DOCSLIB.ORG

AUR 2019 Research Paper Abstracts

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
AUR 2019 Research Paper Abstracts AUR 2019 Research Paper Abstracts Research papers are oral educational or scientific presentations that are 8 minutes in length, followed by a 2-minute discussion period. Present- ing author is identified by institution name, city, and state (or country if not United States or Canada). Presentations by trainees (medical students, residents, or 1st-year fellows) are noted in blue. Thursday, April 11, 2019 (SS01-02) 1:10 PM - 1:20 PM The Impact of Additional Tin Filtration on Contrast 1:00–2:30 PM Enhancement, Image Quality, and Radiation Dose Reduction of Renal Lesions at Multidetector Computed SS01: Abdominal, Cardiopulmonary, MSK Tomography: A Phantom Study Location: Holiday Ballrooms 1-2 Tugce Agirlar Trabzonlu, MD★, Northwestern University Feinberg Moderator: Joseph C. Veniero, MD, PhD School of Medicine, Chicago, IL; Amirhossein Mozafarykhamseh★; Va- Diego F. Lemos, MD hid Yaghmai, MD ([email protected]) PURPOSE: Spectral tin filtration technique has been shown to decrease the radiation dose when compared to standard protocols. Our purpose is (SS01-01) 1:00 PM - 1:10 PM to evaluate the effect of the tin filtered based CT protocol on contrast en- Efficacy of Remote, Videoconference Peer Teacher hancement, image quality and radiation dose by using a renal phantom. RESEARCH PAPERS RESEARCH Training for Hands-On Musculoskeletal Ultrasound METHOD AND MATERIALS: A phantom containing 15 tubes embed- Workshops: A Pilot Study ded in a structure resembling kidney was used. The tubes were filled Netanel S. Berko, MD, University of Pennsylvania, Philadelphia, PA; with a serial dilution of iodinated contrast (from 0.156 mg/cc to 6mg/ Andrew C. Friedman; Lauren H. Goldman; Anirudh Paspulati; Leo H. cc). The phantom was scanned at various six tube voltages (from 70 Menashe; Beverly Thornhill, et al ([email protected]) to 140 kV) and at 150 kV with an additional tin filter(Sn) with iterative PURPOSE: To determine the efficacy of remote, videoconference peer reconstruction and scanned with 120 kV-filtered back projection (FBP) teacher training for hands-on musculoskeletal ultrasound workshops. protocol. Radiation exposure was estimated by the volume CT dose in- METHOD AND MATERIALS: Hands-on musculoskeletal ultrasound dex (CTDIvol). All measurements were performed by drawing regions scanning workshops were designed for residents. Several residents re- of interest(ROIs). To examine the effect on contrast enhancement (CE), ceived training prior to the workshops, and served as peer teachers during regression analysis was performed to determine the attenuation values the sessions. Two sets of workshops were performed. Prior to one set for the tin filtered technique corresponding to 10 and 20 HU enhance- of workshops the peer teachers received in-person, hands-on training, ments at 120 kV. To evaluate image quality, image noise (SD) and CNR while before the other set of workshops training for the peer teachers were compared between Sn150kV technique and 120 kV with FBP was performed remotely, utilizing a videoconference setup. Surveys were technique. To evaluate the effect on radiation dose, regression analysis distributed to the peer teachers and workshop participants following the were employed for CDTIvol values for different tube voltages and for workshops to determine the efficacy of the two types of training. The sur- SD values for different iodine concentrations and tube voltages. Data veys consisted of statements with 5-point Likert scale responses regard- was analyzed to determine the kV and CDTIvol value of SD value at ing the training. Median scores and interquartile ranges (IQR 25th-75th non-filtered technique corresponding to the SD value at Sn150kV. percentiles) were recorded, and T-test was used to compare results. RESULTS: The CE of 10 HU and 20 HU