27,478 results match your criteria American Journal Of Roentgenology[Journal]


A Comparison of Clinical and Chest CT Findings in Patients With Influenza A (H1N1) Virus Infection and Coronavirus Disease (COVID-19).

AJR Am J Roentgenol 2020 May 26:1-7. Epub 2020 May 26.

Department of Radiology, Second Xiangya Hospital, Central South University, Changsha, China.

The purpose of this study was to compare clinical and chest CT findings in patients with influenza A (H1N1) pneumonia and coronavirus disease (COVID-19) pneumonia. Thirty patients with diagnosed influenza A (H1N1) virus infection (group A) and 30 patients with diagnosed COVID-19 (group B) were retrospectively enrolled in the present study. The clinical characteristics and chest CT findings of the two groups were compared. Read More

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http://dx.doi.org/10.2214/AJR.20.23214DOI Listing

Nonmass Enhancement Breast Lesions: Diagnostic Performance of Kinetic Assessment on Ultrafast and Standard Dynamic Contrast-Enhanced MRI in Comparison With Morphologic Evaluation.

AJR Am J Roentgenol 2020 May 26:1-8. Epub 2020 May 26.

Department of Radiology, University of Chicago, Chicago, IL.

The purpose of this article was to evaluate the diagnostic performance of the kinetic parameters of ultrafast and standard dynamic contrast-enhanced MRI (DCE-MRI) compared with morphologic evaluation in differentiating benign from malignant nonmass enhancement (NME) breast lesions. A total of 77 consecutive patients with 77 NMEs (23 benign and 54 malignant) underwent 3-T MRI, including one unenhanced and eight contrast-enhanced ultrafast DCE-MRI scans (7-second scans) and standard DCE-MRI scans. The two readers evaluated the lesions' likelihood of malignancy on a continuous scale from 0 to 100% as the morphologic score using standard DCE-MRI. Read More

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http://dx.doi.org/10.2214/AJR.19.21920DOI Listing

Percutaneous Minimally Invasive Thermal Ablation of Osseous Metastases: Evidence-Based Practice Guidelines.

AJR Am J Roentgenol 2020 May 26:1-9. Epub 2020 May 26.

Mallinckrodt Institute of Radiology, St. Louis, MO.

The objective of this article is to describe evidence-based guidelines for percutaneous minimally invasive imaging-guided thermal ablation of bone metastases. Safe and effective minimally invasive thermal ablation can be performed to achieve pain palliation, local tumor control, or cure in selected subgroups of patients with osseous metastases. Thermal protection strategies should be implemented to minimize the risk of undesired thermal injury. Read More

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http://dx.doi.org/10.2214/AJR.19.22521DOI Listing

Utilization Trends in Abdominal Imaging, 2004-2016.

AJR Am J Roentgenol 2020 May 26:1-5. Epub 2020 May 26.

Department of Radiology, Center for Research on Utilization of Imaging Services, Thomas Jefferson University Hospital, 132 S 10th St, Ste 780-A Main, Philadelphia, PA 19107.

The purpose of this study was to analyze recent trends in abdominal imaging utilization in the Medicare population. Medicare Part B databases for 2004-2016 were reviewed, and all Current Procedural Terminology codes pertaining to noninvasive imaging of the abdomen and pelvis were identified. Codes were grouped into six categories: CT and CT angiography (CTA), MRI and MR angiography (MRA), ultrasound, radionuclide imaging, radiography, and gastrointestinal fluoroscopy. Read More

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http://dx.doi.org/10.2214/AJR.19.22524DOI Listing

CT Features of Coronavirus Disease (COVID-19) in 30 Pediatric Patients.

AJR Am J Roentgenol 2020 May 22:1-9. Epub 2020 May 22.

Department of Radiology, Massachusetts General Hospital, Boston, MA.

The purpose of this study is to characterize the CT findings of 30 children from mainland China who had laboratory-confirmed coronavirus disease (COVID-19). Although recent American College of Radiology recommendations assert that CT should not be used as a screening or diagnostic tool for patients with suspected COVID-19, radiologists should be familiar with the imaging appearance of this disease to identify its presence in patients undergoing CT for other reasons. We retrospectively reviewed the CT findings and clinical symptoms of 30 pediatric patients with laboratory-confirmed COVID-19 who were seen at six centers in China from January 23, 2020, to February 8, 2020. Read More

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http://dx.doi.org/10.2214/AJR.20.23145DOI Listing

Reorganizing Cross-Sectional Interventional Procedures Practice During the Coronavirus Disease (COVID-19) Pandemic.

AJR Am J Roentgenol 2020 May 22:1-5. Epub 2020 May 22.

Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA.

