A heavy, bluish white metal, atomic number 81, atomic weight [204.382; 204.385], symbol Tl.
Unstable isotopes of thallium that decay or disintegrate emitting radiation. Tl atoms with atomic weights 198-202, 204, and 206-210 are thallium radioisotopes.
Isotopes that exhibit radioactivity and undergo radioactive decay. (From Grant & Hackh's Chemical Dictionary, 5th ed & McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Unstable isotopes of zinc that decay or disintegrate emitting radiation. Zn atoms with atomic weights 60-63, 65, 69, 71, and 72 are radioactive zinc isotopes.
The hollow, muscular organ that maintains the circulation of the blood.
Inorganic salts of the hypothetical acid ferrocyanic acid (H4Fe(CN)6).
Method for assessing flow through a system by injection of a known quantity of radionuclide into the system and monitoring its concentration over time at a specific point in the system. (From Dorland, 28th ed)
Striated muscle cells found in the heart. They are derived from cardiac myoblasts (MYOBLASTS, CARDIAC).
Unstable isotopes of iodine that decay or disintegrate emitting radiation. I atoms with atomic weights 117-139, except I 127, are radioactive iodine isotopes.
A method of computed tomography that uses radionuclides which emit a single photon of a given energy. The camera is rotated 180 or 360 degrees around the patient to capture images at multiple positions along the arc. The computer is then used to reconstruct the transaxial, sagittal, and coronal images from the 3-dimensional distribution of radionuclides in the organ. The advantages of SPECT are that it can be used to observe biochemical and physiological processes as well as size and volume of the organ. The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image.
Unstable isotopes of strontium that decay or disintegrate spontaneously emitting radiation. Sr 80-83, 85, and 89-95 are radioactive strontium isotopes.
The production of an image obtained by cameras that detect the radioactive emissions of an injected radionuclide as it has distributed differentially throughout tissues in the body. The image obtained from a moving detector is called a scan, while the image obtained from a stationary camera device is called a scintiphotograph.
Unstable isotopes of krypton that decay or disintegrate emitting radiation. Kr atoms with atomic weights 74-77, 79, 81, 85, and 87-94 are radioactive krypton isotopes.
A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752)
Controlled physical activity which is performed in order to allow assessment of physiological functions, particularly cardiovascular and pulmonary, but also aerobic capacity. Maximal (most intense) exercise is usually required but submaximal exercise is also used.
Unstable isotopes of indium that decay or disintegrate emitting radiation. In atoms with atomic weights 106-112, 113m, 114, and 116-124 are radioactive indium isotopes.
The volume of BLOOD passing through the HEART per unit of time. It is usually expressed as liters (volume) per minute so as not to be confused with STROKE VOLUME (volume per beat).
Unstable isotopes of sodium that decay or disintegrate emitting radiation. Na atoms with atomic weights 20-22 and 24-26 are radioactive sodium isotopes.
An imbalance between myocardial functional requirements and the capacity of the CORONARY VESSELS to supply sufficient blood flow. It is a form of MYOCARDIAL ISCHEMIA (insufficient blood supply to the heart muscle) caused by a decreased capacity of the coronary vessels.
The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)
Unstable isotopes of barium that decay or disintegrate emitting radiation. Ba atoms with atomic weights 126-129, 131, 133, and 139-143 are radioactive barium isotopes.
Unstable isotopes of yttrium that decay or disintegrate emitting radiation. Y atoms with atomic weights 82-88 and 90-96 are radioactive yttrium isotopes.
Unstable isotopes of tin that decay or disintegrate emitting radiation. Sn atoms with atomic weights 108-111, 113, 120-121, 123 and 125-128 are tin radioisotopes.
Any disturbances of the normal rhythmic beating of the heart or MYOCARDIAL CONTRACTION. Cardiac arrhythmias can be classified by the abnormalities in HEART RATE, disorders of electrical impulse generation, or impulse conduction.
Surgery performed on the heart.
Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes.
Unstable isotopes of iron that decay or disintegrate emitting radiation. Fe atoms with atomic weights 52, 53, 55, and 59-61 are radioactive iron isotopes.
Unstable isotopes of copper that decay or disintegrate emitting radiation. Cu atoms with atomic weights 58-62, 64, and 66-68 are radioactive copper isotopes.
Unstable isotopes of phosphorus that decay or disintegrate emitting radiation. P atoms with atomic weights 28-34 except 31 are radioactive phosphorus isotopes.
