Comparison of Low- and Standard-Dose CT for the Diagnosis of Acute Appendicitis: A Meta-Analysis

Yun, Seong Jong; Ryu, Chang‐Woo; Choi, Na Young; Kim, Hyun Cheol; Oh, Ji Young; Yang, Dal Mo

doi:10.2214/ajr.16.17274

Cited by 65 publications

(56 citation statements)

References 24 publications

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“…A low dose CT approach (with 100 to 120 KvP and 25 to 30 mAs) has been demonstrated as accurate as the standard dose CT for the diagnosis of acute appendicitis [55,56]. A recent metaanalysis has confirmed this scenario [57]. The utility of multiplanar reconstructions has been validated [58].…”

Section: Exam Techniquementioning

confidence: 99%

“…If the patient is young and there is a trained operator, it is best to begin the assessment with US and then continue with a CT scan in case of doubt [68]. Many papers currently praise low-dose CT, reducing radiation doses by four fold (2 mSv vs 8mSv) with the same sensitivity and specificity as the standard CT and should be favored in these young patients [55][56][57][58][59]74]. In the context of pregnancy, before the advent of MRI in most major centers, some authors went so far as to propose CT when US was ineffective, provided that a targeted examination was performed.…”

Section: The Consequences Of Irradiationmentioning

confidence: 99%

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Imaging of Acute Appendicitis for Adult Patients

Dragean¹,

Passoglou²,

Danse³

et al. 2019

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Keywords: Appendix appendicitis ultrasonography computed tomography MRI A B S T R A C T Objectives: To describe the normal and pathological radiological appearance of the appendix in the adult patient using ultrasound (US), computed tomography (CT) and magnetic resonance imaging (MRI). Furthermore, to review the utility of the aforementioned imaging modalities in different clinical contexts. Summary: The diagnosis of an inflamed appendix based on clinical evaluation, biological data and crosssectional imaging. US is the first line technique to consider and is the modality of choice for children, young and thin patients and women of childbearing age. An inconclusive ultrasound examination should lead to the realization of a CT. The appearance of the normal and pathological appendix needs to be clarified, in view of the modern technological developments of US as well as on the basis of the new CT methods (multidetector CT, with or without dual energy, low-dose acquisition). CT examinations can be performed with or without intravenous injection of contrast medium, accompanied by oral or rectal opacification, with variable diagnostic performance depending on the thickness of the sections and the possible use of reconstructions. MRI remains the second most important examination for young patients and pregnant women. In view of such technical progress, the plain films of the abdomen no longer have a role in everyday practice. Conclusion:A better knowledge of the US and cross-sectional appearance (CT-MRI) of the normal or inflamed appendix should allow the radiologist to contribute to an optimal management of this very frequent acute clinical situation. This approach reduces unnecessary radiation and negative appendectomies and optimizes the health care expenditures.

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Section: Exam Techniquementioning

confidence: 99%

Section: The Consequences Of Irradiationmentioning

confidence: 99%

Imaging of Acute Appendicitis for Adult Patients

Dragean¹,

Passoglou²,

Danse³

et al. 2019

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“…Standardized reporting system of acute appendicitis using CT with developed for diagnosis of acute appendicitis in patients with abdominal pain (25)(26). Few studies discus the role of low-dose CT in assessment of patients with suspected acute appendicitis (30)(31)(32)(33). The unique of this study using low-dose 320-rows CT for diagnosis of acute appendicitis with standardized reporting system.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Standardized Reporting System of acute appendicitis in adults at low-dose 320-rows CT

Mahankali

Razek

abubacker

et al. 2019

Preprint

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Aim: To assess reliability of standardized reporting system of acute appendicitis at low-dose 320-rows CT. Methods: Retrospective analysis CT of 78 patients with pathologically proven acute appendicitis. The study was performed at low-dose 320-rows CT. The image analysis was performed by 2 radiologists according to standardized reporting system of acute appendicitis. Results: There was excellent overall of inter-observer agreement of both observers for standardized reporting system of acute appendicitis ( K = 0.89, 95% CI = 0.87-0.92, P = 0.001). There was good inter-observer agreement for visualization of appendix (K = 0.78, P = 0.001), tip diameter ( K = 0.75, P = 0.001), and single wall thickness of appendix ( K =0.77, P = 0.001). There was excellent inter-observer agreement for outer to outer wall diameter ( K = 0.82 , P = 0.001), mucosal hyper-enhancement ( K =0.80, P = 0.001), appendicolith ( K = 0.86, P = 0.001), gas in appendix ( K = 0.82, P = 0.001), surrounding fat stranding ( K = 0.81, P = 0.001), focal cecal thickening ( K = 0.85, P = 0.001), peri-appendiceal air ( K = 0.87, P = 0.001), peri-appendicular fluid collection, phlegmon, or abscess ( K = 0.82, P = 0.001), and right ovary cyst ( K = 0.83, P = 0.001). Conclusion: we concluded that excellent reliability of standardized reporting system of acute appendicitis in adults using low-dose 320-rows CT.

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“…In recent years, low-dose computed tomography (CT) technologies, such as limited-angle reconstruction algorithms, have been widely studied by researchers to reduce radiation damage in patients 1 . However, both conventional analytic CT algorithms, such as filtered backprojection (FBP) and the simultaneous algebraic reconstruction technique (SART), have limitations in dealing with this problem 2 .…”

Section: Introductionmentioning

confidence: 99%

Super-resolution CT Image Reconstruction Based on Dictionary Learning and Sparse Representation

Jiang

Zhang

Fan

et al. 2018

Sci Rep

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In this paper, a single-computed tomography (CT) image super-resolution (SR) reconstruction scheme is proposed. This SR reconstruction scheme is based on sparse representation theory and dictionary learning of low- and high-resolution image patch pairs to improve the poor quality of low-resolution CT images obtained in clinical practice using low-dose CT technology. The proposed strategy is based on the idea that image patches can be well represented by sparse coding of elements from an overcomplete dictionary. To obtain similarity of the sparse representations, two dictionaries of low- and high-resolution image patches are jointly trained. Then, sparse representation coefficients extracted from the low-resolution input patches are used to reconstruct the high-resolution output. Sparse representation is used such that the trained dictionary pair can reduce computational costs. Combined with several appropriate iteration operations, the reconstructed high-resolution image can attain better image quality. The effectiveness of the proposed method is demonstrated using both clinical CT data and simulation image data. Image quality evaluation indexes (root mean squared error (RMSE) and peak signal-to-noise ratio (PSNR)) indicate that the proposed method can effectively improve the resolution of a single CT image.

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Comparison of Low- and Standard-Dose CT for the Diagnosis of Acute Appendicitis: A Meta-Analysis

Abstract: Low-dose CT is highly effective for the diagnosis of suspected appendicitis and can be considered a valid alternative first-line imaging test that reduces the potential risk of exposure to ionizing radiation.

Cited by 65 publications

References 24 publications

Imaging of Acute Appendicitis for Adult Patients

Imaging of Acute Appendicitis for Adult Patients

Reliability of Standardized Reporting System of acute appendicitis in adults at low-dose 320-rows CT

Super-resolution CT Image Reconstruction Based on Dictionary Learning and Sparse Representation

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