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Atom that has excess nuclear energy, making it unstable
A radionuclide (radioactive nuclide, radioisotope, radioactive isotope, or unstable isotope) is a nuclide that is unstable and known to undergo radioactive
Radionuclide
Nuclear medicine imaging the ventricles of the heart
Radionuclide angiography is an area of nuclear medicine which specialises in imaging to show the functionality of the right and left ventricles of the
Radionuclide_angiography
Radionuclide formed by nucleosynthesis before formation of the Solar System
An extinct radionuclide is a radionuclide that was formed by nucleosynthesis before the formation of the Solar System, about 4.6 billion years ago, but
Extinct_radionuclide
Type of radiation therapy
Radionuclide therapy (RNT, also known as unsealed source radiotherapy or molecular radiotherapy) uses radioactive substances called radiopharmaceuticals
Radionuclide_therapy
wastewater or brine. These naturally occurring radionuclides are of more concern than some man-made radionuclides used in fracture monitoring because of their
Fracking_and_radionuclides
Situation in which the quantity of a radioactive isotope remains constant
only if the half-life of the daughter radionuclide B is much shorter than the half-life of the parent radionuclide A. In such a case, the decay rate of
Secular_equilibrium
Device for creating radionuclides
A radionuclide generator is a device which provides a local supply of a short-lived radioactive substance from the decay of a longer-lived parent radionuclide
Radionuclide_generator
Medical specialty
nuclear medicine. 2D: Scintigraphy ("scint") is the use of internal radionuclides to create two-dimensional images. A nuclear medicine whole body bone
Nuclear_medicine
Emissions from unstable atomic nuclei
than the age of the universe. The decaying nucleus is called the parent radionuclide (or parent radioisotope), and the process produces at least one daughter
Radioactive_decay
Nuclides predating the Earth's formation (found on Earth)
universe. They are the stable nuclides plus the fraction of the long-lived radionuclides surviving from the primordial solar nebula through planet accretion
Primordial_nuclide
Geochronological techniques for estimating length of time rock has been exposed
106 years. The most common of these dating techniques is cosmogenic radionuclide dating. Earth is constantly bombarded with primary cosmic rays, high
Surface_exposure_dating
Type of radiotherapy
Peptide receptor radionuclide therapy (PRRT) is a type of radionuclide therapy, using a radiopharmaceutical that targets peptide receptors to deliver
Peptide receptor radionuclide therapy
Peptide_receptor_radionuclide_therapy
Nuclide that does not undergo radioactive decay
radionuclide Cadmium-114 (2B)* Cadmium-116 (2B) – long-lived primordial radionuclide Indium-113 Indium-115 (B) – long-lived primordial radionuclide Tin-112
Stable_isotope
A radionuclide identification device (RID or RIID) is a small, lightweight, portable gamma-ray spectrometer used for the detection and identification of
Radionuclide identification device
Radionuclide_identification_device
Medical imaging technique
injection of a radiopharmaceutical with a positron or gamma emitting radionuclide and a prostate-specific membrane antigen (PSMA) targeting ligand. After
PSMA_scan
Activity per unit mass of a radionuclide
(symbol a) is the activity per unit mass of a radionuclide and is a physical property of that radionuclide. It is usually given in units of becquerel per
Specific_activity
Tumors of the endocrine and nervous systems
surgery, systemic treatments such as chemotherapy and peptide receptor radionuclide therapy, and others. Treatments may be aimed at curing the disease or
Neuroendocrine_tumor
Method of utilizing water in magnetic resonance imaging
pre-hospital Radionuclide 2D/scintigraphy Cholescintigraphy Scintimammography Ventilation/perfusion scan Radionuclide ventriculography Radionuclide angiography
Diffusion-weighted magnetic resonance imaging
Diffusion-weighted_magnetic_resonance_imaging
Federal and state nuclear regulatory agencies keep records of the radionuclides used. As of 2003 the isotopes Antimony-124, argon-41, cobalt-60, iodine-131
Uses of radioactivity in oil and gas wells
Uses_of_radioactivity_in_oil_and_gas_wells
Radiologic sign