Unexpected rapid natural death due to cardiovascular collapse within one hour of initial symptoms. It is usually caused by the worsening of existing heart diseases. The sudden onset of symptoms, such as CHEST PAIN and CARDIAC ARRHYTHMIAS, particularly VENTRICULAR TACHYCARDIA, can lead to the loss of consciousness and cardiac arrest followed by biological death. (from Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 7th ed., 2005)
Compounds that are used in medicine as sources of radiation for radiotherapy and for diagnostic purposes. They have numerous uses in research and industry. (Martindale, The Extra Pharmacopoeia, 30th ed, p1161)
Agents counteracting or neutralizing the action of POISONS.
The muscle tissue of the HEART. It is composed of striated, involuntary muscle cells (MYOCYTES, CARDIAC) connected to form the contractile pump to generate blood flow.
High energy POSITRONS or ELECTRONS ejected from a disintegrating atomic nucleus.
The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, atomic number 43, and atomic weight 98.91. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.
Recording of the moment-to-moment electromotive forces of the HEART as projected onto various sites on the body's surface, delineated as a scalar function of time. The recording is monitored by a tracing on slow moving chart paper or by observing it on a cardioscope, which is a CATHODE RAY TUBE DISPLAY.
Unstable isotopes of mercury that decay or disintegrate emitting radiation. Hg atoms with atomic weights 185-195, 197, 203, 205, and 206 are radioactive mercury isotopes.
A gamma-emitting radionuclide imaging agent used for the diagnosis of diseases in many tissues, particularly in the gastrointestinal system, liver, and spleen.
Stable cesium atoms that have the same atomic number as the element cesium, but differ in atomic weight. Cs-133 is a naturally occurring isotope.
Absence of hair from areas where it is normally present.
Unstable isotopes of potassium that decay or disintegrate emitting radiation. K atoms with atomic weights 37, 38, 40, and 42-45 are radioactive potassium isotopes.
Unstable isotopes of cerium that decay or disintegrate emitting radiation. Ce atoms with atomic weights 132-135, 137, 139, and 141-148 are radioactive cerium isotopes.
Stable cobalt atoms that have the same atomic number as the element cobalt, but differ in atomic weight. Co-59 is a stable cobalt isotope.
Hafnium. A metal element of atomic number 72 and atomic weight 178.49, symbol Hf. (From Dorland, 28th ed)
Pathological conditions involving the HEART including its structural and functional abnormalities.
Procedures in which placement of CARDIAC CATHETERS is performed for therapeutic or diagnostic procedures.
Elements of limited time intervals, contributing to particular results or situations.
Unstable isotopes of gold that decay or disintegrate emitting radiation. Au 185-196, 198-201, and 203 are radioactive gold isotopes.
Imaging of a ventricle of the heart after the injection of a radioactive contrast medium. The technique is less invasive than cardiac catheterization and is used to assess ventricular function.
Contractile activity of the MYOCARDIUM.
Techniques for labeling a substance with a stable or radioactive isotope. It is not used for articles involving labeled substances unless the methods of labeling are substantively discussed. Tracers that may be labeled include chemical substances, cells, or microorganisms.
Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.
Unstable isotopes of lead that decay or disintegrate emitting radiation. Pb atoms with atomic weights 194-203, 205, and 209-214 are radioactive lead isotopes.
Substances used to destroy or inhibit the action of rats, mice, or other rodents.
Radionuclide ventriculography where scintigraphic data is acquired during repeated cardiac cycles at specific times in the cycle, using an electrocardiographic synchronizer or gating device. Analysis of right ventricular function is difficult with this technique; that is best evaluated by first-pass ventriculography (VENTRICULOGRAPHY, FIRST-PASS).
Any diagnostic evaluation using radioactive (unstable) isotopes. This diagnosis includes many nuclear medicine procedures as well as radioimmunoassay tests.
Stable zinc atoms that have the same atomic number as the element zinc, but differ in atomic weight. Zn-66-68, and 70 are stable zinc isotopes.
Unstable isotopes of sulfur that decay or disintegrate spontaneously emitting radiation. S 29-31, 35, 37, and 38 are radioactive sulfur isotopes.
Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)
The circulation of blood through the CORONARY VESSELS of the HEART.
