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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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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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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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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Adaptive Image Rescaling for Weakly Contrast-Enhanced Lesions in Dedicated Breast CT: A Phantom Study.

Bitbyeol Kim, Ho Kyung Kim, Jinsung Kim

    Taehan Yongsang Uihakhoe Chi
    |October 14, 2022
    PubMed
    Summary

    Adaptive image rescaling (AIR) in dedicated breast CT significantly enhances image contrast and quality over single-energy CT (SECT) and dual-energy CT (DECT). This technique shows promise for improving the detection of subtle lesions in breast imaging.

    Keywords:
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    Area of Science:

    • Medical Imaging
    • Radiology
    • Image Processing

    Background:

    • Dedicated breast CT offers volumetric X-ray imaging without compression.
    • Improving the detection of weakly enhanced lesions is crucial for diagnosis.
    • Adaptive image rescaling (AIR) is a novel technique proposed for breast CT.

    Purpose of the Study:

    • To evaluate the effectiveness of adaptive image rescaling (AIR) in improving image quality for dedicated breast CT.
    • To compare the performance of AIR with single-energy CT (SECT) and dual-energy CT (DECT).

    Main Methods:

    • Two phantom disks and a pork sample were scanned using SECT, DECT, and AIR protocols.
    • Image quality was assessed by measuring image contrast and contrast-to-noise ratio (CNR).
    • Statistical analysis using student's t-test was performed to confirm differences in imaging performance.

    Main Results:

    • AIR demonstrated significantly higher image contrast (318.2%) compared to SECT.
    • AIR achieved a 222.8% higher contrast-to-noise ratio (CNR) than DECT.
    • The subclinical study with pork yielded similar positive trends for AIR.

    Conclusions:

    • Adaptive image rescaling (AIR) offers superior image contrast over SECT.
    • AIR provides higher overall image quality compared to DECT, with reduced radiation exposure.
    • AIR holds significant potential for enhancing lesion detectability in dedicated breast CT examinations.