Medical Ultrasonography

Papers
(The median citation count of Medical Ultrasonography is 0. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-03-01 to 2024-03-01.)
ArticleCitations
Medical Student Ultrasound Education, a WFUMB Position Paper, Part II. A consensus statement of ultrasound societies41
WFUMB position paper on reverberation artefacts in lung ultrasound: B-lines or comet-tails?23
Diagnostic value of lung ultrasound for neonatal respiratory distress syndrome: a meta-analysis and systematic review22
How to perform shear wave elastography. Part I22
Lung ultrasound in children, WFUMB review paper (part 2)17
The value of S-Detect in improving the diagnostic performance of radiologists for the differential diagnosis of thyroid nodules17
Ultrasound-Guided Attenuation Parameter (UGAP) for the quantification of liver steatosis using the Controlled Attenuation Parameter (CAP) as the reference method16
Intra- and inter-muscular differences in the cross-sectional area of the quadriceps muscles assessed by extended field-of-view ultrasonography15
Diagnostic accuracy of ultrasound superb microvascular imaging for breast tumor: a meta-analysis13
Safety of ultrasonic examinations; thermal and mechanical indices12
How to perform shear wave elastography. Part II12
History of Ultrasound in Medicine from its birth to date (2022), on occasion of the 50 Years Anniversary of EFSUMB. A publication of the European Federation of Societies for Ultrasound In Medicine and12
Quantification of Steatosis and Fibrosis using a new system implemented in an ultrasound machine12
Cystic echinococcosis, review and illustration of non-hepatic manifestations10
The value of S-Detect for the differential diagnosis of breast masses on ultrasound: a systematic review and pooled meta-analysis9
Diagnostic performance of ultrasound for rotator cuff tears: a systematic review and meta-analysis9
Transvaginal three-dimensional ultrasound for preoperative assessment of myometrial invasion in patients with endometrial cancer: a systematic review and meta-analysis9
„Knobology“ in Doppler Ultrasound9
The role of grey-scale ultrasound in the diagnosis of adhesive capsulitis of the shoulder: a systematic review and meta-analysis8
Contrast-enhanced ultrasound algorithm (ACR CEUS LI-RADSv 2017)– a valuable tool for the noninvasive diagnosis of hepatocellular carcinoma in patients with chronic liver disease8
Ultrasonography and SARS-CoV 2 infection: a review of what we know and do not yet know8
The learning curve for ultrasound-guided peripheral intravenous cannulation in adults: a multicenter study7
Transfer learning with pre-trained deep convolutional neural networks for the automatic assessment of liver steatosis in ultrasound images7
Hepatic inflammatory pseudotumor mimicking malignancy: the value of differential diagnosis on contrast enhanced ultrasound7
Ultrasound-based radiomics: current status, challenges and future opportunities7
Elastography of the uterine cervix in gynecology: normal appearance, cervical intraepithelial neoplasia and cancer. A systematic review7
Global work index by non-invasive pressure-strain loops: a novel parameter to assess left ventricular performance in the early stages of heart failure with preserved or mid-range ejection fraction aft6
Usefulness of lung ultrasound in the early identification of severe COVID-19: results from a prospective study6
Effectiveness of contrast-enhanced ultrasound for detecting the staging and grading of bladder cancer: a systematic review and meta-analysis6
Ultrasonography-guided botulinum toxin injection to the cricopharyngeus muscle: a case report and technical notes6
Recurrent pancreatic cancer patient treated by chemotherapy and focused ultrasound surgery. A case report6
Microwave ablation in the treatment of liver tumors. A better tool or simply more power?6
Preoperative Multiparametric Ultrasound and Fine Needle Aspiration Cytology evaluation of parotid gland tumors: which is the best technique?5
Evaluation of optimal education level to implement structured reporting into ultrasound training5
Musculoskeletal ultrasonography: ninety-nine reasons for physiatrists5
The role of ultrasonography in head and neck Non-Melanoma Skin Cancer approach: an update with a review of the literature5
Ultrasound in pediatric orbital cellulitis5
Safety and parents´ acceptance of ultrasound contrast agents in children and adolescents – contrast enhanced voiding urosonography and contrast enhanced ultrasound5
Three-dimensional periodontal investigations using a prototype handheld ultrasound scanner with spatial positioning reading sensor5
