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multislice CT

Meng Li, Shichao Feng, Ning Wu, Li Zhang
OBJECTIVE: The aim of our study was to assess radiation dose reduction and image quality for enhanced chest CT examinations with a scout-based automated tube potential selection technique (kV Assist) compared with a standard 120-kV protocol. METHODS: Prospective study of enhanced chest CT examinations was performed in 100 consecutive patients with kV Assist and in 100 consecutive patients with conventional 120-kV protocol on a multislice CT (Discovery CT750 HD)...
October 18, 2016: Journal of Computer Assisted Tomography
E Royaux, V Martlé, K Kromhout, E Van der Vekens, B J G Broeckx, L Van Ham, I Gielen
Compressive hydrated nucleus pulposus extrusion (HNPE) in dogs is defined as acute extradural compression by hydrated nucleus pulposus material at the level of the associated intervertebral disc. Magnetic resonance imaging (MRI) is the imaging modality of choice for diagnosis of HNPE. The aims of this study were to determine the usefulness of unenhanced computed tomography (CT) and contrast enhanced CT (CE-CT), and the sensitivity and specificity of CE-CT, for detection of compressive HNPE. Using CE-CT, HNPE was visualised as a hypodense extradural compressive lesion with rim enhancement immediately dorsal to the intervertebral disc space, with a sensitivity of 91% and a specificity of 100%...
October 2016: Veterinary Journal
David Goodenough, Josh Levy, Smari Kristinsson, Jesper Fredriksson, Hildur Olafsdottir, Austin Healy
Increasingly, the advent of multislice CT scanners, volume CT scanners, and total body spiral acquisition modes has led to the use of Multi Planar Reconstruction and 3D datasets. In considering 3D resolution properties of a CT system it is important to note that both the in-plane (x,y) and z-axis (slice thickness) influence the visual-ization and detection of objects within the scanned volume. This study investigates ways to consider both the in-plane resolution and the z-axis resolution in a single phantom wherein analytic or visualized analysis can yield information on these combined effects...
2016: Journal of Applied Clinical Medical Physics
N Guberina, U Lechel, M Forsting, A Ringelstein
Various strategies have been developed to reduce radiation exposure of patients in CT examinations. The aim of this study was to evaluate the efficacy of high pitch in representative CT protocols examining lung embolism. We performed thermoluminescence measurements with an anthropomorphic phantom exposing it to CT algorithms for lung embolism in a 128-multislice, dual-source CT scanner: a standard CT protocol (sCT) and a CT protocol with a high pitch (+ F). Radiation doses for both CT algorithms were compared and the dose reduction potential of high pitch for individual organs was evaluated...
September 19, 2016: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
Rashid Saif Al Umairi, Faiza Al Kindi, Fadhila Al Busaidi
Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital coronary abnormality also known as Bland-White-Garland syndrome. The incidence of ALCAPA is about 1 in every 300,000 live births, and constitutes 0.24% and 0.46% of all congenital cardiac disease. It has a high infant mortality rate reaching up to 90% if left untreated. For many years, the diagnosis of ALCAPA was by angiography or autopsy. However, multislice computed tomography (MSCT) is a non-invasive imaging tool that allows accurate, non-invasive diagnosis of ALCAPA...
September 2016: Oman Medical Journal
Jiashou Hu, Zhongwei Li, Yanyan Qu, Jinfeng Sun, Guowei Zhang, Guanghui Zhang
The aim of the present study was to investigate the characteristics and value of 3D dynamic contrast-enhanced magnetic resonance pulmonary angiography (3D-DCE-MRPA) for the diagnosis of pulmonary embolism (PE). Among patients suspected with PE, 30 cases were scheduled for 3D-DCE-MRPA [magnetic resonance imaging (MRI) group], and 30 cases were examined using multislice computed tomographic pulmonary angiography (msCTPA) [computed tomography (CT) group]. Direct signs including location, number, morphology of emboli, and indirect signs such as pulmonary infarction, pneumonia and pleural effusion, were analyzed...
September 2016: Experimental and Therapeutic Medicine
Nicolas Debry, Arnaud Sudre, Ibrahim Elquodeimat, Cédric Delhaye, Guillaume Schurtz, Antoine Bical, Mohamad Koussa, Khalil Fattouch, Thomas Modine
BACKGROUND: Postprocedural aortic regurgitations following transcatheter aortic valve implantation (TAVI) procedures remain an issue. Benefit of oversizing strategies to prevent them isn't well established. We compared different level of oversizing in our cohort of consecutive patients to address if severe oversizing compared to normal sizing had an impact on post-procedural outcomes. METHODS: From January 2010 to August 2013, consecutive patients were referred for TAVI with preoperative Multislice-CT (MSCT) and the procedures were achieved using Edwards Sapien(®) or Corevalve devices(®)...
