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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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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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Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
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Introduction to the Sign Test01:10

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The sign test is an important tool in nonparametric statistics, offering a straightforward yet effective method for analyzing matched pairs, nominal data, or hypotheses concerning the median of a population. It transforms data points into positive or negative signs, avoiding the need for assumptions about data distribution and instead focusing on the direction of change. It is particularly valuable when data does not conform to the normal distribution requirements of many parametric tests. For...
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Sign Convention01:30

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When analyzing a beam subjected to various loads, it is crucial to understand the internal forces and moments generated within the structure. These internal forces can be broadly classified into normal forces, shear forces, and bending moments. To determine these forces and moments, we use the method of sections and apply a specific sign convention based on their direction and the side of the section being analyzed.
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Sign Test for Nominal Data01:12

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The sign test is a nonparametric method used to evaluate hypotheses about the median of a single sample or to compare the medians of two related samples. The sign test is particularly useful when dealing with nominal data, which includes distinct categories without an inherent order, such as names, labels, and preferences. Nominal data restricts statistical analysis to evaluating population proportions rather than mean or median values that require continuous data.
For example, consider a...
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Related Experiment Video

Updated: Jan 25, 2026

Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans
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Identifying Coronary Artery Calcification on Non-gated Computed Tomography Scans

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Haemoptysis with subtle computed tomography signs.

Anas Al Fahad1, Sylvia Worthy2, Stephen J Bourke1

  • 1Respiratory Medicine Dept, Royal Victoria Infirmary, Newcastle upon Tyne, UK.

Breathe (Sheffield, England)
|April 30, 2019
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Summary

This case study explores the diagnosis of a 70-year-old woman presenting with a chronic dry cough and occasional blood-tinged sputum. It highlights the diagnostic challenges and potential underlying conditions for such symptoms in elderly patients.

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Area of Science:

  • Pulmonology
  • Internal Medicine
  • Diagnostic Imaging

Background:

  • A 70-year-old female patient experienced a 6-month history of persistent dry cough.
  • The patient also reported intermittent episodes of minor haemoptysis (coughing up small amounts of blood).
  • This clinical presentation in an elderly individual necessitates a thorough diagnostic workup.

Purpose of the Study:

  • To investigate the potential causes of chronic dry cough and haemoptysis in a 70-year-old female patient.
  • To outline a diagnostic strategy for evaluating respiratory symptoms in geriatric populations.
  • To discuss differential diagnoses including infectious, inflammatory, and neoplastic conditions.

Main Methods:

  • A comprehensive medical history and physical examination were conducted.
  • Diagnostic imaging, including chest X-ray and potentially CT scan, was utilized.
  • Sputum analysis and bronchoscopy were considered as part of the investigation.

Main Results:

  • The diagnostic process aimed to identify the etiology of the patient's respiratory symptoms.
  • Findings from investigations guided the formulation of a differential diagnosis.
  • The specific results leading to a diagnosis are detailed within the full case study.

Conclusions:

  • The case underscores the importance of a systematic approach to diagnosing respiratory symptoms in the elderly.
  • Prompt and accurate diagnosis is crucial for effective management and improved patient outcomes.
  • Further investigation is warranted to confirm the underlying cause and initiate appropriate treatment.