by Fred Mishkin and Mark Dyken, who reported marked nasal activity on radionuclide angiograms in patients with anatomical or functional occlusion of one
Hot_nose_sign
employees to particles containing increased levels of alpha emitting radionuclides that could pose health risks if inhaled or ingested. NORM is found in
Naturally occurring radioactive material
Naturally_occurring_radioactive_material
Radionuclides which emit gamma radiation are valuable in a range of different industrial, scientific and medical technologies. This article lists some
Commonly used gamma-emitting isotopes
Commonly_used_gamma-emitting_isotopes
Biodecontamination of sites affected by radioactivity
Bioremediation of radioactive waste or bioremediation of radionuclides is an application of bioremediation based on the use of biological agents bacteria
Bioremediation of radioactive waste
Bioremediation_of_radioactive_waste
Atoms or particles produced by nuclear fission
is not produced directly by the fission event itself. The produced radionuclides have varying half-lives, and therefore vary in radioactivity. For instance
Nuclear_fission_product
Nuclear medicine tomographic imaging technique
required. The technique needs delivery of a gamma-emitting radioisotope (a radionuclide) into the patient, normally through injection into the bloodstream. On
Single-photon emission computed tomography
Single-photon_emission_computed_tomography
Element whose atomic number is greater than 92
Transuranium elements in the periodic table Z > 92 (U) The transuranium (or transuranic) elements are the chemical elements with atomic number greater
Transuranium_element
medical uses, or otherwise. Each group of radionuclides, starting with the longest-lived primordial radionuclides, is sorted by decreasing half-life, but
List_of_nuclides
1979 undeclared nuclear explosion
Hotel satellite, further meteorological satellite, hydroacoustic, and radionuclide data support the event's identification as an atmospheric nuclear explosion
Vela_incident
1986 nuclear accident in the Soviet Union
2002 update; Chapter II – The release, dispersion and deposition of radionuclides" (PDF). OECD-NEA. 2002. Archived (PDF) from the original on 22 June
Chernobyl_disaster
Pharmacologic study of radiated medical compounds
radioisotope, which in its general sense refers to any radioactive isotope (radionuclide), has historically been used to refer to all radiopharmaceuticals, and
Radiopharmacology
Type of radioactive decay
subtype of radioactive decay called beta decay, in which a proton inside a radionuclide nucleus is converted into a neutron while releasing a positron and an
Positron_emission
Radioisotope that is man-made and is not found in nature
A synthetic radioisotope is a radionuclide that is not found in nature: no natural process or mechanism exists which produces it, or it is so unstable
Synthetic_radioisotope
Medical diagnostic method
pertechnetate. Initially it provides a radionuclide angiogram, followed by a static image after the radionuclide has perfused the tissue. In the healthy
Perfusion_scanning
SI unit of frequency
event) per second, 1 Bq (also one per second) specifically refers to one radionuclide event per second on average. Even though frequency, angular velocity
Hertz
Different nuclides with the same neutron number
also the primordial radionuclide 87Rb) and 82 (six: 138Ba, 139La, 140Ce, 141Pr, 142Nd, 144Sm – noting also the primordial radionuclide 136Xe). Neutron numbers
Isotone
Fracturing bedrock by pressurized liquid
gaseous forms, that may be used as tracers, and limit the amount of each radionuclide that may be used per injection and per well. A new technique in well-monitoring
Fracking
Medical diagnostic method
octreotide scan.[further explanation needed] Typically, peptide receptor radionuclide therapy (PRRT) is considered when the Krenning score is greater than
Krenning_score
Medical diagnostic method
blood pumped. Cardiac ventriculography can be performed with a radionuclide in radionuclide ventriculography or with an iodine-based contrast in cardiac
Cardiac_ventriculography
Radioisotope thermoelectric generator
Yellow: Heat isolation Orange: Inner radiation protection (Tungsten) Red: Radionuclide heat source (Strontium-90) Pink: Thermoelectric unit Mounted above the
Beta-M
SI derived unit of radioactivity
per second, on average, for aperiodic activity events referred to a radionuclide. For applications relating to human health this is a small quantity,