Ultrasound of the pleura in children, WFUMB review paper5
A sono-anatomical and cadaveric study of ultrasound-guided retrolaminar block5
Contrast-enhanced ultrasonography in the initial evaluation of the kidney graft function: a pilot study.5
Ultrasound of the chest and mediastinum in children, interventions and artefacts. WFUMB review paper (part 3)4
Measurement consistency of dynamic stretching muscle stiffness evaluated using shear wave elastography: comparison among different stretched levels and ROI sizes4
The role of intracardiac echocardiography in reducing radiation exposure during atrial fibrillation ablation4
Multiparametric ultrasound in torsion of the testicular appendages: a reliable diagnostic tool?4
Bosniak classification of cystic renal masses: utility of contrastenhanced ultrasound using version 20194
Colour Doppler imaging of retrobulbar circulation in different severity of glaucoma optic neuropathy4
Evaluation of characteristics of thyroid nodules on contrast-enhanced ultrasonography: a retrospective analysis of 252 cases4
Ultrasonography techniques in the preoperative diagnosis of parotid gland tumors – an updated review of the literature4
Increased carotid stiffness detected by ultrafast ultrasound imaging is associated with the Gensini score4
The diagnostic accuracy of ultrasound in the detection of foot and ankle fractures: a systematic review and meta-analysis4
Logistic models and artificial intelligence in the sonographic assessment of adnexal masses – a systematic review of the literature4
Various aspects of Contrast-enhanced Ultrasonography in splenic lesions – a pictorial essay4
Assessment of hepatic fat content in using quantitative ultrasound measurement of hepatic/renal ratio and hepatic echo-intensity attenuation rate4
Overview of the ultrasonography techniques in the diagnosis of appendicitis – elaboration of a novel anatomy scanning method4
Understanding the role of echocardiography in patients with obstructive sleep apnea and right ventricular subclinical myocardial dysfunction – comparison with other conditions affecting RV deformation3
Usefulness of real time elastography strain ratio in the assessment of cervical intraepithelial neoplasia and cervical cancer using a reference material3
The invasive intracoronary imaging assessment of left main coronary artery disease3
Imaging of calcific tendinopathy in atypical sites by ultrasound and conventional radiography: A pictorial essay3
Diagnosis of parotid gland tumours with Contrast-Enhanced Ultrasound: a systematic review and meta-analysis3
Contrast-enhanced ultrasound of adrenal hemorrhage: a helpful problem solving tool3
History of ultrasound in obstetrics and gynaecology from 1971 to 2021 on occasion of the 50 years anniversary of EFSUMB3
CEUS utility in the diagnosis of a stage I renal cancer developed on polycystic kidney. A case report.3
Impaired right ventricular filling in patients with a chronic coronary syndrome3
Lumbar medial branch cryoneurolysis under ultrasound guidance: initial report of five cases3
The role of elastography for liver fibrosis screening in alcoholic liver disease3
The association between jaw-opening strength, geniohyoid muscle thickness and echo intensity measured by ultrasound3
A prototype of a handheld augmented reality application to get familiar with ultrasound equipment knobology3
Factors influencing the Shear Wave Elastography evaluation of the patellar tendon3
Does lymph node morphology using ultrasound reflect aetiology? A pictorial essay, part II, malignant lymphadenopathy3
A quantitative grading system of vesicoureteral reflux by contrastenhanced voiding urosonography3
Diagnostic value of endobronchial ultrasound elastography for differentiating benign and malignant hilar and mediastinal lymph nodes: a systematic review and meta-analysis3
Lung ultrasound is useful in oncohematologic patients with respiratory dysfunction admitted to an Intensive Care Unit (ICU): a pilot study3
Liver stiffness increases in patients with severe pericardial effusion, especially in the presence of cardiac tamponade3
Contrast-enhanced ultrasound for the assessment of focal nodular hyperplasia – results of a multicentre study2
Developing and using a smartphone-app to support the teaching of technical basics for 3D/4D obstetrical ultrasound applications in medical education2
Ultrasonographic assessment of male anterior urethra. Description of the technique of examination and presentation of major pathologies.2