at 120 kV corresponded to RESULTS: There were 6 peer teachers and 37 learners in the in-person 5.02 HU and 9.8 HU at tin-filtered technique respectively (R2=0.998). training group and 3 peer teachers and 12 learners in the remote training The image noise of Sn 150 kV corresponded to image noise of 109 kV group. Peer teachers in both groups felt adequately prepared, reporting (R2=1.000, p<0.001). CDTIvol was reduced by 40.3% with tin filtered high comfort level with the material (median score for both groups: 4, P technique while maintaining the same level of image noise. CNR was = 0.57). Peer teachers trained remotely felt they were able to adequately higher at the 120 kV-FBP group when compared to the tin filtered answer questions (median 5, IQR 5-5) better than those who received in- group(p<0.001). person training (median 4, IQR 3.25-4.75, P=0.04). Peer teachers in both CONCLUSION: After applying tin filtration, to evaluate a renal lesion, it is groups found the experience enjoyable, were interested in serving as peer important to adjust the threshold for enhancement. Without altering the teachers again, and highly rated the overall experience (median 5, IQR 5-5 image noise, 150 kV with tin filtered technique allows approximately 40% for both groups). The learners in both the remote group (median 5, IQR dose reduction compared to the protocol without spectral shaping. 4.75-5) and the in-person training group (median 5, IQR 4-5) deemed the peer teachers effective (P=0.49). (SS01-03) 1:20 PM - 1:30 PM CONCLUSION: Remote, videoconference training of peer teachers is Machine Learning for Detecting Pulmonary Nodules on an effective method of teaching hands-on skills. Peer teachers who Chest Radiographs: A Multi-Reader Trial with CT as the received remote training reported similar levels of knowledge and Standard of Reference comfort in teaching. Residents who were taught by the peer teachers in both groups reported that the peer teachers were effective. Riddhi Borse, Massachusetts General Hospital, Harvard Medical Sci- ences, Boston, MA; Reece Goiffon; Justin Stowell; Alexis M. Cahalane; Joseph King; Benjamin M. Kozak, MD, et al ([email protected]) PURPOSE: We performed a multi-reader study to assess accuracy of machine learning based bone subtraction algorithm (Riverain Inc.) for detection of pulmonary nodules on chest radiographs (CXR) with chest CT as the standard of reference (SOR). METHOD AND MATERIALS: With IRB approval, our study included posteroanterior projection CXR from 130 adult patients with (n= 103 patients) and without (n= 27 patients) pulmonary nodules who also underwent chest CT within 90 days of CXR. To establish SOR, two thoracic radiologists reviewed all CXR and CT and recorded presence, ★ Faculty financial disclosures are located in the Faculty Index. AUR 67th Annual Meeting 55 size, and location of pulmonary nodules. All chest radiographs were Further training of AI algorithm is required to improve detectability of exported, de-identified, and processed with the BSA algorithm. Two endobronchial nodules. radiology residents and two thoracic radiology clinical fellows indepen- dently recorded presence of lung nodules on the unprocessed (UpR), (SS01-05) 1:40 PM - 1:50 PM and then on the bone subtracted (BsR) radiographs. They graded the Design of a Musculoskeletal Ultrasound Bootcamp for findings on the BsR on a 5-point scale (1= finding on UpR not seen Radiology Residents on BsR, 2= no change in confidence on BsR, 3= some improvement Maria A. Bedoya, University of Pennsylvania, Philadelphia, PA; Teresa on BsR, 4= Substantial improvement, 5= finding on UpR not seen on Martin-Carreras; Stacey Elangovan; Mary H. Scanlon, MD; Netanel S. BsR). Descriptive statistics were performed in Microsoft Excel. Berko, MD ([email protected]) RESULTS: Per SOR, there were 175 nodules on 130 CXR (mean size PURPOSE: Radiology residents receive little or no musculoskeletal 1.43 ± 