keyword
MENU ▼
Read by QxMD icon Read
search

mdct

keyword
https://www.readbyqxmd.com/read/28314916/texture-analysis-of-the-liver-at-mdct-for-assessing-hepatic-fibrosis
#1
Meghan G Lubner, Kyle Malecki, John Kloke, Balaji Ganeshan, Perry J Pickhardt
PURPOSE: To evaluate CT texture analysis (CTTA) for staging of hepatic fibrosis (stages F0-F4) METHODS: Quantitative texture analysis (QTA) of the liver was performed on abdominal MDCT scans using commercially available software (TexRAD), which uses a filtration-histogram statistic-based technique. Single-slice ROI measurements of the total liver, Couinaud segments IV-VIII, and segments I-III were obtained. CTTA parameters were correlated against fibrosis stage (F0-F4), with biopsy performed within one year for all cases with intermediate fibrosis (F1-F3)...
March 17, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28314613/improved-image-quality-with-simultaneously-reduced-radiation-exposure-knowledge-based-iterative-model-reconstruction-algorithms-for-coronary-ct-angiography-in-a-clinical-setting
#2
Florian André, Philipp Fortner, Mani Vembar, Dirk Mueller, Wolfram Stiller, Sebastian J Buss, Hans-Ulrich Kauczor, Hugo A Katus, Grigorios Korosoglou
BACKGROUND: The aim of this study was to assess the potential for radiation dose reduction using knowledge-based iterative model reconstruction (K-IMR) algorithms in combination with ultra-low dose body mass index (BMI)-adapted protocols in coronary CT angiography (coronary CTA). METHODS: Forty patients undergoing clinically indicated coronary CTA were randomly assigned to two groups with BMI-adapted (I: <25.0 kg/m(2), II: <28.0 kg/m(2), III: <30.0 kg/m(2), IV: ≥30...
February 23, 2017: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/28303852/differentiation-of-lymphoma-presenting-as-retroperitoneal-mass-and-retroperitoneal-fibrosis-evaluation-with-multidetector-row-computed-tomography
#3
Shuai Zhang, Min Chen, Chun-Mei Li, Guo-Dong Song, Ying Liu
BACKGROUND: Retroperitoneal fibrosis (RPF) and lymphoma presenting as retroperitoneal mass may closely resemble each other and misdiagnosis may occur. This study investigated the differential imaging features of RPF and lymphoma which presented as a retroperitoneal soft tissue using multidetector-row computed tomography (MDCT). METHODS: The 42 consecutive patients were included in this retrospective review, including 19 RPF patients (45.2%; including 13 males and 6 females; mean age: 56...
March 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28303634/novel-integrated-3d-multidetector-computed-tomography-and-fluoroscopy-fusion-for-left-atrial-appendage-occlusion-procedures
#4
A K Roy, J Horvilleur, B Cormier, M Cazalas, L Fernandez, M Patane, A Neylon, M Spaziano, F J Sawaya, T Arai, E Bouvier, T Hovasse, T Lefèvre, B Chevalier, P Garot
OBJECTIVES: This report demonstrates the application and feasibility of novel 3D-MDCT real-time fusion technology with fluoroscopy, for left atrial appendage (LAA) occlusion procedures. BACKGROUND: A successful LAA occlusion procedure relies on multiple imaging modalities, including TEE or 3D-MDCT, and fluoroscopy. Effectively integrating these imaging modalities may improve implantation safety and success. To our knowledge this technique has not been previously described for LAA occlusions...
March 17, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28298257/the-diagnostic-advantage-of-eob-mr-imaging-over-ct-in-the-detection-of-liver-metastasis-in-patients-with-potentially-resectable-pancreatic-cancer
#5
Takaaki Ito, Teiichi Sugiura, Yukiyasu Okamura, Yusuke Yamamoto, Ryo Ashida, Takeshi Aramaki, Masahiro Endo, Katsuhiko Uesaka
BACKGROUND: Liver metastases (LMs) are sometimes diagnosed intraoperatively, even when multidetector-row computed tomography (MDCT) reveals no LM in the staging of pancreatic cancer (PC). Gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid-enhanced magnetic resonance imaging (EOB-MR imaging) may have a role to play in the detection of LM. METHODS: The present study included a total of 201 patients who underwent an EOB-MR imaging examination before undergoing surgical resection for pancreatic cancer that was determined to be radiologically-resectable by MDCT...
