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MDCT angiography

P Freyhardt, N Solowjowa, G Böning, J Kahn, B Aufmesser, P Haage, F Streitparth
OBJECTIVES: Aim of the study was the comparison of high-pitch dual-source CTA of the aorta acquired with different tube currents and methods of image reconstruction in patients with Marfan Disease (MFS). BACKGROUND: Patients with MFS receive repeatedly CT examinations of the entire aorta what leads to high cumulative lifetime radiation doses. Routine clinical use of low-kV-protocols in combination with iterative reconstruction for imaging of the aorta is still limited although this approach may be of great benefit for patients in need of serial follow-up scans...
February 15, 2018: Clinical Imaging
Shawn Haji-Momenian, Amy Ellenbogen, Nadia Khati, Myles Taffel, James Earls, Greggory Miller, Robert K Zeman
OBJECTIVE: The purpose of this study is to compare dose-length product (DLP)-based calculation of effective dose (EDDLP) with Monte Carlo simulation organ-based calculation of effective dose (EDMCO) in 16- and 64-MDCT examinations, with the use of clinical examinations with automatic tube current modulation. MATERIALS AND METHODS: Dose data were obtained from 50 consecutive unenhanced head CT examinations, unenhanced chest CT examinations, and unenhanced and contrast-enhanced abdominopelvic CT examinations performed using 16- and 64-MDCT scanners, as well as from 50 pulmonary CT angiography (CTA) examinations performed using a 64-MDCT scanner and 31 pulmonary CTA examinations performed using a 16-MDCT scanner...
January 30, 2018: AJR. American Journal of Roentgenology
Keita Minowa, Shuhei Komatsu, Kenichiro Takashina, Sachie Tanaka, Tatsuya Kumano, Kenichiro Imura, Katsumi Shimomura, Jun Ikeda, Fumihiro Taniguchi, Yasuo Ueshima, Tecchuu Lee, Eito Ikeda, Eigo Otsuji, Yasuhiro Shioaki
Massive gastrointestinal bleeding from gastrointestinal varices is one of the most serious complications in patients with portal hypertension. However, if no bleeding point can be detected by endoscopy in the predilection sites of gastrointestinal varices, such as the esophagus and stomach, ectopic gastrointestinal variceal bleeding should be considered as a differential diagnosis. Herein, we report a case of ectopic ileal variceal bleeding in a 57-year-old woman, which was successfully diagnosed by multi-detector row CT (MDCT) and angiography and treated by segmental ileum resection...
December 27, 2017: World Journal of Gastrointestinal Surgery
Anne Günther, Lars Aaberge, Andreas Abildgaard, Asgrimur Ragnarsson, Thor Edvardsen, Jarl Jakobsen, Rune Andersen
Background Cardiac allograft vasculopathy (CAV) is an accelerated form of atherosclerosis unique to heart transplant (HTX) patients. Purpose To investigate the detection of significant coronary artery stenosis and CAV, determinants of image quality, and the radiation dose in coronary computed tomography angiography (CCTA) of HTX patients with 64-slice multidetector CT (64-MDCT). Material and Methods Fifty-two HTX recipients scheduled for invasive coronary angiography (ICA) were prospectively enrolled and underwent CCTA before ICA with intravascular ultrasound (IVUS)...
January 1, 2017: Acta Radiologica
Marguerite E Faure, Laurens E Swart, Marcel L Dijkshoorn, Jos A Bekkers, Marcel van Straten, Koen Nieman, Paul M Parizel, Gabriel P Krestin, Ricardo P J Budde
OBJECTIVES: Multidetector CT (MDCT) is a valuable tool for functional prosthetic heart valve (PHV) assessment. However, radiation exposure remains a concern. We assessed a novel CT-acquisition protocol for comprehensive PHV evaluation at limited dose. METHODS: Patients with a PHV were scanned using a third-generation dual-source CT scanner (DSCT) and iterative reconstruction technique (IR). Three acquisitions were obtained: a non-enhanced scan; a contrast-enhanced, ECG-triggered, arterial CT angiography (CTA) scan with reconstructions at each 5 % of the R-R interval; and a delayed high-pitch CTA of the entire chest...
December 12, 2017: European Radiology
Abdul Razik, Kumble S Madhusudhan, Abhishek Aggarwal, Rajesh Panwar, Deep N Srivastava
Gastrointestinal stromal tumor (GIST) is the most common mesenchymal tumor of the gastrointestinal tract and may occasionally present with acute gastrointestinal bleed (GIB). Multidetector computed tomography (MDCT) angiography is extremely useful in demonstrating the tumor as well as the presence of active hemorrhage, thereby guiding subsequent interventional or surgical management. We report a case of a 38-year-old man who presented with acute-onset melena and compensated shock, whose source of bleed remained elusive on endoscopy...
