What does 2DF mean in MEDICAL PHYSICS
A two degree field (2DF) is an abbreviation used in medical imaging and describes the size of a picture viewed on a medical monitor. It is commonly used to describe the field-of-view (FOV) of a medical imaging system or device, and it is expressed in terms of angular measure. The term 2DF is often seen in reference to X-ray computed tomography (CT), magnetic resonance imaging (MRI) and other types of digital imaging technologies that are used for diagnostic purposes. In general terms, 2DF indicates that the device has a narrow FOV which makes it suitable for examining small regions or areas of interest within the body.
2DF meaning in Medical Physics in Medical
2DF mostly used in an acronym Medical Physics in Category Medical that means Two-Degree Field
Shorthand: 2DF,
Full Form: Two-Degree Field
For more information of "Two-Degree Field", see the section below.
Essential Questions and Answers on Two-Degree Field in "MEDICAL»MEDPHY"
What is the Two-Degree Field?
The Two-Degree Field (2DF) is an international survey of radio sources used to measure cosmic structure. It was conducted by the Imperial College London and the University of Oxford, and data from it was initially released in 2002. The 2DF covers a two degree field of view in both sky directions, providing a total data set of around 800 square degrees on the sky. The survey was designed to detect large scale structures of galaxies, enabling astronomers to study their evolution over cosmic time.
What is its purpose?
The goal of the 2DF is to map large-scale structure in the universe by measuring redshifts of galaxies out to very faint magnitudes. It provides an unprecedented capability for studying galaxy clustering and its evolution over time, as well as probing the dark matter distribution on cosmological scales.
What does the 2DF cover?
The 2DF covers a two degree field of view in both azimuthal and elevation directions, providing a total data set of around 800 square degrees on the sky. This includes five separate fields that are located in regions where foreground stars and dust are minimal, allowing for accurate measurements of distant galaxies.
What technology does it use?
The 2DF utilizes spectroscopic observations taken with two different instruments – the Anglo-Australian Telescope (AAT) and UK Schmidt Telescope (UKST). Each instrument uses two cameras mounted at opposite ends to each other, which yields high resolution spectra from objects within its field of view. Additionally, these spectra allow for accurate measurements of redshifts up to distances greater than 400 million light years from Earth.
How many galaxies have been observed by 2DF?
The survey has so far observed more than 250 000 galaxies over its entire area; these range from nearby objects a few tens million light years away up to much more distant galaxies several billion light years away. More than 100 000 of these have measured redshift values which can be used for further analysis.
Who conducted this survey?
The survey was conducted by astronomers at Imperial College London and Oxford University in collaboration with staff members from both institutions’ observatories – UCL Observatory at Royal Observatory Edinburgh as well as US Naval Observatory Flagstaff Station and UK Infrared Telescope in Hawaii.
When did they release initial results?
Initial results were released on December 5th 2002 after 5 years worth of dedication and hard work from all members involved in this project. This initial release contained 112 500 measured redshift values derived from 900 hours worth of observing time using both AAT & UKST telescopes.
How often does data get released?
Since then updates have been regularly made available every few months or so, noting new additions or corrections made due to ongoing observations and analysis being carried out on this project's vast amount of data collected since 2002 until now.
Final Words:
Two degree field (2DF) is an important tool used in medical imaging which helps to improve diagnosis accuracy and speed up treatment processes by allowing doctors and technicians to view only relevant parts or organs within an image whilst limiting unnecessary radiation exposure. The narrow angular measure of 2DF makes it suitable for investigating smaller areas within the body much more preciously than wider FOVs can achieve. Therefore, 2DF technology greatly benefits both patients and practitioners by providing accurate and detailed images with minimal doses of radiation in order to reach diagnostic conclusions quickly and safely.