scholarly journals Neumonía por COVID19: Valoración por imagen, lo básico [COVID19 pneumonia: Imaging evaluation, the basics]

2020 ◽  
Vol 42 (02) ◽  
Author(s):  
Rolando Reyna ◽  
Fernando Gutiérrez ◽  
Carlos Previgliano
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Global Health ◽  
Chest Radiography ◽  
Imaging Findings ◽  
Imaging Studies ◽  
Imaging Evaluation ◽  
Evolution Time ◽  
Halo Sign ◽  
Glass Pattern

Resumen<br />La pandemia de COVID-19 ha resultado en una emergencia de salud global. Los estudios de imagen utilizados en esta enfermedad son la radiografía de tórax (RX) y la tomografía computarizada (TC). Ambas modalidades tienen sus hallazgos descritos, pero no son específicos dado que muchas enfermedades pueden producir patrones similares, particularmente las neumonías virales. Los RX de tórax muestra hallazgos consistentes en opacidades alveolares las cuales son múltiples, periféricas, bilaterales y basales, mientras que la tomografía de tórax sus hallazgos más frecuentes son presencia de patrón en vidrio deslustrado, consolidaciones, engrosamiento septal, patrón en empedrado, dilatación bronquial y engrosamiento peri bronquial, broncograma, patrón de halo invertido y patrón de neumonía organizada. Los hallazgos por imagen dependen del tiempo de evolución de la enfermedad ya que en etapas tempranas puede ser normal tanto en la RX como la TC. El riesgo de trombo embolismo pulmonar es alto y más frecuente que en pacientes con COVID-19 negativo.<br /><br />Abstract<br />The COVID-19 pandemic has resulted in a global health emergency. The imaging studies used in this disease are chest radiography (CXR) and computed tomography (CT). Both imaging modalities findings have had their findings. These findings described are not specific since many diseases can produce similar patterns. CXR shows somewhat consistent findings consisting of alveolar opacities which are multiple, peripheral, bilateral and basal, while CT the most frequent findings are the presence of grounded glass pattern, consolidations, septal thickening, crazy paving pattern, bronchial dilation and peribronchial thickening, air bronchograms, inverted halo sign and organized pneumonia. Imaging findings depends on the evolution time of the disease since in the early stages both chest radiography and tomography may be normal. The risk for pulmonary embolism is high and more frequent than in patients with negative COVID-19.<br /><br />

scholarly journals Imaging evaluation of nonobstetric conditions during pregnancy: what every radiologist should know

2020 ◽  
Vol 53 (3) ◽  
pp. 185-194
Author(s):  
Ana Paula Campos Rocha ◽  
Rafael Lourenço Carmo ◽  
Rodolfo Ferreira Queiroz Melo ◽  
Daniel Nogueira Vilela ◽  
Orlando Silqueira Leles-Filho ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Review Article ◽  
Radiological Protection ◽  
Optimal Planning ◽  
Resonance Imaging ◽  
Imaging Studies ◽  
Imaging Evaluation ◽  
Ultrasound Computed Tomography ◽  
Missed Diagnosis

Abstract In recent decades, there has been a significant increase in the number of imaging examinations performed on pregnant patients. That increase has occurred across the various modalities, including ultrasound, computed tomography, and magnetic resonance imaging. However, little is known about the risks that these examinations generate for the mother and fetus, related to the use of ionizing radiation or the use of contrast media. When pregnant patients are submitted to imaging studies, the principles of protection established by the International Commission on Radiological Protection should always be respected, to avoid injury to the pregnant woman and the fetus. The potential deleterious effects on the fetus must be weighed against the damage caused by not performing an examination that is clearly indicated, given that a delayed or missed diagnosis can be even more harmful to the health of the mother and of the fetus itself. The purpose of this review article is to address concerns regarding the safety of imaging methods used during pregnancy, as well as to identify typical clinical situations that require decisions to be made about the indication and optimal planning of imaging examinations.

scholarly journals COVID-19 Associated Pneumonia

2021 ◽  
Vol 21 (1) ◽  
pp. e4-11
Author(s):  
Rashid S. Al-Umairi ◽  
Joukha Al-Kalbani ◽  
Saqar Al-Tai ◽  
Ahmed Al-Abri ◽  
Faiza Al-Kindi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Medical Imaging ◽  
Diagnostic Imaging ◽  
Chest Radiography ◽  
Lower Lobe ◽  
Imaging Findings ◽  
National Library ◽  
X Ray ◽  
X Ray Computed