The purpose of this article is to present strategies and guidelines that can be implemented in the performance of cross-sectional interventional procedures during the coronavirus disease (COVID-19) pandemic. Radiologists who perform cross-sectional interventional procedures can take several steps to minimize the risks to patients and radiology personnel, including screening referred patients to decide which procedures can be postponed, using appropriate personal protective equipment (PPE), minimizing the number of people involved in procedures, preserving PPE when possible, and applying proper room and equipment cleaning measures. Read More

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http://dx.doi.org/10.2214/AJR.20.23227DOI Listing

Chest CT and Coronavirus Disease (COVID-19): A More Complete Review.

Authors:
Joseph B Fraiman

AJR Am J Roentgenol 2020 May 22:W1. Epub 2020 May 22.

Lallie Kemp Regional Medical Center, Independence, LA

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http://dx.doi.org/10.2214/AJR.20.23428DOI Listing

A Fond Farewell in Challenging Times.

AJR Am J Roentgenol 2020 Jun;214(6):1197-1198

Editor in Chief

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http://dx.doi.org/10.2214/AJR.20.23018DOI Listing

Rapid Deployment of Home PACS Workstations to Enable Social Distancing in the Coronavirus Disease (COVID-19) Era.

AJR Am J Roentgenol 2020 May 20:1-3. Epub 2020 May 20.

Department of Radiology, University of Alabama at Birmingham, 619 19th St S, JT N455E, Birmingham, AL 35249.

Social distancing is considered an effective mitigation strategy for coronavirus disease (COVID-19), and remote interpretation of radiologic studies is one approach to social distancing within the radiology department. We describe the rapid deployment of home workstations to achieve social distancing in the radiology department at the University of Alabama at Birmingham. Transitioning from on-site interpretation to remote interpretation requires a careful balancing of hospital and departmental finances, engineering choices, and educational and philosophical workflow issues. Read More

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http://dx.doi.org/10.2214/AJR.20.23495DOI Listing

MELD or Sodium MELD: A Comparison of the Ability of Two Scoring Systems to Predict Outcomes After Transjugular Intrahepatic Portosystemic Shunt Placement.

AJR Am J Roentgenol 2020 May 20:1-8. Epub 2020 May 20.

Department of Internal Medicine, Division of Gastroenterology, Hepatology, and Nutrition, University of Minnesota, Minneapolis, MN.

The purpose of this study was to compare the ability of the model for end-stage liver disease (MELD) and sodium MELD (MELD-Na) scoring systems to predict outcomes after transjugular intrahepatic portosystemic shunt (TIPS) placement. Two hundred and nineteen consecutive patients who underwent TIPS placement were retrospectively reviewed. The primary outcomes were death within 30 days and 90 days after TIPS placement (30- and 90-day mortality, respectively), and secondary outcomes included death within 365 days after TIPS placement (365-day mortality), length of hospital stay, and readmission to the hospital within 30 days of TIPS placement. Read More

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http://dx.doi.org/10.2214/AJR.19.21726DOI Listing

Delayed Isolation of Active Pulmonary Tuberculosis in Hospitalized Patients: A Pivotal Role of Radiologic Evaluation.

AJR Am J Roentgenol 2020 May 20:1-8. Epub 2020 May 20.

Department of Radiology, Soonchunhyang University Seoul Hospital, 59, Daesagwan-ro, Yongsan-gu, Seoul 04401, Republic of Korea.

The purpose of this study was to determine factors related to delayed isolation of patients hospitalized with active pulmonary tuberculosis (TB). A total of 130 immunocompetent hospitalized patients with active pulmonary TB who had positive sputum culture results from January 2015 to December 2017 were reviewed. Delayed isolation of pulmonary TB was defined as failure to initiate airborne isolation within the first 3 days of hospitalization. Read More

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http://dx.doi.org/10.2214/AJR.19.22540DOI Listing

New Arterial Phase Enhancing Nodules on MRI of Cirrhotic Liver: Risk of Progression to Hepatocellular Carcinoma and Implications for LI-RADS Classification.

AJR Am J Roentgenol 2020 May 20:1-8. Epub 2020 May 20.

Department of Radiology, NYU Langone Health, 660 1st Ave, New York, NY 10016.

The purposes of this study were to evaluate the outcome of new arterial phase enhancing nodules at MRI of cirrhotic livers, including clinical and imaging factors that affect progression to hepatocellular carcinoma (HCC), and to assess the diagnostic performance of Liver Imaging Reporting and Data System version 2018 (LI-RADSv2018) versus version 2017 (LI-RADSv2017) in categorizing these nodules. A database search identified 129 new arterial phase enhancing, round, solid, space-occupying nodules in 79 patients with cirrhosis who underwent surveillance MRI. Three readers assessed the nodules for LI-RADS findings and made assessments based on the 2017 and 2018 criteria. Read More

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http://dx.doi.org/10.2214/AJR.19.22033DOI Listing

Trends in Publicly Reported Quality Measures of Hospital Imaging Efficiency, 2011-2018.

