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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.
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Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
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Related Experiment Video

Updated: Jul 4, 2025

Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
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A Holistic Approach to CT Protocol and Dose Management.

Emi Eastman1, Barry D Pressman2, Lynne Roy3

  • 1Medical Physicist Assistant, Department of Imaging, Cedars-Sinai Medical Center, Los Angeles, California.

Journal of the American College of Radiology : JACR
|January 29, 2024
PubMed
Summary
This summary is machine-generated.

This study presents a holistic approach to CT protocol and dose management, successfully reducing radiation exposure and improving alert efficiency. The implemented system effectively lowered radiation doses compared to established benchmarks.

Keywords:
ALARACT protocol and dose managementdose alertpatient size–dependent dose thresholdsprotocol reformat

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Area of Science:

  • Medical Imaging
  • Radiology
  • Radiation Dose Management

Background:

  • CT protocol and dose management face challenges due to scanner heterogeneity, patient size variation, and administrative hurdles.
  • Existing systems struggle with intelligent protocol mapping and patient-specific dose adjustments.
  • Effective management is crucial for optimizing radiation exposure in diagnostic imaging.

Purpose of the Study:

  • To present a holistic approach for overcoming challenges in CT protocol and dose management.
  • To implement and evaluate a system for intelligent protocol mapping and patient size-dependent dose thresholds.
  • To improve the efficiency and sustainability of CT dose management practices.

Main Methods:

  • Selected dose tracking software with intelligent protocol mapping and customizable dose thresholds.
  • Implemented a workflow including patient size-dependent dose alerts, a unified protocol archive, and prompt alert follow-up.
  • Iteratively updated thresholds based on protocol changes and dose statistics; evaluated using 11 protocols (N=148,678) against ACR's achievable dose (AD) and dose reference levels (DRLs).

Main Results:

  • 75th percentile doses were lower than ACR DRLs (average -4.9% to -36%).
  • Median doses ranged from -23% to 19% compared to ACR AD.
  • Unjustified dose alerts decreased from 80% to 17% over the study period, demonstrating improved alert accuracy.

Conclusions:

  • The holistic approach to CT protocol and dose management proved effective and sustainable.
  • The system demonstrated a prompt and positive impact on clinical practice.
  • This strategy offers a robust solution for optimizing radiation doses in CT imaging.