Medical imaging, including chest radiography and computed tomography, plays a major role in the diagnosis and follow-up of patients with COVID-19 associated pneumonia. This review aims to summarise current information on this topic based on the existing literature. A search of the Google Scholar (Google LLC, Mountain View, California, USA) and MEDLINE® (National Library of Medicine, Bethesda, Maryland, USA) databases was conducted for articles published until April 2020. A total of 30 articles involving 4,002 patients were identified. The most frequently reported imaging findings were bilateral ground glass and consolidative pulmonary opacities with a predominant lower lobe and peripheral subpleural distribution.   KEYWORDS COVID-19; Viral Pneumonia; Diagnostic Imaging; X-Ray Computed Tomography; Radiography;Review.

scholarly journals Incidence and morphological characteristics of the reversed halo sign in patients with acute pulmonary embolism and pulmonary infarction undergoing computed tomography angiography of the pulmonary arteries

2019 ◽  
Vol 45 (1) ◽  
Author(s):  
Alexandre Dias Mançano ◽  
Rosana Souza Rodrigues ◽  
Miriam Menna Barreto ◽  
Gláucia Zanetti ◽  
Thiago Cândido de Moraes ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Pulmonary Embolism ◽  
Computed Tomography Angiography ◽  
Acute Pulmonary Embolism ◽  
Pulmonary Arteries ◽  
Lower Lobe ◽  
Pulmonary Infarction ◽  
Halo Sign ◽  
Reversed Halo Sign ◽  
The Right

ABSTRACT Objective: To determine the incidence of the reversed halo sign (RHS) in patients with pulmonary infarction (PI) due to acute pulmonary embolism (PE), detected by computed tomography angiography (CTA) of the pulmonary arteries, and to describe the main morphological features of the RHS. Methods: We evaluated 993 CTA scans, stratified by the risk of PE, performed between January of 2010 and December of 2014. Although PE was detected in 164 scans (16.5%), three of those scans were excluded because of respiratory motion artifacts. Of the remaining 161 scans, 75 (46.6%) showed lesions consistent with PI, totaling 86 lesions. Among those lesions, the RHS was seen in 33 (38.4%, in 29 patients). Results: Among the 29 patients with scans showing lesions characteristic of PI with the RHS, 25 (86.2%) had a single lesion and 4 (13.8%) had two, totaling 33 lesions. In all cases, the RHS was in a subpleural location. To standardize the analysis, all images were interpreted in the axial plane. Among those 33 lesions, the RHS was in the right lower lobe in 17 (51.5%), in the left lower lobe in 10 (30.3%), in the lingula in 5 (15.2%), and in the right upper lobe in 1 (3.0%). Among those same 33 lesions, areas of low attenuation were seen in 29 (87.9%). The RHS was oval in 24 (72.7%) of the cases and round in 9 (27.3%). Pleural effusion was seen in 21 (72.4%) of the 29 patients with PI and the RHS. Conclusions: A diagnosis of PE should be considered when there are findings such as those described here, even in patients with nonspecific clinical symptoms.

COVID 19, All a Radiologist Needs to Know: A Narrative Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Farzaneh Shobeirian
Keyword(s):  
Computed Tomography ◽  
Rna Viruses ◽  
Imaging Findings ◽  
Protective Measures ◽  
Infection Transmission ◽  
The World ◽  
Positive Sense ◽  
Global Concern ◽  
Interlobular Septal Thickening ◽  
Radiologic Characteristics

Background: Coronaviruses are non-segmented enveloped positive-sense single-strand RNA viruses, and COVID-19 is the seventh known coronavirus, infecting humans. Objective: As the COVID-19 continued to spread the world wildly, every radiologist or clinician needs to be familiar with its imaging findings. Methods: In this study, we reviewed available studies to provide a comprehensive statement on COVID-19 imaging findings. Results: Ground-glass opacities, linear opacities, interlobular septal thickening, consolidation, and Crazy-paving patterns are the most frequent findings in computed tomography (CT) of lungs in patients with COVID-19 pneumonia, which are mostly bilateral, multifocal, and peripheral. Staff needs to follow some rules to reduce infection transmission. Conclusion: COVID-19 pneumonia is a new global concern which has many unknown features. In this article, the radiologic characteristics of COVID-19 pneumonia are discussed. We also discussed appropriate protective measures that the radiology team should be aware of.

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