Influence of Ultra-Low-Dose and Iterative Reconstructions on the Visualization of Orbital Soft Tissues on Maxillofacial CT

Widmann, Gerlig; Juranek, D.; Waldenberger, Ferdinand; Schullian, Peter; Dennhardt, A.; Hörmann, Romed; Steurer, Michael; Gassner, Eva; Puelacher, Wolfgang

doi:10.3174/ajnr.a5239

Cited by 13 publications

(18 citation statements)

References 27 publications

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“…The decrease in SNR and CNR seems to maintain with the standalone use of the IR, raising the strength from one to five, after radiation dose reduction. A prior study also found that both adaptive statistical IR and model-based IR had a significantly better CNR than FBP for the optic nerve and inferior rectus muscle 18 . Other studies provided a potential for radiation dose reduction using an IR algorithm for soft tissue datasets of cranial CTs 19,20 .…”

Section: Discussionmentioning

confidence: 82%

Iterative reconstruction and deep learning algorithms for enabling low-dose computed tomography in midfacial trauma

Rozema

Kruitbosch

Minnen

et al. 2021

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

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Section: Discussionmentioning

confidence: 82%

Iterative reconstruction and deep learning algorithms for enabling low-dose computed tomography in midfacial trauma

Rozema

Kruitbosch

Minnen

et al. 2021

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

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“…Iterative Bildrekonstruktionen mit komplexen mathematischen Rechenmodellen verbessern die Bildqualität von dosisreduzierten Untersuchungen und zeigen in Abhängigkeit vom verwendeten Algorithmus und der klinischen Fragestellung eine mögliche Dosiseinsparung von bis zu 80 % [22]. Für die Zahn-und Kieferheilkunde konnten bereits folgende indikationsspezifische ALADA-CT-Dosen (CTDIvol) ermittelt werden: Trauma Mittelgesicht 2,6 mGy [23,24]; Implantologie mit Detektion und Messgenauigkeit des Mandibularkanals 1,74 mGy [25] bzw. lineare Messgenauigkeit des Implantatbetts 0,29 mGy [26,27]; Herstellung von CAD-Modellen 0,99 mGy [28]; und Computer-assistierte Chirurgie 0,76 mGy [29].…”

Section: Rechtfertigende Indikationunclassified

Röntgenstrahlenschutz kompakt

Widmann

Torbica

Verius

et al. 2020

Informationen aus Orthodontie & Kieferorthopädie

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ZusammenfassungZiel dieses Kurzreviews ist es, einen kompakten Überblick zum Thema Röntgenstrahlenschutz zu bieten. Für das Verständnis von Strahlenschutz sind Grundlagen der Physik der Röntgenstrahlung, ihrer biologischen Wirkung, sowie der Dosimetrie notwendig. Zu den deterministischen Gesundheitsrisiken zählen die Radiodermatitis und die posteriore, subkapsuläre Linsentrübung. Als stochastische Effekte werden eine mögliche Lebenszeit-attributable Risikoerhöhung von Krebserkrankungen v. a. für die erhöht strahlensensiblen Kinder und jungen Erwachsenen, sowie Frauen im gebärfähigen Alter diskutiert. Die EURATOM-Richtlinie 2013/59 verpflichtet alle EU-Mitgliedstaaten zu strenger rechtfertigender Indikationsstellung anhand wissenschaftlich basierter Guidelines, Anwendung und Review von diagnostischen Dosis Referenzwerten, sowie Dosismanagement unter Anwendung des „as low as reasonably achievable“ (ALARA) bzw. „as low as diagnostically acceptable“ (ALADA) Prinzips. Insbesondere Schnittbildgebung wie digitale Volumentomografie und Computertomografie erfordern durch die rasanten technischen Weiterentwicklungen zur Dosisreduktion einen kontinuierlichen, indikationsangepassten Optimierungsprozess von Untersuchungsprotokollen.

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“…The effective dose of a CBCT is known to be lower, ranging from 0.08 to 0.21 mSv on average, depending on the field of view that is used [34]. However, the effective dose of both a CT and CBCT can vary significantly based on a multitude of factors such as the system type, scan range, size of the patient and scan protocol parameters [25,34,36,39]. Hence, the interest in investigating whether physical examinations can be used to diagnose a fracture so as to reduce unnecessary imaging, health care costs and exposure to ionizing radiation [40,41].…”

Section: Introductionmentioning

confidence: 99%

Diagnostic accuracy of physical examination findings for midfacial fractures: a systematic review and meta-analysis

et al. 2022

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Objectives To conduct a systematic review and meta-analysis to assess the diagnostic accuracy of physical examination findings and related clinical decision aids for midfacial fractures in comparison to computed tomography and cone beam computed tomography. Material and methods A systematic review was performed by searching the MEDLINE, Cochrane, EMBASE, and CINAHL databases. Risk of bias was assessed using the Quality Assessment of Diagnostic Accuracy Studies-2 tool. Pooled sensitivity, specificity, and diagnostic odds ratios with the corresponding 95% confidence intervals were calculated for each physical examination finding and reported clinical decision aids. Results After screening 2367 records, 12 studies were included. High risk of patient selection bias was detected in three studies (25%). Additionally, high concerns regarding applicability were found for the patient selection in five studies (41.7%), and for the reference standard in eleven studies (91.7%). Of the total 42 individual physical examination findings, only 31 were suitable for a meta-analysis. High specificity and low sensitivity were found for most findings. The pooled diagnostic odds ratio ranged from 1.07 to 11.38. Clinical decision aids were reported by 8 studies, but none were constructed specifically for midfacial fractures. Conclusion Based on the current available evidence, the absence of physical examination findings can successfully identify patients who do not have a midfacial fracture, but the presence of individual findings does not necessarily mean that the patient has a midfacial fracture. Although various clinical decision aids were presented, none focused on exclusively midfacial fractures. Clinical relevance The diagnostic accuracy of physical examination findings can be used to diagnose a midfacial fracture so as to reduce unnecessary imaging, health care costs, and exposure to ionizing radiation.

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Influence of Ultra-Low-Dose and Iterative Reconstructions on the Visualization of Orbital Soft Tissues on Maxillofacial CT

Cited by 13 publications

References 27 publications

Iterative reconstruction and deep learning algorithms for enabling low-dose computed tomography in midfacial trauma

Iterative reconstruction and deep learning algorithms for enabling low-dose computed tomography in midfacial trauma

Röntgenstrahlenschutz kompakt

Diagnostic accuracy of physical examination findings for midfacial fractures: a systematic review and meta-analysis

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