NECROSIS of the MYOCARDIUM caused by an obstruction of the blood supply to the heart (CORONARY CIRCULATION).
A condition or physical state produced by the ingestion, injection, inhalation of or exposure to a deleterious agent.
Unstable isotopes of cadmium that decay or disintegrate emitting radiation. Cd atoms with atomic weights 103-105, 107, 109, 115, and 117-119 are radioactive cadmium isotopes.
Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic.
Astatine. A radioactive halogen with the atomic symbol At, atomic number 85, and atomic weight 210. Its isotopes range in mass number from 200 to 219 and all have an extremely short half-life. Astatine may be of use in the treatment of hyperthyroidism.
Radiography of the vascular system of the heart muscle after injection of a contrast medium.
A catecholamine derivative with specificity for BETA-1 ADRENERGIC RECEPTORS. It is commonly used as a cardiotonic agent after CARDIAC SURGERY and during DOBUTAMINE STRESS ECHOCARDIOGRAPHY.
Radiotherapy where cytotoxic radionuclides are linked to antibodies in order to deliver toxins directly to tumor targets. Therapy with targeted radiation rather than antibody-targeted toxins (IMMUNOTOXINS) has the advantage that adjacent tumor cells, which lack the appropriate antigenic determinants, can be destroyed by radiation cross-fire. Radioimmunotherapy is sometimes called targeted radiotherapy, but this latter term can also refer to radionuclides linked to non-immune molecules (see RADIOTHERAPY).
Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE) or several forms of CARDIOMYOPATHIES.
Lutetium. An element of the rare earth family of metals. It has the atomic symbol Lu, atomic number 71, and atomic weight 175.
Compression of the heart by accumulated fluid (PERICARDIAL EFFUSION) or blood (HEMOPERICARDIUM) in the PERICARDIUM surrounding the heart. The affected cardiac functions and CARDIAC OUTPUT can range from minimal to total hemodynamic collapse.
Regulation of the rate of contraction of the heart muscles by an artificial pacemaker.
The lower right and left chambers of the heart. The right ventricle pumps venous BLOOD into the LUNGS and the left ventricle pumps oxygenated blood into the systemic arterial circulation.
Rhenium. A metal, atomic number 75, atomic weight 186.2, symbol Re. (Dorland, 28th ed)
Samarium. An element of the rare earth family of metals. It has the atomic symbol Sm, atomic number 62, and atomic weight 150.36. The oxide is used in the control rods of some nuclear reactors.
A disorder of cardiac function caused by insufficient blood flow to the muscle tissue of the heart. The decreased blood flow may be due to narrowing of the coronary arteries (CORONARY ARTERY DISEASE), to obstruction by a thrombus (CORONARY THROMBOSIS), or less commonly, to diffuse narrowing of arterioles and other small vessels within the heart. Severe interruption of the blood supply to the myocardial tissue may result in necrosis of cardiac muscle (MYOCARDIAL INFARCTION).
The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM.
A condition in which the LEFT VENTRICLE of the heart was functionally impaired. This condition usually leads to HEART FAILURE; MYOCARDIAL INFARCTION; and other cardiovascular complications. Diagnosis is made by measuring the diminished ejection fraction and a depressed level of motility of the left ventricular wall.
Pollutants, present in soil, which exhibit radioactivity.
Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents.
Accumulation of a drug or chemical substance in various organs (including those not relevant to its pharmacologic or therapeutic action). This distribution depends on the blood flow or perfusion rate of the organ, the ability of the drug to penetrate organ membranes, tissue specificity, protein binding. The distribution is usually expressed as tissue to plasma ratios.
Studies determining the effectiveness or value of processes, personnel, and equipment, or the material on conducting such studies. For drugs and devices, CLINICAL TRIALS AS TOPIC; DRUG EVALUATION; and DRUG EVALUATION, PRECLINICAL are available.
Detection and counting of scintillations produced in a fluorescent material by ionizing radiation.
Unstable isotopes of bromine that decay or disintegrate emitting radiation. Br atoms with atomic weights 74-78, 80, and 82-90 are radioactive bromine isotopes.
Leakage and accumulation of CEREBROSPINAL FLUID in the subdural space which may be associated with an infectious process; CRANIOCEREBRAL TRAUMA; BRAIN NEOPLASMS; INTRACRANIAL HYPOTENSION; and other conditions.