AJR Am J Roentgenol 2020 May 20:1-6. Epub 2020 May 20.

Department of Diagnostic Radiology, Yale University School of Medicine, 20 York St, New Haven, CT 06510.

In 2011, the Centers for Medicare & Medicaid Services (CMS) initiated public reporting of outpatient imaging efficiency measures to reduce potentially inappropriate imaging and unnecessary exposure to ionizing radiation performed in hospital outpatient departments. Three CMS quality measures were designed to reduce duplicative CT in the Medicare population: OP-10, which CMS lists as "Abdomen Computed Tomography-Use of Contrast Material"; OP-11, which CMS lists as "Thorax CT-Use of Contrast Material"; and OP-14, which CMS lists as "Simultaneous Use of Brain CT and Sinus CT." We describe trends in hospital performance on these national hospital outpatient imaging efficiency measures since the inception of their public reporting. Read More

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http://dx.doi.org/10.2214/AJR.19.21993DOI Listing

Understanding the Lymphatics: Review of the N Category in the Updated TNM Staging of Cancers of the Digestive System.

AJR Am J Roentgenol 2020 May 20:1-11. Epub 2020 May 20.

Department of Radiology, Mercy Catholic Medical Center, 1500 Lansdowne Ave, Darby, PA 19023.

The N category has been significantly updated in the 8th edition of the American Joint Committee on Cancer's TNM classification. To ensure correct tumor staging, prognosis, and management, it is critical to be aware of these changes. This article reviews the updated N category, organ-specific regional lymph nodes, and lymphatic drainage pathways for cancers of the digestive system from the esophagus to the anal canal. Read More

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http://dx.doi.org/10.2214/AJR.19.22636DOI Listing

Grade 3 Pancreatic Neuroendocrine Tumors on MDCT: Establishing a Diagnostic Model and Comparing Survival Against Pancreatic Ductal Adenocarcinoma.

AJR Am J Roentgenol 2020 May 20:1-8. Epub 2020 May 20.

Department of Radiology, Second Affiliated Hospital, Zhejiang University School of Medicine, Jiefang Rd 88#, Hangzhou, 310009 China.

The purpose of this study is to establish a diagnostic model for differentiating grade 3 (G3) pancreatic neuroendocrine tumors (PNETs) from pancreatic ductal adenocarcinomas (PDACs) and to analyze survival outcomes. Twenty patients with G3 PNETs and 58 patients with PDACs confirmed by surgery or biopsy were retrospectively included. Demographic and radiologic information was collected. Read More

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http://dx.doi.org/10.2214/AJR.19.21921DOI Listing

Diagnostic Tools for Coronavirus Disease (COVID-19): Comparing CT and RT-PCR Viral Nucleic Acid Testing.

AJR Am J Roentgenol 2020 May 15:1-5. Epub 2020 May 15.

Department of Radiology and Biomedical Imaging, University of California at San Francisco, San Francisco, CA.

Multiple studies suggest CT should be a primary diagnostic tool for coronavirus disease (COVID-19) because they reported sensitivities with CT far superior to that of reverse transcriptase polymerase chain reaction (RT-PCR) testing. This review aimed to assess these reports and found chest CT to have a clinical utility that is limited, particularly for patients who show no symptoms and patients who are screened early in disease progression. CT has limited sensitivity for COVID-19 and a lower specificity than RT-PCR testing, and it carries a risk of exposing providers to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Read More

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http://dx.doi.org/10.2214/AJR.20.23418DOI Listing

Semiautomatic Segmentation and Radiomics for Dual-Energy CT: A Pilot Study to Differentiate Benign and Malignant Hepatic Lesions.

AJR Am J Roentgenol 2020 May 14:1-8. Epub 2020 May 14.

Department of Radiology, Massachusetts General Hospital and the Harvard Medical School, 75 Blossom Ct, Rm 248, Boston, MA 02114.

This study assessed a machine learning-based dual-energy CT (DECT) tumor analysis prototype for semiautomatic segmentation and radiomic analysis of benign and malignant liver lesions seen on contrast-enhanced DECT. This institutional review board-approved study included 103 adult patients (mean age, 65 ± 15 [SD] years; 53 men, 50 women) with benign (60/103) or malignant (43/103) hepatic lesions on contrast-enhanced dual-source DECT. Most malignant lesions were histologically proven; benign lesions were either stable on follow-up CT or had characteristic benign features on MRI. Read More

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http://dx.doi.org/10.2214/AJR.19.22164DOI Listing

Desmoplastic Fibroblastoma: An Uncommon Tumor With a Relatively Characteristic MRI Appearance.