Clinical and ultrasound findings of hepatic sarcomatoid carcinoma2
Ultrasound as a complementary diagnostic method for Dupuytren’s Contracture2
Measurements of buccal gingival and alveolar crest thicknesses of premolars using a noninvasive method2
Diagnostic accuracy of ultrasonography for the confirmation of endotracheal tube intubation: a systematic review and meta-analysis2
Role of emergency chest ultrasound in traumatic pneumothorax. An updated meta-analysis2
Endoscopic ultrasound-guided fine needle aspiration for the diagnosis of bowel endometriosis: a case report2
Measurement of the anterior chamber depth and ocular axial length: transpalpebral B-mode ultrasound using an 18-MHz linear probe compared with the IOL Master 5002
Comparison of IOTA three-step strategy and logistic regression model LR2 for discriminating between benign and malignant adnexal masses2
An ultrasound study of the long posterior sacroiliac ligament in healthy volunteers and in patients with noninflammatory sacroiliac joint pain2
Visualization of the shear wave on gray-scale ultrasound: experience with a complex breast cyst2
A safer way of dry needling therapy for gastrocnemius muscles: ultrasound guidance2
Ultrasonography techniques in the preoperative diagnosis of parotid gland tumors – an updated review of the literature2
Fetal cardiac rhabdomyomas as a sonographic sign of tuberous sclerosis complex – a diagnosis not to be missed. A pictorial essay2
Ultrasonography-guided botulinum toxin injection for lumbrical muscle spasticity in a hemiplegic patient2
Effects of local anaesthetic dilution on the characteristics of ultrasound guided axillary brachial plexus block: a randomised controlled study2
Quantitative contrast-enhanced endoscopic ultrasound in pancreatic ductal adenocarcinoma and pancreatic neuroendocrine tumors: can we predict survival using perfusion parameters? A pilot study.2
Comments and illustrations of the WFUMB CEUS liver guidelines: rare congenital vascular pathology2
Assessment of Rectus Abdominis muscle thickness during isometric trunk and leg lifting exercises using extended field of view (EFOV) ultrasound2
Dynamic ultrasonography for assessing the nerve-fasciae relationship in entrapment syndromes2
The role of the ultrasound examination in atypical placental site trophoblastic tumour differential diagnosis and management. A case report2
Microvascular Doppler ultrasound in children with acute pyelonephritis2
Contrast-enhanced ultrasonography of the placental barrier; the protective umbrella of the fetus during pregnancy2
Comparison of the effects of adenosine, isoproterenol and their combinations on pulmonary transit time in rats using contrast echocardiography2
Ultrasound-guided caudal epidural injection in three simple steps2
Role of point-of-care ultrasound (POCUS) in the diagnosis of an abscess in paediatric skin and soft tissue infections: a systematic review and meta-analysis2
Contrast-enhanced ultrasound evaluation of testicular syphilis: a case report2
Value of Crystal Vue technique in detecting the placenta accreta spectrum located in c-section scar area2
The role of multimodal imaging in the diagnosis of an asymptomatic patient with congenital anomaly2
Cantrell syndrome in the first trimester of pregnancy: imagistic findings and literature review2
Translation of training to practice – ultrasound guided nerve block for analgesia in patients with hip fracture2
Diagnostic accuracy of transvaginal ultrasound examination for local staging of cervical cancer: a systematic review and meta-analysis2
The value of abdominal ultrasonography compared to colonoscopy and faecal calprotectin in following up paediatric patients with ulcerative colitis2
Heterotopic pancreas: the added value of endoscopic ultrasound with Computed Tomography for diagnosis2
Evaluation of the biomechanical properties of the posterior eye using Shear Wave Elastography in patients with increased intracranial pressure2
Clinical value of thoracic ultrasonography in the diagnosis of pulmonary embolism: a systematic review and meta-analysis2
Mammography and breast ultrasound analysis in male and female transgender persons using long-term gender affirming hormone therapy: a cross-sectional study in Brazil1
EFSUMB multidisciplinary guidelines and recommendations on the use of musculoskeletal ultrasound in clinical practice: what else?1
Liver fat quantification. What is the purpose?1
Extending and validating the Baveno VI criteria for the exclusion of high-risk varices1
A simplified ultrasound approach to diagnose testicular torsion and predict unsalvageable testis1
