scholarly journals Intraosseous contrast administration for emergency stroke CT

2021 ◽  
Author(s):  
Hermann Krähling ◽  
Max Masthoff ◽  
Wolfram Schwindt ◽  
Christian Paul Stracke ◽  
Philipp Schindler
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Acute Stroke ◽  
Ct Imaging ◽  
Contrast Administration ◽  
Ct Examination ◽  
Examination Protocol ◽  
First Case ◽  
Cannula Placement

AbstractComputed tomography (CT) imaging in acute stroke is an established and fairly widespread approach, but there is no data on applicability of intraosseous (IO) contrast administration in the case of failed intravenous (IV) cannula placement. Here, we present the first case of IO contrast administration for CT imaging in suspected acute stroke providing a dedicated CT examination protocol and analysis of achieved image quality as well as a review of available literature.

Comparison of COMPUTED TOMOGRAPHY Image Quality Using Intravenous vs. Intraosseous Contrast Administration in Swine

2015 ◽  
Vol 49 (5) ◽  
pp. 771-777 ◽  
Author(s):  
Jason Cohen ◽  
Luke Duncan ◽  
Wayne Triner ◽  
Jeffrey Rea ◽  
Gary Siskin ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Contrast Administration ◽  
Tomography Image ◽  
Computed Tomography Image

scholarly journals A Preliminary Study of Personalized Head CT Examination in Pediatric

2019 ◽  
Author(s):  
BingYang Bian ◽  
BoXu Zhou ◽  
Gang Wang ◽  
QingChen Zhou ◽  
ShuJia Xu ◽  
...  
Keyword(s):  
Image Quality ◽  
Head Circumference ◽  
Low Dose ◽  
Pediatric Patients ◽  
Conventional Group ◽  
Radiation Doses ◽  
Head Ct ◽  
Ct Examination ◽  
Examination Protocol ◽  
Group A

Abstract Background: Same head CT examination protocol was employed for pediatric patients who’s skull sizes are different , this could be excessive radiation doses because they usually have smaller head circumference. In our study, we investigate if mAs according to head circumference(HC) reduce radiation doses of sensitive organs including brain, eye lens and salivary glands, but could keep the image quality. Methods: 83 pediatric patients were prospectively selected. Without limiting the head circumference, 15 pediatrics were selected as conventional group by random number method and received routine head CT examination protocol (250mAs). Low-dose group including remaining 68 patients were divided into 3 subgroups based on HC: 54.1-57.0cm for group A(200mAs), 51.1-54.0cm for group B(150mAs), 48.1-51.0cm for group C(100mAs). The Image quality was assessed by subjective and objective image score. Radimetrics was used to calculate radiation doses of sensitive- organs. Results: In the conventional group, pediatric patients with smaller head circumference receive higher radiation doses of sensitive-organs. Radiation doses of brain and salivary glands were negatively correlated with HC. The radiation dose of sensitive-organs in 3 low-dose subgroups were significantly lower than conventional group. The subjective image quality scores in group A and B was no statistical different than conventional group. The SNR of thalamus and centrum ovale in low-dose subgroups were no statistical differences compared with conventional group. Conclusions: Our research indicates that personalized brain CT examination in pediatrics can reduce the radiation doses of sensitive-organs but keep image quality. HC can serve as an effective index to guide personalized head CT scan.

scholarly journals The Use of Artificial Intelligence in Computed Tomography Image Reconstruction: A Systematic Review

2020 ◽  
Vol 4 (2) ◽  
pp. 30-38
Author(s):  
Theresa Lee ◽  
◽  
Euclid Seeram ◽  
Keyword(s):  
Artificial Intelligence ◽  
Computed Tomography ◽  
Image Reconstruction ◽  
Image Quality ◽  
Low Dose ◽  
Ct Imaging ◽  
Clinical Implementation ◽  
Low Dose Ct ◽  
Dose Reductions

Background Current image reconstruction techniques in computed tomography (CT) such as filtered back-projection (FBP) and iterative reconstruction (IR) have limited use in low-dose CT imaging due to poor image quality and reconstruction times not fit for clinical implementation. Hence, with the increasing need for radiation dose reductions in CT, the use of artificial intelligence (AI) in image reconstruction has been an area of growing interest. Aim The aim of this review is to examine the use of AI in CT image reconstruction and its effectiveness in enabling further dose reductions through improvements in image quality of low-dose CT images. Method A review of the literature from 2016 to 2020 was conducted using the databases Scopus, Ovid MEDLINE, and PubMed. A subsequent search of several well-known journals was performed to obtain additional information. After careful assessment, articles were excluded if they were not obtainable from the databases or not available in English. Results This review found that deep learning-based algorithms demonstrate promising results in improving the image quality of low-dose images through noise suppression, artefact reduction, and structure preservation in addition to optimising IR methods. Conclusion In conclusion, with the two AI-based CT systems currently in clinical use showing favourable benefits, it is expected that AI algorithms will continue to proliferate and enable significant dose reductions in CT imaging.