0.71). All four radiologists noted improved detection of pulmo- ultrasound training during residency. Our goal was to design a short nary nodules on BsR (43,45,34, 43 nodules) compared to UpR (28, 38, but comprehensive hands-on musculoskeletal ultrasound experience 31, 37 nodules, respectively) (p= 0.49- 0.86). The mean sizes (±SD) for radiology residents. of true positive nodules seen only on BsR were 1.8(±0.4), 1.55(±0.05), METHOD AND MATERIALS: A 3.5 hour hands-on workshop was 1.43(±0.13), and 1.26(±0.06) mm, respectively. These nodules were designed. The workshop was divided into segments based on ana- most frequently located in the right upper zone followed by the left tomic region; for each region core topics of competence were defined, upper zone. There were 38, 44, 22, 34 false positive nodules on UpR including joint effusion and bursitis. Additional topics covered were and 42,44 ,23 ,36 false positive nodules on BsR. All readers reported major tendons and ligaments, and simulation of image-guided inter- greater confidence for detection of lung nodules on BsR than on UpR ventions was performed as well. During the workshop an attending with a percentage increase of 41.74%,48.54%,25.2% and 46.6% on radiologist demonstrated scanning technique for each anatomic region, BsR from the baseline UpR respectively. and residents then performed scanning in small groups led by peer CONCLUSION: All radiologists detected more pulmonary nodules with teachers. Residents performed scanning before and after the work- greater confidence on CXR processed with machine learning based shop to assess skill acquisition, and also completed a survey following bone subtraction algorithm compared to native unprocessed CXR. the workshop to gauge confidence in performing musculoskeletal ultrasound examinations. The survey consisted of statements with (SS01-04) 1:30 PM - 1:40 PM 5-point Likert scale responses. Median responses and interquartile Accuracy of AI Based CAD for Detection of range (IQR, 25th-75th percentile) were calculated. Endobronchial Nodules on Low Dose CT for Lung RESULTS: 12 third-year residents participated in the workshop.
Load more

Recommended publications
  • A Rare Intravascular Tumour Diagnosed by Endobronchial Ultrasound
    Chest clinic IMAGES IN THORAX Thorax: first published as 10.1136/thoraxjnl-2016-208487 on 26 April 2016. Downloaded from A rare intravascular tumour diagnosed by endobronchial ultrasound William T Owen,1 Elena Karampini,2 Ronan A Breen,3 Mufaddal Moonim,4 Arjun Nair,5 Sally F Barrington,6 George Santis1 1Department of Respiratory A 24-year-old man was referred to the haematologists Medicine and Allergy, Kings for investigation of unexplained anaemia on the back- ’ College London, Guy s ground of a 6-month history of exertional breathless- Hospital, London, UK 2Department of Respiratory ness, mild cough and night sweats. Investigations Medicine and Allergy, Kings revealed iron-deficiency anaemia (haemoglobin College London, London, UK 94 g/L), thrombocytosis and markedly elevated 3 Department of Respiratory inflammatory markers (C-reactive protein (CRP) Medicine, Guy’s & St. Thomas’ fi NHS Foundation Trust, London, 235 mg/L). A CT scan of his chest identi ed a large UK expansile filling defect within the left main pul- 4Department of Cellular monary artery, almost entirely occluding the left- Pathology, Guy’s& sided pulmonary circulation, which had high-grade ’ St. Thomas NHS Foundation 18F-fluorodeoxyglucose (FDG) uptake on a subse- Trust, London, UK 5Department of Radiology, quent positron emission tomography (PET) CT ’ ’ (figure 1). Guy s & St. Thomas NHS Figure 2 Endobronchial ultrasound image showing a Foundation Trust, London, UK The lesion was assessed via endobronchial ultra- 6 hyperechoic soft tissue mass (M) within the left main PET Imaging Centre at sound (EBUS), which identified a hyperechoic soft St. Thomas’ Hospital, King’s pulmonary artery (PA).
