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https://www.readbyqxmd.com/read/29142489/correlation-between-osteoprotegerin-serum-level-and-coronary-calcification-using-coronary-artery-calcium-score-in-patient-with-moderate-severe-cardiovascular-risk-factor
#1
J Nugroho, Widorini Widorini
Coronary artery calcification is a part of atherosclerosis process associated with coronary heart disease. Recently, coronary artery calcification assessment using computed tomography (CT) is still the best noninvasive imaging with high sensitivity and specificity. Osteoprotegerin (OPG) is one of vascular calcification marker that through its role to bind receptor activator of nuclear factor-κβ ligand and inhibit osteoclastogenesis is suspected of playing a role for coronary calcification in atherosclerosis process...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29131280/the-sphenopalatine-foramen-in-man-anatomical-radiological-and-endoscopic-study
#2
Ehab Abdel Aziz El-Shaarawy, Sherif S Hassan
BACKGROUND: Epistaxis is a frequent problem otorhinolaryngologists faces of in their practice. The variations of the sphenopalatine foramen and consequently the artery may be one of the major sources of such bleeding. AIM OF THE WORK: The present work aimed at to localize the site of sphenopalatine foramen and also to illustrate its different shapes, number and any other variation. MATERIALS AND METHODS: In the current study, twenty adult skulls of both sexes with total 40 half skulls were used in addition to 20 heads of adult living subjects of both sexes aged between 30-60 years examined with multislice helical CT with 3-D reconstruction of SPF...
November 13, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29093777/coccygeal-morphology-on-multislice-computed-tomography-in-a-tertiary-hospital-in-india
#3
Venkatraman Indiran, Vadivalagianambi Sivakumar, Prabakaran Maduraimuthu
Study Design: A retrospective, cross-sectional study of 213 patients who presented for abdominal computed tomography (CT) scans to assess coccygeal morphology in the Indian population. Purpose: There have been relatively few studies of coccygeal morphology in the normal population and none in the Indian population. We aimed to estimate coccygeal morphometric parameters in the Indian population. Overview of Literature: Coccygeal morphology has been studied in European, American, Korean, and Egyptian populations, with few differences in morphology among populations...
October 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29079357/classification-of-the-level-of-mandibular-atrophy-a-computer-assisted-study-based-on-500-ct-scans
#4
Viktoria Varga, Stefan Raith, Christina Loberg, Ali Modabber, Alexander K Bartella, Frank Hölzle, Horst Fischer, Timm Steiner
OBJECTIVE: For the optimal treatment of patients with highly atrophic mandibles, it is required to assess and quantify the extent of atrophy. The classification schemes that are well established today are known to be limited with respect to objectivity and reproducibility. Thus, the aim of the study was to generate a computer-aided method of classification, investigate its applicability in comparison with the established methods, and apply it to a large set of data. MATERIALS AND METHODS: Mandibular geometries were segmented from 500 Multislice (MSCT) datasets of atrophic and non-atrophic mandibles and automatically processed to gain virtual images of the mandibular cross-sections...
September 22, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29067491/impact-of-malondialdehyde-modified-low-density-lipoprotein-on-coronary-plaque-vulnerability-in-patients-not-receiving-lipid-lowering-therapy-a-whole-coronary-analysis-with-multislice-computed-tomography
#5
Tsuyoshi Ito, Taku Ichihashi, Hiroshi Fujita, Tomonori Sugiura, Nobuyuki Ohte
Vulnerable plaque disruption was suggested as a primary cause of acute coronary syndrome. This study investigated the impact of malondialdehyde-modified low-density lipoprotein (MDA-LDL) on whole coronary plaque vulnerability, based on multislice-computed tomography (MSCT). We included 197 patients that were not receiving lipid-lowering therapy. We retrospectively analyzed MSCT and MDA-LDL measurements. We defined a CT-derived vulnerable plaque as a plaque with a remodeling index > 1.10 and a mean CT density value < 30 HU...
