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https://www.readbyqxmd.com/read/29785839/optimization-of-a-secondary-voi-protocol-for-lung-imaging-in-a-clinical-ct-scanner
#1
Thomas C Larsen, Vissagan Gopalakrishnan, Jianhua Yao, Catherine P Nguyen, Marcus Y Chen, Joel Moss, Han Wen
We present a solution to meet an unmet clinical need of an in-situ "close look" at a pulmonary nodule or at the margins of a pulmonary cyst revealed by a primary (screening) chest CT while the patient is still in the scanner. We first evaluated options available on current whole-body CT scanners for high resolution screening scans, including ROI reconstruction of the primary scan data and HRCT, but found them to have insufficient SNR in lung tissue or discontinuous slice coverage. Within the capabilities of current clinical CT systems, we opted for the solution of a secondary, volume-of-interest (VOI) protocol where the radiation dose is focused into a short-beam axial scan at the z position of interest, combined with a small-FOV reconstruction at the xy position of interest...
May 21, 2018: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29783140/congenital-diaphragmatic-disease-an-unusual-presentation-in-adulthood-case-report
#2
Angela Gurrado, Roberta Maria Isernia, Alessandro De Luca, Valentina Ferraro, Daniela Virgintino, Anna Napoli, Giuseppe Cavallaro, Eugenio Maiorano, Angela Pezzolla, Mario Testini
INTRODUCTION: Congenital diaphragmatic disease is a quite common condition that usually occurs in the neonatal period, and the diagnosis of congenital diaphragmatic disease in adulthood is rare. CASE PRESENTATION: A 64-years-old Caucasian woman was admitted in emergency at our Department, due to a bowel obstruction and dyspnea. A CT-scan showed a diaphragmatic herniation in the left area, with malposition of dilated transverse and descending colon in the chest. An emergency laparatomy was performed, showing a toxic megacolon, in the absence of a true diaphragmatic hernia, and a left diaphragm and left liver hypoplasia...
May 7, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29780633/deep-learning-aided-decision-support-for-pulmonary-nodules-diagnosing-a-review
#3
REVIEW
Yixin Yang, Xiaoyi Feng, Wenhao Chi, Zhengyang Li, Wenzhe Duan, Haiping Liu, Wenhua Liang, Wei Wang, Ping Chen, Jianxing He, Bo Liu
Deep learning techniques have recently emerged as promising decision supporting approaches to automatically analyze medical images for different clinical diagnosing purposes. Diagnosing of pulmonary nodules by using computer-assisted diagnosing has received considerable theoretical, computational, and empirical research work, and considerable methods have been developed for detection and classification of pulmonary nodules on different formats of images including chest radiographs, computed tomography (CT), and positron emission tomography in the past five decades...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29779892/-cardiac-compression-of-hydatid-origin
#4
I Bouassida, C Pricopi, G Mangiameli, A Arame, J B Auliac, B Gorbatai, M Riquet, F Le Pimpec Barthes
INTRODUCTION: Cardiac hydatid disease is uncommon and occurs in 0.5 to 2% of patients with hydatidosis. Isolated intrapericardial hydatid cystic disease is extremely rare. OBSERVATION: We report the case of a young woman with cardiac compression due to multiple primary intrapericardial hydatid cysts. Since 1 year, she had gradual general health deterioration including dyspnoea, sweats and weight loss of 8kg. A widening of the mediastinum was observed on chest X-ray...
May 17, 2018: Revue de Pneumologie Clinique
https://www.readbyqxmd.com/read/29777062/brock-malignancy-risk-calculator-for-pulmonary-nodules-validation-outside-a-lung-cancer-screening-population
#5
Kaman Chung, Onno M Mets, Paul K Gerke, Colin Jacobs, Annemarie M den Harder, Ernst T Scholten, Mathias Prokop, Pim A de Jong, Bram van Ginneken, Cornelia M Schaefer-Prokop
OBJECTIVE: To assess the performance of the Brock malignancy risk model for pulmonary nodules detected in routine clinical setting. METHODS: In two academic centres in the Netherlands, we established a list of patients aged ≥40 years who received a chest CT scan between 2004 and 2012, resulting in 16 850 and 23 454 eligible subjects. Subsequent diagnosis of lung cancer until the end of 2014 was established through linking with the National Cancer Registry...