    [Show full text]
  • Computed Tomography Angiographic Assessment of Acute Chest Pain
    SA-CME ARTICLE Computed Tomography Angiographic Assessment of Acute Chest Pain Matthew M. Miller, MD, PhD,* Carole A. Ridge, FFRRCSI,w and Diana E. Litmanovich, MDz Acute chest pain leads to 6 million Emergency Depart- Abstract: Acute chest pain is a leading cause of Emergency Depart- ment visits per year in the United States.1 Evaluation of acute ment visits. Computed tomography angiography plays a vital diag- chest pain often leads to a prolonged inpatient assessment, nostic role in such cases, but there are several common challenges with assessment duration often exceeding 12 hours. The associated with the imaging of acute chest pain, which, if unrecog- estimated cost of a negative inpatient chest pain assessment nized, can lead to an inconclusive or incorrect diagnosis. These 2,3 imaging challenges fall broadly into 3 categories: (1) image acquis- amounts to $8 billion per year in the United States. ition, (2) image interpretation (including physiological and pathologic The main challenge to diagnosis is the broad range of mimics), and (3) result communication. The aims of this review are to pathologies that can cause chest pain. Vascular causes describe and illustrate the most common challenges in the imaging of include pulmonary embolism (PE), traumatic and acute chest pain and to provide solutions that will facilitate accurate spontaneous aortic syndromes including aortic transection, diagnosis of the causes of acute chest pain in the emergency setting. dissection, intramural hematoma, and penetrating athero- sclerotic ulcer, aortitis, and coronary artery disease. The Key Words: acute chest pain, challenges, pulmonary angiography, latter will not be discussed in detail because of the com- aortography, computed tomography plexity and breadth of this topic alone.
    [Show full text]
  • Encyclopedia of Energy, Natural Resource, and Environmental
    Respiratory System First and second edition authors: Angus Jeffries Andrew Turley Pippa McGowan Third edition authors: Harish Patel Catherine Gwilt 4 th Edition CRASH COURSE SERIES EDITOR: Dan Horton-Szar BSc(Hons) MBBS(Hons) MRCGP Northgate Medical Practice, Canterbury, Kent, UK FACULTY ADVISOR: Omar S Usmani MBBS PhD FHEA FRCP NIHR Career Development Fellow, Clinical Senior Lecturer & Consultant Physician in Respiratory & Internal Medicine, National Heart and Lung Institute, Imperial College London and Royal Brompton Hospital, RespirLondon,a UK tory System Sarah Hickin BSc(Hons) MBBS F2, Heatherwood and Wexham Park Hospitals NHS Trust, Slough, UK James Renshaw BSc(Hons) MBBS F2, Whipps Cross University Hospital, Barts Health NHS Trust, London, UK Rachel Williams BSc(Hons) MBBS F2, West Middlesex University Hospital, London, UK Edinburgh London New York Oxford Philadelphia St Louis Sydney Toronto 2013 Commissioning Editor: Jeremy Bowes Development Editor: Helen Leng Project Manager: Andrew Riley Designer/Design Direction: Christian Bilbow Icon Illustrations: Geo Parkin Illustration Manager: Jennifer Rose © 2013 Elsevier Ltd. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Details on how to seek permission, further information about the publisher’s permissions policies and our arrangements with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/permissions. This book and the individual contributions contained in it are protected under copyright by the publisher (other than as may be noted herein).