March 8, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28289946/systematic-evaluation-of-concomitant-extensor-tendon-sheath-injury-in-patients-with-distal-intra-articular-radial-fractures-in-mdct-using-the-floating-fat-sign
#6
Amelie von Schneider-Egestorf, Bernhard Meyer, Frank Wacker, Herbert Rosenthal, Christian von Falck
OBJECTIVES: We aimed to evaluate the involvement of extensor tendon sheaths in a large MDCT study group of patients with distal intra-articular radial fractures using the floating fat sign. METHODS: 603 MDCT scans of patients with acute intra-articular distal radial fractures (Frykman III-VIII) acquired between January 2005 and October 2011 were analysed in consensus by two radiologists. The extensor tendon sheath involvement was assessed for each extensor tendon compartment and visually graded from 0 to 2 based on the amount of fat-fluid levels...
March 13, 2017: European Radiology
https://www.readbyqxmd.com/read/28288528/4d-ct-angiography-with-arterial-and-venous-phase-anatomical-pre-surgical-approaches-in-cases-with-head-and-neck-neoplasms
#7
Hsiou-Chun Lin, Kou-Mou Huang, Yung-Cheng Wang
PURPOSE: The relationship between neoplasm and its surrounding vascular structure is essential to the following clinical treatment plan. In this study, 4D computed tomography angiography (4D-CTA) with a wide scan range and dynamic phases of arteriography and venography was used to describe detailed anatomical information for pre-surgical approaches. MATERIALS AND METHODS: From January 2011 to February 2012, we subjected 13 patients with head and neck neoplasms to 4D-CTA...
March 14, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28286755/aneurysms-of-peripancreatic-arterial-arcades-coexisting-with-celiac-trunk-stenosis-or-occlusion-single-institution-experience
#8
Robert Antoniak, Laretta Grabowska-Derlatka, Ireneusz Nawrot, Andrzej Cieszanowski, Olgierd Rowiński
Introduction. True aneurysms of peripancreatic arterial arcades (PAAAs) are rare. Most of them coexist with celiac axis stenosis/occlusion due to median arcuate ligament (MAL) compression or atherosclerosis. The aim of this study was to evaluate the cause of celiac axis lesion and characterize the anatomy of the aneurysms. These findings may have important management implications. Material and Methods. A retrospective analysis of 15 patients with true PAAAs was performed. The diagnosis was established by contrast-enhanced CT, using a 64-MDCT scanner...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28281114/value-of-3d-printing-for-the-comprehension-of-surgical-anatomy
#9
Stefania Marconi, Luigi Pugliese, Marta Botti, Andrea Peri, Emma Cavazzi, Saverio Latteri, Ferdinando Auricchio, Andrea Pietrabissa
BACKGROUND: In a preliminary experience, we claimed the potential value of 3D printing technology for pre-operative counseling and surgical planning. However, no objective analysis has ever assessed its additional benefit in transferring anatomical information from radiology to final users. We decided to validate the pre-operative use of 3D-printed anatomical models in patients with solid organs' diseases as a new tool to deliver morphological information. METHODS: Fifteen patients scheduled for laparoscopic splenectomy, nephrectomy, or pancreatectomy were selected and, for each, a full-size 3D virtual anatomical object was reconstructed from a contrast-enhanced MDCT (Multiple Detector Computed Tomography) and then prototyped using a 3D printer...
March 9, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28280876/quantitative-computer-aided-diagnostic-algorithm-for-automated-detection-of-peak-lesion-attenuation-in-differentiating-clear-cell-from-papillary-and-chromophobe-renal-cell-carcinoma-oncocytoma-and-fat-poor-angiomyolipoma-on-multiphasic-multidetector-computed
#10
Heidi Coy, Jonathan R Young, Michael L Douek, Matthew S Brown, James Sayre, Steven S Raman
OBJECTIVE: To evaluate the performance of a novel, quantitative computer-aided diagnostic (CAD) algorithm on four-phase multidetector computed tomography (MDCT) to detect peak lesion attenuation to enable differentiation of clear cell renal cell carcinoma (ccRCC) from chromophobe RCC (chRCC), papillary RCC (pRCC), oncocytoma, and fat-poor angiomyolipoma (fp-AML). MATERIALS AND METHODS: We queried our clinical databases to obtain a cohort of histologically proven renal masses with preoperative MDCT with four phases [unenhanced (U), corticomedullary (CM), nephrographic (NP), and excretory (E)]...
