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https://www.readbyqxmd.com/read/29033392/mechanical-recanalization-in-ischemic-anterior-circulation-stroke-within-an-8-hour-time-window-a-real-world-experience
#1
Dagmar Krajíčková, Antonín Krajina, Roman Herzig, Miroslav Lojík, Vendelín Chovanec, Jan Raupach, Eva Vítková, Jan Waishaupt, Oldřich Vyšata, Martin Vališ
PURPOSE: We aimed to assess the safety and effectiveness of mechanical recanalization in patients with ischemic stroke in the anterior circulation within 8 h since symptoms onset and with unknown onset time. We compared time intervals <6 h vs. 6-8 h/unknown onset time, as only limited data are available for a time window beyond 6 h. METHODS: Our cohort included 110 consecutive patients (44 males; mean age, 73.0±11.5 years) with ischemic stroke in the anterior circulation due to the acute occlusion of a large intracranial artery who underwent mechanical recanalization within an 8-hour time window or with unknown onset time...
October 16, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/28986556/clinical-implication-of-ectopic-liver-lipid-accumulation-in-renal-cell-carcinoma-patients-without-visceral-obesity
#2
Daisuke Watanabe, Akio Horiguchi, Shinsuke Tasaki, Kenji Kuroda, Akinori Sato, Junichi Asakuma, Keiichi Ito, Tomohiko Asano, Hiroshi Shinmoto
Fatty liver has emerged as a prognostic marker of cancer, so we investigated the impact of ectopic lipid accumulation in liver on the clinical outcome for patients with renal cell carcinoma (RCC). The records of 230 consecutive patients who had undergone surgery for RCC were reviewed, and liver lipid accumulation was estimated from the attenuation in unenhanced preoperative CT images. The median liver CT values of patients with G3 tumors was lower than that of patients with G1-2 tumors (P = 0.0116), that of patients with pT3-4 tumors was lower than that of patients with pT1-2 tumors (P = 0...
October 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28984778/diagnostic-value-of-using-multiplanar-reformation-images-case-report-for-rare-endotracheal-hamartomas
#3
Zhiming Xiang, Zhu Ai, Guimian Zhong, Yu Deng, Harshawn Malhi, Suzanne Palmer, Chishing Zee
RATIONALE: Pulmonary hamartomas are the most common benign tumor of the lung. Two types of pathologically similar hamartomas exist based on their location. These tumors have a low incidence, are rarely reported and frequently misdiagnosed because of lack of familiarity and/or understanding concerning their imaging features. PATIENT CONCERNS: Seventeen patients received treatment between June 2007 and May 2013 and had complete medical records. All of them had different degrees of cough and expectoration...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28969853/texture-analysis-of-ct-images-in-predicting-malignancy-risk-of-gastrointestinal-stromal-tumours
#4
S Liu, X Pan, R Liu, H Zheng, L Chen, W Guan, H Wang, Y Sun, L Tang, Y Guan, Y Ge, J He, Z Zhou
AIM: To explore the role of texture analysis of computed tomography (CT) images in predicting the malignancy risk of gastrointestinal stromal tumours (GISTs). MATERIALS AND METHODS: Seventy-eight patients with histopathologically confirmed GISTs underwent preoperative CT. Texture analysis was performed on unenhanced and contrast-enhanced CT images, respectively. Fourteen CT texture parameters were obtained and compared among GISTs at different malignancy risks with one-way analysis of variance or independent-samples Kruskal-Wallis test...
September 29, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28958720/dual-energy-ct-of-the-abdomen-and-pelvis-radiation-dose-considerations
#5
Joseph R Grajo, Dushyant V Sahani
Dual-energy CT offers several new applications and opportunities for routine clinical practice. Increasing utilization in the context of both routine practice and clinical research raises questions about expected radiation dose when compared with conventional single-energy exams. Despite initial concerns, advanced iterative reconstruction techniques and creation of virtual unenhanced images in multiphase acquisitions offer methods for dose reduction. Although dose varies across patients and scanners, modern dual-energy exams allow for comparable and potentially decreased radiation dose when compared with single-energy CT...