    [Show full text]
  • 2019 ESC Guidelines for the Diagnosis and Management of Acute Pulmonary Embolism Developed in Collaboration with the European Respiratory Society (ERS)
    ESC GUIDELINES ACUTE PULMONARY EMBOLISM 2019 ESC Guidelines for the diagnosis and management of acute pulmonary embolism developed in collaboration with the European Respiratory Society (ERS) The Task Force for the diagnosis and management of acute pulmonary embolism of the European Society of Cardiology (ESC) Authors/Task Force Members: Stavros V. Konstantinides (Chairperson) (Germany/Greece), Guy Meyer (Co-Chairperson) (France), Cecilia Becattini (Italy), Héctor Bueno (Spain), Geert-Jan Geersing (Netherlands), Veli-Pekka Harjola (Finland), Menno V. Huisman (Netherlands), Marc Humbert (France), Catriona Sian Jennings (United Kingdom), David Jiménez (Spain), Nils Kucher (Switzerland), Irene Marthe Lang (Austria), Mareike Lankeit (Germany), Roberto Lorusso (Netherlands), Lucia Mazzolai (Switzerland), Nicolas Meneveau (France), Fionnuala Ní Áinle (Ireland), Paolo Prandoni (Italy), Piotr Pruszczyk (Poland), Marc Righini (Switzerland), Adam Torbicki (Poland), Eric Van Belle (France), and José Luis Zamorano (Spain) @ERSpublications New @ESCardio Guidelines for the Diagnosis and Management of Acute #PulmonaryEmbolism developed in collaboration with @EuroRespSoc now available: #cardiotwitter @erspublications http://bit.ly/2HnrJaj Cite this article as: Konstantinides SV, Meyer G, Becattini C, et al. 2019 ESC Guidelines for the diagnosis and management of acute pulmonary embolism developed in collaboration with the European Respiratory Society (ERS). Eur Respir J 2019; in press [https://doi.org/10.1183/13993003.01647-2019]. Correspondence: Stavros V. Konstantinides, Center for Thrombosis and Hemostasis, Johannes Gutenberg University Mainz, Building 403, Langenbeckstr. 1, 55131 Mainz, Germany. E-mail: stavros.konstantinides@ unimedizin-mainz.de; and Department of Cardiology, Democritus University of Thrace, 68100 Alexandroupolis, Greece. E-mail: [email protected]. Correspondence: Guy Meyer, Respiratory Medicine Department, Hôpital Européen Georges Pompidou, 20 Rue Leblanc, 75015 Paris, France.
    [Show full text]
  • ISSN: 2320-5407 Int. J. Adv. Res. 7(5), 1307-1317
    ISSN: 2320-5407 Int. J. Adv. Res. 7(5), 1307-1317 Journal Homepage: -www.journalijar.com Article DOI:10.21474/IJAR01/9166 DOI URL: http://dx.doi.org/10.21474/IJAR01/9166 RESEARCH ARTICLE EVALUATION OF PATIENTS WITH HEMOPTYSIS ATTENDING THE DEPARTMENT OF PULMONOLOGY SANTHIRAM MEDICAL COLLEGE. Dr. S. Anusha Rao. Assistant professor, Department of Pulmonology, SVIMS, Tirupati-517501. …………………………………………………………………………………………………….... Manuscript Info Abstract ……………………. ……………………………………………………………… Manuscript History Objective: To evaluate hemoptysis among patients who attended the Received: 24 March 2019 department of pulmonary medicine, Santhiram medical college and Final Accepted: 26 April 2019 general hospital. Published: May 2019 Material And Methods: This was a descriptive cross sectional study done on patients with at least one episode of hemoptysis attending to the Department of pulmonary medicine, Santhiram medical college and general hospital from January 2015 to August 2016. All the patients are evaluated by -Chest x-ray pa-view, CT-chest, Sputum for culture and sensitivity, Sputum for KOH mount, Sputum for AFB, Bronchoscopy, Upper airway and nasal examination, Complete blood picture, Coagulation profile, ECG, Complete urine examination, ICTC, 2d- Echo (if necessary).The final diagnosis is noted and the data will be statistically analysed. Results: The age of the patients ranged from 21-75 years with a mean age of 49.42 years. Predominant age group was 41-60 years accounting for 49%.48% had history of smoking and all the smokers in the study were males. Hypertension was the most common associated medical condition (27%) followed by Diabetes Mellitus (22%).Tuberculosis was the most common underlying lung disease from the history (36%).Consolidation was the most common radiographic feature in 39% patients.
