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Asma'a A Al-Ekrish, Sara A Alfadda, Wadea Ameen, Romed Hörmann, Wolfgang Puelacher, Gerlig Widmann
PURPOSE: To compare the surface of computer-aided design (CAD) models of the maxilla produced using ultra-low MDCT doses combined with filtered backprojection (FBP), adaptive statistical iterative reconstruction (ASIR) and model-based iterative reconstruction (MBIR) reconstruction techniques with that produced from a standard dose/FBP protocol. METHODS: A cadaveric completely edentulous maxilla was imaged using a standard dose protocol (CTDIvol: 29.4 mGy) and FBP, in addition to 5 low dose test protocols (LD1-5) (CTDIvol: 4...
June 16, 2018: International Journal of Computer Assisted Radiology and Surgery
Anita Gohel, Masafumi Oda, Amol S Katkar, Osamu Sakai
Multidetector row CT (MDCT) offers superior soft tissue characterization and is useful for diagnosis of odontogenic and nonodontogenic cysts and tumors, fibro-osseous lesions, inflammatory, malignancy, metastatic lesions, developmental abnormalities, and maxillofacial trauma. The rapid advances in MDCT technology, including perfusion CT, dual-energy CT, and texture analysis, will be an integrated anatomic and functional high-resolution scan, which will help in diagnosis of maxillofacial lesions and overall patient care...
July 2018: Dental Clinics of North America
Xiongbiao Chen, Pihua Fang, Zheng Liu, Jia He, Min Tang, Jun Liu, Bin Lu, Shu Zhang
BACKGROUND: The influence of pulmonary vein (PV) anatomy on cryo kinetics during cryoballoon (CB) ablation is unclear. OBJECTIVE: To investigate the relationship between PV anatomy and cryo kinetics during CB ablation for atrial fibrillation (AF). METHODS: Sixty consecutive patients were enrolled. PV anatomy, including ostial diameters (long, short and corrected), ratio between short and long diameters, ostium shape (round, oval, triangular, and narrow), and drainage pattern (typical, with common trunk, common antrum, ostial branch and supernumerary PV) were evaluated on multi-detector computed tomography (MDCT) images pre-procedure...
May 2018: Arquivos Brasileiros de Cardiologia
C De Biase, A Mastrokostopoulos, R Philippart, L M Desroche, S Blanco, K Rehal, N Dumonteil, D Tchetche
PURPOSE: Aortic stenosis (AS) in bicuspid aortic valve (BAV) remains a challenge for transcatheter aortic valve implantation (TAVI). BAV is a condition encountered in young adults as well as elderly patients. Frequently we face in clinical practice elderly patients with BAV and severe AS, but there is little evidence concerning TAVI in this population. The aim of our study was to compare anatomic features and outcomes of bicuspid and tricuspid patients with AS undergoing TAVI. METHODS: 83 consecutive BAV patients undergoing TAVI were matched, in a 1:2 ratio, to 166 tricuspid patients...
September 1, 2018: International Journal of Cardiology
Takao Kaneko, Norihiko Kono, Yuta Mochizuki, Hiroyasu Ikegami, Yoshiro Musha
Background: Although many studies have evaluated the success of porous tantalum component in primary and revision cementless total knee arthroplasty (TKA) cases, few studies have reported the breakage of porous tantalum monoblock patella component (PTMP). The purpose of this study was to investigate the radiographic outcomes of breakage of PTMP at short-term follow up. Methods: This was a retrospective study of 49 consecutive knees in 43 patients who underwent TKA surgery between September 2012 and March 2014...
June 2018: Journal of Orthopaedics
Hyun Oh Park, Joung Hun Byun, Seong Ho Moon, Jong Woo Kim, Sung Hwan Kim, Ki Nyun Kim, Jae Jun Jung, Dong Hoon Kang, Jun Young Choi, Jun Ho Yang, In Seok Jang, Chung Eun Lee
BACKGROUND: The pseudoaneurysms of sinus of Valsalva is an uncommon and serious complication of an infection, trauma, or after cardiac surgery or procedure. Pseudoaneurysms of sinus of Valsalva from left is rare. We describe a case of pseudoaneurysm of the left coronary sinus of Valsalva invaded into the left ventricle (LV) diagnosed by transthoracic echocardiography (TTE), transesophageal ecoccardiography (TEE), and multiple detector computed tomography (MDCT). CASE PRESENTATION: A 44-year-old male patient had New York Heart Association (NYHA) class II / III dyspnea during 4 months...
June 7, 2018: Journal of Cardiothoracic Surgery
Yoko Ueda, Yuhei Shiga, Yoshiaki Idemoto, Kohei Tashiro, Kota Motozato, Rie Koyoshi, Takashi Kuwano, Kanta Fujimi, Masahiro Ogawa, Keijiro Saku, Shin-Ichiro Miura
The associations between the presence or severity of coronary artery disease (CAD) and measurements of various kinds of fat as assessed by multidetector row computed tomography (MDCT) are unclear. We enrolled 300 patients who were clinically suspected to have CAD or who had at least one cardiac risk factor and had undergone MDCT. The number of significantly stenosed coronary vessels (VD), and measurements of pericardial fat index, paracardial fat index, epicardial fat index, visceral fat index, and subcutaneous fat index were quantified using MDCT...