September 21, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28932702/emergency-ct-of-blunt-abdominal-trauma-experience-from-a-large-urban-hospital-in-southern-china
#6
REVIEW
Jingshan Gong, Dongdong Mei, Minjie Yang, Jianmin Xu, Yangyang Zhou
Trauma is one of the leading causes of death for men and women under the age of 45 years old, and abdominal injuries contribute to a large number of these deaths. Prompt diagnosis is very important for treatment decision making and can be life-saving. CT has become an essential imaging modality in emergency medicine. In this pictorial review, we present our experience of CT in blunt abdominal trauma and describe CT findings of common injuries, including hemoperitoneum, solid viscera, hollow viscera, mesenteric and diaphragmatic injuries...
August 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28915161/unenhanced-dual-energy-computed-tomography-visualization-of-brain-edema
#7
Mohammed F Mohammed, Olivia Marais, Adam Min, David Ferguson, Sabeena Jalakhan, Faisal Khosa, Michael OʼKeeffe, Tim OʼConnell, Heiko Schmiedeskamp, Bernhard Krauss, Axel Rohr, Savvas Nicolaou
PURPOSE: The aim of this study was to determine whether dual-energy computed tomography (DECT) imaging is superior to conventional noncontrast computed tomography (CT) imaging for the detection of acute ischemic stroke. MATERIALS AND METHODS: This was a retrospective, single-center study of 40 patients who presented to the emergency department (ED) of a major, acute care, teaching center with signs and symptoms of acute stroke. Only those patients who presented to the ED within 4 hours of symptom onset were included in this study...
September 14, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28886041/lower-limb-arterial-calcification-llac-scores-in-patients-with-symptomatic-peripheral-arterial-disease-are-associated-with-increased-cardiac-mortality-and-morbidity
#8
Mohammed M Chowdhury, Gregory C Makris, Jason M Tarkin, Francis R Joshi, Paul D Hayes, James H F Rudd, Patrick A Coughlin
AIMS: The association of coronary arterial calcification with cardiovascular morbidity and mortality is well-recognized. Lower limb arterial calcification (LLAC) is common in PAD but its impact on subsequent health is poorly described. We aimed to determine the association between a LLAC score and subsequent cardiovascular events in patients with symptomatic peripheral arterial disease (PAD). METHODS: LLAC scoring, and the established Bollinger score, were derived from a database of unenhanced CT scans, from patients presenting with symptomatic PAD...
2017: PloS One
https://www.readbyqxmd.com/read/28877612/the-role-of-mri-in-the-early-evaluation-of-lung-microwave-ablation
#9
Andrei Roman, Benjamin Kaltenbach, Tatjana Gruber-Rouh, Nagy N Naguib, Thomas J Vogl, Nour-Eldin A Nour-Eldin
PURPOSE: To retrospectively investigate the role of a contrast enhanced MRI (ceMRI) performed 24 hours after a microwave ablation (MWA) of the lung, in predicting local tumor progression (LTP) and detecting complications compared to an unenhanced CT Material and methods: Forty-nine patients that underwent MWA of 77 lung metastases between 2008 and 2015 were included. All patients received an unenhanced chest CT and a ceMRI (including T2 and ceT1) 24h after MWA. The conspicuities of the peripheral rim and of the ablated tumor were scored using 1-3 scales and compared between examinations...
September 6, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28867322/recurrent-bleeding-after-perimesencephalic-hemorrhage
#10
Frans Kauw, Birgitta K Velthuis, Ufuk Kizilates, Irene C van der Schaaf, Gabriel J E Rinkel, Mervyn D I Vergouwen
BACKGROUND: Perimesencephalic hemorrhage (PMH) is a type of subarachnoid hemorrhage with excellent long-term outcomes. Only 1 well-documented case of in-hospital rebleeding after PMH is described in the literature, which occurred after initiating antithrombotic treatment because of myocardial ischemia. We describe a patient with PMH without antithrombotic treatment who had 2 episodes of recurrent bleeding on the day of ictus. To validate the radiologic findings, we conducted a case-control study...
