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Iglesias-Garcia J, de la Iglesia-Garcia D, Lariño-Noia J, Dominguez-Muñoz JE. Endoscopic Ultrasound (EUS) Guided Elastography. Diagnostics (Basel) 2023; 13:diagnostics13101686. [PMID: 37238170 DOI: 10.3390/diagnostics13101686] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/24/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Endoscopic ultrasound (EUS) is an essential technique for the management of several diseases. Over the years, new technologies have been developed to improve and overcome certain limitations related to EUS-guided tissue acquisition. Among these new methods, EUS-guided elastography, which is a real-time method for the evaluation of tissue stiffness, has arisen as one of the most widely recognized and available. At present, there are available two different systems to perform an elastographic evaluation: strain elastography and shear wave elastography. Strain elastography is based on the knowledge that certain diseases lead to a change in tissue hardness while shear wave elastography monitored shear-wave propagation and measures its velocity. EUS-guided elastography has shown in several studies high accuracy in differentiating benign from malignant lesions from many different locations, mostly in the pancreas and lymph nodes. Therefore, nowadays, there are well-established indications for this technology, mainly for supporting the management of pancreatic diseases (diagnosis of chronic pancreatitis and differential diagnosis of solid pancreatic tumors) and characterization of different diseases. However, there are more data on new potential indications for the near future. In this review, we will present the theoretical bases of this technology and we will discuss the scientific evidence to support its use.
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Affiliation(s)
- Julio Iglesias-Garcia
- Department of Gastroenterology and Hepatology, Health Research Institute of Santiago de Compostela (IDIS), International Center for Education and Development in Gastroenterology (ICEDiG), University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Daniel de la Iglesia-Garcia
- Department of Gastroenterology and Hepatology, Health Research Institute of Santiago de Compostela (IDIS), International Center for Education and Development in Gastroenterology (ICEDiG), University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Jose Lariño-Noia
- Department of Gastroenterology and Hepatology, Health Research Institute of Santiago de Compostela (IDIS), International Center for Education and Development in Gastroenterology (ICEDiG), University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Juan Enrique Dominguez-Muñoz
- Department of Gastroenterology and Hepatology, Health Research Institute of Santiago de Compostela (IDIS), International Center for Education and Development in Gastroenterology (ICEDiG), University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
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D'Amico F, Wexner SD, Vaizey CJ, Gouynou C, Danese S, Peyrin-Biroulet L. Tools for fecal incontinence assessment: lessons for inflammatory bowel disease trials based on a systematic review. United European Gastroenterol J 2020; 8:886-922. [PMID: 32677555 DOI: 10.1177/2050640620943699] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Fecal incontinence is a disabling condition affecting up to 20% of women. OBJECTIVE We investigated fecal incontinence assessment in both inflammatory bowel disease and non-inflammatory bowel disease patients to propose a diagnostic approach for inflammatory bowel disease trials. METHODS We searched on Pubmed, Embase and Cochrane Library for all studies on adult inflammatory bowel disease and non-inflammatory bowel disease patients reporting data on fecal incontinence assessment from January 2009 to December 2019. RESULTS In total, 328 studies were included; 306 studies enrolled non-inflammatory bowel disease patients and 22 studies enrolled inflammatory bowel disease patients. In non-inflammatory bowel disease trials the most used tools were the Wexner score, fecal incontinence quality of life questionnaire, Vaizey score and fecal incontinence severity index (in 187, 91, 62 and 33 studies). Anal manometry was adopted in 41.2% and endoanal ultrasonography in 34.0% of the studies. In 142 studies (46.4%) fecal incontinence evaluation was performed with a single instrument, while in 64 (20.9%) and 100 (32.7%) studies two or more instruments were used. In inflammatory bowel disease studies the Wexner score, Vaizey score and inflammatory bowel disease quality of life questionnaire were the most commonly adopted tools (in five (22.7%), five (22.7%) and four (18.2%) studies). Anal manometry and endoanal ultrasonography were performed in 45.4% and 18.2% of the studies. CONCLUSION Based on prior validation and experience, we propose to use the Wexner score as the first step for fecal incontinence assessment in inflammatory bowel disease trials. Anal manometry and/or endoanal ultrasonography should be taken into account in the case of positive questionnaires.
