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Ideal Solutions02:24

Ideal Solutions

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According to Raoult’s law, the partial vapor pressure of a solvent in a solution is equal or identical to the vapor pressure of the pure solvent multiplied by its mole fraction in the solution. However, Raoult's Law is only valid for ideal solutions. For a solution to be ideal, the solvent-solute interaction must be just as strong as a solvent-solvent or solute-solute interaction. This suggests that both the solute and the solvent would use the same amount of energy to escape to the...
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General Properties of Solutions02:12

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Many common substances around us exist as a solution, such as ocean water, air, and gasoline. All solutions are mixtures of substances that are composed of varying amounts of two or more types of atoms or molecules. A mixture with a non-uniform composition is a heterogeneous mixture, whereas a mixture with a uniform composition is a homogeneous mixture. The components that make the homogeneous mixture are evenly spread out and thoroughly mixed. 
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Solution Formation02:16

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There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
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Enthalpy of Solution02:39

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Equation of Motion: General Plane motion01:22

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In the context of a rigid body's movement within a general plane, it is important to understand that this motion is typically triggered by external forces or couple moments exerted onto it. This principle can be explained through Newton's second law, which stipulates the translational motion of the body's center of mass along each axis.
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Hybridoma Technology01:31

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Hybridoma technology is used for the large-scale production of monoclonal antibodies. Monoclonal antibodies bind to only a single antigenic determinant or epitope. Such antibodies are used in research, diagnostics, and disease therapy. The hybridoma technology established in 1975 by Georges Köhler and Cesar Milstein was awarded the Nobel Prize in Medicine in 1984 for revolutionizing research and therapy.
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Implantation and Monitoring by PET/CT of an Orthotopic Model of Human Pleural Mesothelioma in Athymic Mice
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Motion Management in PET/CT: Technological Solutions.

Elena De Ponti1, Sabrina Morzenti1, Cinzia Crivellaro2,3

  • 1Medical Physics Department, San Gerardo Hospital, ASST-Monza, Italy.

Current Radiopharmaceuticals
|April 21, 2018
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Summary
This summary is machine-generated.

Managing patient breathing motion in PET/CT improves image quality and accuracy. This review covers key techniques like Respiratory Gating (RG) and Data Driven Gating (DDG) for better diagnostic and radiotherapy planning.

Keywords:
PET fieldPET/CT imagingRG protocolsRespiratory gatedbanana artefact managementdata driven gatingend expirationmotion free.

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Area of Science:

  • Medical Imaging
  • Nuclear Medicine
  • Radiotherapy Planning

Background:

  • Patient breathing causes motion artifacts in PET/CT scans, degrading image quality and quantitative accuracy.
  • Effective motion management is crucial for reliable PET/CT diagnostics and treatment planning.

Purpose of the Study:

  • To review and present the main technical solutions for managing respiratory motion in PET/CT imaging.
  • To highlight the benefits of motion management in improving image quality, quantification, and lesion detectability.

Main Methods:

  • Review of established techniques: Respiratory Gating (RG), Motion Free (MF), and End Expiration (EE) using LIST mode acquisition and external tracking devices.
  • Discussion of newer Data Driven Gating (DDG) techniques that correct motion without external tracking.
  • Mention of Banana Artefact Management (BAM) as a correction technique rather than a motion management protocol.

Main Results:

  • RG and DDG protocols yield sequences of 3D images reflecting organ and lesion movement.
  • MF and EE techniques produce single, motion-free 3D images, eliminating artifacts.
  • BAM corrects artifacts using CT-based attenuation maps, particularly in the diaphragm region.

Conclusions:

  • Motion management in PET/CT significantly enhances image quality, quantification, and lesion detection.
  • These techniques are valuable for both diagnostic imaging and radiotherapy planning, leading to improved patient outcomes.