AJR Am J Roentgenol 2020 May 14:1-6. Epub 2020 May 14.

American Institute for Radiologic Pathology, Silver Spring, MD.

We undertook this study to determine the radiologic features of desmo-plastic fibroblastoma. We reviewed available radiologic images for 29 pathologically confirmed desmoplastic fibroblastomas, including images from MRI, radiography, ultrasound (US), and CT. The patient population included 14 women and 15 men (mean age, 60 years; range, 23-96 years). Read More

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http://dx.doi.org/10.2214/AJR.19.22163DOI Listing

Breast Tissue Expander With Radiofrequency Identification Port: Assessment of MRI Issues.

AJR Am J Roentgenol 2020 May 14:1-6. Epub 2020 May 14.

Department of Radiology and Medicine, Keck School of Medicine, University of Southern California, 1500 San Pablo St, 2nd Fl, Los Angeles, CA 90033.

Breast tissue expanders with magnetic ports are MRI unsafe, preventing patients from benefiting from the diagnostic capabilities of MRI. A tissue expander was recently developed with a radiofrequency identification (RFID) port used for needle location and expansion that may be acceptable for a patient undergoing MRI. The purpose of this investigation was to evaluate MRI issues using standardized techniques and well-accepted methods for this tissue expander with RFID port. Read More

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http://dx.doi.org/10.2214/AJR.19.22492DOI Listing

Ultrasound and CT in the Diagnosis of Appendicitis: Accuracy With Consideration of Indeterminate Examinations According to STARD Guidelines.

AJR Am J Roentgenol 2020 May 14:1-6. Epub 2020 May 14.

Department of Diagnostic Radiology, Queen Elizabeth II Health Sciences Centre and Dalhousie University, 1276 S Park St, 3rd Fl, Halifax, NS B3H 2Y9, Canada.

The objective of our study was to determine the accuracy of ultrasound (US) and CT in diagnosing appendicitis at our institution while taking into account the number of indeterminate examinations in accordance with the Standards for Reporting Diagnostic Accuracy (STARD) guidelines. We retrospectively evaluated 790 patients who underwent US, CT, or both for evaluation of suspected appendicitis between May 1, 2013, and April 30, 2015. Patient characteristics and US and CT examination results were recorded. Read More

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http://dx.doi.org/10.2214/AJR.19.22370DOI Listing

Diagnostic Accuracy of Lateral Neck Radiography for Esophageal Foreign Bodies in Adults.

AJR Am J Roentgenol 2020 May 14:1-7. Epub 2020 May 14.

Department of Otolaryngology, Division of Head and Neck Surgery, Keelung Chang Gung Memorial Hospital, 20401 No. 222, Maijin Rd, Anle District, Keelung City 204, Taiwan.

The objective of our study was to evaluate the accuracy of signs on lateral neck radiography for the assessment of patients with suspected esophageal foreign bodies (FBs). This retrospective study was conducted of 235 adult patients between January 2012 and December 2017. Group 1 was composed of 95 patients with esophageal FBs, and group 2 was composed of 140 patients without esophageal FBs. Read More

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http://dx.doi.org/10.2214/AJR.19.21870DOI Listing

Percutaneous Intraductal Microwave Ablation of Malignant Biliary Strictures: Initial Experience.

AJR Am J Roentgenol 2020 May 14:1-7. Epub 2020 May 14.

Department of Radiology, Okan University Hospital, Aydınlı Cad 2, İstanbul, Tuzla 34947, Turkey.

Metallic stenting of malignant biliary strictures is the preferred method of palliation, because most patients present when the condition is inoperable. Most metallic stents, however, are occluded 6-8 months after deployment. Intraductal radiofrequency ablation has been used in previous studies to improve stent patency. Read More

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http://dx.doi.org/10.2214/AJR.19.21897DOI Listing

Development of Quality-Controlled Low-Dose Protocols for Radiography in the Neonatal ICU Using a New Mobile Digital Radiography System.

AJR Am J Roentgenol 2020 May 14:1-6. Epub 2020 May 14.

Department of Radiology, Seoul National University, Seoul Metropolitan Government Boramae Medical Center, Seoul, Korea.

The aim of this study was to develop a low-dose radiography protocol for the neonatal ICU (NICU) using a new mobile digital radiography system with advanced denoising image processing and to evaluate the noninferiority of that protocol. In this prospective randomized study, 40 neonates in the NICU underwent radiography of the thorax and abdomen with two different mobile radiography units: conventional technique on one unit (50 kV, 1.6 mAs, and no additional filtration) and a new technique on another unit (54 kV, 0. Read More

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http://dx.doi.org/10.2214/AJR.19.22269DOI Listing

Segmental Pulmonary Vascular Changes in COVID-19 Pneumonia.