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Affiliation(s)
- Ferdinando D'Amico
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, Vandoeuvre-lès-Nancy, France
| | - Steven D Wexner
- Department of Colorectal Surgery, Cleveland Clinic Florida, Weston USA
| | | | - Célia Gouynou
- Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, Vandoeuvre-lès-Nancy, France
| | - Silvio Danese
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,IBD Center, Department of Gastroenterology, Humanitas Clinical and Research Center-IRCCS, Rozzano, Milan, Italy
| | - Laurent Peyrin-Biroulet
- Department of Gastroenterology and Inserm NGERE U1256, University Hospital of Nancy, Vandoeuvre-lès-Nancy, France
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Transperineal ultrasound for assessment of fistulas and abscesses: a pictorial essay. J Ultrasound 2019; 22:241-249. [PMID: 31066004 DOI: 10.1007/s40477-019-00381-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 04/22/2019] [Indexed: 02/07/2023] Open
Abstract
Perianal fistulas and abscesses may be cryptogenetic or associated with inflammatory bowel disease (IBD), specifically Crohn's disease. Proper identification and classification of these lesions are paramount for correct therapeutic management. Current diagnostic modalities include MRI (magnetic resonance imaging), EUS (endoscopic ultrasound), EUA (exam under anaesthesia) and recently, transperineal ultrasound (TPUS). The latter has been proposed as a noninvasive, easily available and cost-effective technique to diagnose, assess and follow up perianal disease particularly in IBD patients. This pictorial review focuses on the role of TPUS in clinical practice, highlighting the features of fistulas and abscesses.
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Nuernberg D, Saftoiu A, Barreiros AP, Burmester E, Ivan ET, Clevert DA, Dietrich CF, Gilja OH, Lorentzen T, Maconi G, Mihmanli I, Nolsoe CP, Pfeffer F, Rafaelsen SR, Sparchez Z, Vilmann P, Waage JER. EFSUMB Recommendations for Gastrointestinal Ultrasound Part 3: Endorectal, Endoanal and Perineal Ultrasound. Ultrasound Int Open 2019; 5:E34-E51. [PMID: 30729231 PMCID: PMC6363590 DOI: 10.1055/a-0825-6708] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 11/23/2018] [Accepted: 12/01/2018] [Indexed: 02/07/2023] Open
Abstract
This article represents part 3 of the EFSUMB Recommendations and Guidelines for Gastrointestinal Ultrasound (GIUS). It provides an overview of the examination techniques recommended by experts in the field of endorectal/endoanal ultrasound (ERUS/EAUS), as well as perineal ultrasound (PNUS). The most important indications are rectal tumors and inflammatory diseases like fistula and abscesses in patients with or without inflammatory bowel disease (IBD). PNUS sometimes is more flexible and convenient compared to ERUS. However, the technique of ERUS is quite well established, especially for the staging of rectal cancer. EAUS also gained ground in the evaluation of perianal diseases like fistulas, abscesses and incontinence. For the staging of perirectal tumors, the use of PNUS in addition to conventional ERUS could be recommended. For the staging of anal carcinomas, PNUS can be a good option because of the higher resolution. Both ERUS and PNUS are considered excellent guidance methods for invasive interventions, such as the drainage of fluids or targeted biopsy of tissue lesions. For abscess detection and evaluation, contrast-enhanced ultrasound (CEUS) also helps in therapy planning.
