scholarly journals Use of the Highly Biocompatible Au Nanocages@PEG Nanoparticles as a New Contrast Agent for In Vivo Computed Tomography Scan Imaging

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Yan Gao ◽  
Jian Kang ◽  
Zhen Lei ◽  
Yankun Li ◽  
Xifan Mei ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Contrast Agent ◽  
Computed Tomography Scan ◽  
Tomography Scan

scholarly journals Role of computed tomography scan in diagnosis of retroperitoneal masses

2020 ◽  
Vol 7 (5) ◽  
pp. 1461 ◽  
Author(s):  
Kiran Patel
Keyword(s):  
Computed Tomography ◽  
Cross Sectional Study ◽  
Retroperitoneal Mass ◽  
Computed Tomography Scan ◽  
Cross Sectional ◽  
Presenting Symptoms ◽  
Clinical Presentations ◽  
Malignant Lesions ◽  
Tomography Scan

Background: In the vast and ever-expanding field of surgery there are only few subjects which have provoked controversy; curiosity related to correct management of patients suffering from various condition of the abdomen. This becomes very true when the patient has a retroperitoneal mass clinically. The problem of retroperitoneal mass was intriguing, fascinating and certainly most perplexing. The present study was planned with the objective to study the various clinical presentations of retroperitoneal mass, and their radiological findings, and co-relation between these various findings.Methods: This was a prospective, cross-sectional study. The study included 30 patients clinically diagnosed having retroperitoneal mass, attending the department of general surgery.Results: The most common affected age group was of 40-50 years (9, 30.00%). The most frequent presenting symptoms were abdominal lump (28, 93.33%). Pallor was the commonest clinical sign (20, 66.67%). Retroperitoneal lymph node masses were the commonest (12, 40.00%) malignant lesions. Retroperitoneal lymphadenopathy was the most common lesion.Conclusions: The retroperitoneum has long been an area poorly visualised by conventional radiographic techniques and in this respect, computed tomography scan has great advantages over other modalities. Hence the modern surgeon should no longer be considered a ‘shadow-gazer' but an anatomist in-vivo.

scholarly journals Multiple Tracheal Diverticula in a COVID-19 Positive Patient

2021 ◽  
pp. 014556132110346
Author(s):  
Konstantinos Garefis ◽  
Konstantinos Tarazis ◽  
Konstantinos Gkiouzelis ◽  
Anastasia Kipriotou ◽  
Iordanis Konstantinidis ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Incidental Finding ◽  
Positive Patient ◽  
Computed Tomography Scan ◽  
Tracheal Diverticulum ◽  
Tomography Scan ◽  
Paratracheal Air Cyst

A tracheal diverticulum is a type of paratracheal air cyst and is usually an incidental finding after a computed tomography scan of the neck and thorax. With an incidence between 1% and 4% in adults, tracheal diverticula are rare entities that can be symptomatic in certain cases. We present a case of a COVID-19 positive patient who presented to our hospital and was diagnosed with multiple tracheal diverticula during his hospitalization.

scholarly journals Pulmonary coinfection of Mycobacterium tuberculosis and Tropheryma whipplei: a case report

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Binghua Zhu ◽  
Jing Tang ◽  
Rong Fang ◽  
Xuejie Fei ◽  
Qing Wang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Mycobacterium Tuberculosis ◽  
Next Generation Sequencing ◽  
Tropheryma Whipplei ◽  
Diagnostic Methods ◽  
Next Generation ◽  
Computed Tomography Scan ◽  
Chest Computed Tomography ◽  
Tomography Scan ◽  
Generation Sequencing

Abstract Background We diagnosed a clinical case of pulmonary infection involving Mycobacterium tuberculosis and Tropheryma whipplei in a patient with acute respiratory distress syndrome. The diagnosis was assisted by metagenomic next-generation sequencing of bronchoalveolar lavage fluid. Case presentation A 44-year-old Han Chinese inmate was transferred to the emergency department because of dry cough, chest tightness, and shortness of breath. The patient’s body temperature rose to 39.3 °C following empirical cephalosporin treatment for 1 week. The blood CD4+/CD8+ ratio was 0.7, suggesting immunodeficiency. Routine microbiological tests were performed, and tuberculosis interferon gamma release assays were positive. Mycobacterium tuberculosis polymerase chain reaction was also positive. Chest computed tomography scan revealed miliary nodules and ground-glass opacifications, which were in accordance with tuberculosis. To fully examine the etiology, we performed routine laboratory tests and metagenomic sequencing, the results of which indicated the presence of Mycobacterium tuberculosis and Tropheryma whipplei. We administered anti-tuberculosis regimen in combination with trimethoprim/sulfamethoxazole. The patient recovered, with chest computed tomography scan showing absorption of lesions. Conclusions Compared with traditional diagnostic methods such as culture and serology, metagenomic next-generation sequencing has the advantage of detecting a wide array of microorganisms in a single test and therefore can be used for clinical diagnosis of rare pathogens and microbial coinfections. It is particularly useful for immunocompromised patients as they are more prone to infection by opportunistic microorganisms.

Numerical assessment of natural respiration and particles deposition in the computed tomography scan airway with a glomus tumour

2021 ◽  
pp. 095440892110240
Author(s):  
Digamber Singh
Keyword(s):  
Computed Tomography ◽  
Respiratory Tract ◽  
Particle Deposition ◽  
Flow Characteristics ◽  
Glomus Tumour ◽  
Computed Tomography Scan ◽  
Human Respiratory Tract ◽  
Airflow Pattern ◽  
Human Airways ◽  
Tomography Scan

The human respiratory tract has a complex airflow pattern. If any obstruction is present in the airways, it will change the airflow pattern and deposit particles inside the airways. This is the concern of breath quality (inspired air), and it is decreasing due to the unplanned production of material goods. This is a primary cause of respiratory illness (asthma, cancer, etc.). Therefore, it is important to identify the flow characteristics in the human airways and airways with a glomus tumour with particle deposition. A numerical diagnosis is presented with an asymmetric unsteady-state light breathing condition (10 l/min). An in vitro human respiratory tract model has been reconstructed using computed tomography scan techniques and an artificial glomus tumour developed 2 cm above a carina on the posterior wall of the trachea. The transient flow characteristics are numerically simulated with a realizable (low Reynolds number) k–ɛ turbulence model. The flow disturbance is captured around the tumour, which influenced the upstream and downstream of the flow. The flow velocity pattern, wall shear stress and probable area of inflammation (hotspot) due to suspended particle deposition are determined, which may assist doctors more effectively in aerosol therapy and prosthetics of human airways illness.

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