Ultralow Dose CT Imaging for Navigated Skull Base Surgery Using ASIR and MBIR-2D and 3D Image Quality

2014 ◽  
Vol 75 (S 02) ◽  
Author(s):  
Gerlig Widmann ◽  
P. Schullian ◽  
R. Hoermann ◽  
E. Gassner ◽  
H. Riechelmann ◽  
...  
Keyword(s):  
Image Quality ◽  
Skull Base ◽  
Skull Base Surgery ◽  
Ct Imaging ◽  
3D Image ◽  
Ultralow Dose ◽  
2D And 3D

A Giant Coronary Sinus Aneurysm with Secondary Vena Cava Aneurysms

2016 ◽  
Vol 19 (1) ◽  
pp. 028
Author(s):  
Shengjun Wu ◽  
Peng Teng ◽  
Yiming Ni ◽  
Renyuan Li
Keyword(s):  
Computed Tomography ◽  
Heart Transplantation ◽  
Coronary Sinus ◽  
Unusual Case ◽  
Superior Vena ◽  
Vena Cava ◽  
Final Diagnosis ◽  
Rare Entity ◽  
First Case ◽  
Enhanced Computed Tomography

Coronary sinus aneurysm (CSA) is an extremely rare entity. Herein, we present an unusual case of an 18-year-old symptomatic female patient with a giant CSA. Secondary vena cava aneurysms were also manifested. The final diagnosis was confirmed by enhanced computed tomography (CT) and cardiac catheterization. As far as we know, it is the first case that such a giant CSA coexists with secondary vena cava aneurysms. Considering the complexity of postoperative reconstruction, we believe that heart transplantation may be the optimal way for treatment. The patient received anticoagulant due to the superior vena cava (SVC) thrombosis while waiting for a donor.

scholarly journals Self-navigated 3D whole-heart MRA for non-enhanced surveillance of thoracic aortic dilation: a comparison to CTA

2021 ◽  
Vol 22 (Supplement_1) ◽  
Author(s):  
P Poskaite ◽  
M Pamminger ◽  
C Kranewitter ◽  
C Kremser ◽  
M Reindl ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Aortic Aneurysm ◽  
Thoracic Aortic Aneurysm ◽  
Aortic Dilation ◽  
Subjective Image Quality ◽  
Contrast Enhanced ◽  
Whole Heart ◽  
Enhanced Computed Tomography ◽  
Contrast Enhanced Computed Tomography

Abstract Funding Acknowledgements Type of funding sources: None. Background The natural history of thoracic aortic aneurysm (TAA) is one of progressive expansion. Asymptomatic patients who do not meet criteria for repair require conservative management including ongoing aneurysm surveillance, mostly carried out by contrast-enhanced computed tomography angiography (CTA). Purpose To prospectively compare image quality and reliability of a prototype non-contrast, self-navigated 3D whole-heart magnetic resonance angiography (MRA) with contrast-enhanced computed tomography angiography (CTA) for sizing of thoracic aortic aneurysm (TAA). Methods Self-navigated 3D whole-heart 1.5 T MRA was performed in 20 patients (aged 67 ± 8.6 years, 75% male) for sizing of TAA; a subgroup of 18 (90%) patients underwent additional contrast-enhanced CTA on the same day. Subjective image quality was scored according to a 4-point Likert scale and ratings between observers were compared by Cohen’s Kappa statistics. Continuous MRA and CTA measurements were analyzed with regression and Bland-Altman analysis. Results Overall subjective image quality as rated by two observers was 1 [interquartile range (IQR) 1-2] for self-navigated MRA and 1.5 [IQR 1-2] for CTA (p = 0.717). For MRA a perfect inter-observer agreement was found for presence of artefacts and subjective image sharpness (κ=1). Subjective signal inhomogeneity correlated highly with objectively quantified inhomogeneity of the blood pool signal (r = 0.78-0.824, all p <0.0001). Maximum diameters of TAA as measured by self-navigated MRA and CTA showed excellent correlation (r = 0.997, p < 0.0001) without significant inter-method bias (bias -0.0278, lower and upper limit of agreement -0.74 and 0.68, p = 0.749). Inter- and intraobserver correlation of aortic aneurysm as measured by MRA was excellent (r = 0.963 and 0.967, respectively) without significant bias (all p ≤ 0.05). Conclusion Self-navigated 3D whole-heart MRA enables reliable contrast- and radiation free aortic dilation surveillance without significant difference to standardized CTA while providing predictable acquisition time and by offering excellent image quality. Abstract Figure.

scholarly journals Successful treatment of pyopneumothorax secondary to Streptococcus constellatus infection with linezolid: a case report and review of the literature

2020 ◽  
Vol 14 (1) ◽  
Author(s):  
Zhaorui Zhang ◽  
Binbin Xiao ◽  
Zhixin Liang
Keyword(s):  
Computed Tomography ◽  
Rare Event ◽  
Good Choice ◽  
Penicillin G ◽  
Computed Tomography Scan ◽  
Streptococcus Constellatus ◽  
First Case ◽  
Drug Sensitivity Test ◽  
Lung Condition ◽  
Tomography Scan

Abstract Background Pyopneumothorax secondary to Streptococcus constellatus infection is a clinically rare event, and few cases have been reported. Case presentation We report the case of a 55-year-old Han Chinese man with underlying diabetes who presented with fever of 17 days duration. A pulmonary computed tomography scan revealed right-sided massive pyopneumothorax. A culture of the pleural effusion and blood grew S. constellatus. A drug sensitivity test showed that the isolate was sensitive to linezolid, penicillin G, cefotaxime, vancomycin, and cefuroxime. Our patient was treated with linezolid for a total of 6 weeks. Subsequently, his chest computed tomography scan showed improved lung condition. Conclusion To the best of our knowledge, this is the first case of pyopneumothorax secondary to S. constellatus to be treated with linezolid. Pyopneumothorax may be caused by streptococcal infection, and linezolid is another good choice for treatment.

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