AJR Am J Roentgenol 2020 May 8:W1. Epub 2020 May 8.

Government Medical College, Srinagar, India.

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http://dx.doi.org/10.2214/AJR.20.23443DOI Listing

Comparison of Clinical and Semiquantitative Cartilage Grading Systems in Predicting Outcomes After Arthroscopic Partial Meniscectomy.

AJR Am J Roentgenol 2020 May 6:1-7. Epub 2020 May 6.

Imaging Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195.

Cartilage loss on preoperative knee MRI is a predictor of poor outcomes after arthroscopic partial meniscectomy. The purpose of this study was to compare the ability to predict outcomes after arthroscopic partial meniscectomy with a clinically used modified Outerbridge system versus a semiquantitative MRI Osteoarthritis Knee Score system for grading cartilage loss. Patients who underwent preoperative knee MRI within 6 months of arthroscopic partial meniscectomy and who had outcomes available from the time of surgery and 1 year later were eligible for inclusion. Read More

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http://dx.doi.org/10.2214/AJR.19.22285DOI Listing

Combined Dual-Energy and Single-Energy Metal Artifact Reduction Techniques Versus Single-Energy Techniques Alone for Lesion Detection Near an Arthroplasty.

AJR Am J Roentgenol 2020 May 6:1-8. Epub 2020 May 6.

Imaging Institute, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195.

The purpose of this study was to compare a combined dual-energy CT (DECT) and single-energy CT (SECT) metal artifact reduction technique with a SECT metal artifact reduction technique for detecting lesions near an arthroplasty in a phantom model. Two CT phantoms with a cobalt chromium sphere attached to a titanium rod, simulating an arthroplasty, within a background of soft-tissue attenuation containing spherical lesions (range, 10-20 mm) around the head and stem of different attenuations from the background (range of attenuation, 10-70 HU) were scanned with a single CT scanner individually (unilateral) and together (bilateral) with the following three dose-equivalent techniques: the currently used clinical protocol (140 kVp, 300 Reference mAs); 100 kVp; and DECT (100 kVp and 150 kVp with a tin filter). Three radiologists reviewed the datasets to identify lesions. Read More

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http://dx.doi.org/10.2214/AJR.19.22084DOI Listing

Abdominal Applications of Pediatric Body MR Angiography: Tailored Optimization for Successful Outcome.

AJR Am J Roentgenol 2020 May 6:1-9. Epub 2020 May 6.

Department of Radiology and Biomedical Imaging, University of California San Francisco Benioff Children's Hospital, 1975 4th St C1758L, San Francisco, CA 94158.

The purpose of this article is to summarize current common techniques and indications for pediatric abdominopelvic MR angiography and strategies for optimizing them to achieve successful outcomes. We also discuss newer MR angiography techniques, including whole-body imaging and blood pool contrast agents, as well as various approaches to reducing the need for anesthesia in pediatric MRI. Pediatric body vascular imaging presents a unique set of challenges that require a tailored approach. Read More

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http://dx.doi.org/10.2214/AJR.19.22289DOI Listing

The Role of Breast MRI in Detecting Asymptomatic Recurrence After Therapeutic Mastectomy.

AJR Am J Roentgenol 2020 May 6:1-8. Epub 2020 May 6.

Department of Radiology and Biomedical Imaging, University of California, San Francisco, 1600 Divisadero St, Rm C-250, San Francisco, CA 94115.

MRI is not routinely used to screen for cancer recurrence after therapeutic mastectomy; however, data on this topic are sparse. We performed this study to determine the utility of breast MRI in detecting asymptomatic locoregional recurrence after therapeutic mastectomy. A retrospective record review identified all breast MRI studies performed in women who had undergone unilateral therapeutic mastectomy over a 6-year period (January 1, 2010, to January 1, 2016). Read More

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http://dx.doi.org/10.2214/AJR.19.21640DOI Listing

Causes and Rates of 30-Day Readmissions After Transjugular Intrahepatic Portosystemic Shunts.

AJR Am J Roentgenol 2020 May 6:1-7. Epub 2020 May 6.

Department of Radiology, Division of Vascular and Interventional Radiology, Beth Israel Deaconess Medical Center and Harvard Medical School, 1 Deaconess Rd, WCC 308, Boston, MA 02215.

The purpose of this study was to investigate the causes and rates of 30-day readmission after transjugular intrahepatic portosystemic shunt (TIPS) at a single liver transplant center. We reviewed 165 TIPS procedures performed between 2003 and 2013. After excluding patients who died during the index admission ( = 16), any readmission within 30 days of discharge was identified, and cause of readmission was determined. Read More

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http://dx.doi.org/10.2214/AJR.19.21732DOI Listing

The Spectrum of Rib Neoplasms in Adults: A Practical Approach and Multimodal Imaging Review.