The amount of BLOOD pumped out of the HEART per beat, not to be confused with cardiac output (volume/time). It is calculated as the difference between the end-diastolic volume and the end-systolic volume.
Stable calcium atoms that have the same atomic number as the element calcium, but differ in atomic weight. Ca-42-44, 46, and 48 are stable calcium isotopes.
Liquid, solid, or gaseous waste resulting from mining of radioactive ore, production of reactor fuel materials, reactor operation, processing of irradiated reactor fuels, and related operations, and from use of radioactive materials in research, industry, and medicine. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
The hemodynamic and electrophysiological action of the left HEART VENTRICLE. Its measurement is an important aspect of the clinical evaluation of patients with heart disease to determine the effects of the disease on cardiac performance.
Normal human serum albumin mildly iodinated with radioactive iodine (131-I) which has a half-life of 8 days, and emits beta and gamma rays. It is used as a diagnostic aid in blood volume determination. (from Merck Index, 11th ed)
Cessation of heart beat or MYOCARDIAL CONTRACTION. If it is treated within a few minutes, heart arrest can be reversed in most cases to normal cardiac rhythm and effective circulation.
The number of times the HEART VENTRICLES contract per unit of time, usually per minute.
The symptom of paroxysmal pain consequent to MYOCARDIAL ISCHEMIA usually of distinctive character, location and radiation. It is thought to be provoked by a transient stressful situation during which the oxygen requirements of the MYOCARDIUM exceed that supplied by the CORONARY CIRCULATION.
In screening and diagnostic tests, the probability that a person with a positive test is a true positive (i.e., has the disease), is referred to as the predictive value of a positive test; whereas, the predictive value of a negative test is the probability that the person with a negative test does not have the disease. Predictive value is related to the sensitivity and specificity of the test.
The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065)
Unstable isotopes of gallium that decay or disintegrate emitting radiation. Ga atoms with atomic weights 63-68, 70 and 72-76 are radioactive gallium isotopes.
Unstable isotopes of ruthenium that decay or disintegrate emitting radiation. Ru atoms with atomic weights 93-95, 97, 103, and 105-108 are radioactive ruthenium isotopes.
Techniques used to determine the age of materials, based on the content and half-lives of the RADIOACTIVE ISOTOPES they contain.
A gamma-emitting radionuclide imaging agent used for the diagnosis of diseases in many tissues, particularly in the gastrointestinal system, cardiovascular and cerebral circulation, brain, thyroid, and joints.
Unstable isotopes of selenium that decay or disintegrate emitting radiation. Se atoms with atomic weights 70-73, 75, 79, 81, and 83-85 are radioactive selenium isotopes.
Positively charged particles composed of two protons and two NEUTRONS, i.e. equivalent to HELIUM nuclei, which are emitted during disintegration of heavy ISOTOPES. Alpha rays have very strong ionizing power, but weak penetrability.
Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.
A class of organic compounds containing a ring structure made up of more than one kind of atom, usually carbon plus another atom. The ring structure can be aromatic or nonaromatic.
Precursor cells destined to differentiate into cardiac myocytes (MYOCYTES, CARDIAC).
Tungsten. A metallic element with the atomic symbol W, atomic number 74, and atomic weight 183.85. It is used in many manufacturing applications, including increasing the hardness, toughness, and tensile strength of steel; manufacture of filaments for incandescent light bulbs; and in contact points for automotive and electrical apparatus.
A heterogeneous condition in which the heart is unable to pump out sufficient blood to meet the metabolic need of the body. Heart failure can be caused by structural defects, functional abnormalities (VENTRICULAR DYSFUNCTION), or a sudden overload beyond its capacity. Chronic heart failure is more common than acute heart failure which results from sudden insult to cardiac function, such as MYOCARDIAL INFARCTION.
A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS).
Prolonged dysfunction of the myocardium after a brief episode of severe ischemia, with gradual return of contractile activity.
Atomic species differing in mass number but having the same atomic number. (Grant & Hackh's Chemical Dictionary, 5th ed)
A specialty field of radiology concerned with diagnostic, therapeutic, and investigative use of radioactive compounds in a pharmaceutical form.
An iron chelating agent with properties like EDETIC ACID. DTPA has also been used as a chelator for other metals, such as plutonium.
A type of high-energy radiotherapy using a beam of gamma-radiation produced by a radioisotope source encapsulated within a teletherapy unit.
