Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Le Chatelier's Principle: Changing Volume (Pressure)02:32

Le Chatelier's Principle: Changing Volume (Pressure)

40.6K
For gas-phase equilibria, changes in the concentrations of reactants and products can occur with altered volume and pressure. The partial pressure, P, of an ideal gas is proportional to its molar concentration, M.
40.6K
Limiting Reactant02:27

Limiting Reactant

70.2K
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in reality, the reactants are not always present in the stoichiometric amounts indicated by the balanced equation.
70.2K
The Uncertainty Principle04:08

The Uncertainty Principle

32.7K
Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
32.7K
Hardy-Weinberg Principle01:49

Hardy-Weinberg Principle

76.5K
Diploid organisms have two alleles of each gene, one from each parent, in their somatic cells. Therefore, each individual contributes two alleles to the gene pool of the population. The gene pool of a population is the sum of every allele of all genes within that population and has some degree of variation. Genetic variation is typically expressed as a relative frequency, which is the percentage of the total population that has a given allele, genotype or phenotype.
76.5K
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

59.5K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
59.5K
The Number e as a Limit01:29

The Number e as a Limit

96
The number e is a fundamental constant in calculus, playing a central role in describing continuous change, particularly exponential growth. It is most naturally defined through its relationship with the natural logarithm, which is the inverse of the exponential function with base e. This relationship allows e to be characterized using basic principles of differentiation rather than as an arbitrary numerical constant.A key property of the natural logarithm function, ln x, is that its derivative...
96

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Stereotactic radiotherapy for spinal and non-spinal bone metastases: a patterns-of-care analysis in German-speaking countries as part of a project of the interdisciplinary Radiosurgery and Stereotactic Radiotherapy Working Group of the DEGRO/DGMP.

Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]·2025
Same author

Interobserver agreement on definition of the target volume in stereotactic radiotherapy for pancreatic adenocarcinoma using different imaging modalities.

Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]·2023
Same author

Vestibular Schwannoma Hypofractionated Stereotactic Radiation Therapy in Five Fractions.

Clinical oncology (Royal College of Radiologists (Great Britain))·2022
Same author

Prospective evaluation of CT-guided HDR brachytherapy as a local ablative treatment for renal masses: a single-arm pilot trial.

Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al]·2019
Same author

Search for resonant production of second-generation sleptons with same-sign dimuon events in proton-proton collisions at <math> </math>.

The European physical journal. C, Particles and fields·2019
Same author

The impact of local control on overall survival after stereotactic body radiotherapy for liver and lung metastases from colorectal cancer: a combined analysis of 388 patients with 500 metastases.

BMC cancer·2019
Same journal

Der Radiologe·2024
Same journal

Der Radiologe·2024
Same journal

Der Radiologe·2024
Same journal

Der Radiologe·2024
Same journal

Der Radiologe·2022
Same journal

Der Radiologe·2022
See all related articles

Related Experiment Video

Updated: Feb 8, 2026

Author Spotlight: Improving Radiation Therapy Access with Radiation Planning Assistant
05:18

Author Spotlight: Improving Radiation Therapy Access with Radiation Planning Assistant

Published on: October 6, 2023

2.0K

[Clinical target volume : Principles and limits].

T B Brunner1, M Walke2, P Hass2

  • 1Universitätsklinik für Strahlentherapie, Medizinische Fakultät, Otto-von-Guericke-Universität Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Deutschland. thomas.brunner@med.ovgu.de.

Der Radiologe
|June 28, 2018
PubMed
Summary
This summary is machine-generated.

Defining the clinical target volume (CTV) is crucial for radiotherapy planning. This overview clarifies CTV definition basics and challenges, aiding physicians in understanding radiological imaging needs for optimal treatment.

Keywords:
Cancer controlDiagnostic imagingPlanning techniquesRadiation oncologyRadiotherapy

More Related Videos

Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow
10:44

Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow

Published on: August 15, 2025

1.2K
Array Tomography Workflow for the Targeted Acquisition of Volume Information using Scanning Electron Microscopy
09:47

Array Tomography Workflow for the Targeted Acquisition of Volume Information using Scanning Electron Microscopy

Published on: July 15, 2021

5.4K

Related Experiment Videos

Last Updated: Feb 8, 2026

Author Spotlight: Improving Radiation Therapy Access with Radiation Planning Assistant
05:18

Author Spotlight: Improving Radiation Therapy Access with Radiation Planning Assistant

Published on: October 6, 2023

2.0K
Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow
10:44

Generating Whole Bacterial Genomes from Clinical Samples using a Target Enrichment Workflow

Published on: August 15, 2025

1.2K
Array Tomography Workflow for the Targeted Acquisition of Volume Information using Scanning Electron Microscopy
09:47

Array Tomography Workflow for the Targeted Acquisition of Volume Information using Scanning Electron Microscopy

Published on: July 15, 2021

5.4K

Area of Science:

  • Radiation Oncology
  • Medical Imaging
  • Radiotherapy Planning

Background:

  • The International Commission on Radiation Units and Measurements (ICRU) emphasizes the fundamental role of the clinical target volume (CTV) in radiotherapy planning.
  • Accurate CTV definition is essential for effective radiation delivery and treatment outcomes.

Purpose of the Study:

  • To provide a comprehensive overview of the fundamental principles and challenges associated with defining the CTV for radiotherapy planning.
  • To elucidate the radiological requirements necessary for optimal imaging in support of radiotherapy planning.

Main Methods:

  • A concise definition of CTV is presented.
  • The process for homogenizing CTV in intraindividual comparisons is described, with a focus on radiological requirements.
  • Information is systematically organized and presented in tables for clarity.

Main Results:

  • The CTV is identified as the most complex among the target volumes defined by the ICRU.
  • A survey of factors influencing the definition of CTV is provided.

Conclusions:

  • Understanding the basic rules for CTV definition enhances comprehension of radiological imaging needs in radiotherapy planning.
  • This knowledge is valuable for physicians across all specialties involved in radiotherapy.