Becquerel
Isotope of beryllium
Beryllium-8 (8Be, Be-8) is a radionuclide with 4 neutrons and 4 protons. It is an unbound resonance of two alpha particles and nominally an isotope of
Beryllium-8
Medical diagnostic method
fluid leak is CT cisternography. For the diagnosis of a spinal CSF leak radionuclide cisternography also known as radioisotope cisternography is used. The
Cisternography
radioisotope is 182Hf with a half-life of 8.90 million years, an extinct radionuclide used in hafnium–tungsten dating to study the chronology of planetary
Isotopes_of_hafnium
Medical condition
may be most sensitive in the diagnosis of cancerous bone metastasis. A radionuclide bone scan or scintigraphy can identify bone metastasis. Technetium-99m–labeled
Bone_metastasis
US company and Superfund site
Information CERCLIS ID NJD980654172 Contaminants Cadmium, Radium-228, radon, radionuclide, Thorium-230, Thorium-232, Uranium-234, Uranium-235, Uranium-238, Vanadium(V)
United States Radium Corporation
United_States_Radium_Corporation
Chemical compound
GE Healthcare) is a PET scanning radiopharmaceutical containing the radionuclide fluorine-18, used as a diagnostic tool for Alzheimer's disease. Adverse
Flutemetamol_(18F)
Atomic species
radioactive and are called radionuclides. Their decay products ('daughter' products) are called radiogenic nuclides. Natural radionuclides may be conveniently
Nuclide
Unit of frequency
– the SI unit for the rate of occurrence of aperiodic or stochastic radionuclide events baud (Bd) – the unit for symbol rate over a communication link
Inverse_second
Lists radionuclides of technological importance
Various radionuclides emit beta particles (high-speed electrons or positrons) through radioactive decay of their atomic nucleus. These can be used in
Common_beta_emitters
{{cite journal}}: CS1 maint: periodical has ISBN (link) "carbon-13". thefreedictionary.com. Radionuclide production simulator – IAEA v t e v t e v t e
Isotopes_in_medicine
Set of isotopes in nuclear astrophysics
through metastable isomers, and may have been overlooked. The long-lived radionuclides 92Nb, 97Tc, 98Tc, 146Sm, 150Gd, and 154Dy are not among the classically
P-nuclei
Topics referred to by the same term
radiolabeled with a radionuclide such as phosphorus-32 When used in clinical medical literature, usually an error for the intended term radionuclide This disambiguation
Radionucleotide
Chemical compound
octreotide, DOTA-TOC, DOTATOC) is a substance which, when bound to various radionuclides, is used in the treatment and diagnosis of certain types of cancer.
Edotreotide
two: stable 85Rb (72.2%) and radioactive 87Rb (27.8%). The primordial radionuclide 87Rb has a half-life of 4.97×1010 years, beta decaying to stable 87Sr
Isotopes_of_rubidium
Artificial nuclides with atomic number of 96 but with different mass numbers
isotope beyond curium, and long enough to study as a possible extinct radionuclide that would be produced by the r-process. It is followed by 248Cm, which
Isotopes_of_curium
Radionuclide emitting ionizing radiation
A radioactive source is a known quantity of a radionuclide which emits ionizing radiation, typically one or more of the radiation types gamma rays, alpha
Radioactive_source
Non-SI unit of radioactivity
second in one gram of atoms of a particular radionuclide is known as the specific activity of that radionuclide. The activity of a sample decreases with
Curie_(unit)
Former uranium enrichment plant in Pike County, Ohio, USA
maintenance and change-out of process equipment at the site generated radionuclide contamination, spent solvents and other chemical contaminants that were
Portsmouth Gaseous Diffusion Plant
Portsmouth_Gaseous_Diffusion_Plant
Element that has only a single stable isotope
europium, lutetium, and rhenium, and for indium and rhenium, the long-lived radionuclide is even the more abundant isotope in nature, and the stable isotope the
Monoisotopic_element
Therapy using ionizing radiation, usually to treat cancer
brachytherapy. Radionuclide therapy (also known as systemic radioisotope therapy, radiopharmaceutical therapy, molecular radiotherapy, or targeted radionuclide therapy)
Radiation_therapy
global network included 40 radionuclide sampling stations. In addition, the United States reported that no radionuclides were detected by aircraft over
2009 North Korean nuclear test