Effects of inflammation on the accuracy of ultrasound diagnosis of epidermoid cysts1
Advances in the application of Doppler ultrasonography in the newborn1
First trimester fetal heart evaluation. A pictorial essay1
Ultrasound versus physical examination in predicting disease flare in children with juvenile idiopathic arthritis: a systematic literature review and qualitative synthesis1
Intraoperative ultrasound in liver and pancreatic surgery1
Phantoms for ultrasound-guided vascular access cannulation training: a narrative review1
Comments and illustrations of the WFUMB CEUS liver guidelines: Rare benign focal liver lesion, part I1
Transthoracic ultrasound: an essential diagnostic tool in a very rare case of thoracic lymphangiomatosis1
Sonographic features of anterior chest wall lesions detected on breast sonography in women: A pictorial essay1
A.B.C. approach proposal for POCUS in COVID-19 critically ill patients1
Ultrasound and contrast-enhanced ultrasound imaging in hepatic epithelioid hemangioendothelioma: a retrospective study of 13 patients1
Noninvasive diagnosis of liver fibrosis in the complex cardiac malformation survivors – a review of the literature1
Cystic renal diseases: role of ultrasound. Part I, non-genetic cystic renal diseases1
Fetal “gallstones” are still an unsolved mystery. Case series.1
Application of three-dimensional ultrasonography (3D ultrasound) to pretreatment evaluation of plastic induration of the penis (Peyronie’s disease)1
Ultrasound Elastography: another piece in the puzzle of carotid plaque vulnerability?1
Ultrasound findings of Castleman’s disease of the parotid gland1
Occlusion of upper limb artery pseudoaneurysms with US-guided fibrin glue injection: a valid minimally invasive treatment option? Two case reports.1
Ultrasound Lumbar Spine Clinical Training Phantom: Which is the Best Embedding Medium?1
Sono-palpation and sono-Tinel in musculoskeletal ultrasound examination: use all “sono-senses”. A systematic review1
Sonography of Encapsulated Fat Necrosis with Histologic Correlation1
Ultrasound imaging and treatment in a rare case with bilateral supinator syndrome1
Is 3D ultrasound reliable for the evaluation of carotid disease? A systematic review and meta-analysis1
Education in Ultrasonography – when to start and when to stop1
Ultrasound-guided versus computed tomography-controlled periradicular injections of the first sacral nerve: a prospective randomized clinical trial1
The added value of CEUS and ultrasound-guided biopsy in diagnosing an aggressive desmoplastic small round cell tumour of peritoneum in a young male. A case report1
Ultrasound in non-tumoral pathology of the skin1
Comparison of Hystero-salpingography and Hysterosalpingo-Contrast Sonography for tubal patency testing: technical success, pain perception, side effects and complications1
Value of ovarian positional assessment on 4D hysterosalpingo-contrast sonography1
Comments and illustrations of the WFUMB CEUS liver guidelines: Rare focal liver lesions – non-infectious, non-neoplastic1
Imaging appearance of post umbilical venous catheter displacement: liver collections in children1
A modified ultrasound-guided supraclavicular brachial plexus block for the operative fixation of the humerus head and shaft fractures1
Transperineal ultrasound to assess anal positioning in female neonates1
Primary splenic leiomyosarcoma – case report and literature review1
ChatGPT-assisted deep learning model for thyroid nodule analysis: beyond artifical intelligence1
Ultrasonographic characteristics and outcome of Type III umbilical-portal-systemic venous shunt1
The role of advanced multimodality imaging in chronic mitral regurgitation1
Comparative study between two 2D-Shear Waves Elastography techniques for the non-invasive assessment of liver fibrosis in patients with chronic hepatitis C virus (HCV) infection1
Ultrasound imaging and guided intervention for the middle cluneal nerve1
Ultrasonography on the non-living. Current approaches.1
First trimester sonographic diagnosis of limb-body wall defect associating both cephalic and thoraco-abdominal defects – a case report and literature update1
Dynamic ultrasound imaging and guidance for pectoral nerve block in the management of arterial thoracic outlet syndrome1
A structured Endoscopic Ultrasound training program in Germany improves knowledge and competence1
Using 2-dimensional color superb microvascular imaging vascularization index technique in the assessment of thyroid surgical bed1
Does lymph node morphology using ultrasound reflect aetiology? A pictorial essay, part I1