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Affiliation(s)
- Dieter Nuernberg
- Medical School Brandenburg Theodor Fontane, Gastroenterology, Neuruppin, Germany
| | - Adrian Saftoiu
- Research Center in Gastroenterology and Hepatology, University of Medicine and Pharmacy Craiova, Craiova, Romania
| | - Ana Paula Barreiros
- Deutsche Stiftung Organtransplantation, Head of Organisation Center Middle, Frankfurt, Germany
| | - Eike Burmester
- Department of Internal Medicine/Gastroenterology, Sana-Kliniken Lübeck, Lübeck, Germany
| | - Elena Tatiana Ivan
- Research Center in Gastroenterology and Hepatology, University of Medicine and Pharmacy Craiova, Craiova, Romania
| | - Dirk-André Clevert
- Department of Clinical Radiology, Interdisciplinary Ultrasound-Center, University of Munich-Grosshadern Campus, Munich, Germany
| | | | - Odd Helge Gilja
- National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital and Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Torben Lorentzen
- Ultrasound Section, Division of Surgery, Department of Gastroenterology, Herlev Hospital, University of Copenhagen, Herlev, Denmark
| | - Giovanni Maconi
- Gastroenterology Unit, Department of Biomedical and Clinical Sciences, "L.Sacco" University Hospital, Milan, Italy
| | - Ismail Mihmanli
- Istanbul University - Cerrahpasa, Cerrahpasa Medical Faculty, Department of Radiology and ALKA Radyoloji Tani Merkezi, Istanbul, Turkey
| | - Christian Pallson Nolsoe
- Ultrasound Section, Division of Surgery, Department of Gastroenterology, Herlev Hospital and Copenhagen Academy for Medical Education and Simulation (CAMES), University of Copenhagen, Denmark
| | - Frank Pfeffer
- Department of Surgery, Haukeland University Hospital and Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Søren Rafael Rafaelsen
- Colorectal Centre of Excellence, Clinical Cancer Centre, University Hospital of Southern Denmark, Vejle, Denmark
| | - Zeno Sparchez
- 3rd Medical Department, "Iuliu Hatieganu" University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Peter Vilmann
- Endoscopy Department, Copenhagen University Hospital Herlev, Herlev, Denmark
| | - Jo Erling Riise Waage
- Department of Surgery, Haukeland University Hospital and Department of Clinical Medicine, University of Bergen, Bergen, Norway
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Abstract
Strain elastography as used in EUS (EUS-real-time tissue elastography [RTE]) is a qualitative technique and provides information on the relative stiffness between one tissue and another. This article reviews the principles, technique, and interpretation of EUS-RTE in various organs. It includes information on how to optimize the technique as well as a discussion on pitfalls and artifacts. We also refer to the article describing RTE using conventional ultrasound transducers.
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Affiliation(s)
- Christoph F Dietrich
- Department of Internal Medicine, Caritas-Krankenhaus Bad Mergentheim, Uhlandstraße 7, D-97980 Bad Mergentheim, Germany; Ultrasound Department, First Affiliated Hospital of Zhengzhou University, Zhenzhou, Henan Province, China
| | - Ellison Bibby
- Consultant, Hitachi Medical Systems Europe Holding Ltd., Craiova, Romania
| | - Christian Jenssen
- Department of Internal Medicine, Krankenhaus Märkisch Oderland Strausberg/Wriezen, Teaching Hospital Medical University Brandenburg "Theodor Fontane", Brandenburg, Germany
| | - Adrian Saftoiu
- Department of Gastroenterology, Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy, Craiova, Romania
| | - Julio Iglesias-Garcia
- Department of Gastroenterology and Hepatology, Health Research Institute (IDIS), University Hospital of Santiago de Compostela, Spain
| | - Roald F Havre
- Department of Medicine, National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen, Norway
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Dietrich CF, Barr RG, Farrokh A, Dighe M, Hocke M, Jenssen C, Dong Y, Saftoiu A, Havre RF. Strain Elastography - How To Do It? Ultrasound Int Open 2017; 3:E137-E149. [PMID: 29226273 DOI: 10.1055/s-0043-119412] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 08/27/2017] [Accepted: 08/29/2017] [Indexed: 12/11/2022] Open
Abstract
Tissue stiffness assessed by palpation for diagnosing pathology has been used for thousands of years. Ultrasound elastography has been developed more recently to display similar information on tissue stiffness as an image. There are two main types of ultrasound elastography, strain and shear wave. Strain elastography is a qualitative technique and provides information on the relative stiffness between one tissue and another. Shear wave elastography is a quantitative method and provides an estimated value of the tissue stiffness that can be expressed in either the shear wave speed through the tissues in meters/second, or converted to the Young's modulus making some assumptions and expressed in kPa. Each technique has its advantages and disadvantages and they are often complimentary to each other in clinical practice. This article reviews the principles, technique, and interpretation of strain elastography in various organs. It describes how to optimize technique, while pitfalls and artifacts are also discussed.