AJR Am J Roentgenol 2020 May 6:1-13. Epub 2020 May 6.

Department of Radiology, Division of Cardiothoracic Imaging, Temple University Hospital, 3401 N Broad St, Philadelphia, PA 19140.

Adult neoplasms of the ribs are a heterogeneous group consisting of both benign and aggressive entities. Rib neoplasms have a variety of overlapping imaging features, with much of the imaging data disjointed across the musculoskeletal, thoracic, and oncologic imaging literature. Arrival at accurate diagnosis can therefore be quite challenging. Read More

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http://dx.doi.org/10.2214/AJR.19.21554DOI Listing

Cardiac MRI for Patients With Cardiac Implantable Electronic Devices.

AJR Am J Roentgenol 2020 May 6:1-8. Epub 2020 May 6.

Department of Radiology, Medical College of Wisconsin, Milwaukee, WI.

Patients with cardiac implantable electronic devices (CIEDs) require cardiac MRI (CMRI) for a variety of reasons. The purpose of this study is to review and evaluate the value and safety of CMRI for patients with in situ CIEDs. Late gadolinium enhancement CMRI is the reference standard for assessing myocardial viability in patients with ventricular tachycardia before ablation of arrhythmogenic substrates. Read More

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http://dx.doi.org/10.2214/AJR.19.21883DOI Listing

CT Findings of Upper Urinary Tract Lesions in IgG4-Related Disease: Comparison With Urothelial Carcinoma.

AJR Am J Roentgenol 2020 May 6:1-7. Epub 2020 May 6.

Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

IgG4-related disease is characterized by extensive infiltration of IgG4-positive plasma cells and fibrosis in various organs. The objective of this study is to investigate CT findings of IgG4-related lesions involving the upper urinary tract and compare them with those of urothelial carcinomas. This study reviewed pretreatment CT images of 13 consecutive patients with IgG4-related disease with upper urinary tract lesions and 80 consecutive patients with urothelial carcinomas. Read More

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http://dx.doi.org/10.2214/AJR.19.22192DOI Listing

Contrast-Enhanced CT for the Diagnosis of Acute Mesenteric Ischemia.

AJR Am J Roentgenol 2020 May 6:1-10. Epub 2020 May 6.

Department of Radiology, University Hospitals Paris Nord Val de Seine, Beaujon Hospital, AP-HP, 100 Blvd du Général Leclerc. 92118 Clichy, France.

The purpose of this article is to provide an overview of the diagnostic and prognostic roles of CT in the management of acute mesenteric ischemia. Acute mesenteric ischemia is defined as inadequate blood supply to the gastrointestinal tract resulting in ischemic and inflammatory injury. The prognosis is poor without treatment. Read More

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http://dx.doi.org/10.2214/AJR.19.22625DOI Listing

Can Chest CT Features Distinguish Patients With Negative From Those With Positive Initial RT-PCR Results for Coronavirus Disease (COVID-19)?

AJR Am J Roentgenol 2020 May 5:1-5. Epub 2020 May 5.

Department of Radiology, Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou 510180, China.

The purpose of this study was to explore the value of CT in the diagnosis of coronavirus disease (COVID-19) pneumonia, especially for patients who have negative initial results of reverse transcription-polymerase chain reaction (RT-PCR) testing. Patients with COVID-19 pneumonia from January 19, 2020, to February 20, 2020, were included. All patients underwent chest CT and swab RT-PCR tests within 3 days. Read More

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http://dx.doi.org/10.2214/AJR.20.23012DOI Listing

Atypical Imaging Findings in Leukemia With SARS-CoV-2 Infection.

AJR Am J Roentgenol 2020 Apr 30:W1-W2. Epub 2020 Apr 30.

Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China

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http://dx.doi.org/10.2214/AJR.20.23154DOI Listing

Infection Control for CT Equipment and Radiographers' Personal Protection During the Coronavirus Disease (COVID-19) Outbreak in China.

AJR Am J Roentgenol 2020 Apr 30:1-5. Epub 2020 Apr 30.

Department of Radiology, Shanghai Jiao Tong University Medical School Affiliated Ruijin Hospital, No. 197 Ruijin Er Rd, Shanghai 200025, China.

