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Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

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 the...
X-ray Imaging01:24

X-ray Imaging

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 X-rays, and by 1900, X-ray was widely...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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...
Ultrasound I: Abdominal Ultrasonography01:20

Ultrasound I: Abdominal Ultrasonography

Introduction:
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...
Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
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...

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Related Experiment Video

Updated: Jul 17, 2026

Using Simulation Models to Train Clinicians in the Use of Point-of-Care Ultrasound
05:04

Using Simulation Models to Train Clinicians in the Use of Point-of-Care Ultrasound

Published on: August 9, 2024

First year radiology residents not taking call: will there be a difference?

William M Strub1, James L Leach, Jun Ying

  • 1Department of Radiology, University of Cincinnati, 234 Goodman Street ML 0761, Cincinnati, OH 45267, USA. williamstrub@hotmail.com

Emergency Radiology
|January 26, 2007
PubMed
Summary

First-year radiology residents had a higher discrepancy rate on overnight reads, but the difference was small. Many discrepancies were false positives, with follow-up imaging showing no abnormality.

Related Experiment Videos

Last Updated: Jul 17, 2026

Using Simulation Models to Train Clinicians in the Use of Point-of-Care Ultrasound
05:04

Using Simulation Models to Train Clinicians in the Use of Point-of-Care Ultrasound

Published on: August 9, 2024

Area of Science:

  • Radiology
  • Medical Education

Background:

  • Debate exists regarding first-year residents taking overnight calls.
  • Assessing resident experience level's impact on preliminary radiograph interpretations is crucial.

Purpose of the Study:

  • To analyze discrepancies in overnight resident preliminary reads of emergency department radiographs.
  • To determine if resident experience level influences interpretation accuracy.

Main Methods:

  • Prospective interpretation of 13,213 radiographs by residents overnight at a Level I Trauma Center.
  • Documentation of discrepancies by staff radiologists and examination of patient records for adverse outcomes.

Main Results:

  • An overall discrepancy rate of 0.9% (120/13,184) was observed.
  • First-year residents had a 1.59% discrepancy rate, higher than other residents (0.39-0.56%).
  • Follow-up imaging revealed 59.2% of discrepancies were false positives.

Conclusions:

  • While first-year residents show a higher discrepancy rate, the difference is marginal and its clinical significance is debatable.
  • A significant portion of discrepancies identified during overnight reads are false positives, as confirmed by follow-up imaging.