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https://www.readbyqxmd.com/read/29235436/bioprosthetic-aortic-valve-leaflet-thrombosis-detected-by-multidetector-computed-tomography-is-associated-with-adverse-cerebrovascular-events-a-meta-analysis-of-observational-studies
#1
Hashrul N Rashid, Robert P Gooley, Nitesh Nerlekar, Abdul R Ihdayhid, Liam M McCormick, Arthur Nasis, James D Cameron, Adam J Brown
AIMS: Leaflet thrombosis (LT) has become increasingly recognised following transcatheter and surgical aortic ABV replacement and can be reliably identified by MDCT. However, it is ongoing debate whether MDCT-defined LT is associated with adverse cerebrovascular outcomes. We performed a systematic review and meta-analysis to assess the incidence and clinical outcomes associated with multidetector computed tomography (MDCT)-defined leaflet thrombosis following aortic bioprosthetic valve (ABV) replacement...
December 12, 2017: EuroIntervention
https://www.readbyqxmd.com/read/29234912/advanced-ct-acquisition-protocol-with-a-third-generation-dual-source-ct-scanner-and-iterative-reconstruction-technique-for-comprehensive-prosthetic-heart-valve-assessment
#2
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
https://www.readbyqxmd.com/read/29234688/superior-semicircular-canal-dehiscence-a-new-perspective
#3
Dinesh Sood, Lokesh Rana, Raman Chauhan, Roshni Shukla, Khanak Nandolia
Objective: To determine the use of multi-detector computed tomography (MDCT) in the diagnostic interpretation of superior semicircular canal dehiscence (SSCD) or thinning and its association with ear pathologies and to find whether it is an acquired condition and its association with increase in age. Materials and methods: study was performed in a tertiary care institute present in a village, following approval of the institutional ethical committee. Retrospective review of temporal bone CT examinations performed between September 2016 and March 2017 was done...
2017: European Journal of Radiology Open
https://www.readbyqxmd.com/read/29234638/prospective-comparison-of-gd-eob-dtpa-enhanced-mri-with-dynamic-ct-for-detecting-recurrence-of-hcc-after-radiofrequency-ablation
#4
Yasuharu Imai, Kazuhiro Katayama, Masatoshi Hori, Takayuki Yakushijin, Kenji Fujimoto, Toshifumi Itoh, Takumi Igura, Mitsuru Sakakibara, Manabu Takamura, Masakatsu Tsurusaki, Hiroto Takahashi, Katsuyuki Nakanishi, Noriaki Usuki, Koh Tsuji, Hiroshi Ohashi, Tonsok Kim, Tetsuo Takehara, Takamichi Murakami
Background: We prospectively compared the efficacy of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI) with that of dynamic multidetector computed tomography (MDCT) for detection of recurrent hypervascular hepatocellular carcinoma (HCC) after radiofrequency ablation (RFA). Methods: Institutional review board approval and written informed consent were obtained for this multicenter study. Ninety-seven HCC patients treated with curative RFA underwent both Gd-EOB-DTPA-enhanced MRI and dynamic MDCT every 3-4 months...
November 2017: Liver Cancer
https://www.readbyqxmd.com/read/29223726/computed-tomography-measurement-of-the-left-atrial-appendage-for-optimal-sizing-of-the-watchman-device
#5
Bo Xu, Jorge Betancor, Kimi Sato, Serge Harb, Karim Abdur Rehman, Kunal Patel, Arnav Kumar, Paul C Cremer, Wael Jaber, L Leonardo Rodriguez, Paul Schoenhagen, Oussama Wazni
INTRODUCTION: Percutaneous left atrial appendage (LAA) occlusion is an emerging treatment option for patients with non-valvular atrial fibrillation who cannot tolerate oral anticoagulation. The Watchman device (Boston Scientific Corporation, Natick, MA, USA) is deployed at the ostium of the LAA, and an appropriately sized device is critical for successful occlusion. However, standardized imaging protocols for device sizing have not been established. OBJECTIVES: We investigated the clinical utility of a standardized imaging protocol, with pre-procedural multi-detector cardiac computed tomography (MDCT), and intra-procedural transesophageal echocardiography (TEE), for Watchman device sizing...
December 5, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29222688/comparison-of-qualitative-and-quantitative-ct-and-mri-parameters-for-monitoring-of-longitudinal-spine-involvement-in-patients-with-multiple-myeloma
#6
M Horger, J Fritz, W M Thaiss, H Ditt, K Weisel, M Haap, Christopher Kloth
PURPOSE: To compare qualitative and quantitative computed tomography (CT) and magnetic resonance imaging (MRI) parameters for longitudinal disease monitoring of multiple myeloma (MM) of the axial skeleton. MATERIALS AND METHODS: We included 31 consecutive patients (17 m; mean age 59.20 ± 8.08 years) with MM, who underwent all baseline (n = 31) and at least one or more (n = 47) follow-up examinations consisting of multi-parametric non-enhanced whole-body MRI (WBMRI) and non-enhanced whole-body reduced-dose thin-section MDCT (NEWBMDCT) between 06/2013 and 09/2016...