2009_North_Korean_nuclear_test
Intergovernmental organization for nuclear-test banning
of specific radionuclides provides unambiguous evidence of a nuclear explosion. Monitoring for radionuclides occurs 24/7. The radionuclide monitoring stations
Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization
Preparatory_Commission_for_the_Comprehensive_Nuclear-Test-Ban_Treaty_Organization
Ecology concerning radioactivity within ecosystems
Radioecologists detect and evaluate the effects of ionizing radiation and radionuclides on ecosystems, and then assess their risks and dangers. Interest and
Radioecology
Medical intervention
radioembolization or intra-arterial microbrachytherapy is a form of radionuclide therapy used in interventional radiology to treat cancer. It is generally
Selective internal radiation therapy
Selective_internal_radiation_therapy
2011 nuclear accident in Japan
137Cs was deposited in the ocean. Thus, the majority (90~99%) of the radionuclides deposited were isotopes of iodine and caesium, with a small portion
Fukushima_nuclear_accident
Eight amino-acid long peptide covalently bonded to a DOTA chelator
bonded DOTA bifunctional chelator. DOTA-TATE can be reacted with the radionuclides gallium-68 (T1/2 = 68 min), lutetium-177 (T1/2 = 6.65 d) and copper-64
DOTA-TATE
Undesirable presence of radioactive substances
release of radioactive gases, liquids or particles. For example, if a radionuclide used in nuclear medicine is spilled (accidentally or, as in the case
Radioactive_contamination
Radionuclide scan
A DMSA scan is a radionuclide scan that uses dimercaptosuccinic acid (DMSA) in assessing renal morphology, structure and function. Radioactive technetium-99m
DMSA_scan
hyperaccumulators, plant species which accumulate, or are tolerant of, radionuclides (Cd, Cs-137, Co, Pu-238, Ra, Sr, U-234, 235, 238), hydrocarbons and
Hyperaccumulators_table_–_3
124Te is used as the starting material in the production of certain radionuclides by a cyclotron or other particle accelerator, such as iodine-123 and
Isotopes_of_tellurium
Tumor of the adrenal medulla which secretes adrenal hormones
Combining anlotinib with radionuclide therapy resulted in a 100% disease control rate during the follow-up period. Radionuclide Therapy Iodine-131
Pheochromocytoma
Indian physician of Nuclear Medicine
particularly on Positron emission tomography diagnostics and Targeted Radionuclide Therapy in Cancer. The Council of Scientific and Industrial Research
Sandip_Basu
On transmutation of elements during radioactive decay
Displacements resulting from various decay modes of a radionuclide. Horizontal axis: atomic number Z. Vertical axis: neutron number N
Radioactive displacement law of Fajans and Soddy
Radioactive_displacement_law_of_Fajans_and_Soddy
Nuclide produced by radioactive conversion from other nuclide
produced by a process of radioactive decay. It may itself be radioactive (a radionuclide) or stable (a stable nuclide). Radiogenic nuclides (more commonly referred
Radiogenic_nuclide
Chemical element with atomic number 95 (Am)
Nuclear Data Sheets. 186: 261. "Metastable Americium 242" (PDF). Table of Radionuclides. LNE - LNHB / CEA. Retrieved 29 April 2026. "Standard Reference Materials:
Americium
Metastable nuclear isomer of technetium-99
bombardment of molybdenum. This procedure produced molybdenum-99, a radionuclide with a longer half-life (2.75 days), which decays to 99mTc. This longer
Technetium-99m
Geologic damage caused by underground nuclear testing
and weakens rock, increasing permeability and the risk of release of radionuclides and radioactive contamination of the environment. Locations said to
Tired_mountain_syndrome
Medical imaging technique
venogram is used more precisely. The term angiography has been applied to radionuclide angiography and newer vascular imaging techniques such as CO2 angiography
Angiography
Radioanalytical chemistry focuses on the analysis of sample for their radionuclide content. Various methods are employed to purify and identify the radioelement
Radioanalytical_chemistry
Chelate of Lu-177 with dotatate, a peptide derivative bound to a DOTA molecule
radioisotope of the element lutetium with dotatate, used in peptide receptor radionuclide therapy. Specifically, it is used in the treatment of cancers which express
Lutetium (177Lu) oxodotreotide
Lutetium_(177Lu)_oxodotreotide
Chemical compound