March 9, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28280520/linking-lung-airway-structure-to-pulmonary-function-via-composite-bridge-regression
#11
Kun Chen, Eric A Hoffman, Indu Seetharaman, Feiran Jiao, Ching-Long Lin, Kung-Sik Chan
The human lung airway is a complex inverted tree-like structure. Detailed airway measurements can be extracted from MDCT-scanned lung images, such as segmental wall thickness, airway diameter, parent-child branch angles, etc. The wealth of lung airway data provides a unique opportunity for advancing our understanding of the fundamental structure-function relationships within the lung. An important problem is to construct and identify important lung airway features in normal subjects and connect these to standardized pulmonary function test results such as FEV1%...
December 2016: Annals of Applied Statistics
https://www.readbyqxmd.com/read/28271996/multi-detector-computed-tomography-mdct-findings-of-seven-cases-with-spontaneous-regression-of-hepatocellular-carcinoma
#12
Adel El-Badrawy
PURPOSE: To review Multi-detector CT findings of seven cases with spontaneous regression of hepatocellular carcinomas (HCC). MATERIALS AND METHODS: This retrospective study included 7 patients confirmed with diagnosis of HCC. Triphasic CT scan using multi-detector CT scanner was done for all patients. They were 2 women and 5 men. 1st patient presented with metastatic HCC underwent fine needle aspiration cytology (FNAC) from vertebral metastasis. 2nd patient underwent only one session of trans-arterial chemo-lipidol...
January 2017: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28270296/multidetector-ct-for-restaging-locally-advanced-esophageal-squamous-cell-carcinoma-and-assessing-therapeutic-response-to-neoadjuvant-chemotherapy
#13
Yanjie Shi, Ying Chen, Xiaoting Li, Zhilong Wang, Yingshi Sun
Objective To assess the diagnostic accuracy of multidetector CT (MDCT) for restaging of patients with esophageal squamous cell carcinoma (SCC) after neoadjuvant chemotherapy and determine the feasibility of CT for assessing the treatment response and evaluating the prognosis. Methods Totally 135 patients with esophageal SCC who had received neoadjuvant treatment and surgery in Beijing Cancer Hospital from September 2005 to December 2011 were enrolled in this study. TN staging was performed using CT for lesions before and after neoadjuvant treatment by two radiologists,and the tumor regression grade (TRG) and pathological TRG were also assessed...
February 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28270289/comparison-of-topogram-based-automated-selection-of-tube-potential-and-fixed-tube-potential-in-imaging-solid-pancreatic-lesions
#14
Kai Xu, Liang Zhu, Huadan Xue, Ping Li, Zhaoyong Sun, Yao DU, Yun Wang, Zhengyu Jin
Objective To evaluate the image quality and radiation exposure in multidetector computed tomography (MDCT) with automated topogram-based tube potential selection,compared to fixed tube potential,in patients with solid pancreatic lesions. Methods The preoperative pancreatic dual-source CT images of 113 patients who were confirmed as solid pancreatic lesions by postoperative pathology in the Peking Union Medical College Hospital from January 2014 to August 2016 were retrospectively analyzed.Among them,53 patients were examined on fixed tube potential at 120 kV,and tube current was automatically modulated (group 1)...