September 1, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28862728/value-of-triphasic-mdct-in-the-differentiation-of-small-renal-cell-carcinoma-and-oncocytoma
#11
Michele Scialpi, Eugenio Martorana, Valeria Rondoni, Ahmed Eissa, Ahmed El Sherbiny, Luigi Bevilacqua, Luis H Ros, Irene Escartín Martínez, Michele Milizia, Lucia Manganaro, Maria Antonietta Mazzei, Alfredo D'Andrea, Giampaolo Bianchi
INTRODUCTION: Although differentiation between benign and malignant small renal tumors (≤4 cm) is still difficult, it is a demand for decision making and determining the treatment strategy. Our aim is to evaluate the role of multidetector row computed tomography (MDCT) in the differentiation of small renal clear cell carcinoma (RCC) and renal oncocytoma (RO). METHODS: We reviewed triphasic computed tomographic (CT) scans performed in 43 patients diagnosed with RCC (n = 23) and RO (n = 21)...
August 11, 2017: Urologia
https://www.readbyqxmd.com/read/28861631/unenhanced-magnetic-resonance-imaging-immediately-after-radiofrequency-ablation-of-liver-malignancy-preliminary-results
#12
Mirko D'Onofrio, Nicolò Cardobi, Andrea Ruzzenente, Simone Conci, Valentina Ciaravino, Alfredo Guglielmi, Roberto Pozzi Mucelli
PURPOSE: To assess the accuracy of unenhanced magnetic resonance imaging (MRI) immediately after the percutaneous ultrasound-guided radiofrequency ablation (RFA) of liver malignancy in predicting treatment efficacy at CT follow-up. MATERIALS AND METHODS: Percutaneous ablation was prospectively performed in 23 liver malignancies (20 hepatocarcinomas and 3 metastases). After the procedure in the same day all patients were studied with unenhanced MRI. The best sequence to detect the coagulative necrosis was visually established...
August 31, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28858562/evaluation-of-kidney-stones-with-reduced-radiation-dose-ct-progress-from-2011-2012-to-2015-2016-not-there-yet
#13
Karrin Weisenthal, Priyadarshini Karthik, Melissa Shaw, Debapriya Sengupta, Mythreyi Bhargavan-Chatfield, Judy Burleson, Adel Mustafa, Mannudeep Kalra, Christopher Moore
Purpose To determine if the use of reduced-dose computed tomography (CT) for evaluation of kidney stones increased in 2015-2016 compared with that in 2011-2012, to determine variability in radiation exposure according to facility for this indication, and to establish a current average radiation dose for CT evaluation for kidney stones by querying a national dose registry. Materials and Methods This cross-sectional study was exempt from institutional review board approval. Data were obtained from the American College of Radiology dose registry for CT examinations submitted from July 2015 to June 2016...
August 31, 2017: Radiology
https://www.readbyqxmd.com/read/28833626/cardiac-imaging-to-detect-coronary-artery-disease-in-athletes-aged-35-years-and-older-a-scoping-review
#14
Thijs L Braber, Johannes B Reitsma, Arend Mosterd, Martin J Willemink, Niek H J Prakken, Martin Halle, Sanjay Sharma, Birgitta K Velthuis
Sudden cardiac death (SCD) is a devastating event in athletes. Screening efforts that were first directed at athletes younger than 35 years, are now focusing on the rapidly growing group of older sportspersons. Athletes aged ≥35 years have a 10-fold increased risk of exercise-related cardiac arrest, mostly due to coronary artery disease (CAD). Although cardiac imaging is pivotal in identifying CAD, the role of imaging modalities in screening asymptomatic older sportspersons remains unclear. We performed a scoping review to identify the role of cardiac imaging to detect CAD in older sportspersons and to identify gaps in the existing literature...
August 23, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28829166/hyperattenuating-sign-an-important-finding-to-diagnose-pulmonary-embolism-at-unenhanced-chest-ct
#15
COMMENT
Pedro Paulo Teixeira E Silva Torres, Alexandre Dias Mançano, Edson Marchiori
No abstract text is available yet for this article.