Placental calcifications after coronavirus disease 2019 in first trimester of pregnancy: ultrasound and pathology findings1
Fetal axillary lymphangioma diagnosed on a 2D/4D ultrasound second trimester scan – a case report and short literature review1
Role of point of care ultrasound in COVID-19 pandemic: what lies beyond the horizon?1
Viscosity Plane-wave UltraSound (ViPLUS) in the assessment of parotid and submandibular glands in healthy subjects – preliminary results1
Dynamic changes and prognosis of pulmonary congestion by lung ultrasound in hemodialysis patients: a systematic review and meta-analysis1
Posterior wall puncture of internal jugular vein and inadvertent carotid artery cannulation1
Ultrasound guidance may be beneficial for localizing the atrophied muscles in electromyography1
Can the Vesical Imaging Reporting and Data System (VI-RADS) score be applied in conventional ultrasound and contrast-enhanced ultrasound to differentiate muscle-invasive bladder cancer?1
Ultrasound examination avoids tunnel vision: diagnosing a simple/painful (epi)dermal cyst1
Echocardiographic identification of right atrial mass: a case of cardiac angiosarcoma1
Cerebral hypoperfusion as assessed by transcranial duplex in posterior reversible encephalopathy syndrome1
Role of ultrasound in the diagnosis of very early-onset inflammatory bowel disease in children: a report of three cases1
Differences in the B-mode imaging quality of ultrasound devices in the mid-price segment1
WFUMB position paper. Incidental findings of the salivary glands1
Determining the effects of excess weight on renal cortical stiffness in children and adolescents with point Shear Wave Elastography1
Ultrasound examination for a heel scar: seeing/treating the painful superficial fascia1
Optic nerve sheath diameter measured by ultrasonography versus Magnetic Resonance Imaging for diagnosing increased intracranial pressure: a systematic review and meta-analysis1
Assessing forefoot bursitis in rheumatoid arthritis: a comprehensive approach with ultrasound, MRI, and baropodometry0
A case report of prenatal ultrasound diagnosis of a hiatal hernia in a fetus in the third trimester0
Accuracy of ultrasonography in detecting gastrointestinal tract obstructions in children; a prospective study in a tertiary referral hospital0
Learning curves in abdominal ultrasound in medical students0
Evaluation of the efficacy of gastric lymphoma treated with non-surgical therapy using oral and double contrast-enhanced gastric ultrasonography0
YouTube as a source of information and education on ultrasound- guided dry needling0
Ultrasonographic and pathological findings of a secretory carcinoma of the parotid gland0
Ultrasound guided interscalene brachial plexus block0
Transabdominal ultrasonography for confirmation of accurate percutaneous endoscopic gastrostomy tube placement: analysis of patient- and procedure-related complications0
Magnetic resonance/ultrasound fusion targeted biopsy of the prostate can be improved by adding systematic biopsy0
Echocardiography in the detection of lead-related infective endocarditis0
Comments and illustrations of the WFUMB CEUS liver guidelines: Rare vascular pathology, part II0
Feasibility of pneumoperitoneum diagnosis using point-of-care ultrasound: a pilot study using a fresh cadaver model0
Rare hand mass: malignant peripheral nerve sheath tumor0
Clinical and imaging findings of sarcomatoid renal cell carcinoma0
Contribution of shear wave elastography in evaluation of the deltoid in reverse shoulder arthroplasty: reproducibility study and preliminary results0
Transcatheter aortic valve implantation in a patient with interventricular membranous septal aneurysm resulted in cardiac tamponade of unclear etiology0
Normative values of the internal genital organs of the female pelvis in transvaginal and transabdominal ultrasound0
Ultrasound imaging for bladder hernia: a rare cause of female inguinal hernia0
A large-scale investigation by ultrasound of fetal hepatic venous system variants in China0
Comments and illustrations of the WFUMB CEUS liver guidelines: Rare focal liver lesion – infectious parasitic, fungus0
Systematic scrotum ultrasound in male infertility: what to look for0
The role of Contrast-Enhanced Ultrasound for evaluating renal perfusion dynamics in partially reversible acute cortical kidney ischemia in a patient with sepsis0
Perfluorobutane (Sonazoid) Contrast-enhanced ultrasound to diagnose hepatocellular carcinoma: A systematic review and meta-analysis0