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Affiliation(s)
| | - Richard G Barr
- Radiology, Northeastern Ohio Medical University, Rootstown, United States
| | - André Farrokh
- Department of Breast Imaging and Interventions, University Hospital Schleswig-Holstein Campus Kiel, Kiel, Germany
| | - Manjiri Dighe
- Department of Biology, University of Washington, Radiology, Seattle, United States
| | - Michael Hocke
- HELIOS Klinikum Meiningen, Internal Medicine II, Meiningen, Germany
| | - Christian Jenssen
- Krankenhaus Märkisch Oderland Strausberg/ Wriezen, Klinik für Innere Medizin, Wriezen, Germany
| | - Yi Dong
- Zhongshan Hospital, Ultrasound, Shanghai, China
| | - Adrian Saftoiu
- University of Medicine and Pharmacy of Craiova, Research Center of Gastroenterology and Hepatology, Craiova, Romania
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Atkinson NSS, Bryant RV, Dong Y, Maaser C, Kucharzik T, Maconi G, Asthana AK, Blaivas M, Goudie A, Gilja OH, Nuernberg D, Schreiber-Dietrich D, Dietrich CF. How to perform gastrointestinal ultrasound: Anatomy and normal findings. World J Gastroenterol 2017; 23:6931-6941. [PMID: 29097866 PMCID: PMC5658311 DOI: 10.3748/wjg.v23.i38.6931] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/30/2017] [Accepted: 06/19/2017] [Indexed: 02/06/2023] Open
Abstract
Gastrointestinal ultrasound is a practical, safe, cheap and reproducible diagnostic tool in inflammatory bowel disease gaining global prominence amongst clinicians. Understanding the embryological processes of the intestinal tract assists in the interpretation of abnormal sonographic findings. In general terms, the examination principally comprises interrogation of the colon, mesentery and small intestine using both low-frequency and high-frequency probes. Interpretation of findings on GIUS includes assessment of bowel wall thickness, symmetry of this thickness, evidence of transmural changes, assessment of vascularity using Doppler imaging and assessment of other specific features including lymph nodes, mesentery and luminal motility. In addition to B-mode imaging, transperineal ultrasonography, elastography and contrast-enhanced ultrasonography are useful adjuncts. This supplement expands upon these features in more depth.
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Affiliation(s)
- Nathan S S Atkinson
- Translational Gastroenterology Unit, Oxford University Hospitals NHS Foundation Trust, Oxford OX3 9DU, United Kingdom
| | - Robert V Bryant
- School of Medicine, University of Adelaide, Adelaide, South Australia, 5005, Australia
- Department of Gastroenterology and Hepatology, Royal Adelaide Hospital, Adelaide 5000, Australia
| | - Yi Dong
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Christian Maaser
- Ambulanzzentrum Gastroenterologie, Klinikum Lüneburg, 21339 Lüneburg, Germany
| | - Torsten Kucharzik
- Department of Gastroenterology, Städtisches Klinikum Luneburg gGmbH, 21339 Lüneburg, Germany
| | - Giovanni Maconi
- Gastrointestinal Unit, Department of Biomedical and Clinical Sciences, “L.Sacco” University Hospital, 20157 Milan, Italy
| | - Anil K Asthana
- Department of Gastroenterology and Hepatology, The Alfred Hospital, Melbourne, Vic, Australia; Monash University, Melbourne 3004 Vic, Australia
| | - Michael Blaivas
- Piedmont Hospital, Department of Emergency Medicine, Atlanta, GA 30076, United States
| | - Adrian Goudie
- Fremantle Hospital and Health Service, Emergency Department, Fremantle, WA 6160, United States
| | - Odd Helge Gilja
- National Centre for Ultrasound in Gastroenterology, Haukeland University Hospital, Bergen N-5021, Norway
- Department of Clinical Medicine, University of Bergen, 5021 Bergen, Norway
| | - Dieter Nuernberg
- Department of Gastroenterology, Brandenburg Medical School, 16816 Neuruppin, Germany
| | | | - Christoph F Dietrich
- Med. Klinik 2, Caritas-Krankenhaus Bad Mergentheim, D-97980 Bad Mergentheim, Germany
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Ignee A, Dong Y, Schuessler G, Baum U, Dietrich CF. Endorectal fusion imaging: A description of a new technique. Endosc Ultrasound 2017; 6:241-244. [PMID: 28685744 PMCID: PMC5579909 DOI: 10.4103/2303-9027.209868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Fusion imaging is an accepted method in abdominal imaging allowing a simultaneous display of reference imaging with a live ultrasound (US) investigation. For prostate cancer, promising results have been published for endorectal US (ERUS)-guided biopsy of suspicious lesions in magnetic resonance imaging (MRI). To our knowledge, no other indication for the fusion of ERUS with MRI has been reported so far. METHODS We report on three patients scheduled for ERUS due to anorectal fistulae after treatment (n = 2) or rectal carcinoma (n = 1), which were scheduled for real-time virtual onography (RVS), a method for the fusion of MRI imaging with US. RESULTS In all patients, RVS was successful. The course of the fistulae could be defined and the success of the treatment could be confirmed. In the patient with rectal carcinoma, the lymph nodes suspicious in MRI could be identified. CONCLUSIONS MRI/ERUS fusion has the potential for follow-up of anorectal fistulae and abscesses, and staging of anal and rectal tumors.