October 31, 2017: Current Problems in Diagnostic Radiology
Jovica Saponjski, Ljudmila Stojanovich, Jelena Saponjski, Milorad Mirilovic, Dusan Saponjski
Antiphospholipid syndrome (APS) is an autoimmune disease defined by accelerated atherosclerosis, arterial and venous thrombosis, fetal loss, and the presence of antiphospholipid antibodies (aPL) in the serum and which leads to the occurrence of various vascular events. Nonspecific abdominal pain can be one of the symptoms due to changes on visceral blood vessels. The goal of our work is to show the results we obtained in multidetector computed tomography (MDCT) angiography examination of visceral arteries, comparing patients with primary antiphospholipid syndrome (PAPS) and secondary antiphospholipid syndrome (SAPS) with control group...
December 2017: Immunologic Research
Florian Jungmann, Tilman Emrich, Peter Mildenberger, Anna Lena Emrich, Christoph Düber, K F Kreitner
Background Coronary artery bypass grafting (CABG) is still an important therapeutic approach in the treatment especially of advanced coronary artery disease. In this study, we elucidate the current role of multidetector computed tomography angiography (MD-CTA) in imaging patients after CABG surgery. Method This study is based on recent reports in the literature (2007 - 2016) on imaging of CABG using 64-slice MD-CT scanners and beyond. We included 13 reports that compared ECG-gated MD-CTA with conventional invasive coronary angiography (ICA) as the reference standard for the assessment of graft patency and for the detection of > 50 % stenoses...
November 3, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
Andrea Bartykowszki, Márton Kolossváry, Ádám Levente Jermendy, Júlia Karády, Bálint Szilveszter, Mihály Károlyi, Orsolya Balogh, Balázs Sax, Béla Merkely, Pál Maurovich-Horvat
OBJECTIVE: Cardiac allograft vasculopathy (CAV) is among the top causes of death 1 year after heart transplantation (HTx). Coronary CT angiography (CTA) is a potential alternative to invasive imaging in the diagnosis of CAV. However, the higher heart rate (HR) of HTx recipients prompts the use of retrospective ECG-gating, which is associated with higher radiation dose, a major concern in this patient population. Therefore, we sought to evaluate the feasibility and image quality of low-radiation-dose prospectively ECG-triggered coronary CTA in HTx recipients...
February 2018: AJR. American Journal of Roentgenology
Hasan B Altinsoy, Ozkan Alatas, Hidayet Kayancicek, Erhan Hafiz, Omer F Dogan
OBJECTIVE: This study aimed to evaluate the bilateral forehand circulation using a 64-channel multidetector computed tomography (MDCT) as a noninvasive method to define criteria for an upper extremity arterial anatomy and pathology prior to the use of arterial conduits. MATERIALS AND METHODS: Fifty-five patients with coronary artery disease who underwent total arterial coronary artery bypass grafting (CABG) were randomly selected for this prospective study. MDCT angiography was performed for 110 examinations of forearm and hand arterial anatomy...
July 2017: Indian Journal of Radiology & Imaging
Muhammad Arifuzzaman, Syeda Sawaira Nasim Naqvi, Hatem Adel, Syed Omair Adil, Mahreen Rasool, Munawar Hussain
BACKGROUND: Multidetector Computed Tomography (MDCT)s has become a major part in evaluation of hepatic and renal tumours. With improvements in MDCT, CT angiography has also improved and normal anatomy and its variants in patients undergoing operative or interventional procedures can be effectively studied. The purpose of this study was to evaluate the frequency of anatomical variation of celiac trunk, hepatic and renal arterial systems in patients undergoing multidetector CT (MDCT) angiography of the abdominal aorta...
July 2017: Journal of Ayub Medical College, Abbottabad: JAMC
A Yu Razumovsky, Z B Mitupov, E V Feoktistova, A I Gurevich, E A Titova, A A Yusufov, V V Svetlov, Yu V Nagornaya
MATERIAL AND METHODS: For the period 2013-2016 four patients were treated at the Filatov Children's City Clinical Hospital #13. There were 2 children aged 14 years and 2 children aged 17 years. All patients have been diagnosed via anamnesis, complaints, pulse-wave doppler sonography, contrast-enhanced MDCT and angiography. After comprehensive examination 3 patients underwent laparoscopic decompression of celiac trunk. In all cases celiac trunk compression was predominantly caused by median arcuate ligament of the diaphragm combined with neurofibrotic tissue of celiac plexus...
2017: Khirurgiia
Maria Mohiuddin, Arsalan Manzoor, Muhammad Ali, Nuzhat Hassan
OBJECTIVE: To determine a reference range of renal artery measurements by using Multidetector Computed Tomography (MDCT) angiography and to find association of renal artery measurements with side of artery, gender and age. METHOD: Two hundred and fifty study participants without renal artery disease who werepresented to Radiology Department, Ziauddin Hospital, Karachi, from November, 2016 to April, 2017 were included in this study. Main renal artery measurements were taken on Multidetector computed angiography and variation with side, gender and age were analyzed...
