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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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

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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.
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Related Experiment Video

Updated: Apr 16, 2026

Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform
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CT radiation dose and iterative reconstruction techniques.

Atul Padole1, Ranish Deedar Ali Khawaja, Mannudeep K Kalra

  • 11 Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St, Founders-202, Boston, MA 02114.

AJR. American Journal of Roentgenology
|March 21, 2015
PubMed
Summary
This summary is machine-generated.

Optimizing CT radiation dose is crucial. Iterative reconstruction algorithms, alongside adjustments in tube current and potential (kV), can lower image noise and reduce radiation exposure, especially in CT angiography.

Keywords:
CT image qualityCT radiation doseiterative reconstruction techniquesoptimization

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Area of Science:

  • Medical Imaging
  • Radiology
  • Radiation Safety

Background:

  • CT radiation dose optimization is a significant concern in medical imaging.
  • Image quality in CT scans is influenced by the chosen reconstruction algorithm.
  • Iterative reconstruction algorithms offer a promising approach to reduce radiation dose by mitigating image noise.

Purpose of the Study:

  • To explore methods for optimizing CT radiation dose.
  • To evaluate the role of iterative reconstruction in dose reduction.
  • To investigate the impact of tube current and potential on dose optimization.

Main Methods:

  • Utilizing iterative reconstruction algorithms in CT imaging.
  • Adjusting tube current as a primary parameter for dose reduction.
  • Modulating tube potential (kV) in specific CT protocols like angiography and for pediatric patients.

Main Results:

  • Iterative reconstruction algorithms effectively reduce image noise, enabling lower radiation doses.
  • Tube current adjustment is a common and effective method for dose reduction.
  • Tube potential modulation, particularly in CT angiography and for smaller patients, contributes to dose optimization.

Conclusions:

  • Iterative reconstruction is a key technology for CT radiation dose optimization.
  • Combining iterative reconstruction with adjustments in tube current and potential enhances dose reduction strategies.
  • These methods are vital for improving patient safety in CT examinations.