Application of an advanced noise reduction algorithm for imaging of hands in rheumatic diseases: evaluation of image quality compared to standard-dose images

Ziegeler, Katharina; Siepmann, Stefan; Hermann, Sandra; Beck, Alexander; Lembcke, Alexander; Hamm, Bernd; Hermann, Kai

doi:10.1007/s00296-020-04560-1

Cited by 3 publications

(4 citation statements)

References 24 publications

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“…Under the condition that DHJ is equal to 0 and uhj is equal to 1, RHJ = SHJ means that sample j belongs to level h and the membership is 1. [8][9][10][11][12] 4. Conclusion To sum up, speech recognition, as a new input mode with high speed and automatization under the development of computer technology, is also an important basis for the future industry innovation and development to achieve automation.…”

Section: Relative Membership Methodsmentioning

confidence: 99%

Application of Fuzzy Mathematics Algorithm in Computer Speech Recognition

Zhou

2021

J. Phys.: Conf. Ser.

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Speech recognition, as one of the key artificial intelligence technologies in modern development, plays an important role in any aspect. However, there are still problems in practical application, such as poor anti-interference and low degree of perfection. Therefore, this paper aims at the content of existing computer speech recognition technology, grasps fuzzy mathematical algorithm, and analyzes how to use this algorithm to better study computer speech recognition.

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Section: Relative Membership Methodsmentioning

confidence: 99%

Application of Fuzzy Mathematics Algorithm in Computer Speech Recognition

Zhou

2021

J. Phys.: Conf. Ser.

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“…3 Erosions and cysts, representing damage, are best imaged by CT, CR, and MRI, and only some may be diagnosed by US due to limited access to many bone surfaces. Ziegeler et al 4 found that the application of the noise estimation based low-dose technology resulted in radiographs of comparable quality to standard-dose images, allowing for a reduction of radiation exposure by up to 50%. 4 High-resolution peripheral quantitative CT (HR-pQCT) remains a research tool, but its ability to provide information about the bone microstructure provided the most accurate detection of bone lesions.…”

Section: General Overview Of Imaging Features and Modalitiesmentioning

confidence: 99%

“…Ziegeler et al 4 found that the application of the noise estimation based low-dose technology resulted in radiographs of comparable quality to standard-dose images, allowing for a reduction of radiation exposure by up to 50%. 4 High-resolution peripheral quantitative CT (HR-pQCT) remains a research tool, but its ability to provide information about the bone microstructure provided the most accurate detection of bone lesions. 2 It offers high-resolution 3D imaging (typically 82 mm isotropic voxel size) of bone structure with a low radiation dose.…”

Section: General Overview Of Imaging Features and Modalitiesmentioning

confidence: 99%

Imaging update in inflammatory arthritis

Sudoł‐Szopińska

Giraudo

Oei

et al. 2021

Journal of Clinical Orthopaedics and Trauma

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Ultrasonography and magnetic resonance imaging have become important imaging modalities in rheumatological disorders next to standard radiography. Due to their ability to assess both morphological and functional changes they play a significant role in early diagnosis and treatment monitoring. This review presents the latest advancements in imaging of inflammatory arthritis with a focus on two main groups of rheumatic diseases: connective tissue diseases and spondyloarthritis. New developments related to peripheral and sacroiliac joints imaging are discussed, including Superb Micro Flow Imaging and Shear Wave Elastography in ultrasonography, as well as Whole Body MRI, quantitative MRI, and the recent advances in cartilage imaging in MRI, including T2-and T1p-mapping, and dGEMRIC. The role of emerging imaging techniques in the early diagnosis of inflammatory arthritis is discussed, including DECT, VIBE, BoneMRI, and pQCT.

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“… 15,16 Corresponding results have been reported from Ziegeler et al for rheumatic hand imaging and from Lee et al for chest X-rays. 17,18 …”

Section: Introductionmentioning

confidence: 99%

Clinical utility of postprocessed low-dose radiographs in skeletal imaging

Kolck

Ziegeler

Walter

et al. 2021

The British Journal of Radiology

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Objectives: Radiography remains the mainstay of diagnostic and follow-up imaging. In view of the risks and the increasing use of ionizing radiation, dose reduction is a key issue for research and development. The introduction of digital radiography and the associated access to image postprocessing have opened up new opportunities to minimize the radiation dosage. These advances are contingent upon quality controls to ensure adequate image detail and maintenance of diagnostic confidence. The purpose of this study was to investigate the clinical applicability of postprocessed low-dose images in skeletal radiography. Methods: In our study setting, the median radiation dose for full dose x-rays was 9.61 dGy*cm2 for pelvis, 1.20 dGy*cm2 for shoulder and 18.64 dGy*cm2 for lumbar spine exams. Based on these values, we obtained 200 radiographs for each anatomic region in four consecutive steps, gradually reducing the dose to 84%, 71%, 60 and 50% of the baseline using an automatic exposure control (AEC). 549 patients were enrolled for a total of 600 images. All x-rays were postprocessed with a spatial noise reduction algorithm. Two radiologists assessed the diagnostic value of the radiographs by rating the visualization of anatomical landmarks and image elements on a five-point Likert scale. A mean-sum score was calculated by averaging the two reader’s total scores. Given the non-parametric distribution, we used the Mann-Whitney U test to evaluate the scores. Results: Median dosage at full dose accounted for 38.4%, 48 and 53.2% of the German reference dose area product for shoulder, pelvis and lumbar spine, respectively. The applied radiation was incrementally reduced to 21.5%, 18.4% and 18.7% of the respective reference value for shoulder, pelvis and lumbar spine. Throughout the study, we observed an estimable tendency of superior quality at higher dosage in overall image quality. Statistically significant differences in image quality were restricted to the 50% dose groups in shoulder and lumbar spine images. Regardless of the applied dosage, 598 out of 600 images were of sufficient diagnostic value. Conclusion: In digital radiography image postprocessing allows for extensive reduction of radiation dosage. Despite a trend of superior image detail at higher dose levels, overall quality and, more importantly, diagnostic utility of low-dose images was not significantly affected. Therefore, our results not only confirm the clinical utility of postprocessed low-dose radiographs, but also suggest a widespread deployment of this advanced technology to ensure further dose limitations in clinical practice. Advances in knowledge: The diagnostic image quality of postprocessed skeletal radiographs is not significantly impaired even after extensive dose reduction by up to 20% of the reference value.

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Application of an advanced noise reduction algorithm for imaging of hands in rheumatic diseases: evaluation of image quality compared to standard-dose images

Cited by 3 publications

References 24 publications

Application of Fuzzy Mathematics Algorithm in Computer Speech Recognition

Application of Fuzzy Mathematics Algorithm in Computer Speech Recognition

Imaging update in inflammatory arthritis

Clinical utility of postprocessed low-dose radiographs in skeletal imaging

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