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Affiliation(s)
- Andre Ignee
- Medical Department 2, Caritas-Krankenhaus, Bad Mergentheim, Germany
| | - Yi Dong
- Medical Department 2, Caritas-Krankenhaus, Bad Mergentheim, Germany
| | | | - Ulrich Baum
- Department of Radiology, Caritas-Krankenhaus, Bad Mergentheim, Germany
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9
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Kumar L, Emmanuel A. Internal anal sphincter: Clinical perspective. Surgeon 2016; 15:211-226. [PMID: 27881288 DOI: 10.1016/j.surge.2016.10.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 08/05/2016] [Accepted: 10/23/2016] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To summarise current knowledge of Internal anal sphincter. BACKGROUND The internal anal sphincter (IAS) is the involuntary ring of smooth muscle in the anal canal and is the major contributor to the resting pressure in the anus. Structural injury or functional weakness of the muscle results in passive incontinence of faeces and flatus. With advent of new assessment and treatment modalities IAS has become an important topic for surgeons. This review was undertaken to summarise our current knowledge of internal anal sphincter and highlight the areas that need further research. METHOD The PubMed database was used to identify relevant studies relating to internal anal sphincter. RESULTS The available evidence has been summarised and advantages and limitations highlighted for the different diagnostic and therapeutic techniques. CONCLUSION Our understanding of the physiology and pharmacology of IAS has increased greatly in the last three decades. Additionally, there has been a rise in diagnostic and therapeutic techniques specifically targeting the IAS. Although these are promising, future research is required before these can be incorporated into the management algorithm.
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Affiliation(s)
- Lalit Kumar
- GI Physiology Unit, University College Hospital, London, UK.
| | - Anton Emmanuel
- GI Physiology Unit, University College Hospital, London, UK; University College London, UK.
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Dietrich CF, Dong Y. Shear wave elastography with a new reliability indicator. J Ultrason 2016; 16:281-7. [PMID: 27679731 PMCID: PMC5034022 DOI: 10.15557/jou.2016.0028] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 04/23/2016] [Accepted: 04/28/2016] [Indexed: 12/21/2022] Open
Abstract
Non-invasive methods for liver stiffness assessment have been introduced over recent years. Of these, two main methods for estimating liver fibrosis using ultrasound elastography have become established in clinical practice: shear wave elastography and quasi-static or strain elastography. Shear waves are waves with a motion perpendicular (lateral) to the direction of the generating force. Shear waves travel relatively slowly (between 1 and 10 m/s). The stiffness of the liver tissue can be assessed based on shear wave velocity (the stiffness increases with the speed). The European Federation of Societies for Ultrasound in Medicine and Biology has published Guidelines and Recommendations that describe these technologies and provide recommendations for their clinical use. Most of the data available to date has been published using the Fibroscan (Echosens, France), point shear wave speed measurement using an acoustic radiation force impulse (Siemens, Germany) and 2D shear wave elastography using the Aixplorer (SuperSonic Imagine, France). More recently, also other manufacturers have introduced shear wave elastography technology into the market. A comparison of data obtained using different techniques for shear wave propagation and velocity measurement is of key interest for future studies, recommendations and guidelines. Here, we present a recently introduced shear wave elastography technology from Hitachi and discuss its reproducibility and comparability to the already established technologies.
