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Related Concept Videos

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...
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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 II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
Positron Emission Tomography01:29

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...

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Near Infrared Optical Projection Tomography for Assessments of &beta;-cell Mass Distribution in Diabetes Research
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Published on: January 12, 2013

Digital breast tomosynthesis: observer performance study.

David Gur1, Gordon S Abrams, Denise M Chough

  • 1Radiology Imaging Research, Department of Radiology, University of Pittsburgh, 3362 Fifth Ave., Rm. 223 FARP Bldg., Pittsburgh, PA 15213, USA. gurd@upmc.edu

AJR. American Journal of Roentgenology
|July 22, 2009
PubMed
Summary
This summary is machine-generated.

Digital breast tomosynthesis combined with full-field digital mammography significantly reduces recall rates in cancer-free patients. This advanced imaging technique shows potential for improving breast cancer screening efficiency.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Oncology

Background:

  • Full-field digital mammography (FFDM) is a standard breast imaging technique.
  • Digital breast tomosynthesis (DBT) offers advanced 3D imaging capabilities.
  • Comparing diagnostic performance of FFDM and DBT is crucial for optimizing breast cancer screening.

Purpose of the Study:

  • To compare the diagnostic performance of FFDM versus DBT in a retrospective observer study.
  • To evaluate the impact of different display modes on radiologist interpretation.
  • To assess recall rates and sensitivity for cancer detection.

Main Methods:

  • Retrospective analysis of 125 breast examinations (35 cancer, 90 no cancer).
  • Four display conditions: FFDM alone, 11 low-dose projections, DBT images, and combined FFDM+DBT.
  • Radiologists used BI-RADS scale and ROC paradigm; recall rates and interpretation times were measured.

Main Results:

  • Combined FFDM+DBT reduced recall rates by 30% for cancer-free examinations (p < 0.0001).
  • DBT alone showed a trend towards reduced recall rates (10%, p=0.09).
  • No substantial improvement in sensitivity was observed with DBT alone or combined with FFDM.

Conclusions:

  • Digital breast tomosynthesis, particularly in combination with FFDM, may significantly decrease unnecessary patient recalls.
  • This reduction in recall rates can enhance the efficiency of breast cancer screening programs.
  • Further research may be needed to confirm sensitivity improvements.