    [Show full text]
  • Recommendation for the Evaluation and Treatment of Pulmonary Embolus
    Recommendation for the Evaluation and Treatment of Pulmonary Embolus Definition: Pulmonary embolism (PE) is a thrombus, usually originating in a lower extremity vein, that embolizes to the pulmonary arterial circulation. Depending on the size, location and hemodynamic effects, a pulmonary embolus can have minor, catastrophic or lethal consequences. The majority of pulmonary emboli are undiagnosed ante-mortem. Patients present with seemingly typical exacerbations of chronic disease processes such as COPD, asthma or bronchitis which may mask symptoms of undiagnosed PE. The diagnosis of a PE can be difficult because the signs and symptoms are often nonspecific and subtle. Risk stratification for the pre-test probability or likelihood of pulmonary embolism is useful in guiding diagnostic testing and algorithms can assist in decision-making. Patient being evaluated for a PE must be determined to be at either low risk for PE or at moderate to high risk. The PERC algorithm i.e., “Pulmonary Embolus Rule-Out Criteria” can be applied to low risk patients. Patient’s with a low pretest probability can be safely ruled out for a PE with these decision rules or if testing with a negative d-dimer test. Patients with high pretest probability however, and a negative D-dimer cannot be ruled out because of negative predictive value of the D-dimer assay is not sufficient to rule-out a PE. Patients at risk should undergo CT pulmonary angiography or Ventilation/perfusion Scan (VQ Scan). Low Probability Hemodynamically stable Perform PERC Positive Chest X-Ray
    [Show full text]
  • Computed Tomography for Diagnosing Pulmonary Embolism
    Computed Tomography for Diagnosing Pulmonary Embolism A Health Technology Assessment The Health Technology Assessment Unit, University of Calgary March 21, 2017 1 Acknowledgements This report is authored by Laura E. Dowsett, Fiona Clement, Vishva Danthurebandara, Diane Lorenzetti, Kelsey Brooks, Dolly Han, Gail MacKean, Fartoon Siad, Tom Noseworthy and Eldon Spackman on behalf of the HTA Unit at the University of Calgary. Dr. Eldon Spackman has received personal non-specific financial compensation from Roboleo & Co and Astellas Pharma. The remaining authors declare no conflict of interests. This research was supported by the Health Technology Review (HTR), Province of BC. The views expressed herein do not necessarily represent those of the Government of British Columbia, the British Columbia Health Authorities, or any other agency. We gratefully acknowledge the valuable contributions of the key informants and thank them for their support. We also acknowledge the collaboration with CADTH to complete the cost- effectiveness model. 2 Contents Abbreviations .................................................................................................................................. 7 Executive Summary ........................................................................................................................ 8 1 Purpose of this Health Technology Assessment ................................................................... 12 2 Research Question and Research Objectives .......................................................................
    [Show full text]
  • Role of Cardiac MRI and CT in Fontan Circulation Michael Yeong1* , Will Loughborough2, Mark Hamilton3 and Nathan Manghat3
    Yeong et al. Journal of Congenital Cardiology (2017) 1:8 Journal of DOI 10.1186/s40949-017-0010-x Congenital Cardiology REVIEW Open Access Role of cardiac MRI and CT in Fontan circulation Michael Yeong1* , Will Loughborough2, Mark Hamilton3 and Nathan Manghat3 Abstract: A Fontan circulation is a series of palliative surgical procedures, which result in the diversion of the systemic venous return into pulmonary arterial circulation without passing through a ventricle. It is one of the available surgical strategies for patients with cardiac defects that preclude a successful bi-ventricular repair, which encompass a range of complex anatomy. This surgical repair has gone through a series of modifications since the concept was introduced in 1971. Echocardiography remains a vital tool in assessing patients with Fontan circulations but its limitations are well recognised. Cross-sectional imaging modalities such as cardiac MRI and CT are essential components in the systematic clinical evaluation of these patients. The purpose of this review is to understand the information that can be obtained with each cross-sectional modality as well as highlight the challenges that each modality faces. Keywords: Fontan, Cardiac MRI, Cardiac CT, Cross-sectional Imaging Background predominant technique until the 1980’s when the late A Fontan circulation is a series of palliative surgical pro- complications such as sinus node dysfunction, throm- cedures, which result in the diversion of the systemic bosis and right-sided pulmonary venous obstruction be- venous return into the pulmonary arterial circulation came increasingly apparent. Whilst this method is no without passing through a ventricle. It is one of the longer employed, adult patients with this style of Fontan available surgical strategies for patients with cardiac circuit are regularly encountered in clinical practice.
