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1. radiopaedia.org › articles › beam-hardeningBeam hardening | Radiology Reference Article | Radiopaedia.org

   radiopaedia.org › articles › beam-hardening

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   Jul 17, 2024 · Streak artifacts can sometimes be effectively reduced by increasing tube voltage (better penetration of high-density objects) or using a dual-energy imaging approach. Many modern scanners are also equipped with metal artifact reduction algorithms that utilize iterative reconstruction to limit beam hardening artifacts 3 .

2. aapm.onlinelibrary.wiley.com › doi › fullStreak artefact removal in x‐ray dark‐field computed ...

   aapm.onlinelibrary.wiley.com › doi › full

   Jul 16, 2024 · Reducing streak artifacts is essential for the optimization of image quality in DF CT, and artefact free images are a prerequisite for potential future clinical application. The purpose of this paper is to demonstrate the feasibility of CNN post-processing for artefact reduction in x-ray DF CT and how multi-rotation scans can serve as a pathway ...

   • Published: 16 July 2024

3. quizlet.com › 87563517 › ct-artifacts-flash-cardsCT Artifacts Flashcards | Quizlet

   quizlet.com › 87563517 › ct-artifacts-flash-cards

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   Jul 31, 2024 · Cone beam artifact. Associated with multi-row CT that collect >4 slices & only used simple back projection. Causes star like appearance at th periphery. Beam hardening. The ^ in average energy of the xray beam as it penetrates tissue. Study with Quizlet and memorize flashcards containing terms like Edge gradient effect, Edge gradient effect ...

4. radiopaedia.org › articles › radiological-imageRadiological image artifact | Radiology Reference Article ...

   radiopaedia.org › articles › radiological-image

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   Jul 18, 2024 · Artifact is also used to describe findings that are due to things outside the patient that may obscure or distort the image, e.g. clothing, external cardiac monitor leads, body parts of carer, etc. The commonest artifact seen in radiology is image noise, which is inherent to every modality and technique, and can be mitigated but never eliminated.

5. www.diagnosticimaging.com › view › polyenergeticCan Polyenergetic Reconstruction Help Resolve Streak ...

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   Jul 22, 2024 · Polyenergetic reconstruction can have a significant impact in addressing streak artifacts associated with photon counting computed tomography (PCCT), according to findings from a new study. For the study, recently published in Clinical Imaging, research compared monoenergetic and polyenergetic reconstruction techniques in a cohort of 50 ...

6. radiopaedia.org › articles › hrct-chestHRCT chest (protocol) | Radiology Reference Article ...

   radiopaedia.org › articles › hrct-chest

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   Jul 25, 2024 · streak artifacts are more apparent the patient radiation dose is higher. Fundamental technical protocols. slice thickness: 0.625-1.25 mm. scan time: 0.5-1 second. kV: 120. mAs: 100-200. collimation: 1.5-3 mm. matrix size: 768 x 768 or the largest available. FOV: 35 cm. reconstruction algorithm: high spatial frequency. window: lung window

7. People also ask

   What causes streak artifacts?

   • The other big issue that causes streak artifacts is something called Compton scatter. Basically, scatter causes X-ray photons to change direction and change energy. This means photons could end up in a different detector than they should be in.

   Correcting CT Scanner Artifacts: Streak Artifacts - Block Imaging

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   What is a streak artifact?

   • The name says it all: there’s a dark streak in the CT image and it usually appears between metal, bone, iodinated contrast, barium and other high-attenuation materials. But what causes it? It usually happens when the beam hardens and scatters. You’ll see bright streaks adjacent to dark ones.

   CT Scanner Artifacts- How Do I Correct Streaks? - Atlantis Worldwide

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   Where do streak artifacts occur?

   • Most streak artifacts occur near materials such as metal or bone, primarily as a result of beam hardening and scatter. These phenomena produce dark streaks between metal, bone, iodinated contrast, barium, and other high-attenuation materials. Bright streaks are seen adjacent to the dark streaks2.

   Correcting CT Scanner Artifacts: Streak Artifacts - Block Imaging

   info.blockimaging.com/correcting-ct-scanner-artifacts-streak-artifacts

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   What is an artifact in radiology?

   • Artifact is also used to describe findings that are due to things outside the patient that may obscure or distort the image, e.g. clothing, external cardiac monitor leads, body parts of carer, etc. The commonest artifact seen in radiology is image noise, which is inherent to every modality and technique, and can be mitigated but never eliminated.

   Radiological image artifact | Radiology Reference Article - Radiopaedia.…

   radiopaedia.org/articles/radiological-image-artifact?lang=gb

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8. aapm.onlinelibrary.wiley.com › doi › epdfStreak artefact removal in x‐ray dark‐field computed ...

   aapm.onlinelibrary.wiley.com › doi › epdf

   Jul 16, 2024 · CT images currently contain strong streak artifacts, as described in Section 2.2.16 Reduction of these streak artifacts is an important step in the further development and the goal of this work. Streak artifacts are actively studied in the field of conventional attenuation-based CT reconstruction, and typically arise from sparsely