October 24, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29037610/coronary-intramural-hematoma-visualized-on-multislice-ct-angiography
#6
Marcelo Trivi, Agustina Sciancalepore, Lucrecia Burgos
No abstract text is available yet for this article.
October 13, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/29036977/-safety-and-feasibility-of-sheathless-transfemoral-aortic-valve-implantation
#7
H J Pei, S Y Teng, T Luo, Y J Wu, Y J Yang, S B Qiao, B Xu, R L Gao
Objective: To investigate the safety and feasibility of sheathless transfemoral aortic valve replacement (TAVR). Methods: In this prospective study, we enrolled 23 patients with severe aortic stenosis (AS) who were inoperable or at high-risk for surgical aortic valve replacement operation in Fuwai hospital From September 2012 to June 2015. Multislice spiral CT and angiography of femoral artery showed that all patients had minimal femoral artery diameters (<6.5 mm) and severe calcification which was not suitable for transfemoral TAVR through sheath...
September 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/29033293/ct-and-mri-slice-separation-evaluation-by-labview-developed-software
#8
Giuseppe Acri, Barbara Testagrossa, Angela Sestito, Lilla Bonanno, Giuseppe Vermiglio
The efficient use of Computed Tomography (CT) and Magnetic Resonance Imaging (MRI) equipment necessitates establishing adequate quality-control (QC) procedures. In particular, the accuracy of slice separation, during multislices acquisition, requires scan exploration of phantoms containing test objects. To simplify such procedures, a novel phantom and a computerised LabView-based procedure have been devised, enabling determination the midpoint of full width at half maximum (FWHM) in real time while the distance from the profile midpoint of two progressive images is evaluated and measured...
October 13, 2017: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/29027240/low-dose-ct-reconstruction-using-spatially-encoded-nonlocal-penalty
#9
Kyungsang Kim, Georges El Fakhri, Quanzheng Li
PURPOSE: Computed tomography (CT) is one of the most used imaging modalities for imaging both symptomatic and asymptomatic patients. However, because of the high demand for lower radiation dose during CT scans, the reconstructed image can suffer from noise and artifacts due to the trade-off between the image quality and the radiation dose. The purpose of this paper is to improve the image quality of quarter dose images and to select the best hyperparameters using the regular dose image as ground truth...
October 2017: Medical Physics
https://www.readbyqxmd.com/read/29023143/changes-of-emphysema-parameters-over-the-respiratory-cycle-during-free-breathing-preliminary-results-using-respiratory-gated-4d-ct
#10
Julia Ley-Zaporozhan, Sebastian Ley, Jürgen Mews, Oliver Weinheimer, Sonja Kandel, Patrik Rogalla
The purpose of this research was to evaluate respiratory gated CT of the lung in patients with COPD for analysis of parenchymal characteristics who were potential candidates for volume reduction surgery. Eleven patients with clinically known emphysematous disease underwent a respiratory gated, free-breathing 64-multislice-CT (Aquilion 64, Toshiba). Retrospective image reconstruction was performed similar to cardiac CT at every 10% of the respiratory loop, resulting in 10 complete volumetric datasets at 10 equidistant time points...
October 12, 2017: COPD
https://www.readbyqxmd.com/read/28983492/comparison-of-the-ctdi-and-aapm-report-no-111-methodology-in-adult-adolescent-and-child-head-phantoms-for-msct-and-dental-cbct-scanners
#11
Celina L Li, Yogesh Thakur, Nancy L Ford
This study investigates the dosimetry methodology proposed by the American Association of Physicists in Medicine (AAPM) task group 111 and compares with the computed tomography dose index (CTDI) method and the SEDENTEXCT DI method on one clinical multislice CT and two dental cone beam CT (CBCT) scanners using adult, adolescent, and child head phantoms. Following the AAPM method, the normalized (100 mAs) equilibrium doses ([Formula: see text]) for Toshiba Aquilion One MSCT computed using dose measurements from the central hole of the phantom ([Formula: see text]), the peripheral hole of the phantom, ([Formula: see text]), and by the [Formula: see text] equation ([Formula: see text]) are in the range from 20 to 25 mGy...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28942233/comparison-of-radiation-doses-imparted-during-128-256-384-multislice-ct-scanners-and-cone-beam-computed-tomography-for-intra-and-perioperative-cochlear-implant-assessment
#12
N Guberina, U Dietrich, D Arweiler-Harbeck, M Forsting, A Ringelstein
PURPOSE: To examine radiation-doses imparted during multislice (MSCT) and cone-beam computed-tomography (CBCT) for perioperative examination of cochlear-implant insertion. METHODS: Radiation-doses were assessed during standardized petrous-bone CT-protocols at different MSCT ((I) single-source CT-scanner Somatom-Definition-AS+, (II) 2nd generation of dual-source CT-scanner Somatom-Definition-Flash, (III) 3rd generation of dual-source CT-scanner Somatom-Force and at the CBCT Ziehm-Vision-RFD3D ((IV) (a) RFD-3D (Standard-modifier), (b) RFD-3D (Low-dose-modifier))...