February 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28267538/ultra-high-resolution-c-arm-ct-arthrography-of-the-wrist-radiation-dose-and-image-quality-compared-to-conventional-multidetector-computed-tomography
#15
Thomas Werncke, Lena Sonnow, Bernhard C Meyer, Matthias Lüpke, Jan Hinrichs, Frank K Wacker, Christian von Falck
OBJECTIVE: Objective of this phantom and cadaveric study was to compare the effective radiation dose (ED) and image quality (IQ) between C-arm computed tomography (CACT) using an ultra-high resolution 1×1 binning with a standard 16-slice CT (MDCT) arthrography of the wrist. METHODS: ED was determined with thermoluminescence dosimetry using an anthropomorphic phantom and different patient positions. Imaging was conducted in 10 human cadaveric wrists after tri-compartmental injection of diluted iodinated contrast material and a wire phantom...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28267533/neuroendocrine-liver-metastases-vascular-patterns-on-triple-phase-mdct-are-indicative-of-primary-tumour-location
#16
Maxime Ronot, Francesco Cuccioli, Marco Dioguardi Burgio, Marie-Pierre Vullierme, Olivia Hentic, Philippe Ruszniewski, Gaspard d'Assignies, Valérie Vilgrain
PURPOSE: To re-evaluate and compare CT features of neuroendocrine liver metastases (NLM) from pancreatic (p) and enteric (e) gastroenteropancreatic (GEP) tumours. MATERIAL AND METHODS: From 2006-2013, all patients with proven GEP-neuroendocrine tumours (NETs) with at least one NLM, no previous treatment were included. On unenhanced, arterial and portal phases, NLMs were characterized as hypo-, iso- or hyperattenuating in consensus by 2 radiologists blinded to clinical data...
April 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28267465/assessment-of-right-ventricular-function-in-acute-pulmonary-embolism
#17
Deisy Barrios, Raquel Morillo, José Luis Lobo, Rosa Nieto, Ana Jaureguizar, Ana K Portillo, Esther Barbero, Covadonga Fernandez-Golfin, Roger D Yusen, David Jiménez
The optimal approach to assess right ventricular (RV) function in patients with acute symptomatic pulmonary embolism (PE) lacks clarity. METHODS: This study aimed to evaluate the optimal approach to assess RV function in normotensive patients with acute symptomatic PE. Outcomes assessed through 30-days after the diagnosis of PE included all-cause mortality and complicated course. RESULTS: Eight hundred forty-eight patients were enrolled. Multidetector computed tomography (MDCT) and transthoracic echocardiography agreed on the presence or absence of RV overload in 449 (53%) patients...
March 2017: American Heart Journal
https://www.readbyqxmd.com/read/28267350/variation-in-ct-number-and-image-noise-uniformity-according-to-patient-positioning-in-mdct
#18
Timothy P Szczykutowicz, Andrew DuPlissis, Perry J Pickhardt
OBJECTIVE: Many algorithms for clinical decision making rely on assessment of the CT number (expressed as Hounsfield units); however, to our knowledge, few, if any, studies have addressed how CT numbers change as a function of patient positioning within the scanner. MATERIALS AND METHODS: An anthropomorphic phantom underwent imaging with varying amounts of vertical orientation misalignment with respect to isocenter. CT number and noise were measured using ROIs in the upper thorax, mid thorax, and abdomen...
March 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28266870/evaluation-of-different-low-dose-multidetector-ct-and-cone-beam-ct-protocols-in-maxillary-sinus-imaging-part-i-an-in-vitro-study
#19
Abeer A Almashraqi, Eman A Ahmed, Nashwa S Mohamed, Imad H Barngkgei, Nader A Elsherbini, Esam S Halboub
OBJECTIVES: This in-vitro study aimed at assessing radiation dose and image quality of different low-dose MDCT and CBCT imaging protocols in comparison to standard MDCT protocol for maxillary sinus imaging. METHODS: Effective dose (E) and image quality of 10 MDCT (changing effective milliampere (EmAs) starting from 141.3 to 20) and 3 CBCT protocols (changing mAs and voxel size (VS)) were assessed throughout scanning an anthropomorphic head and neck Alderson Rando phantom...
March 7, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/28265706/type-1-papillary-renal-cell-carcinoma-differentiation-from-type-2-papillary-rcc-on-multiphasic-mdct
#20
Jonathan R Young, Heidi Coy, Michael Douek, Pechin Lo, James Sayre, Allan J Pantuck, Steven S Raman
PURPOSE: To investigate whether multiphasic MDCT enhancement can help differentiate type 1 papillary renal cell carcinoma (RCC) from type 2 papillary RCC. METHODS: With IRB approval for this HIPAA-compliant retrospective study, we derived a cohort of 36 type 1 papillary RCCs and 33 type 2 papillary RCCs with preoperative multiphasic MDCT with up to four phases (unenhanced, corticomedullary, nephrographic, and excretory) from 2000 to 2013. Following segmentation, a computer-assisted detection (CAD) algorithm selected a 0...
March 7, 2017: Abdominal Radiology
keyword
keyword
66803
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"