Because CT plays an important role in diagnosis, isolation, treatment, and effective evaluation of coronavirus disease (COVID-19), infection prevention and control management of CT examination rooms is important. We describe modifications to the CT examination process, strict disinfection of examination rooms, arrangement of waiting areas, and efforts to increase radiographers' awareness of personal protection made at our institution during the COVID-19 outbreak. In addition, we discuss the potential of using artificial intelligence in imaging patients with contagious diseases. Read More

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http://dx.doi.org/10.2214/AJR.20.23112DOI Listing

Pediatric SARS, H1N1, MERS, EVALI, and Now Coronavirus Disease (COVID-19) Pneumonia: What Radiologists Need to Know.

AJR Am J Roentgenol 2020 Apr 30:1-9. Epub 2020 Apr 30.

Department of Radiology, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA 02115.

The purpose of this article is to review new pediatric lung disorders-including disorders that have occurred in recent years years such as severe acute respiratory syndrome (SARS), swine-origin influenza A (H1N1), Middle East respiratory syndrome (MERS), e-cigarette or vaping product use-associated lung injury (EVALI), and coronavirus disease (COVID-19) pneumonia-to enhance understanding of the characteristic imaging findings. Although the clinical symptoms of SARS, H1N1, MERS, EVALI, and COVID-19 pneumonia in pediatric patients may be nonspecific, some characteristic imaging findings have emerged or are currently emerging. It is essential for radiologists to have a clear understanding of the characteristic imaging appearances of these lung disorders in pediatric patients to ensure optimal patient care. Read More

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http://dx.doi.org/10.2214/AJR.20.23267DOI Listing

CT Characteristics for Predicting Invasiveness in Pulmonary Pure Ground-Glass Nodules.

AJR Am J Roentgenol 2020 Apr 29:1-8. Epub 2020 Apr 29.

Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, 1 Youyi Rd, Yuanjiagang, Yuzhong District, Chongqing 40016, China.

The objective of our study was to investigate the differences in the CT features of atypical adenomatous hyperplasia (AAH), adenocarcinoma in situ (AIS), minimally invasive adenocarcinoma (MIA), and invasive adenocarcinoma (IA) manifesting as a pure ground-glass nodule (pGGN) with the aim of determining parameters predictive of invasiveness. A total of 161 patients with 172 pGGNs (14 AAHs, 59 AISs, 68 MIAs, and 31 IAs) were retrospectively enrolled. The following CT features of each histopathologic subtype of nodule were analyzed and compared: lesion location, diameter, area, shape, attenuation, uniformity of density, margin, nodule-lung interface, and internal and surrounding changes. Read More

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http://dx.doi.org/10.2214/AJR.19.22381DOI Listing

Radiologic Differentiation of Primary CNS Posttransplant Lymphoproliferative Disorder From Brain Metastasis.

AJR Am J Roentgenol 2020 Apr 29:1-8. Epub 2020 Apr 29.

Department of Pathology, University of Nebraska Medical Center, Omaha, NE.

Primary CNS posttransplant lymphoproliferative disorder (PTLD) may present as multiple contrast-enhancing intraaxial lesions, often with central necrosis and surrounding edema. This imaging appearance is similar to the pattern seen in brain metastases. The purpose of this study was to find differences in the radiologic features of primary CNS PTLD lesions and brain metastases. Read More

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http://dx.doi.org/10.2214/AJR.19.22056DOI Listing

Incidental Coronary Artery Calcification and Stroke Risk in Patients With Atrial Fibrillation.

AJR Am J Roentgenol 2020 Apr 29:1-7. Epub 2020 Apr 29.

Gill Heart and Vascular Institute, University of Kentucky, 900 S. Limestone St, CTW 326, Lexington, KY 40536.

Atrial fibrillation (AF) is a major risk factor for stroke. The CHADSVASc score is used to risk stratify patients, and the score includes known coronary artery disease (CAD) as a variable. The aim of this study was to assess if the presence of incidental coronary artery calcification (CAC), without known CAD, is associated with stroke independent of CHADS-VASc variables. Read More

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http://dx.doi.org/10.2214/AJR.19.22298DOI Listing

Gender Disparity in Industry Relationships With Academic Interventional Radiology Physicians.

AJR Am J Roentgenol 2020 Apr 29:1-8. Epub 2020 Apr 29.

Department of Radiology, Massachusetts General Hospital, Boston, MA.

Industry relationships drive technologic innovation in interventional radiology and offer opportunities for professional growth. Women are underrepresented in interventional radiology despite the growing recognition of the importance of diversity. This study characterized gender disparities in financial relationships between industry and academic interventional radiologists. Read More

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http://dx.doi.org/10.2214/AJR.19.22176DOI Listing

Use of Contrast Medium Volume to Guide Prophylactic Hydration to Prevent Acute Kidney Injury After Contrast Administration: A Meta-Analysis.

AJR Am J Roentgenol 2020 Apr 29:1-10. Epub 2020 Apr 29.

