Related Experiment Video
Updated: Aug 31, 2025
08:30
X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
14.5K
Manual or auto-mode: Does this affect radiation dose in digital mammography without compromising image quality?
D Patidar1, L B C Yap2, H Begum1
1Health and Social Sciences, Singapore Institute of Technology, 10 Dover Drive, 138683, Singapore.
Radiography (London, England : 1995)
|August 22, 2022
Summary
Manual mammography techniques can reduce radiation dose in thicker breasts (6.0-6.5 cm) without compromising image quality. Auto-filter mode remains practical for thinner breasts (≤5.5 cm).
Area of Science:
- Radiological Physics
- Medical Imaging Technology
- Radiation Dosimetry
Background:
- Current screening mammography predominantly uses auto-filter exposure mode.
- Minimizing patient radiation dose is crucial due to known side effects.
- Optimizing exposure parameters is essential for safe mammography practices.
Purpose of the Study:
- To evaluate the impact of different mammography exposure modes (manual, auto-time, auto-filter) on radiation dose.
- To assess if diagnostic image quality is maintained across varying exposure modes.
- To identify potential dose-saving opportunities in mammography screening.
Main Methods:
- A Gammex 156 phantom with varying thicknesses (4.5-6.5 cm) was used to acquire 125 images.
- Mammographers assessed image quality based on visible details (fibers, masses, speck groups).
- Average glandular dose (AGD) was compared using Kruskal-Wallis H test and Dunn's post-hoc analysis for acceptable quality images.
Main Results:
- Significant AGD differences were observed between auto-filter and manual modes for 6.0 cm thickness (p < 0.05).
- Significant AGD differences were noted between auto-time and manual modes for 6.5 cm thickness (p < 0.05).
- No significant AGD differences were found for phantom thicknesses of 4.5, 5.0, and 5.5 cm.
Conclusions:
- Manual mode techniques offer potential radiation dose reduction for thicker breasts (6.0-6.5 cm).
- Auto-filter mode is a practical choice for thinner breasts (≤5.5 cm) due to comparable AGD.
- Further research on human subjects is recommended to validate these findings for clinical practice.
Related Concept Videos
01:24X-ray Imaging
6.4K
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...
6.4K
01:24Magnetic Resonance Imaging
6.1K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
6.1K
01:14Imaging Studies I: CT and MRI
423
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.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
423
02:59Biological Effects of Radiation
15.8K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
15.8K