    [Show full text]
  • CT Pulmonary Angiography at Reduced Radiation Exposure and Contrast Material Volume Using Iterative Model Reconstruction and Idose4 Technique in Comparison to FBP
    RESEARCH ARTICLE CT Pulmonary Angiography at Reduced Radiation Exposure and Contrast Material Volume Using Iterative Model Reconstruction and iDose4 Technique in Comparison to FBP Azien Laqmani1*, Maximillian Kurfürst1, Sebastian Butscheidt1, Susanne Sehner2, Jakob Schmidt-Holtz1, Cyrus Behzadi1, Hans Dieter Nagel3, Gerhard Adam1, Marc Regier1 1 Department for Interventional and Diagnostic Radiology and Nuclear Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, 2 Department of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, 3 Science & Technology for Radiology, Buchholz, Germany a11111 * [email protected] Abstract Purpose To assess image quality of CT pulmonary angiography (CTPA) at reduced radiation expo- OPEN ACCESS sure (RD-CTPA) and contrast medium (CM) volume using two different iterative reconstruc- Citation: Laqmani A, Kurfürst M, Butscheidt S, tion (IR) algorithms (iDose4 and iterative model reconstruction (IMR)) in comparison to Sehner S, Schmidt-Holtz J, Behzadi C, et al. (2016) CT Pulmonary Angiography at Reduced Radiation filtered back projection (FBP). Exposure and Contrast Material Volume Using Iterative Model Reconstruction and iDose4 Technique Materials and Methods in Comparison to FBP. PLoS ONE 11(9): e0162429. < doi:10.1371/journal.pone.0162429 52 patients (body weight 100 kg, mean BMI: 23.9) with suspected pulmonary embolism (PE) underwent RD-CTPA (tube voltage: 80 kV; mean CTDIvol: 1.9 mGy) using 40 ml CM. Editor: Gayle E. Woloschak, Northwestern University 4 Feinberg School of Medicine, UNITED STATES Data were reconstructed using FBP and two different IR algorithms (iDose and IMR). Sub- jective and objective image quality and conspicuity of PE were assessed in central, seg- Received: May 25, 2016 mental, and subsegmental arteries.
    [Show full text]
  • VQ Scanning: Using SPECT and SPECT/CT
    Downloaded from jnm.snmjournals.org by on June 26, 2020. For personal use only. CONTINUING EDUCATION V/Q Scanning Using SPECT and SPECT/CT Paul J. Roach, Geoffrey P. Schembri, and Dale L. Bailey Department of Nuclear Medicine, Royal North Shore Hospital, and Sydney Medical School, University of Sydney, Sydney, Australia Learning Objectives: On successful completion of this activity, participants should be able to describe (1) advantages and shortcomings of planar versus SPECT V/Q scanning, (2) advantages and disadvantages of CT pulmonary angiography versus V/Q SPECT in the investigation of pulmonary embolism, and (3) an overview of image acquisition, processing, display, and reporting of V/Q SPECT studies. Financial Disclosure: The authors of this article have indicated no relevant relationships that could be perceived as a real or apparent conflict of interest. CME Credit: SNMMI is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to sponsor continuing education for physicians. SNMMI designates each JNM continuing education article for a maximum of 2.0 AMA PRA Category 1 Credits. Physicians should claim only credit commensurate with the extent of their participation in the activity. For CE credit, participants can access this activity through the SNMMI Web site (http:// www.snmmi.org/ce_online) through September 2016. visualized on planar scans (2,5). Added to these factors is the Planar ventilation–perfusion (V/Q) scanning is often used to inves- widespread use of probabilistic reporting criteria, and a relatively tigate pulmonary embolism; however, it has well-recognized limi- high indeterminate rate, both of which have caused significant tations. SPECT overcomes many of these through its ability to dissatisfaction among referring physicians (6,7).