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Affiliation(s)
- Christoph F Dietrich
- Medizinische Klinik 2, Caritas-Krankenhaus Bad Mergentheim, Bad Mergentheim, Germany
| | - Yi Dong
- Department of Ultrasound, Zhongshan Hospital, Fudan University, 200032 Shanghai, China
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Cui XW, Chang JM, Kan QC, Chiorean L, Ignee A, Dietrich CF. Endoscopic ultrasound elastography: Current status and future perspectives. World J Gastroenterol 2015; 21:13212-13224. [PMID: 26715804 PMCID: PMC4679753 DOI: 10.3748/wjg.v21.i47.13212] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 08/04/2015] [Accepted: 09/30/2015] [Indexed: 02/07/2023] Open
Abstract
Elastography is a new ultrasound modality that provides images and measurements related to tissue stiffness. Endoscopic ultrasound (EUS) has played an important role in the diagnosis and management of numerous abdominal and mediastinal diseases. Elastography by means of EUS examination can assess the elasticity of tumors in the proximity of the digestive tract that are hard to reach with conventional transcutaneous ultrasound probes, such as pancreatic masses and mediastinal or abdominal lymph nodes, thus improving the diagnostic yield of the procedure. Results from previous studies have promised benefits for EUS elastography in the differential diagnosis of lymph nodes, as well as for assessing masses with pancreatic or gastrointestinal (GI) tract locations. It is important to mention that EUS elastography is not considered a modality that can replace biopsy. However, it may be a useful adjunct, improving the accuracy of EUS-fine needle aspiration biopsy (EUS-FNAB) by selecting the most suspicious area to be targeted. Even more, it may be useful for guiding further clinical management when EUS-FNAB is negative or inconclusive. In the present paper we will discuss the current knowledge of EUS elastography, including the technical aspects, along with its applications in the differential diagnosis between benign and malignant solid pancreatic masses and lymph nodes, as well as its aid in the differentiation between normal pancreatic tissues and chronic pancreatitis. Moreover, the emergent indication and future perspectives are summarized, such as the benefit of EUS elastography in EUS-guided fine needle aspiration biopsy, and its uses for characterization of lesions in liver, biliary tract, adrenal glands and GI tract.
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12
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Albuquerque A. Endoanal ultrasonography in fecal incontinence: Current and future perspectives. World J Gastrointest Endosc 2015; 7:575-581. [PMID: 26078826 PMCID: PMC4461932 DOI: 10.4253/wjge.v7.i6.575] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 03/18/2015] [Accepted: 04/20/2015] [Indexed: 02/05/2023] Open
Abstract
Fecal incontinence has a profound impact in a patient’s life, impairing quality of life and carrying a substantial economic burden due to health costs. It is an underdiagnosed condition because many affected patients are reluctant to report it and also clinicians are usually not alert to it. Patient evaluation with a detailed clinical history and examination is very important to indicate the type of injury that is present. Endoanal ultrasonography is currently the gold standard for sphincter evaluation in fecal incontinence and is a simple, well-tolerated and non-expensive technique. Most studies revealed 100% sensitivity in identifying sphincter defect. It is better than endoanal magnetic resonance imaging for internal anal sphincter defects, equivalent for the diagnosis of external anal sphincter defects, but with a lower capacity for assessment of atrophy of this sphincter. The most common cause of fecal incontinence is anal sphincter injury related to obstetric trauma. Only a small percentage of women are diagnosed with sphincter tears immediately after vaginal delivery, but endoanal ultrasonography shows that one third of these women have occult sphincter defects. Furthermore, in patients submitted to primary repair of these tears, ultrasound revealed a high frequency of persistent sphincter defects after surgery. Three-dimensional endoanal ultrasonography is currently largely used and accepted for sphincter evaluation in fecal incontinence, improving diagnostic accuracy and our knowledge of physiologic and pathological sphincters alterations. Conversely, there is currently no evidence to support the use of elastography in fecal incontinence evaluation.
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13
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Chiorean L, Schreiber-Dietrich D, Braden B, Cui XW, Buchhorn R, Chang JM, Dietrich CF. Ultrasonographic imaging of inflammatory bowel disease in pediatric patients. World J Gastroenterol 2015; 21:5231-41. [PMID: 25954096 PMCID: PMC4419063 DOI: 10.3748/wjg.v21.i17.5231] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/26/2015] [Accepted: 03/31/2015] [Indexed: 02/06/2023] Open
Abstract
Inflammatory bowel disease (IBD) is one of the most common chronic gastrointestinal diseases in pediatric patients. Choosing the optimal imaging modality for the assessment of gastrointestinal disease in pediatric patients can be challenging. The invasiveness and patient acceptance, the radiation exposure and the quality performance of the diagnostic test need to be considered. By reviewing the literature regarding imaging in inflammatory bowel disease the value of ultrasound in the clinical management of pediatric patients is highlighted. Transabdominal ultrasound is a useful, noninvasive method for the initial diagnosis of IBD in children; it also provides guidance for therapeutic decisions and helps to characterize and predict the course of the disease in individual patients. Ultrasound techniques including color Doppler imaging and contrast-enhanced ultrasound are promising imaging tools to determine disease activity and complications. Comparative studies between different imaging methods are needed.
