Since generators accessibility has made Ga-68 tracers wide available, the aim of this study is to show how the quantitative results of [68Ga]DOTA-labeled PET/X-ray computed tomography (CT) imaging of neuroendocrine tumors in mice can be improved using positron range correction (PRC)...
January 19, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29352333/long-term-results-of-custom-cementless-stem-total-hip-arthroplasty-performed-in-hip-fusion
#13
Xavier Flecher, Matthieu Ollivier, Pascal Maman, Sébastien Pesenti, Sébastien Parratte, Jean-Noël Argenson
INTRODUCTION: Due to complex anatomical considerations, results of cementless-stem total hip arthroplasty (THA) in hip fusion remain controversial compared with conventional THA. We therefore aimed to analyse 3D anatomy of the fused hip based on pre-operative computed tomography (CT) scans, functional outcomes based on the Harris Hip Score (HHS) and the Hip Disability and Osteoarthritis Outcome Score (HOOS), modifications of hip anatomy based on post-operative standardised radiography, and determine complication rate and long-term survival based on Kaplan-Meier analysis...
January 19, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29352062/critical-role-of-angiographic-acquisition-modality-and-reconstruction-on-morphometric-and-haemodynamic-analysis-of-intracranial-aneurysms
#14
Alexandra Lauric, James E Hippelheuser, Adel M Malek
BACKGROUND: Subtracted 3-D rotational angiography (3DRA) and cone-beam computed tomography angiography (CBCT-A) are often used in assessing cerebral aneurysm shape and haemodynamic profile. We sought to evaluate the effect of imaging modality, reconstruction parameters, and kernel selection on patient-derived aneurysm morphology and computational fluid dynamic (CFD) analysis to assess its potential contribution to inter-study variability. METHODS: Four patients (five aneurysms) underwent concurrent 3DRA followed by high-resolution CBCT-A...
January 19, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29351787/scl20a2-mutation-presenting-with-acute-ischemic-stroke-a-case-report
#15
Xiaoyu Zhang, Gaoting Ma, Zhangning Zhao, Meijia Zhu
BACKGROUND: Primary familial brain calcification (PFBC) is a rare disorder characterized by distinctive bilateral brain calcification and variable clinical presentations. However, cerebrovascular attack was rarely reported in PFBC patients. We here reported a SLC20A2 mutation patient presenting with acute ischemic stroke. CASE PRESENTATION: A 56 years old man was transferred to our hospital because of 6 days of melena and 3 days of somnolence, agitation and mood changes...
January 19, 2018: BMC Neurology
https://www.readbyqxmd.com/read/29351696/risk-of-primary-spontaneous-pneumothorax-according-to-chest-configuration
#16
Chul Hwan Park, MinDong Sung, Geun Dong Lee, Young Woo Do, Hee Min Park, Junu Kim, Jin Hur, Kyunghwa Han, Tae Hoon Kim, Jason Jungsik Song, Sungsoo Lee
BACKGROUND:  We compared the chest configurations of patients with primary spontaneous pneumothorax (PSP) and age-sex-matched controls to determine the presence of chest wall deformities in patients with PSP. METHODS:  We retrospectively enrolled 166 male patients with PSP (age, 18-19 years) and 85 age-sex-matched controls without PSP, who simultaneously underwent chest computed tomography (CT) and radiography at one of two institutes. After correcting for height, the following thoracic parameters were comparatively evaluated between the two groups: maximal internal transverse (T) and anteroposterior (W) diameters of the chest, maximal internal lung height (H), Haller index (T/W), and T/Height, T/H, W/Height, W/H, and H/Height ratios...
January 19, 2018: Thoracic and Cardiovascular Surgeon
https://www.readbyqxmd.com/read/29351655/establishing-diagnostic-reference-levels-for-cardiac-computed-tomography-angiography-in-saudi-arabia
#17
Ali B Alhailiy, Peter L Kench, Mark F McEntee, Patrick C Brennan, Elaine A Ryan
Cardiac computed tomography angiography (CCTA) is a commonly used diagnostic imaging tool for cardiovascular disease. Despite constant improvements to imaging technologies, the radiation dose to patients remains a concern when using this procedure. Diagnostic reference levels (DRLs) are used as a trigger to identify and alert individual facilities that are using high doses during CT. This study aims to assess patient radiation dose and establish new national DRLs (NDRL) associated with CCTA in Saudi clinical practices...
January 17, 2018: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29351615/18f-fluorodeoxyglucose-positron-emission-computed-tomography-and-computed-tomography-angiography-in-prosthetic-heart-valve-endocarditis-from-guidelines-to-clinical-practice
#18
Laurens E Swart, Asbjørn M Scholtens, Wilco Tanis, Koen Nieman, Ad J J C Bogers, Fred J Verzijlbergen, Gabriel P Krestin, Jolien W Roos-Hesselink, Ricardo P J Budde
The timely diagnosis of prosthetic heart valve endocarditis remains challenging yet of utmost importance. 18F-fluorodeoxyglucose (18 F-FDG) positron emission/computed tomography (PET/CT) and cardiac computed tomography angiography (CTA) were recently introduced as additional diagnostic tools in the most recent ESC guidelines on infective endocarditis. However, how to interpret PET/CT findings with regard to what is to be considered abnormal, what the potential confounders may be, as well as which patients benefit most from these additional imaging techniques and how to best perform them in these often-complex patients, remains unclear...
January 16, 2018: European Heart Journal
https://www.readbyqxmd.com/read/29351567/whole-thorax-irradiation-of-non-human-primates-induces-persistent-nuclear-damage-and-gene-expression-changes-in-peripheral-blood-cells
#19
Shanaz A Ghandhi, Helen C Turner, Igor Shuryak, Gregory O Dugan, J Daniel Bourland, John D Olson, Janet A Tooze, Shad R Morton, Ines Batinic-Haberle, J Mark Cline, Sally A Amundson
We investigated the cytogenetic and gene expression responses of peripheral blood cells of non-human primates (NHP, Macaca mulatta) that were whole-thorax irradiated with a single dose of 10 Gy. In this model, partial irradiation of NHPs in the thoracic region (Whole Thorax Lung Irradiation, WTLI) allows the study of late radiation-induced lung injury, while avoiding acute radiation syndromes related to hematopoietic and gastrointestinal injury. A transient drop in circulating lymphocytes and platelets was seen by 9 days, followed by elevations in respiratory rate, circulating neutrophils, lymphocytes, and monocytes at 60-100 days, corresponding to computed tomography (CT) and histologic evidence of pneumonitis, and elective euthanasia of four animals...
2018: PloS One
https://www.readbyqxmd.com/read/29351494/factors-associated-with-sarcopenia-in-patients-with-colorectal-cancer
#20
Bianca Umbelino de Souza, Nilian Carla Silva Souza, Renata Brum Martucci, Viviane Dias Rodrigues, Nivaldo Barroso de Pinho, Maria Cristina Gonzalez, Carla Maria Avesani
Introduction; Sarcopenia are frequently observed in cancer patients and was associated with poor prognosis. Objectives; to determine the association of nutritional status, body composition, and clinic parameters with sarcopenia in patients with colorectal cancer (CRC). Methods; We conducted a cross-sectional study of 197 patients with CRC. The sarcopenia elements, including lumbar skeletal muscle index (SMI), handgrip strength, and gait speed were measured. The SMI was assessed by computed tomography at third lumbar vertebra...
January 19, 2018: Nutrition and Cancer
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