September 2016: Journal of Geriatric Cardiology: JGC
Verónica García-Vázquez, Eugenio Marinetto, Pedro Guerra, Manlio Fabio Valdivieso-Casique, Felipe Ángel Calvo, Eduardo Alvarado-Vásquez, Claudio Vicente Sole, Kirby Gannett Vosburgh, Manuel Desco, Javier Pascau
Intraoperative electron radiation therapy (IOERT) involves irradiation of an unresected tumour or a post-resection tumour bed. The dose distribution is calculated from a preoperative computed tomography (CT) study acquired using a CT simulator. However, differences between the actual IOERT field and that calculated from the preoperative study arise as a result of patient position, surgical access, tumour resection and the IOERT set-up. Intraoperative CT imaging may then enable a more accurate estimation of dose distribution...
August 23, 2016: Zeitschrift Für Medizinische Physik
Michael S Hofman, Rodney J Hicks
Nuclear medicine renal imaging provides important functional data to assist in the diagnosis and management of patients with a variety of renal disorders. Physiologically stable metal chelates like ethylenediaminetetraacetic acid (EDTA) and diethylenetriamine penta-acetate (DTPA) are excreted by glomerular filtration and have been radiolabelled with a variety of isotopes for imaging glomerular filtration and quantitative assessment of glomerular filtration rate. Gallium-68 ((68)Ga) EDTA PET usage predates Technetium-99m ((99m)Tc) renal imaging, but virtually disappeared with the widespread adoption of gamma camera technology that was not optimal for imaging positron decay...
September 2016: Seminars in Nuclear Medicine
Victor Razafindranaly, Eric Truy, Jean-Baptiste Pialat, Amanda Martinon, Magali Bourhis, Nawele Boublay, Frédéric Faure, Aïcha Ltaïef-Boudrigua
OBJECTIVE: To evaluate the diagnostic concordance between multislice computed tomography (MSCT) and cone beam computed tomography (CBCT) in the early postoperative assessment of patients after cochlear implantation. STUDY DESIGN: Prospective, randomized, single-center, interventional, pilot study on the diagnostic performance of a medical device. SETTING: Tertiary referral center. PATIENTS: Patients aged over 18 years requiring a computed tomographic (CT) scan after cochlear implant surgery...
October 2016: Otology & Neurotology
Mohammad Sakr, Sara M Abdelhakam, Hany Dabbous, Amr Hamed, Zeinab Hefny, Waleed Abdelmoaty, Mohamed Shaker, Mohamed Elgharib, Ahmed Eldorry
BACKGROUND AND AIM: Budd-Chiari syndrome (BCS) is caused by hepatic venous outflow obstruction. This work aimed at analyzing characteristics and factors associated with development of hepatocellular carcinoma (HCC) in patients with primary BCS. METHODS: 348 Egyptian BCS patients were included. They were presented to the Budd-Chiari Study Group of Ain Shams University Hospital. BCS was confirmed using abdominal Doppler US. Abdominal magnetic resonance imaging (MRI), MR venography, and/or multislice computed tomography (CT) were performed to confirm all diagnoses and to assess vascular anatomy...
August 10, 2016: Liver International: Official Journal of the International Association for the Study of the Liver
(no author information available yet)
<strong>Objective </strong>To compare the sensitivity of multislice spiral CT dual phase and somatosatatin receptor scintigraphy (SRS) in the diagnosis of pancreas nuroendocrine tumors (pNET). <strong>Methods </strong>Totally 28 patients with pathologically confirmed pNET recieved both CT dual phase contrast and SRS and the results were compared. <strong>Results </strong> Of these 28 pNET patients,26 (92.8%) were accurately diagnosed by CT dual-phase scan and 20 (71.4%) by SRS (P=0...
June 10, 2016: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
Muhammad Asim Rana, Ahmed F Mady, Nagesh Jakaraddi, Shahzad A Mumtaz, Habib Ahmad, Kamal Naser
Retroperitoneal haemorrhage (or retroperitoneal haematoma) refers to an accumulation of blood found in the retroperitoneal space. It is a rare clinical entity with variable aetiology including anticoagulation, ruptured aortic aneurysm, acute pancreatitis, malignancy, and bleeding from renal aneurysm. Diagnosis of retroperitoneal bleed is sometimes missed or delayed as presentation is often nonspecific. Multislice CT and arteriography are important for diagnosis. There is no consensus about the best management plan for patients with retroperitoneal haematoma...