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Dietrich CF, Săftoiu A, Jenssen C. Real time elastography endoscopic ultrasound (RTE-EUS), a comprehensive review. Eur J Radiol 2013; 83:405-14. [PMID: 23643030 DOI: 10.1016/j.ejrad.2013.03.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 02/28/2013] [Accepted: 03/24/2013] [Indexed: 12/15/2022]
Abstract
Real-time elastography (RTE) performed during endoscopic ultrasound (EUS) is a relatively new technique which allows the evaluation of tissue stiffness, with the intent of better characterising lesions during EUS examinations. The aim of this comprehensive review was to describe the technique of RTE-EUS, as well as the clinical applications, including the study of pancreatic lesions, but also hepatobiliary, gastrointestinal (GI) tract pathology (including anal canal), lymph nodes, adrenal glands, lung and mediastinum, as well as urogenital applications. One of the advantages of the RTE-EUS technique is especially the possibility to be used in various locations accessible from the GI tract. Future developments are also briefly discussed, as elastography is a tissue characterising technique that will certainly not replace biopsy, but will rather be an adjunct during EUS examinations, due to its ease of use and low cost.
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Affiliation(s)
- C F Dietrich
- Med. Klinik 2, Caritas-Krankenhaus Bad Mergentheim, Germany; Department of Gastroenterology, Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy of Craiova, Romania; Klinik für Innere Medizin, Krankenhaus Märkisch Oderland, Germany.
| | - A Săftoiu
- Med. Klinik 2, Caritas-Krankenhaus Bad Mergentheim, Germany; Department of Gastroenterology, Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy of Craiova, Romania; Klinik für Innere Medizin, Krankenhaus Märkisch Oderland, Germany
| | - C Jenssen
- Med. Klinik 2, Caritas-Krankenhaus Bad Mergentheim, Germany; Department of Gastroenterology, Research Center of Gastroenterology and Hepatology, University of Medicine and Pharmacy of Craiova, Romania; Klinik für Innere Medizin, Krankenhaus Märkisch Oderland, Germany
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De La Portilla F. Avances y futuro del tratamiento de la incontinencia fecal. REVISTA MÉDICA CLÍNICA LAS CONDES 2013. [DOI: 10.1016/s0716-8640(13)70157-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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16
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Iglesias-Garcia J, Lindkvist B, Lariño-Noia J, Domínguez-Muñoz JE. Endoscopic ultrasound elastography. Endosc Ultrasound 2012; 1:8-16. [PMID: 24949330 PMCID: PMC4062202 DOI: 10.7178/eus.01.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Revised: 02/08/2012] [Accepted: 02/27/2012] [Indexed: 12/13/2022] Open
Abstract
Endoscopic ultrasound (EUS) is a reference technique for diagnosing and staging several different diseases. EUS-guided biopsies and fine needle aspirations are used to improve diagnostic performance of cases where a definitive diagnosis cannot be obtained through conventional EUS. However, EUS-guided tissue sampling requires experience and is associated with a low but not negligible risk of complications. EUS elastography is a non-invasive method that can be used in combination with conventional EUS and has the potential for improving the diagnostic accuracy and reducing the need for EUS-guided tissue sampling in several situations. Elastography measures tissue stiffness by evaluating changes in the EUS image before and after the application of slight pressure to the target tissue by the ultrasonography probe. Pathologic processes such as cancerization and fibrosis alter tissue elasticity and therefore induce changes in elastographic appearance. Qualitative elastography depicts tissue stiffness using different colors, whereas quantitative elastography renders numerical results expressed as a strain ratio or hue histogram mean. EUS elastography has been proven to differentiate between benign and malignant solid pancreatic masses, as well as between benign and malignant lymph nodes with a high accuracy. Studies have also demonstrated that the early changes of chronic pancreatitis can be distinguished from normal pancreatic tissues under EUS elastography. In this article, we review the technical aspects and current clinical applications of qualitative and quantitative EUS elastography and emphasize the potential additional indications that need to be evaluated in future clinical studies.