2-deoxy-2-[18 F]fluoro-D-glucose, a glucose analog, with the positron-emitting radionuclide fluorine-18 substituted for the normal hydroxyl group at the C-2 position
Fluorodeoxyglucose_(18F)
formation, protoplanetary disk evolution, and the origin of short-lived radionuclides. Nier Prize awardee in 2003. JPL · 9926 9927 Tyutchev 1981 TW1 Fyodor
Meanings of minor-planet names: 9001–10000
Meanings_of_minor-planet_names:_9001–10000
Radioactive spill in New Mexico, United States
precipitated onto the arroyo bed. These salts, containing metals and radionuclides, were washed away during subsequent rainstorms. Approximately one month
Church Rock uranium mill spill
Church_Rock_uranium_mill_spill
Technique used to date materials such as rocks or carbon
several relatively short-lived radionuclides like 26Al, 60Fe, 53Mn, and 129I present within the solar nebula. These radionuclides—possibly produced by the explosion
Radiometric_dating
Groundwater contaminated from the Chernobyl disaster
to diverse extraneous contaminants. To the surprise of scientists, radionuclides of Chernobyl origin were found even in deep-laying waters with formation
Chernobyl groundwater contamination
Chernobyl_groundwater_contamination
Decontaminated sewage sludge
as biosolids due to persistent, bioaccumulative and toxic chemicals, radionuclides, and heavy metals at levels sufficient to contaminate soil and water
Biosolids
Critical radionuclides for the long-term safety of nuclear waste repositories
geological periods of time. The focus of this article is radioisotopes (radionuclides) generated by fission reactors. Nuclear fission produces fission products
Long-lived_fission_product
Class of chemical compounds
radiopharmaceutical therapeutic compound, more specifically to conduct peptide radionuclide receptor therapy. There are also some non-radiopharmaceutical compounds
Somatostatin receptor antagonist
Somatostatin_receptor_antagonist
Medical imaging technique
prostate cancer, there is growing interest in using a PET scan with radionuclides delivered via prostate-specific membrane antigen (PSMA) targeting ligand
Positron_emission_tomography
Ionizing radiation
gamma peak at 661 keV, but this is actually emitted by the daughter radionuclide 137mBa. The diagram shows the type and energy of the emitted radiation
Beta_particle
Medical condition
pertechnetate. Initially it provides a radionuclide angiogram, followed by a static image after the radionuclide has perfused the tissue. In the healthy
Testicular_torsion
Chemical element with atomic number 6 (C)
Three isotopes occur naturally, 12C and 13C being stable, while 14C is a radionuclide, decaying with a half-life of 5,700 years. Carbon is one of the few elements
Carbon
– 2: Nickel Hyperaccumulators table – 3: Cd, Cs, Co, Pu, Ra, Sr, U, radionuclides, hydrocarbons, organic solvents, etc. Cs-137 activity was much smaller
List_of_hyperaccumulators
1962 underground nuclear test at the Nevada Test Site
particular radionuclides detected in fallout: 198Au, 199Au, 7Be, 99Mo, 147Nd, 203Pb, 181W, 185W and 188W. Sedan ranked second in these radionuclides in fallout:
Sedan_(nuclear_test)
sulfide minerals in uranium tailings facilitates the release of uranium radionuclides into the environment, which can undergo further radioactive decay while
Uranium_acid_mine_drainage
Star at the centre of the Solar System
S2CID 4240932. Beer, J.; McCracken, K.; von Steiger, R. (2012). Cosmogenic Radionuclides: Theory and Applications in the Terrestrial and Space Environments.
Sun
Modern form of the metric system
lux lx illuminance cd⋅sr⋅m−2 lm/m2 becquerel Bq activity referred to a radionuclide s−1 gray Gy absorbed dose, kerma m2⋅s−2 J/kg sievert Sv dose equivalent
International_System_of_Units
Camera to record gamma radiation
body or the distribution of medically injected, inhaled, or ingested radionuclides emitting gamma rays. Scintigraphy ("scint") is the use of gamma cameras
Gamma_camera
Major river in the Northeastern United States
concentrations of radionuclides from natural and anthropogenic sources. During this study, various series of gamma-emitting radionuclide concentration measurements
Susquehanna_River
Combination of cancer diagnosis and treatment
response to therapy. Moreover, SPECT imaging is employed in targeted radionuclide therapy, where the same radiotracer used for diagnostic imaging can be
Theranostics
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