The restoration of blood supply to the myocardium. (From Dorland, 28th ed)
A series of steps taken in order to conduct research.
A rare, metallic element designated by the symbol, Ga, atomic number 31, and atomic weight 69.72.
Determination of the energy distribution of gamma rays emitted by nuclei. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Myosin type II isoforms found in cardiac muscle.
Visualization of the heart structure and cardiac blood flow for diagnostic evaluation or to guide cardiac procedures via techniques including ENDOSCOPY (cardiac endoscopy, sometimes refered to as cardioscopy), RADIONUCLIDE IMAGING; MAGNETIC RESONANCE IMAGING; TOMOGRAPHY; or ULTRASONOGRAPHY.
The veins and arteries of the HEART.
A technetium imaging agent used in renal scintigraphy, computed tomography, lung ventilation imaging, gastrointestinal scintigraphy, and many other procedures which employ radionuclide imaging agents.
A technetium imaging agent used to reveal blood-starved cardiac tissue during a heart attack.
Studies in which individuals or populations are followed to assess the outcome of exposures, procedures, or effects of a characteristic, e.g., occurrence of disease.
Cyclopentanophenanthrenes with a 5- or 6-membered lactone ring attached at the 17-position and SUGARS attached at the 3-position. Plants they come from have long been used in congestive heart failure. They increase the force of cardiac contraction without significantly affecting other parameters, but are very toxic at larger doses. Their mechanism of action usually involves inhibition of the NA(+)-K(+)-EXCHANGING ATPASE and they are often used in cell biological studies for that purpose.
Traumatic injuries to the OLFACTORY NERVE. It may result in various olfactory dysfunction including a complete loss of smell.
鉈(拼音:tā,注音:ㄊㄚ;英语:thallium)是化學元素,符號為Tl,原子序為81,是質軟的灰色貧金屬,在自然界並不以單質存在。鉈金屬外表和錫相似,但會在空氣中失去光澤。兩位化學家威廉·克魯克斯和克洛德-奧古斯特·拉米在1861年獨立發現了這一元素 ... Manual for reactor produced radioisotopes (PDF). International Atomic Energy Agency. 2003 [2010-05-13].. ... Cardiac
It is the most popular isotope used for thallium nuclear cardiac stress tests. Thallium(III) compounds resemble the ... The radioisotope thallium-201 (as the soluble chloride TlCl) is used in small amounts as an agent in a nuclear medicine scan, ... Like indium, thallium cyclopentadienyl compounds contain thallium(I), in contrast to gallium(III). Thallium (Greek θαλλός, ... and thallium(III). Thallium(III) oxide, Tl2O3, is a black solid which decomposes above 800 °C, forming the thallium(I) oxide ...
Manual for reactor produced radioisotopes. International Atomic Energy Agency. 2003. Hentet 2010-05-13.. (engelsk) ... Cardiac SPECT imaging (2 udg.). Lippincott Williams & Wilkins. s. 155-178. ISBN 978-0-7817-2007-6.. (engelsk) ... Thallium(I)bromid er en lysfølsom gul forbindelse meget lig sølvbromid, mens det sorte thallium(I)oxid og thallium(I)sulfid ... Året efter isolerede Lamy thallium ved hjælp af elektrolyse. Thallium optræder i oxidationstrin +3 og +1 i salte. Thallium i ...
It displays the +1 oxidation state that all the known alkali metals display, and thallium compounds with thallium in its +1 ... Radioisotopes of francium would presumably be dangerous as well due to their high decay energy and short half-life, but none ... Excess caesium can lead to hypokalemia, arrythmia, and acute cardiac arrest, but such amounts would not ordinarily be ... and thallium. Two years later, Mendeleev revised his table, placing hydrogen in group 1 above lithium, and also moving thallium ...
Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium ... Radioisotopes of caesium require special precautions: the improper handling of caesium-137 gamma ray sources can lead to ... and acute cardiac arrest,[242] but such amounts would not ordinarily be encountered in natural sources.[243] As such, caesium ... 28 and thallium compounds with thallium in its +1 oxidation state closely resemble the corresponding potassium or silver ...
Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium ... Caesium-137 is a radioisotope commonly used as a gamma-emitter in industrial applications. Its advantages include a half-life ... and acute cardiac arrest.[110] But such amounts would not ordinarily be encountered in natural sources.[111] ... Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from ...
Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium ... Caesium-137 is a radioisotope commonly used as a gamma-emitter in industrial applications. Its advantages include a half-life ... and acute cardiac arrest.[109] But such amounts would not ordinarily be encountered in natural sources.[110] ... Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from ...
鉈(拼音:tā,注音:ㄊㄚ;英语:thallium)是化學元素,符號為Tl,原子序為81,是質軟的灰色貧金屬,在自然界並不以單質存在。鉈金屬外表和錫相似,但會在空氣中失去光澤。兩位化學家威廉·克魯克斯和克洛德-奧古斯特·拉米在1861年獨立發現了這一元素 ... Manual for reactor produced radioisotopes (PDF). International Atomic Energy Agency. 2003 [2010-05-13].. ... Cardiac
It is the most popular isotope used for thallium nuclear cardiac stress tests. Thallium(III) compounds resemble the ... The radioisotope thallium-201 (as the soluble chloride TlCl) is used in small amounts as an agent in a nuclear medicine scan, ... Like indium, thallium cyclopentadienyl compounds contain thallium(I), in contrast to gallium(III). Thallium (Greek θαλλός, ... and thallium(III). Thallium(III) oxide, Tl2O3, is a black solid which decomposes above 800 °C, forming the thallium(I) oxide ...
This report is segmented by type of radioisotopes, application, and geography. ... The nuclear medicine radioisotopes market is expected to register a CAGR of nearly 11.1% during the forecast period, 2019-2024 ... Increasing cases of cancer and cardiac ailments are the major drivers for the nuclear medicine radioisotopes market. Nuclear ... 5.1 Type of Radioisotopes. * 5.1.1 Technetium-99m (Tc-99m). * 5.1.2 Thallium-201 (Tl-201) ...
Manual for reactor produced radioisotopes. International Atomic Energy Agency. 2003. Hentet 2010-05-13.. (engelsk) ... Cardiac SPECT imaging (2 udg.). Lippincott Williams & Wilkins. s. 155-178. ISBN 978-0-7817-2007-6.. (engelsk) ... Thallium(I)bromid er en lysfølsom gul forbindelse meget lig sølvbromid, mens det sorte thallium(I)oxid og thallium(I)sulfid ... Året efter isolerede Lamy thallium ved hjælp af elektrolyse. Thallium optræder i oxidationstrin +3 og +1 i salte. Thallium i ...
View Videos or join the Thallium discussion. Add Thallium to your PopFlock.com topic list or share. Thallium at popflock.com ... Cardiac Nuclear Medicine : What is a stress thallium test?. Add to List Share. Yves de Sistelle Paris THALLIUM WOMEN Eau de ... The radioisotope thallium-201 (as the soluble chloride TlCl) is used in small, nontoxic amounts as an agent in a nuclear ... Thallium stress test. A thallium stress test is a form of scintigraphy in which the amount of thallium in tissues correlates ...
It displays the +1 oxidation state that all the known alkali metals display, and thallium compounds with thallium in its +1 ... Radioisotopes of francium would presumably be dangerous as well due to their high decay energy and short half-life, but none ... Excess caesium can lead to hypokalemia, arrythmia, and acute cardiac arrest, but such amounts would not ordinarily be ... and thallium. Two years later, Mendeleev revised his table, placing hydrogen in group 1 above lithium, and also moving thallium ...
Nuclear Medicine Radioisotopes Market Insights includes market share, market research report, Impact Analysis of COVID-19, ... 5.1 Type of Radioisotopes. 5.1.1 Technetium-99m (Tc-99m). 5.1.2 Thallium-201 (Tl-201). 5.1.3 Iodine (I-123). 5.1.4 Fluorine-18 ... Increasing cases of cancer and cardiac ailments are the major drivers for the nuclear medicine radioisotopes market. Nuclear ... 6.1.8 NTP Radioisotopes SOC Ltd. 6.1.9 Fujifilm Holdings Corporation. 6.1.10 Sotera Health (Nordion Inc.). 7 MARKET ...
Radionuclides employed are pyrophosphate marked with Tc-99m or thallium-201. Although it is still used, the results are no very ... A long path has been covered demanding the obtention of proper radioisotopes in line with the developed techniques in order to ... medication in conditions leading to cardiac arrest. But he paved the way to numerous procedures that were developed by other ... The crystals may be composed by potassium iodide activated with thallium, when they are excited by radiation they emit light ...
Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium ... Radioisotopes of caesium require special precautions: the improper handling of caesium-137 gamma ray sources can lead to ... and acute cardiac arrest,[242] but such amounts would not ordinarily be encountered in natural sources.[243] As such, caesium ... 28 and thallium compounds with thallium in its +1 oxidation state closely resemble the corresponding potassium or silver ...
Cardiac Catheterization and Angiography. ++. Cardiac catheterization plays a pivotal role in the evaluation of patients with ... Since thallium is a potassium analogue, it enters normal myocytes that have an active sodium-potassium ATPase pump (ie, viable ... Since radioisotope uptake by the myocardium is directly related to coronary arterial blood flow, the region of myocardium ... Roles of nuclear cardiology, cardiac computed tomography, and cardiac magnetic resonance: Assessment of patients with suspected ...
Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium ... Caesium-137 is a radioisotope commonly used as a gamma-emitter in industrial applications. Its advantages include a half-life ... and acute cardiac arrest.[110] But such amounts would not ordinarily be encountered in natural sources.[111] ... Caesium is mined mostly from pollucite, while the radioisotopes, especially caesium-137, a fission product, are extracted from ...
39 patients experienced chest pain and had either a positive thallium scan [26 cases] suggestive of CAD or a normal thallium ... Antagonism of isoproterenol-induced cardiac necrosis in mice by adenosine, dipyridamole and prenylamine. ... Radioisotopes , Stimulation, Chemical , Tomography, Emission-Computed, Single-Photon ... Exercise Thallium-201 myocardial perfusion imaging is a sensitive technique for detection of CAD. However, in patients unable ...
... dérivés de Thallium, dictionnaire analogique de Thallium (anglais) ... It is the most popular isotope used for thallium nuclear cardiac stress tests.[8] ... Thallium Radioisotopes. Cyclopentadienyl thallium • Eka-Thallium • Eka-thallium • Isotopes of thalliumThallium azide • ... Thallium(III) oxide • Thallium-176 • Thallium-177 • Thallium-178 • Thallium-179 • Thallium-180 • Thallium-181 • Thallium-182 • ...
  • Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production. (wikipedia.org)
  • Thallium blev opdaget i 1861 af kemikerne William Crookes og Claude-Auguste Lamy (uafhængigt af hinanden) i rester fra produktionen af svovlsyre . (wikipedia.org)
  • Increasing cases of cancer and cardiac ailments are the major drivers for the nuclear medicine radioisotopes market. (mordorintelligence.com)
  • North America captured the largest market share in the nuclear medicine radioisotopes market. (mordorintelligence.com)
  • There is high competition among the players of the global nuclear medicine radioisotopes market. (sdki.jp)
  • GE Healthcare,NTP Radioisotopes SOC Ltd, Nordion (Canada) Inc., Siemens Healthcare, and Positron Corp. are some of the major players in the nuclear medicine radioisotopes market. (sdki.jp)
  • The radioisotope thallium-201 (as the soluble chloride TlCl) is used in small amounts as an agent in a nuclear medicine scan, during one type of nuclear cardiac stress test. (wikipedia.org)
  • Den radioaktive isotop thallium-201 anvendes i små, ugiftige mængder (i form af det opløselige klorid TlCl) til nuklearmedicinsk scanning i forbindelse med en type hjertediagnostik. (wikipedia.org)
  • Thallium tends to form the +3 and +1 oxidation states. (wikipedia.org)
  • Thallium i sin rene, isolerede form er gråt og blødt og minder om tin , men ændrer farve ved kontakt med luft. (wikipedia.org)
  • Thallium is a chemical element with the symbol Tl and atomic number 81. (wikipedia.org)
  • Since bond energies decrease down the group, with thallium, the energy released in forming two additional bonds and attaining the +3 state is not always enough to outweigh the energy needed to involve the 6s-electrons. (wikipedia.org)
  • These radioisotopes, used in a diagnosis, emit gamma rays of energy that are sufficient to escape from the body. (mordorintelligence.com)
  • As per the scope of the report, medical radioisotopes are defined as safe radioactive substances that are primarily used in the diagnosis of medical conditions. (mordorintelligence.com)
  • Nonradioactive caesium compounds are only mildly toxic , but the pure metal's tendency to react explosively with water means that caesium is considered a hazardous material, and the radioisotopes present a significant health and ecological hazard in the environment. (wikipedia.org)