May 18, 2018: Thorax
https://www.readbyqxmd.com/read/29776942/postpartum-pneumomediastinum-and-subcutaneous-emphysema
#6
Diaeddin Sagar, Trevor K Rogers, Aldrin Adeni
We present the case of a 22-year-old primigravida with symptoms of neck swelling and difficulty breathing 3 hours after uneventful vaginal delivery. On examination, there was surgical emphysema. A CT scan confirmed air in the subcutaneous tissues and also revealed pneumomediastinum. There was no evidence of pneumothorax and gastro-oesophageal endoscopy showed no signs of oesophageal rupture. The patient remained clinically stable throughout her admission and was discharged home after 48 hours of observation...
May 18, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29775663/free-breathing-ultrashort-echo-time-lung-magnetic-resonance-imaging-using-stack-of-spirals-acquisition-a-feasibility-study-in-oncology-patients
#7
Min Jae Cha, Hyun Jeong Park, Mun Young Paek, Alto Stemmer, Eun Sun Lee, Sung Bin Park, Yang Soo Kim
OBJECTIVES: To investigate the diagnostic accuracy of lung magnetic resonance imaging (MRI) with a free-breathing three-dimensional ultrashort echo time spoiled gradient echo sequence using a stack-of-spirals acquisition (spiral 3D UTE) for pulmonary nodule detection at 3 T in oncology patients. METHODS: The institutional review board approved this retrospective study. Between June and September of 2017, 32 oncology patients underwent both free-breathing spiral 3D UTE of the lungs and thin-section chest computed tomography (CT) for pulmonary metastasis workups...
May 15, 2018: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29774196/common-carotid-artery-dissection-in-multiple-extracranial-injury-a-case-report
#8
Jin Sang Kil, Mi Kyung Lee, Ki Seong Eom
Traumatic common carotid artery dissection (CCAD) is rare. To our knowledge, only 14 case reports have described traumatic CCAD previously. Here, we report a case of CCAD in a patient with severe trauma. A 50-year-old man was lying on the road after drinking alcohol when a car drove over him. Computed tomography (CT) revealed multiple rib fractures with hemopneumothorax, lung contusion, flail chest, large amount of hematoma with bladder rupture, and fractures on the C6 spinous process, sacral ala, iliac bone, and pubic ramus...
April 2018: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/29769481/a-case-of-thoracic-endometriosis-syndrome-presenting-with-recurrent-catamenial-pneumothorax
#9
Shoaib Z Junejo, Sandeep Singh Lubana, Sukhdip Singh Shina, Sandeep Singh Tuli
BACKGROUND Catamenial pneumothorax (CP) is a spontaneous pneumothorax commonly associated with menstrual periods. Endometrial tissues most commonly involve the pelvic region. However, after the pelvis, the lungs are most frequently involved. Thoracic endometriosis should always be suspected in young women presenting with CP. CASE REPORT A 30-year-old woman with history of endometriosis presented with chief complaint of umbilical pain. A computerized tomography (CT) scan of the abdomen and pelvis was performed, which showed an incidental finding of a large right-sided pneumothorax...
May 17, 2018: American Journal of Case Reports
https://www.readbyqxmd.com/read/29764746/appropriateness-and-clinical-outcome-of-chest-computed-tomography-without-intravenous-contrast-a-study-conducted-in-pakistan
#10
Amjad Sattar, Sohail Ahmed Khan, Nauman Al-Qamari, Hatem Adel, Syed Omair Adil, Kashif Shafique
BACKGROUND: Chest computed tomography (CT), including high-resolution CT (HRCT), has become an integral part of modern healthcare. It enables the physician to arrive at a diagnosis using a noninvasive approach. Our practice has shown that various chest CT scans without intravenous (IV) contrast, including HRCT, have no proper clinical indication. For the same reason, we have assessed the appropriateness of chest CT without IV contrast based on the evidence-based American College of Radiology (ACR) appropriateness criteria...
