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Related Concept Videos

Computed Tomography01:10

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

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Dual-phase Cone-beam Computed Tomography to See, Reach, and Treat Hepatocellular Carcinoma during Drug-eluting Beads Transarterial Chemo-embolization
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C-arm based cone-beam CT using a two-concentric-arc source trajectory: system evaluation.

Joseph Zambelli1, Tingliang Zhuang, Brian E Nett

  • 1Department of Medical Physics, University of Wisconsin-Madison, WI 53704.

Proceedings of Spie--The International Society for Optical Engineering
|April 22, 2009
PubMed
Summary
This summary is machine-generated.

Using two concentric x-ray arcs instead of one significantly reduces cone-beam artifacts in C-arm CT imaging. This novel trajectory improves image quality with simple implementation for better medical diagnostics.

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Area of Science:

  • Medical Imaging
  • Computed Tomography
  • Radiological Physics

Background:

  • C-arm based cone-beam CT (CBCT) commonly uses a single x-ray source arc trajectory.
  • Single arc trajectories result in cone-beam artifacts, degrading image quality for non-central regions.
  • Artifacts can impact diagnostic accuracy in various clinical applications.

Purpose of the Study:

  • To evaluate the preliminary performance of a novel two-concentric-arc x-ray source trajectory for C-arm CBCT.
  • To assess the impact of this new trajectory on image reconstruction and artifact reduction.
  • To compare image quality metrics between single-arc and two-arc trajectories.

Main Methods:

  • Utilized a GE Healthcare Innova 4100 C-arm system with a flat-panel detector.
  • Employed a reconstruction method summing FDK-type reconstructions from two individual concentric arcs (30° apart).
  • Compared reconstructed images from the two-arc trajectory against a single-arc trajectory.

Main Results:

  • The two-arc trajectory demonstrated a significant reduction in cone-beam artifact visibility compared to the single-arc trajectory.
  • The summation reconstruction method is a simple, direct extension of current commercial system methods.
  • Evaluated metrics included spatial resolution, low contrast resolution, noise, and artifact levels, showing improvements with the two-arc method.

Conclusions:

  • A two-concentric-arc x-ray source trajectory offers a promising approach to mitigate cone-beam artifacts in C-arm CBCT.
  • The proposed reconstruction method is practical for implementation due to its simplicity.
  • This technique has the potential to enhance diagnostic image quality in C-arm imaging procedures.