December 8, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/29218612/transoesophageal-echocardiography-prior-to-catheter-ablation-could-be-avoided-in-atrial-fibrillation-patients-with-a-low-risk-of-stroke-and-without-filling-defects-in-the-late-phase-mdct-scan-a-retrospective-analysis-of-783-patients
#7
Zhengqin Zhai, Min Tang, Shu Zhang, Pihua Fang, Yuhe Jia, Tianjie Feng, Jiande Wang
OBJECTIVES: To test whether multidetector computed tomography (MDCT) could completely replace transoesophageal echocardiography (TEE) to detect left atrial appendage (LAA) thrombi in atrial fibrillation (AF) patients using a large sample size. METHODS: 783 patients with AF who underwent MDCT and TEE before catheter ablation were retrospectively included. Demographic data were obtained. Two radiologists blinded to clinical data made the imaging diagnosis. RESULTS: Most of the patients (96...
December 7, 2017: European Radiology
https://www.readbyqxmd.com/read/29212274/extramural-vascular-invasion-detected-by-contrast-enhanced-multiple-row-detectors-computed-tomography-cemdct-as-a-predictor-of-synchronous-metastases-in-colon-cancer
#8
Su-Xing Yang, Xun Yao, Xing-He Song, Yan-Cheng Cui, Ying-Jiang Ye, Yi Wang
Background: Extramural Vascular Invasion (EMVI) is histologically defined as the presence of tumor cells beyond the muscularis propria in vessels resulting in disease metastases. Objective: To determine whether EMVI, detected by contrast-enhanced multiple-row detectors computed tomography (MDCT), has closely association with synchronous metastases in colon cancer. Methods: Patients with pathology proven colon cancer were included in this retrospective study...
November 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/29198001/imaging-findings-of-recurrent-pancreatic-cancer-following-resection
#9
S Javadi, N Karbasian, P Bhosale, S de Castro Faria, O Le, M H Katz, E J Koay, E P Tamm
Pancreatic cancer is a challenging malignancy to treat, largely due to aggressive regional involvement, early systemic dissemination, high recurrence rate, and subsequent low patient survival. Generally, 15-20% of newly diagnosed pancreatic cancers are candidates for possible curative resection. Eighty percent of these patients, however, will experience locoregional or distant recurrence in first 2 years. Although there is no strong evidence-based guideline for optimal surveillance after pancreatic cancer resection, careful comparison of surveillance follow-up multi-detector CT (MDCT) studies with a postoperative baseline MDCT examination aids detection of early recurrent pancreatic cancer...
December 2, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29192372/prediction-of-resectability-in-pseudomyxoma-peritonei-with-a-new-ct-score
#10
Morgane Bouquot, Anthony Dohan, Etienne Gayat, Maxime Barat, Olivier Glehen, Marc Pocard, Pascal Rousset, Clarisse Eveno
BACKGROUND: Curative treatment of pseudomyxoma peritonei (PMP) is complete cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC). OBJECTIVE: The aim of this study was to build and evaluate a preoperative imaging score to predict resectability. PATIENTS AND METHODS: Between 2007 and 2014, all PMP patients in two tertiary reference centers who underwent laparotomy with intent to undergo CRS and HIPEC were included in this study retrospectively...
November 30, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29189405/intrahepatic-mass-forming-cholangiocarcinoma-relationship-between-computed-tomography-characteristics-and-histological-subtypes
#11
Ju Gang Nam, Jeong Min Lee, Ijin Joo, Su Joa Ahn, Jin Young Park, Kyoung Bun Lee, Joon Koo Han
OBJECTIVE: The aim of this study was to determine the value of multi-detector row computed tomography (MDCT) in differentiating the small-duct (SD) and large-duct (LD) types of intrahepatic mass-forming cholangiocarcinomas (IMCCs) and predicting patient prognosis. METHODS: The 4-phase MDCT image findings of 82 patients with surgically confirmed IMCCs (60 SD-type and 22 LD-type IMCCs) were compared between 2 types using univariate and multivariate analyses. Overall survival rates for 78 patients with available information were compared using the Kaplan-Meier method...
November 16, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29174341/feasibility-accuracy-and-reproducibility-of-aortic-annular-and-root-sizing-for-transcatheter-aortic-valve-replacement-using-novel-automated-three-dimensional-echocardiographic-software-comparison-with-multi-detector-row-computed-tomography
#12
Edgard A Prihadi, Philippe J van Rosendael, E Mara Vollema, Jeroen J Bax, Victoria Delgado, Nina Ajmone Marsan
BACKGROUND: In transcatheter aortic valve replacement (TAVR), multi-detector row computed tomography (MDCT) is currently the standard imaging modality for correct prosthesis sizing, despite risks of radiation and contrast-induced renal injury. Three-dimensional (3D) transesophageal echocardiography (TEE) has been proposed as a potential alternative imaging technique, and recently, automated 3D transesophageal echocardiographic software (Aortic Valve Navigator [AVN], an unreleased prototype from Philips) has been developed for assessment of the aortic annulus and root...