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Affiliation(s)
- Julio Iglesias-Garcia
- Department of Gastroenterology and Foundation for Research in Digestive Diseases (FIENAD), University Hospital of Santiago de Compostela, Spain
| | - Björn Lindkvist
- Department of Gastroenterology and Foundation for Research in Digestive Diseases (FIENAD), University Hospital of Santiago de Compostela, Spain
- Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Jose Lariño-Noia
- Department of Gastroenterology and Foundation for Research in Digestive Diseases (FIENAD), University Hospital of Santiago de Compostela, Spain
| | - J. Enrique Domínguez-Muñoz
- Department of Gastroenterology and Foundation for Research in Digestive Diseases (FIENAD), University Hospital of Santiago de Compostela, Spain
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Sarvazyan A, Hall TJ, Urban MW, Fatemi M, Aglyamov SR, Garra BS. AN OVERVIEW OF ELASTOGRAPHY - AN EMERGING BRANCH OF MEDICAL IMAGING. Curr Med Imaging 2011; 7:255-282. [PMID: 22308105 PMCID: PMC3269947 DOI: 10.2174/157340511798038684] [Citation(s) in RCA: 235] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
From times immemorial manual palpation served as a source of information on the state of soft tissues and allowed detection of various diseases accompanied by changes in tissue elasticity. During the last two decades, the ancient art of palpation gained new life due to numerous emerging elasticity imaging (EI) methods. Areas of applications of EI in medical diagnostics and treatment monitoring are steadily expanding. Elasticity imaging methods are emerging as commercial applications, a true testament to the progress and importance of the field.In this paper we present a brief history and theoretical basis of EI, describe various techniques of EI and, analyze their advantages and limitations, and overview main clinical applications. We present a classification of elasticity measurement and imaging techniques based on the methods used for generating a stress in the tissue (external mechanical force, internal ultrasound radiation force, or an internal endogenous force), and measurement of the tissue response. The measurement method can be performed using differing physical principles including magnetic resonance imaging (MRI), ultrasound imaging, X-ray imaging, optical and acoustic signals.Until recently, EI was largely a research method used by a few select institutions having the special equipment needed to perform the studies. Since 2005 however, increasing numbers of mainstream manufacturers have added EI to their ultrasound systems so that today the majority of manufacturers offer some sort of Elastography or tissue stiffness imaging on their clinical systems. Now it is safe to say that some sort of elasticity imaging may be performed on virtually all types of focal and diffuse disease. Most of the new applications are still in the early stages of research, but a few are becoming common applications in clinical practice.
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Waage JER, Havre RF, Odegaard S, Leh S, Eide GE, Baatrup G. Endorectal elastography in the evaluation of rectal tumours. Colorectal Dis 2011; 13:1130-7. [PMID: 21040360 DOI: 10.1111/j.1463-1318.2010.02440.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
AIM Real-time elastography visualizes tissue compliance using an ultrasound platform. Elastography has been used, particularly in the breast, to characterize indeterminate lesions on B-mode imaging as either benign or malignant. The primary aim of this study was to assess the feasibility of routine endorectal elastography to evaluate rectal neoplasia. The secondary aim was to correlate elastography data with histopathological end-points. METHOD Sixty-nine patients referred to the outpatient clinic of the Department of Colorectal Surgery at Haukeland University Hospital for the evaluation of rectal tumours were included in this prospective cohort study. All patients underwent digital rectal examination, rigid rectoscopy with biopsy, endorectal ultrasonography and endorectal elastography. In each case a strain ratio was calculated, comparing the tumour tissue with adjacent reference tissue that appeared normal on ultrasound scanning. RESULTS Histopathologically there were 23 adenomas and 45 adenocarcinomas. One patient died before surgical treatment. Adequate elastography images were obtained in 66/69 (96%) patients. Optimal discrimination of malignant and benign lesions was obtained using a strain ratio cut-off value of 1.25 (sensitivity, 0.93; specificity, 0.96; and accuracy, 0.94). CONCLUSION Endorectal elastography can be performed as an integral part of the clinical evaluation of rectal tumours and has good patient compliance. The method is a promising modality for the discrimination between adenocarcinoma and adenoma of the rectum.
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Affiliation(s)
- J E R Waage
- Department of Surgery, Haukeland University Hospital, Bergen, Norway.
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