June 6, 2018: International Heart Journal
Stefan Kopf, Jan B Groener, Zoltan Kender, Thomas Fleming, Maik Brune, Christin Riedinger, Nadine Volk, Esther Herpel, Dominik Pesta, Julia Szendrödi, Mark O Wielpütz, Hans-Ulrich Kauczor, Hugo A Katus, Michael Kreuter, Peter P Nawroth
BACKGROUND: Diabetes mellitus is a significant comorbidity of interstitial lung disease (ILD). OBJECTIVES: The aim of this study was to investigate the incidence of restrictive lung disease (RLD) and ILD in patients with prediabetes and type 2 diabetes (T2D). METHODS: Forty-eight nondiabetics, 68 patients with prediabetes, 29 newly diagnosed T2D, and 110 patients with long-term T2D were examined for metabolic control, diabetes-related complications, breathlessness, and lung function...
June 6, 2018: Respiration; International Review of Thoracic Diseases
Gunjan Jindal, Samita Singal, Birinder Nagi, Amit Mittal, Shallini Mittal, Rikki Singal
Objectives: Clinically or sonographically suspected gallbladder carcinoma was evaluated on multidetector computed tomography. Based on the spectrum of multidetector computed tomography findings, staging of gallbladder carcinoma was done. Multidetector computed tomography diagnosis was compared with pathological diagnosis. Material and methods: This is a prospective study carried out in 100 patients at a rural Indian center between May 2012 and June 2015. Multidetector computed tomography was performed in all the cases and the findings were observed...
March 2018: Mædica
Shaojie Tang, Kuidong Huang, Yunyong Cheng, Xuanqin Mou, Xiangyang Tang
In computed tomography (CT), the polychromatic characteristics of x-ray photons, which are emitted from a source, interact with materials and are absorbed by a detector, may lead to beam-hardening effect in signal detection and image formation, especially in situations where materials of high attenuation (e.g., the bone or metal implants) are in the x-ray beam. Usually, a beam-hardening correction (BHC) method is used to suppress the artifacts induced by bone or other objects of high attenuation, in which a calibration-oriented iterative operation is carried out to determine a set of parameters for all situations...
June 4, 2018: Physics in Medicine and Biology
Muhammad Awais, Abdul Rehman, Noor U Baloch
Acute abdomen is a common presentation in the emergency department and radiologic imaging plays a pivotal role in the evaluation of such patients. Multi-detector computed tomography (MDCT) is the most commonly utilized radiologic investigation in such patients as it can be performed fairly rapidly and has excellent accuracy for diagnosing various causes of an acute abdomen. Additionally, MDCT may also reveal clues towards an alternative diagnosis that was not even suspected on the basis of a history and physical examination...
March 29, 2018: Curēus
Runhua Feng, Sheng Lu, Birendra K Sah, Maneesh K Beeharry, Huan Zhang, Min Yan, Bingya Liu, Chen Li, Zhenggang Zhu
BACKGROUND: Predicting lymph node metastasis (LNM) accurately is vital to design optimal treatment strategies preoperatively for gastric cancer (GC) patients. However, conventional tumor biomarkers and imaging techniques are not sufficient to predict LNM before surgery. miR-126 has been reported to play important roles in tumor metastasis which may represent a novel tumor biomarker. OBJECTIVE: To assess the utility of the combination of serum miR-126 and multi-detector computed tomography (MDCT) in predicting LNM preoperatively in GC...
May 11, 2018: Cancer Biomarkers: Section A of Disease Markers
Kageyuki Oba, Minetaka Maeda, Gulinu Maimaituxun, Satoshi Yamaguchi, Osamu Arasaki, Daiju Fukuda, Shusuke Yagi, Yukina Hirata, Susumu Nishio, Takashi Iwase, Shoichiro Takao, Kenya Kusunose, Hirotsugu Yamada, Takeshi Soeki, Tetsuzo Wakatsuki, Masafumi Harada, Hiroaki Masuzaki, Masataka Sata, Michio Shimabukuro
BACKGROUND: Although increasing evidence suggests that epicardial adipose tissue volume (EATV) is associated with atrial fibrillation (AF), it is controversial whether there is a dose-response relationship of increasing EATV along the continuum of AF. We evaluated the effect of the EATV on the prevalence of paroxysmal AF (PAF) and persistent AF (PeAF) and the relationships with cardiac structure and functional remodeling.Methods and Results:Subjects who underwent multidetector computed tomography (MDCT) coronary angiography because of symptoms suggestive of coronary artery disease were divided into sinus rhythm (SR) (n=112), PAF (n=133), and PeAF (n=71) groups...