September 19, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28936605/sex-determination-of-a-tunisian-population-by-ct-scan-analysis-of-the-skull
#13
Malek Zaafrane, Mehdi Ben Khelil, Ines Naccache, Ekbel Ezzedine, Frédéric Savall, Norbert Telmon, Najla Mnif, Moncef Hamdoun
It is widely accepted that the estimation of biological attributes in the human skeleton is more accurate when population-specific standards are applied. With the shortage of such data for contemporary North African populations, it is duly required to establish population-specific standards. We present here the first craniometric standards for sex determination of a contemporary Tunisian population. The aim of this study was to analyze the correlation between sex and metric parameters of the skull in this population using CT scan analysis and to generate proper reliable standards for sex determination of a complete or fragmented skull...
September 21, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28932562/standardized-uptake-value-and-radiological-density-attenuation-as-predictive-and-prognostic-factors-in-patients-with-solitary-pulmonary-nodules-our-experience-on-1-592-patients
#14
Duilio Divisi, Mirko Barone, Luca Bertolaccini, Gaetano Rocco, Piergiorgio Solli, Roberto Crisci
BACKGROUND: Multislice computed tomography (MSCT) increased detection of solitary pulmonary nodules (SPNs), changing the management based on radiological and clinical factors. When 18-fluorine fluorodeoxyglucose positron emission tomography combined with computed tomography ((18)F-FDG-PET/CT) was considered for the evaluation of nodules, the maximum standardized uptake value (SUVmax) more than 2.5 is used frequently as a cut off for malignancy. The purpose of this study is to evaluate SUVmax PET/CT and pulmonary attenuation patterns at MSCT in patients with SPN according to morphological and pathological characteristics of the lesion...
August 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28834965/response-evaluation-of-malignant-liver-lesions-after-tace-sirt-comparison-of-manual-and-semi-automatic-measurement-of-different-response-criteria-in-multislice-ct
#15
COMPARATIVE STUDY
Anna Janina Höink, Christoph Schülke, Raphael Koch, Annika Löhnert, Sara Kammerer, Rasmus Fortkamp, Walter Heindel, Boris Buerke
Purpose To compare measurement precision and interobserver variability in the evaluation of hepatocellular carcinoma (HCC) and liver metastases in MSCT before and after transarterial local ablative therapies. Materials and Methods Retrospective study of 72 patients with malignant liver lesions (42 metastases; 30 HCCs) before and after therapy (43 SIRT procedures; 29 TACE procedures). Established (LAD; SAD; WHO) and vitality-based parameters (mRECIST; mLAD; mSAD; EASL) were assessed manually and semi-automatically by two readers...