July 2017: Pakistan Journal of Medical Sciences Quarterly
Le Qin, ZePeng Ma, FuHua Yan, WenJie Yang
PURPOSE: To investigate the image quality (IQ) of reduced radiation dose (RRD) renal artery CT angiography (CTA) using iterative model reconstruction (IMR) algorithm at different tube voltage. METHODS: Renal artery CTA scans were acquired with a 256-MDCT scanner on 84 patients assigned into four groups. Group 4 was scanned as standard radiation dose (SRD) group: 120 kVp, automatic tube current modulation (ATCM) technique with an Image Quality Index of 20, and filtered back projection (FBP) algorithm...
October 20, 2017: La Radiologia Medica
Alexandra Grosse, Claudia Grosse, Irene M Lang
OBJECTIVE: The purpose of this study was to discern imaging findings that separate chronic thromboembolic pulmonary hypertension (CTEPH) from other causes of pulmonary hypertension (PH). MATERIALS AND METHODS: A total of 143 patients with proven PH (group 1, pulmonary arterial hypertension; group 2, PH due to left heart disease; group 3, PH due to lung disease; group 4, CTEPH; and group 5, PH due to unclear or multifactorial mechanisms) underwent MDCT angiography...
December 2017: AJR. American Journal of Roentgenology
Masahiko Asami, Kyohei Yamaji, Jiro Aoki, Shuzou Tanimoto, Mika Watanabe, Yu Horiuchi, Koichi Furui, Nahoko Kato, Kazuhiro Hara, Kengo Tanabe
Previous studies reporting that statin increases coronary artery calcium (CAC) were conducted exclusively on patients with statin as a prevention, regardless of the presence or absence of dyslipidemia. The impact of sex on CAC has not been fully evaluated. We aimed to determine the association of dyslipidemia and sex with CAC using 320-row multi-detector computed tomography (MDCT).Of the 356 consecutive patients who underwent coronary MDCT, 251 patients were enrolled, after excluding those with prior stenting and/or coronary bypass grafting or images showing motion artifacts...
October 21, 2017: International Heart Journal
Daryoush Khoramian, Soroush Sistani
GOAL: To estimate and compare the radiation dose associated with coronary computed tomography angiography (CCTA) examinations on two multi-detector CT scanners (MDCT), 64-MDCT and 128-MDCT, in daily practice. METHODS: Scan parameters of 90 patients undergoing retrospective electrocardiographic gating spiral CCTA exam were recorded during a period on a single-source 64-MDCT and a dual-source 128-MDCT, and average scan parameters were derived that were used for dosimetry...
September 14, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
Anaïs Winchenne, Jérôme Cecchini, Jean-François Deux, Nicolas De Prost, Keyvan Razazi, Guillaume Carteaux, Frederic Galacteros, Anoosha Habibi, Pablo Bartolucci, Giovanna Melica, Mehdi Khellaf, Marc Michel, Bernard Maitre, Armand Mekontso Dessap
Pulmonary artery thrombosis (PAT) is involved in lung vascular dysfunction during acute chest syndrome (ACS) complicating sickle cell disease (SCD). No clinical score is available to identify patients eligible for multi-detector computed tomography (MDCT) angiography during ACS. This retrospective study aimed to develop a risk score for PAT during ACS (PAT-ACS risk score). Patients with SCD were investigated by MDCT during ACS. A logistic regression was performed to determine independent risks factors for PAT and to build the PAT-ACS risk score...
November 2017: British Journal of Haematology
Mohamad Tufail Sheikh, Mohd Tafazul Sheikh, Masrat Jan, Hayat A Khan, Guru P Vashisht, Mohd L Wani
INTRODUCTION: Multi-Detector Computed Tomography (MDCT) has revealed excellent results in various systems of the body. Its role in abdominal imaging for solid viscera has been proved beyond doubt. It is an emerging non invasive tool for evaluation of bowel diseases. AIM: To see the efficacy of MDCT in evaluation of various bowel diseases. MATERIALS AND METHODS: The study was carried out in the Department of Radiodiagnosis and Imaging, Batra Hospital and Medical Research Centre, Delhi, India...
July 2017: Journal of Clinical and Diagnostic Research: JCDR
E Shotar, P Soyer, M Barat, R Dautry, M Pocard, V Placé, M Camus, C Eveno, M Barret, A Dohan
PURPOSE: To compare the respective values of arterial phase, portal venous phase and combination of phases using 64-section multidetector computed tomography (MDCT) for diagnosing acute overt gastrointestinal bleeding (AOGIB). PATIENTS AND METHODS: Forty-nine patients with AOGIB were included. There were 30 men and 19 women, with a mean age of 65.4±15.6 (SD) years [range, 34-91years]. Two observers reviewed MDCT examinations in consensus for presence of active bleeding, location of bleeding site and nature of causative lesion...
December 2017: Diagnostic and Interventional Imaging
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