March 28, 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29762259/precise-and-automatic-patient-positioning-in-computed-tomography-avatar-modeling-of-the-patient-surface-using-a-3-dimensional-camera
#11
Natalia Saltybaeva, Bernhard Schmidt, Andreas Wimmer, Thomas Flohr, Hatem Alkadhi
OBJECTIVES: The aim of this study was to evaluate the accuracy of a 3-dimensional (3D) camera algorithm for automatic and individualized patient positioning based on body surface detection and to compare the results of the 3D camera with manual positioning performed by technologists in routinely obtained chest and abdomen computed tomography (CT) examinations. MATERIALS AND METHODS: This study included data of 120 patients undergoing clinically indicated chest (n = 68) and abdomen (n = 52) CT...
May 14, 2018: Investigative Radiology
https://www.readbyqxmd.com/read/29762055/evaluating-the-effect-of-increased-pitch-iterative-reconstruction-and-dual-source-ct-on-dose-reduction-and-image-quality
#12
Joanna Gariani, Steve P Martin, Diomidis Botsikas, Christoph D Becker, Xavier Montet
OBJECTIVE: to compare radiation dose and image quality of thoraco-abdominal scans obtained with a high-pitch protocol (pitch 3.2) and iterative reconstruction (SAFIRE) in comparison to standard pitch reconstructed with FBP using dual-source CT. METHODS: 114 CT scans (Somatom Definition Flash, Siemens), 39 thoracic scans, 54 thoraco-abdominal scans and 21 abdominal scans were performed. Analysis of three protocols was undertaken; pitch of 1 reconstructed with FBP, pitch of 3...
May 15, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29761316/impact-of-visual-feedback-on-dose-volume-histograms-for-organs-at-risk-in-postoperative-radiotherapy-with-deep-inspiration-breath-holding-for-patients-treated-with-breast-conserving-therapy-a-planning-study
#13
Keiko Nemoto Murofushi, Masaru Nakajima, Tetsuya Tomita, Minako Sumi, Yasuo Yoshioka, Masahiko Oguchi, Hideyuki Sakurai
BACKGROUND: We evaluated the effectiveness of visual feedback (VF) on radiotherapy with deep inspiration breath-holding (DIBH), and reviewed the dose for organs at risk (OARs). METHODS: Respiratory motions during DIBH for 15 s were monitored during planning computed tomography (CT)-scanning and simulation for 40 patients after breast-conserving surgery from June 2007 to February 2008. For 22 of 40 patients, a goggle-type liquid crystal display monitor was used for VF...
May 14, 2018: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/29758455/deep-neural-networks-for-automatic-detection-of-osteoporotic-vertebral-fractures-on-ct-scans
#14
Naofumi Tomita, Yvonne Y Cheung, Saeed Hassanpour
Osteoporotic vertebral fractures (OVFs) are prevalent in older adults and are associated with substantial personal suffering and socio-economic burden. Early diagnosis and treatment of OVFs are critical to prevent further fractures and morbidity. However, OVFs are often under-diagnosed and under-reported in computed tomography (CT) exams as they can be asymptomatic at an early stage. In this paper, we present and evaluate an automatic system that can detect incidental OVFs in chest, abdomen, and pelvis CT examinations at the level of practicing radiologists...
May 8, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29750180/reporting-of-coronary-artery-calcification-on-chest-ct-studies-in-breast-cancer-patients-at-high-risk-of-cancer-therapy-related-cardiac-events
#15
William J Phillips, Christopher Johnson, Angeline Law, Michele Turek, Alex R Small, Joao R Inacio, Susan Dent, Terrence Ruddy, Rob S Beanlands, Benjamin J W Chow, Gary R Small
Background: The identification of coronary artery calcification (CAC) detected coincidentally on chest CT exams could assist in cardiovascular risk assessment but may not be reported consistently on clinical studies. Cardiovascular risk factor stratification is important to predict short term cardiac events during cancer therapy and long term cardiac event free survival in cancer patients. We sought to determine the prevalence of CAC and clinical reporting rates in a cohort of cancer patients at high risk of cancer therapy related cardiac events...
