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Related Concept Videos

Imaging Studies III: Computed Tomography01:27

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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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Computed Tomography01:10

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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...
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Low-Dose Pelvic Computed Tomography Using Adaptive Iterative Dose Reduction 3-Dimensional Algorithm: A Phantom Study.

Hiromitsu Onishi1, Remko Kockelkoren, Tonsok Kim

  • 1From the *Department of Radiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan; †Faculty of Medical Sciences, University of Groningen, MWF-Complex, Groningen, the Netherlands, ‡Toshiba Medical Systems Corporation, Otawara-Shi, Tochigi, Japan; and §Division of Radiology, Department of Medical Technology, Osaka University Hospital, Suita, Osaka, Japan.

Journal of Computer Assisted Tomography
|July 1, 2015
PubMed
Summary
This summary is machine-generated.

Adaptive iterative dose reduction 3-dimensional (AIDR 3D) significantly enhances pelvic CT image quality. This technique reduces radiation dose while maintaining diagnostic performance, offering a promising approach for low-dose pelvic CT scans.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Dose Reduction

Background:

  • Pelvic CT scans are crucial for diagnosis but involve radiation exposure.
  • Optimizing image quality while minimizing radiation dose is a key challenge in CT imaging.

Purpose of the Study:

  • To assess the effectiveness of the adaptive iterative dose reduction 3-dimensional (AIDR 3D) algorithm for image quality and radiation dose reduction in pelvic CT.
  • To compare AIDR 3D with the standard filtered back projection (FBP) algorithm.

Main Methods:

  • Two phantom models were scanned using a 320-detector row CT scanner.
  • Images were reconstructed using both FBP and AIDR 3D algorithms across varying tube current levels.

Main Results:

  • AIDR 3D demonstrated a reduction in image noise and improved contrast-to-noise ratios compared to FBP.
  • Diagnostic performance of AIDR 3D images at 100 mA was comparable to FBP images at 200 mA.
  • Significant noise reduction and image quality improvement were observed with AIDR 3D.

Conclusions:

  • The AIDR 3D algorithm substantially improves pelvic CT image quality and reduces noise.
  • AIDR 3D is a promising technique for achieving low-dose pelvic CT examinations without compromising diagnostic efficacy.