Department of Medical Imaging, Taipei Medical University, 252 Wu-Hsing St, Taipei City 110, Taiwan.

The purpose of this study was to determine whether contrast medium volume and method of administration and baseline estimated glomerular filtration rate influence the efficacy of prophylactic hydration for prevention of acute kidney injury after contrast administration. An online search of PubMed conducted on August 25, 2017, produced a total of 697 studies. After the reports were reviewed, nine were included in this study. Read More

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http://dx.doi.org/10.2214/AJR.19.22325DOI Listing

Convolutional Neural Networks in Predicting Nodal and Distant Metastatic Potential of Newly Diagnosed Non-Small Cell Lung Cancer on FDG PET Images.

AJR Am J Roentgenol 2020 Apr 29:1-6. Epub 2020 Apr 29.

Joint Department of Medical Imaging, Princess Margaret Cancer Centre, University Health Network, Mount Sinai Hospital and Women's College Hospital, University of Toronto, 610 University Ave, Ste 3-960, Toronto, ON, Canada M5G 2M9.

The purpose of this study was to assess, by analyzing features of the primary tumor with F-FDG PET, the utility of deep machine learning with a convolutional neural network (CNN) in predicting the potential of newly diagnosed non-small cell lung cancer (NSCLC) to metastasize to lymph nodes or distant sites. Consecutively registered patients with newly diagnosed, untreated NSCLC were retrospectively included in a single-center study. PET images were segmented with local image features extraction software, and data were used for CNN training and validation after data augmentation strategies were used. Read More

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http://dx.doi.org/10.2214/AJR.19.22346DOI Listing

Clinical Implementation of a Free-Breathing, Motion-Robust Dynamic Contrast-Enhanced MRI Protocol to Evaluate Pleural Tumors.

AJR Am J Roentgenol 2020 Apr 29:1-11. Epub 2020 Apr 29.

Department of Thoracic Surgery, Brigham and Women's Hospital, Harvard Medical School, MA.

The purpose of this study was to develop a motion insensitive clinical dynamic contrast-enhanced MRI (DCE-MRI) protocol to assess the response of pleural tumors in clinical trials. Thirty-two patients with pleura-based lesions were administered contrast material and imaged with gradient-recalled echo DCE-MRI sequence variants: either a traditional cartesian k-space acquisition (FLASH), a time-resolved imaging with stochastic trajectories acquisition (TWIST), or a radial stack-of-stars acquisition (radial) sequence in addition to other standard-of-care imaging sequences. Each image acquisition's sensitivity to motion was evaluated by comparing the motion of the thoracic border in 3D throughout the acquisition. Read More

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http://dx.doi.org/10.2214/AJR.19.21612DOI Listing

Reply to "Clinical Features and Chest CT Manifestations of Coronavirus Disease (COVID-19)".

Authors:
Wenjie Yang

AJR Am J Roentgenol 2020 Apr 28:W1. Epub 2020 Apr 28.

Shanghai Jiao Tong University Medical, School, Ruijin Hospital, Shanghai, China

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http://dx.doi.org/10.2214/AJR.20.23342DOI Listing

Reply to "Radiologic Findings of Coronavirus Disease (COVID-19): Clinical Correlation Is Recommended".

AJR Am J Roentgenol 2020 Apr 28:W1. Epub 2020 Apr 28.

Second Xiangya Hospital, Central South University, Quality Control Center, Changsha, China

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http://dx.doi.org/10.2214/AJR.20.23287DOI Listing
April 2020
2.731 Impact Factor

Reply to "Vascular Changes Detected With Thoracic CT in Coronavirus Disease (COVID-19) Might Be Significant Determinants for Accurate Diagnosis and Optimal Patient Management".

AJR Am J Roentgenol 2020 Apr 24:W1. Epub 2020 Apr 24.

Keck School of Medicine, University of Southern California, Los Angeles, CA

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http://dx.doi.org/10.2214/AJR.20.23339DOI Listing

Hallway Conversations in Physics.

AJR Am J Roentgenol 2020 May;214(5):W76-W77

Medical University of South Carolina, Charleston, SC.

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http://dx.doi.org/10.2214/AJR.19.22446DOI Listing

CT in Differentiating Complicated From Uncomplicated Appendicitis: Role of Dual-Energy CT.

AJR Am J Roentgenol 2020 May;214(5):W80

Vancouver General Hospital, Vancouver, BC, Canada.

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http://dx.doi.org/10.2214/AJR.19.22405DOI Listing

Reply to "CT in Differentiating Complicated From Uncomplicated Appendicitis: Role of DECT".

AJR Am J Roentgenol 2020 May;214(5):W81

Seoul National University Bundang Hospital, Seongnam, Korea

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http://dx.doi.org/10.2214/AJR.19.22449DOI Listing