Quantitative analysis of contrast-enhanced ultrasonography following living donor liver transplantation: early diagnosis of middle hepatic venous occlusion0
Multimodal ultrasonography evaluation in thyroid nodule characterization: what is the ideal algorithm?0
Mucosa-associated lymphoid tissue lymphoma of the parotid gland – a case report0
Comparison between combined ultrasounds and magnetic resonance imaging in the differentiation of benign and malignant breast lesions: a cross-sectional study0
Obtaining local twitch response with ultrasound-guided dry needling0
Embryonal rhabdomyosarcoma of the uterine cervix0
Multiparametric ultrasound evaluation of liver fibrosis, steatosis, and viscosity in patients with chronic liver disease0
Intramural ectopic pregnancy at 21 weeks of gestation0
An unusual complication of myocardial infarction0
Ultrasound surveillance on detection of nonpalpable supraclavicular recurrence after breast cancer surgery0
Imaging findings of a tall cell variant of papillary breast carcinoma0
Ultrasound and pathology findings of adenomyoepithelioma in the breast: a case report0
Diagnosing metatarsal chip fractures with ultrasound: faster and better0
Integrating ultrasound education and resources within undergraduate medical education in order to Bring Ultrasound Internationally for Long-term Development (BUILD)0
Clinical and imaging findings of invasive papillary carcinoma of the breast0
Plantar vein thrombosis: an unexpected cause of posttraumatic foot pain explained with ultrasound0
What happens under the flexor tendons of the fingers in dactylitis?0
Differential diagnosis of acute pulmonary embolism using contrast echocardiography0
Ultrasonographic imaging of supinator injury and hematoma after a fall0
Cardiac myxoma: benign, but deadly disease0
Ultrasonographic and pathological findings of syringocystadenoma papilliferum in the skin0
Evaluation of bowel preparation before colonoscopy by ultrasonographic monitoring of colonic fecal retention: a case series0
Heart, brain and neck integrated multimodal ultrasound revealed stroke etiology: carotid sub-web thrombus0
Quantitative time intensity curve analysis of contrast-enhanced ultrasound (CEUS) examinations for the assessment of focal liver lesions0
Difficulties in diagnosing HIV-associated nephropathy in kidney transplanted patients. The role of ultrasound and CEUS.0
A radiomics model based on transrectal ultrasound for predicting prostate cancer0
Portal venous gas detection in different clinical situations0
Ruptured primary omental ectopic pregnancy during the first trimester0
To publish an editorial – the Editor in Chief’s perspective0
Unusual echocardiographic finding as cause of acute coronary syndrome with ST- segment elevation0
Ultrasonography as a diagnostic tool for posteromedial corner pathologies: a pictorial essay0
Evaluation and subsequent treatment for superficial peroneal entrapment and hypertrophic scar using high-resolution ultrasound0
Flexor hallucis brevis’ trigger point and dry needling treatment: a myofascial pain syndrome perspective on big toe pain0
A rare cause of biliary obstruction – intraductal neuroendocrine tumor of the right hepatic biliary duct: a case report0
Doppler ultrasonographic evaluation of radial and ulnar artery diameters and blood flow, before and after percutaneous coronary interventions0
How easy is to perform a tendon SWE examination?0
Transesophageal endoscopic ultrasound fine needle aspiration of vertebral body osteolytic tumors – a novel diagnostic approach. Case series.0
Epidemiological estimates and early detection of polycystic kidney disease by ultrasonographic assessment in Japan0
An intrathyroidal nodule consisting of papillary thyroid cancer and ectopic hyperechoic parathyroid adenoma: a case report0
Ultrasound imaging and Fascial Manipulation® for rigid retinacula in two cases of complex regional pain syndrome0
Inter- and intraobserver reproducibility of Strain and 2D Shear Wave Elastography – a phantom study0
Umbilical artery aneurysm at 35 weeks of gestation0
Combination of ultrasound-guided percutaneous A1 pulley release and intra-tendon sheath injection improves the therapeutic outcomes in adult trigger finger patients0
Peritendinous effusion of the flexor hallucis longus tendon as a sign of ankle joint capsule injury0
Diagnostic value of the vascular index measured by superb microvascular imaging for evaluating breast tumors: a meta-analysis0
Clinical utilization of point-of-care ultrasound by junior emergency medicine residents0
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