November 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28833419/multislice-spiral-ct-angiography-for-evaluation-of-acute-aortic-syndrome
#16
De-Li Zhao, Xin-Ding Liu, Cheng-Lei Zhao, Hai-Ting Zhou, Guo-Kun Wang, Hong-Wei Liang, Jin-Ling Zhang
OBJECTIVE: To discuss the diagnostic value of multislice CT angiography (MSCTA) in acute aortic syndrome (AAS). MATERIALS AND METHODS: The clinical and imaging data of 36 cases diagnosed as AAS by MSCTA were collected. The manifestations of the MSCTA images were reviewed retrospectively, and the average x-ray dose was calculated. RESULTS: Among 36 AAS cases, 16 cases had aortic dissection (AD), 8 cases had penetrating atherosclerotic ulcer (PAU), 7 cases had intramural hematoma (IMH), and 5 cases had unstable thoracic aneurysm (UTA)...
August 22, 2017: Echocardiography
https://www.readbyqxmd.com/read/28791822/a-coronary-proatherosclerotic-marker-pregnancy-associated-plasma-protein-a-and-its-association-with-coronary-calcium-score-and-carotid-intima-media-thickness
#17
Abdullah Guven, Bora Demircelik, Ozgul Malcok Gurel, Okan Er, Halil Ibrahim Aydin, Alper Bozkurt
BACKGROUND: Atherosclerosis, a chronic inflammatory disorder of the arteries, is responsible for the greatest number of deaths in westernized societies, with numbers increasing at a marked rate in developing countries. Coronary calcium score (CCS), carotid intima-media thickness (CIMT) and pregnancy-associated plasma protein A (PAPP-A) are predictors for the development of atherosclerosis. OBJECTIVES: This study was aimed to investigate the relationship between CCS, CIMT and PAPP-A for earlier diagnosis of atherosclerosis...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28765021/reevaluation-of-classic-posterior-ventricular-puncture-sites-using-a-3-dimensional-brain-simulation-model
#18
Keyvan Tayebi Meybodi, Ehsan Hoseinzadeh, Mostafa Ahmadi, Mohammad Taghvaei, Hooshang Saberi
OBJECTIVE: To revalidate the craniometric dimensions of classic posterior burr holes for ventricular catheter insertion in hydrocephalic patients, based on ideal catheter position on a 3-dimensional simulated computed tomography (CT) reconstruction model of the ventricles. METHODS: Fifteen patients with hydrocephaly underwent multislice, thin-cut CT to geometrically determine the Cartesian coordinates of a new point for optimal posterior ventricular catheterization...
November 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28761682/a-comparative-study-of-different-imaging-modalities-for-successful-percutaneous-left-atrial-appendage-closure
#19
Danny Hf Chow, Gintautas Bieliauskas, Fadi J Sawaya, Oscar Millan-Iturbe, Klaus F Kofoed, Lars Søndergaard, Ole De Backer
OBJECTIVES: Accurate sizing of the left atrial appendage (LAA) is essential when performing percutaneous LAA closure. This study aimed to compare different LAA imaging modalities and sizing methods in order to obtain successful LAA closure. BACKGROUND: Percutaneous LAA closure is an increasingly used treatment strategy to prevent stroke in patients with atrial fibrillation. LAA sizing has typically been done by 2D-transoesophageal echocardiography (TEE). METHODS: Patients who had a preprocedural TEE and preprocedural and postprocedural multislice CT (MSCT) were identified...
2017: Open Heart
https://www.readbyqxmd.com/read/28754439/myocardial-blood-flow-reserve-is-impaired-in-patients-with-aortic-valve-calcification-and-unobstructed-epicardial-coronary-arteries
#20
Karen Nel, Michael C Y Nam, Chris Anstey, Christopher J Boos, Edward Carlton, Roxy Senior, Juan Carlos Kaski, Ahmed Khattab, Delva Shamley, Christopher D Byrne, Tony Stanton, Kim Greaves
BACKGROUND: Although calcific aortic valve disease (CAVD) is associated with coronary atherosclerosis, it is not known whether early CAVD is associated with coronary microcirculatory dysfunction (CMD). We sought to investigate the relationship between myocardial blood flow reserve (MBFR) - a measure of CMD, and early CAVD in the absence of obstructive epicardial coronary artery disease. We also determined whether this relationship was independent of coronary artery disease (CAD) and hs-CRP, a marker of systemic inflammation...
December 1, 2017: International Journal of Cardiology
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