March 2018: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/29750136/dysfunctional-closed-chest-drainage-common-causative-factors-and-recommendations-for-prevention
#16
Usman Hashmi, Muhammad Nadeem, Abdul Aleem, Fuad Ul Hasan H Khan, Rabeea Gull, Kaleen Ullah, Iftikhar H Khan
Introduction Dysfunctional closed chest drainage unit (CDU) dysfunction is a common but serious clinical problem associated with tube thoracostomy and results in a significant rise in morbidity, prolonged hospital stays, and increased economic burden. This observational study examines the proximate factors of closed CDU dysfunction in addition to their relative frequency. Based on our findings, we suggest logical recommendations for preventing the factors that contribute to closed chest drainage unit dysfunction...
March 9, 2018: Curēus
https://www.readbyqxmd.com/read/29746705/a-new-method-for-ct-dose-estimation-by-determining-patient-water-equivalent-diameter-from-localizer-radiographs-geometric-transformation-and-calibration-methods-using-readily-available-phantoms
#17
Da Zhang, Georgeta Mihai, Larry G Barbaras, Olga R Brook, Matthew R Palmer
PURPOSE: Water equivalent diameter (Dw) reflects patient's attenuation and is a sound descriptor of patient size, and is used to determine size specific dose estimator from a CT exam. Calculating Dw from CT localizer radiographs makes it possible to utilize Dw before actual scans, and minimizes truncation errors due to limited to utilize Dw before actual scans, and minimizes truncation errors due to limited reconstructed fields of view. One obstacle preventing the user community from implementing this useful tool is the necessity to calibrate localizer pixel values so as to represent water equivalent attenuation...
May 10, 2018: Medical Physics
https://www.readbyqxmd.com/read/29742701/early-tumor-shrinkage-served-as-a-prognostic-factor-for-patients-with-stage-iii-non-small-cell-lung-cancer-treated-with-concurrent-chemoradiotherapy
#18
Min Wei, Qingqing Ye, Xuan Wang, Men Wang, Yan Hu, Yonghua Yang, Jiyuan Yang, Jun Cai
BACKGROUND: Lung cancer is the most common cause of cancer death. About 80% of patients are diagnosed at stage III in the non-small cell lung cancer (NSCLC). It is extremely important to understand the progression of this disease which has low survival times despite the advancing treatment modalities. We aimed to investigate the relationship between early tumor shrinkage (ETS) after initial concurrent chemoradiotherapy (C-CRT) and survival outcome in patients with stage III (NSCLC). METHODS: A retrospective review of 103 patients with stage III NSCLC who had received C-CRT from January 2006 to October 2011 was performed...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29738279/cortical-thinning-and-structural-bone-changes-in-non-human-primates-after-single-fraction-whole-chest-irradiation
#19
Michael Farris, Emory R McTyre, Catherine Okoukoni, Greg Dugan, Brendan J Johnson, A William Blackstock, Michael T Munley, J Daniel Bourland, J Mark Cline, Jeffrey S Willey
Stereotactic body radiation therapy (SBRT) is associated with an increased risk of vertebral compression fracture. While bone is typically considered radiation resistant, fractures frequently occur within the first year of SBRT. The goal of this work was to determine if rapid deterioration of bone occurs in vertebrae after irradiation. Sixteen male rhesus macaque non-human primates (NHPs) were analyzed after whole-chest irradiation to a midplane dose of 10 Gy. Ages at the time of exposure varied from 45-134 months...
May 8, 2018: Radiation Research
https://www.readbyqxmd.com/read/29736351/right-ventricle-perforation-post-pacemaker-insertion-complicated-with-cardiac-tamponade
#20
Muhammad Khalid, Ghulam Murtaza, Muhammad Talha Ayub, Vijay Ramu, Timir Paul
Pacemaker-lead-associated right ventricular perforation is a life-threatening complication. Acute perforation usually presents within 24 hours. Patients with lead perforation are often asymptomatic but fatal complications like hemopericardium, leading to cardiac tamponade and death, are reported. Diagnosis is based on chest x-ray, computed tomography (CT) scan, and echocardiography. The management of the lead perforation is based on clinical presentation. Extraction is avoided in cases of chronic asymptomatic lead perforations because of the associated complications...
March 4, 2018: Curēus
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