November 23, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/29169676/gastrointestinal-stromal-tumor-of-the-jejunum-with-active-bleeding-demonstrated-on-dual-energy-mdct-angiography-a-case-report
#13
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
https://www.readbyqxmd.com/read/29167830/single-injection-dual-phase-cbct-technique-ameliorates-results-of-trans-arterial-chemoembolization-for-hepatocellular-cancer
#14
REVIEW
Pierleone Lucatelli, Renato Argirò, Stefano Bascetta, Luca Saba, Carlo Catalano, Mario Bezzi, Giovanni Battista Levi Sandri
Cone-beam CT (CBCT) application to the field of trans-arterial chemoembolization has been recently the focus of several researches. This imaging modality is performed with a rotation of the C-arm around the patient, without needs of patient repositioning. Datasets are immediately processed, obtaining volumetric CT-like images with the possibility of post-processing and reconstruction of images. Dual phase CBCT recently introduced in clinical practice consists in a first arterial acquisition followed by a delayed acquisition corresponding to a venous phase...
2017: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29157544/radiology-of-implant-dentistry
#15
REVIEW
Asma'a Abdurrahman Al-Ekrish
The article presents an overview of the goal of imaging at each stage of implant therapy and the usefulness and limitations of multidetector computed tomography (MDCT) in achieving those goals. Various MDCT protocols of use in implant imaging also are presented, with an emphasis on dose reduction and the use of iterative reconstruction techniques. Also discussed are options for viewing and analysis of CT images, issues related to appropriate image reformatting and interpretation, interactive treatment planning, and transfer of information from the images to the surgical field during implant surgery using surgical guides and CT-guided navigation systems...
January 2018: Radiologic Clinics of North America
https://www.readbyqxmd.com/read/29137440/comparison-of-dwi-and-18-f-fdg-pet-ct-for-assessing-preoperative-n-staging-in-gastric-cancer-evidence-from-a-meta-analysis
#16
Mingxu Luo, Hongmei Song, Gang Liu, Yikai Lin, Lintao Luo, Xin Zhou, Bo Chen
The diagnostic values of diffusion weighted imaging (DWI) and (18)F-fluorodeoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) for N-staging of gastric cancer (GC) were identified and compared. After a systematic search to identify relevant articles, meta-analysis was used to summarize the sensitivities, specificities, and areas under curves (AUCs) for DWI and PET/CT. To better understand the diagnostic utility of DWI and PET/CT for N-staging, the performance of multi-detector computed tomography (MDCT) was used as a reference...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29134567/abdominal-pain-in-patient-with-antiphospholipid-syndrome-the-role-of-mdct-angiography-on-visceral-blood-vessels
#17
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...
November 13, 2017: Immunologic Research
https://www.readbyqxmd.com/read/29128993/pancreatic-adenocarcinoma-cross-sectional-imaging-techniques
#18
Naveen M Kulkarni, David M Hough, Parag P Tolat, Erik V Soloff, Avinash R Kambadakone
Pancreatic adenocarcinoma is a common malignancy that has a poor prognosis. Imaging is vital in its detection, staging, and management. Although a variety of imaging techniques are available, MDCT is the preferred imaging modality for staging and assessing the resectability of pancreatic adenocarcinoma. MR also has an important adjunct role, and may be used in addition to CT or as a problem-solving tool. A dedicated pancreatic protocol should be acquired as a biphasic technique optimized for the detection of pancreatic adenocarcinoma and to allow accurate local and distant disease staging...
November 11, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29125334/submillisievert-chest-dual-energy-computed-tomography-a-pilot-study
#19
Rodrigo Canellas, Jeanne B Ackman, Subba R Digumarthy, Melissa Price, Alexi Otrakji, Shaunagh McDermott, Amita Sharma, Mannudeep K Kalra
OBJECTIVE: To assess if diagnostic dual energy CT of the chest can be achieved at submillisievert doses (sub-mSv). METHODS: Our IRB-approved prospective study included 20 patients who were scanned on dual-source MDCT. All patients gave written informed consent for acquisition of additional image series at reduced radiation dose on a dual-source MDCT (80/140kV) within 10 seconds after the standard of care acquisition. Dose reduction was achieved by reducing the quality reference mAs, with combined angular exposure control...
November 10, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29124381/intraprocedural-3d-perfusion-measurement-during-chemoembolisation-with-doxorubicin-eluting-beads-in-liver-metastases-of-malignant-melanoma
#20
Philippe L Pereira, Kristina Krüger, Ernst Hohenstein, Florian Welke, Christof Sommer, Friedegund Meier, Thomas Eigentler, Claus Garbe
OBJECTIVES: To study feasibility and validity of a new software application for intraprocedural assessment of perfusion during chemoembolisation of melanoma metastases. METHODOLOGY: In a prospective phase-II trial, ten melanoma patients with liver-only metastases underwent chemoembolisation with doxorubicin-eluting beads (DEBDOX-TACE). Tumour perfusion was evaluated immediately before and after treatment at cone beam computer tomography (CBCT) using a new software application...
November 9, 2017: European Radiology
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