2016: Case Reports in Critical Care
Atoosa Adibi, Mojgan Mortazavi, Azin Shayganfar, Sima Kamal, Roya Azad, Marzieh Aalinezhad
It is essential to ascertain the state of health and renal function of potential kidney donors before organ removal. In this regard, one of the primary steps is to estimate the donor's glomerular filtration rate (GFR). For this purpose, the modification of diet in renal disease (MDRD) and the Cockcroft-Gault (CG) formulas has been used. However, these two formulas produce different results and finding new techniques with greater accuracy is required. Measuring the renal volume from computed tomography (CT) scan may be a valuable index to assess the renal function...
July 2016: Saudi Journal of Kidney Diseases and Transplantation
Mi Zhou, Yongming Zeng, Renqiang Yu, Yang Zhou, Rui Xu, Jingkun Sun, Zhimei Gao
This study aims to evaluate the ability of C-arm cone-beam CT to detect intracranial hematomas in canine models. Twenty one healthy canines were divided into seven groups and each group had three animals. Autologous blood and contrast agent (3 mL) were slowly injected into the left/right frontal lobes of each animal. Canines in the first group, the control group, were only injected with autologous blood without contrast agent. Each animal in all the 7 groups was scanned with C-arm cone-beam CT and multislice computed tomography (MSCT) after 5 minutes...
February 2016: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
Elizabeth M Jones, Melissa Papio, Boon Ching Tee, Frank M Beck, Henry W Fields, Zongyang Sun
INTRODUCTION: Previous studies have indicated that orthodontic-grade cone-beam computed tomography (CBCT) images are limited when displaying small defects at the mandibular condyles for diagnosis. In this study, we investigated whether this limitation was inherent to CBCT by comparing CBCT with multislice computed tomography (CT), and whether image segmentation and color mapping could overcome this limitation. METHODS: Nine fresh pig heads (18 condyles, 36 medial and lateral condylar regions) were used...
July 2016: American Journal of Orthodontics and Dentofacial Orthopedics
Duygu Herek, Ozkan Herek, Furkan Ufuk
Objectives: The purpose of this study is to investigate if any change exists in the values of tracheal bifurcation angles (subcarinal angle [SCA] and interbronchial angle [IBA]), right and left bronchial angles (RBA and LBA) in different pediatric age groups. Methods: Chest computed tomography (CT) images of children aged 18 years and younger were reviewed retrospectively by two radiologists who were blinded to each other's measurements. One hundred and eighteen children were involved...
June 18, 2016: Clinical and Experimental Otorhinolaryngology
Steven W Warmann, Andrea Schenk, Juergen F Schaefer, Martin Ebinger, Gunnar Blumenstock, Ilias Tsiflikas, Joerg Fuchs
BACKGROUND: In complex malignant pediatric liver tumors there is an ongoing discussion regarding surgical strategy; for example, primary organ transplantation versus extended resection in hepatoblastoma involving 3 or 4 sectors of the liver. We evaluated the possible role of computer-assisted surgery planning in children with complex hepatic tumors. METHODS: Between May 2004 and March 2016, 24 Children with complex liver tumors underwent standard multislice helical CT scan or MRI scan at our institution...
June 1, 2016: Journal of Pediatric Surgery
Viacheslav Chukanov, Frank Bergner
PURPOSE: Recent applications of iterative image reconstruction algorithms to multislice helical CT have shown that iterative reconstruction can significantly improve image quality and reduce artifacts. In this paper, the authors introduce a combination of two different algorithms with different convergence properties: ordered subsets separable paraboloidal surrogates (OS-SPS) and iterative coordinate descent (ICD). The first one updates image voxels simultaneously, slightly changing attenuation values iteration by iteration...
June 2016: Medical Physics
Lorenzo Faggioni, Michela Gabelloni
Computed tomography (CT) technology has seen a dramatic evolution in the recent past that has deeply changed the face of this diagnostic modality. Since the early days of helical single-slice and then multislice CT, CT angiography (CTA) has been one of the most technically demanding applications, both in terms of scanning technique and contrast medium (CM) injection protocol, due to the need to acquire a large amount of high-resolution data over a limited period corresponding to the peak contrast enhancement of the arterial system...
June 1, 2016: Investigative Radiology
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