May 25, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
Manabu Kaneko, Hiroaki Nozawa, Yosuke Tsuji, Shigenobu Emoto, Koji Murono, Takeshi Nishikawa, Kazuhito Sasaki, Kensuke Otani, Toshiaki Tanaka, Keisuke Hata, Kazushige Kawai, Kazuhiko Koike
A Dieulafoy lesion of the rectum is a very rare entity that can cause massive lower gastrointestinal (GI) hemorrhage. Identifying the bleeding point is sometimes difficult because these lesions are very small. We herein describe an 82-year-old man with active hemorrhage due to a rectal Dieulafoy lesion. He was referred to our hospital because of persistent hematochezia from the morning of that day. He had a history of atrial fibrillation, chronic heart failure, diabetes mellitus, and hyperuricemia. Prompt multidetector-row computed tomography (MDCT) enabled us to detect active bleeding from the lower rectum...
January 2018: Case Reports in Gastroenterology
Andrew T Scrima, Meghan G Lubner, E Jason Abel, Thomas C Havighurst, Daniel D Shapiro, Wei Huang, Perry J Pickhardt
PURPOSE: To assess CT texture features of small renal cell carcinomas (≤ 4cm) for association with key pathologic features including protein biomarkers. METHODS: Quantitative CT texture analysis (CTTA) of small renal cancers (≤ 4cm) was performed on non-contrast and portal venous phase abdominal MDCT scans with an ROI drawn at the largest cross-sectional diameter of the tumor using commercially available software. Texture parameters including mean pixel attenuation, the standard deviation (SD) of the pixel distribution histogram, entropy, the mean of positive pixels, the skewness (i...
May 26, 2018: Abdominal Radiology
Y Yang, Y H Liu, Q Cheng, Z Cheng, S H Wu, D Ding, S C Xu
Objective: To explore the clinical value of MDCT and post-processing in children with suspected foreign body in trachea. Method: Two hundred patients with suspected tracheal foreign body were treated with 64-slice spiral CT (MDCT) and simulated endoscopic imaging,then compared with seen in bronchoscopy; Compare the results of MDCT and post-processing with the coincidence of intraoperative findings. Result: One hundred and eighty-four cases of positive children were examined by MDCT postprocessing technique and bronchoscopy,179 cases were obstructed by exogenous foreign body,5 cases were phlegm thrombosis (endogenous foreign body) obstruction; 16 cases of children with no foreign body diagnosed by MDCT post-processing technique were also examined by bronchoscopy...
October 5, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
Dinesh Manoharan, Sanjay Sharma, Chandan J Das, Rajeev Kumar, Geetika Singh, Pratik Kumar
OBJECTIVE: The primary objective of this study was to compare triple-bolus dual-energy CT (DECT) against standard triple-phase MDCT in terms of appropriateness of patient treatment. SUBJECTS AND METHODS: One hundred twenty-four patients with suspected renal masses seen at ultrasound were randomized into triple-bolus DECT and triple-phase MDCT groups. Patients in the triple-bolus DECT group underwent synchronous corticomedullary nephrographic delayed-phase triple-bolus DECT...
May 24, 2018: AJR. American Journal of Roentgenology
Asma'a Abdulrahman Al-Ekrish, Wafa Alfaleh, Romed Hörmann, Ameera Alabdulwahid, Wolfgang Puelacher, Gerlig Widmann
OBJECTIVES: To compare subjective and objective localization of the inferior alveolar canal (IAC) on multidetector computed tomography (MDCT) images obtained by ultralow doses in combination with the reconstruction techniques of filtered backprojection (FBP), Adaptive Statistical Iterative Reconstruction (ASIR), or Model Based Iterative Reconstruction (MBIR) as compared to standard dose MDCT and FBP. METHODS: Three cadavers were imaged with a reference standard dose MDCT examination (CTDIvol: 29...
May 23, 2018: Dento Maxillo Facial Radiology
Shaojie Tang, Kuidong Huang, Yunyong Cheng, Tianye Niu, Xiangyang Tang
GOALS: With substantially increased number of detector rows in multidetector CT (MDCT), axial scan with projection data acquired along a circular source trajectory has become the method-of-choice in increasing clinical applications. Recognizing the practical relevance of image reconstruction directly from the projection data acquired in the native cone beam (CB) geometry, especially in scenarios wherein the most achievable in-plane resolution is desirable, we present a three-dimensional (3-D) weighted CB-FBP algorithm in such geometry in this paper...
June 2018: IEEE Transactions on Bio-medical Engineering
Ulrika Asenbaum, Klaus Kaczirek, Ahmed Ba-Ssalamah, Helmut Ringl, Christoph Schwarz, Fredrik Waneck, Fabian Fitschek, Christian Loewe, Richard Nolz
OBJECTIVES: To compare the value of functional future liver remnant (functFLR) to established clinical and imaging variables in prediction of post-hepatectomy liver failure (PHLF) after major liver resection. METHODS: This retrospective, cross-sectional study included 62 patients, who underwent gadoxetic acid enhanced MRI and MDCT within 10 weeks prior to resection of ≥ 4 liver segments. Future liver remnant (FLR) was measured in MDCT using semi-automatic software...
May 16, 2018: European Radiology
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