September 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28828518/favorable-outcome-of-conservative-management-of-extensive-bladder-ischemia-complicating-prostatic-artery-embolization
#16
Hippocrates Moschouris, Konstantinos Stamatiou, Ioannis Kornezos, Victoria Kartsouni, Katerina Malagari
This is a report of a case of bladder ischemia which complicated bilateral prostatic artery embolization in an 80-year-old man with benign prostate hyperplasia and indwelling bladder catheter. Reflux of 100 μm microspheres into superior vesical arteries was the most likely cause. An unenhanced computed tomography (CT) scan performed immediately post-embolization showed retention of contrast in the left anterolateral bladder wall. Five days later, CT showed gas collections and dehiscence of the bladder wall at the same site, involving an area of 47 × 42 mm...
August 21, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28815667/diagnostic-performance-of-unenhanced-computed-tomography-and-18-f-fluorodeoxyglucose-positron-emission-tomography-in-indeterminate-adrenal-tumours
#17
Danae A Delivanis, Irina Bancos, Thomas D Atwell, Grant D Schmit, Patrick W Eiken, Neena Natt, Dana Erickson, Spyridoula Maraka, William F Young, Mark A Nathan
OBJECTIVE: Evidence on the diagnostic performance of adrenal imaging is limited. We aimed to assess the diagnostic performance of unenhanced computed tomography (CT) and (18) F-fluorodeoxyglucose ((18) FDG) positron emission tomography (PET)/CT imaging in a high-risk population for adrenal malignancy using an optimal reference standard. DESIGN: Retrospective cohort study. METHODS: Imaging studies of patients with adrenal nodules who underwent adrenal biopsy and/or adrenalectomy between 1994 and 2014 were reviewed and compared to the reference standard of histology...
August 17, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28813194/characterization-of-small-4-cm-focal-renal-lesions-diagnostic-accuracy-of-spectral-analysis-using-single-phase-contrast-enhanced-dual-energy-ct
#18
Bhavik N Patel, Alex Bibbey, Kingshuk R Choudhury, Richard A Leder, Rendon C Nelson, Daniele Marin
OBJECTIVE: The purpose of this study is to determine whether single-phase contrast-enhanced dual-energy quantitative spectral analysis improves the accuracy of diagnosis of small (< 4.0 cm) renal lesions, compared with conventional single-energy attenuation measurements. MATERIALS AND METHODS: In this retrospective study, 136 consecutive patients (95 men and 41 women; mean age, 54 years) with 144 renal lesions (111 benign and 33 malignant) underwent single-energy unenhanced and dual-energy contrast-enhanced CT of the abdomen...
October 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28811930/improved-ct-detection-of-acute-bowel-ischemia-using-frequency-selective-non-linear-image-blending
#19
Sven Schneeweiss, Michael Esser, Wolfgang Thaiss, Hans Boesmueller, Hendrik Ditt, Konstantin Nikolau, Marius Horger
BACKGROUND: Computed tomography (CT) as a fast and reliable diagnostic technique is the imaging modality of choice for acute bowel ischemia. However, diagnostic is often difficult mainly due to low attenuation differences between ischemic and perfused segments. PURPOSE: To compare the diagnostic efficacy of a new post-processing tool based on frequency selective non-linear blending with that of conventional linear contrast-enhanced CT (CECT) image blending for the detection of bowel ischemia...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28796552/diagnostic-accuracy-of-mri-versus-ct-for-the-evaluation-of-acute-appendicitis-in-children-and-young-adults
#20
COMPARATIVE STUDY
Sonja Kinner, Perry J Pickhardt, Erica L Riedesel, Kara G Gill, Jessica B Robbins, Douglas R Kitchin, Timothy J Ziemlewicz, John B Harringa, Scott B Reeder, Michael D Repplinger
OBJECTIVE: Appendicitis is frequently diagnosed in the emergency department, most commonly using CT. The purpose of this study was to compare the diagnostic accuracy of contrast-enhanced MRI with that of contrast-enhanced CT for the diagnosis of appendicitis in adolescents when interpreted by abdominal radiologists and pediatric radiologists. SUBJECTS AND METHODS: Our study included a prospectively enrolled cohort of 48 patients (12-20 years old) with nontraumatic abdominal pain who underwent CT and MRI...
October 2017: AJR. American Journal of Roentgenology
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