    [Show full text]
  • V/Q Scanning Using SPECT and SPECT/CT
    Journal of Nuclear Medicine, published on August 1, 2013 as doi:10.2967/jnumed.113.124602 CONTINUING EDUCATION V/Q Scanning Using SPECT and SPECT/CT Paul J. Roach, Geoffrey P. Schembri, and Dale L. Bailey Department of Nuclear Medicine, Royal North Shore Hospital, and Sydney Medical School, University of Sydney, Sydney, Australia Learning Objectives: On successful completion of this activity, participants should be able to describe (1) advantages and shortcomings of planar versus SPECT V/Q scanning, (2) advantages and disadvantages of CT pulmonary angiography versus V/Q SPECT in the investigation of pulmonary embolism, and (3) an overview of image acquisition, processing, display, and reporting of V/Q SPECT studies. Financial Disclosure: The authors of this article have indicated no relevant relationships that could be perceived as a real or apparent conflict of interest. CME Credit: SNMMI is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to sponsor continuing education for physicians. SNMMI designates each JNM continuing education article for a maximum of 2.0 AMA PRA Category 1 Credits. Physicians should claim only credit commensurate with the extent of their participation in the activity. For CE credit, participants can access this activity through the SNMMI Web site (http:// www.snmmi.org/ce_online) through September 2016. visualized on planar scans (2,5). Added to these factors is the Planar ventilation–perfusion (V/Q) scanning is often used to inves- widespread use of probabilistic reporting criteria, and a relatively tigate pulmonary embolism; however, it has well-recognized limi- high indeterminate rate, both of which have caused significant tations.
    [Show full text]
  • Essentials of Thoracic Imaging
    Radiol Clin N Am 43 (2005) xi Preface Essentials of Thoracic Imaging Caroline Chiles, MD Guest Editor Diagnostic radiology, like many other medical amount of current literature in thoracic radiology to specialties, does not allow physicians to maintain the application of new technologies to bread-and- competence solely on the basis of accumulating ex- butter cases. Thank you to my colleagues who have perience, but requires a commitment to life–long shared their expertise in the basics of thoracic imag- learning. Keeping pace with new knowledge and ing: lung cancer, metastatic disease, the solitary pul- new technology competes with clinical demands on monary nodule, pneumonia, cardiovascular disease, a radiologist’s time. At the 2002 annual meeting in and high resolution CT. Thank you as well to Ron Chicago, the Radiological Society of North America Zagoria, who included me in the initial Radiological initiated a series of continuing medical education Society of North America Essentials faculty, and to lectures called bThe Essentials.Q Attendance and Barton Dudlick, who saw this project through from audience feedback surpassed all expectations. Sur- start to finish. veys of radiologists attending bThe EssentialsQ lectures showed an equal mix of general radiologists, Caroline Chiles, MD and radiologists who practice subspecialties outside Division of Radiological Sciences the lecture topic. The participants were seeking prac- Department of Radiology tical information that would impact their daily radiol- Wake Forest University School of Medicine ogy work—applying new technologies to diseases Medical Center Boulevard that are encountered every day. Winston-Salem, NC 27157-1088, USA My goal for this issue of Radiologic Clinics of E-mail address: [email protected] North America is to condense the overwhelming 0033-8389/05/$ – see front matter D 2005 Elsevier Inc.
    [Show full text]