FINAL 05 - Radiopharmaceuticals Flashcards
Is a radioactive pharmaceutical agent that is used for diagnostic or therapeutic procedure
Radiopharmaceutical
Substances that have the same number of protons but have varying numbers of neutrons
Radionuclide
Equation that allows the clinician to predict the activity of radioactive material
Decay equation
The fundamental unit of radioactivity; defined as 3.7x10^10 nuclear transformation per second or disintegrations per second (dps)
Curie (Ci)
Radiopharmaceuticals that deliver the minimum possible radiation dose to the patient while still obtaining the required diagnostic information (Types of radiopharmaceuticals)
Diagnostic radiopharmaceuticals
Radiopharmaceuticals that deliver the maximum radiation dose to the diseased organ or tumor while minimizing the radiation dose to nontarget tissues (Types of radiopharmaceuticals)
Therapy radiopharmaceuticals
A metastable nuclear isomer of technetium 99, the most commonly used medical radioisotope (Examples of radiopharmaceutical agents)
Technetium-99m (99m Tc)
Half-life of Technetium-99m (99m Tc)
1 day/24 hours
An isotope of yttrium; used in radiation therapy to treat cancer (Examples of radiopharmaceutical agents)
Yttrium-90 (90 Y)
Half-life of Yttrium-90 (90 Y)
64.1 hours
A diagnostic radiopharmaceutical indicated for myocardial perfusion imaging for the diagnosis of coronary artery disease (Examples of radiopharmaceutical agents)
Thallous-201 chloride (201 Tl)
Meaning of SPECT
Single-photon emission computed tomography
Used as a radioactive tracer to obtain images of a specific type of tissue, or disease state of tissue (Examples of radiopharmaceutical agents)
Gallium-67 citrate (67 Ga)
An isotope of indium that is useful for isotopic labeling of blood cell components (Examples of radiopharmaceutical agents)
Indium-111 chloride (111 In)
Half life of Indium-111 chloride (111 In)
2.8 days
Used in nuclear imaging; used for the diagnostic study of thyroid diseases (Examples of radiopharmaceutical agents)
Sodium iodide-123 (123 I)
Half life of Sodium iodide-123 (123 I)
13.13 hours
An isotope used to treat hyperthyroidism and certain thyroid cancer (Examples of radiopharmaceutical agents)
Sodium iodide-131 (131 I)
Emits beta particles and gamma rays; it localizes selectively in the bone and is used in palliation of bone cancer (Examples of radiopharmaceutical agents)
Samarium-153 (153 Sm)
This isotope is useful in calibration of gamma ray spectrometers (Examples of radiopharmaceutical agents)
Holmium-166 (166 Ho)
This synthetic isotope is bound to ocreotate and is used in targeted radionuclide therapy for neuroendocrine tumors and bone pain palliation (Examples of radiopharmaceutical agents)
Lutetium-177 (177 Lu)
2 isotopes that are used for bone palliation, endo-radiotherapy, tumor therapy (RR)
Rhenium-186 & Rhenium-188 (186/188 Re)
Therapy where the absorbed dose to be delivered should be determined from uptake measurements, effective half-life of the radiopharmaceutical and the size of the thyroid
I-131 therapy
Is a local intraarticular injection of radionuclides in colloidal form of radiotherapy
Radiosynovectomy
A kind of care that makes a person feel better even if it does not cure the disease
Palliation
Involves the IV injection of a radiopharmaceutical
Pain palliation
Imaging that detects function properties of the human tissue
Nuclear imaging
The distribution of the pharmaceutical is fixed over the imaging period (Types of nuclear imaging)
Static imaging
The camera scans over the whole body to cover more widespread distributions or unknown locations (Types of nuclear imaging)
Whole body imaging
Consecutive images are acquired over a period of time showing the changing distribution of the radiopharmaceutical in the organ of interest (Types of nuclear imaging)
Dynamic imaging
Scan that reflects bone metabolism and blood flow, and allows functional analysis of bone turnover (Types of scan)
Bone scan
Scan where a proportionately spread embolization of the pulmonary capillary bed yields an image reflection the lung blood perfusion (Types of scan)
Lung scan
Scan that offers structural and functional information by displaying the thyroid image and calculating uptake, organ volume, etc. (Types of scan)
Thyroid scintigraphy/scan
Reflects renal blood perfusion, uptake, and excretion (Types of scan)
Dynamic renal scintigraphy
Meaning of PET
Positron emission tomography
4 isotopes used in PET (CNOF)
Carbon-11, Nitrogen-13, Oxygen-15, Fluorine-18
Is a radioactive isotope of carbon that decays to boron-1; it is used in radioactive labeling of molecules in PET (Isotopes used in PET)
Carbon-11
Is a radioisotope of nitrogen used in PET, primarily to tag ammonia molecules for PET myocardial perfusion (Isotopes used in PET)
Nitrogen-13
Is a radioisotope synthesized into fluorodeoxyglucose (FDG) for use in PET scans and used for labelling antibodies that allows for PET imaging of cancer (Isotopes used in PET)
Fluorine-18
Is a radioisotope of oxygen used in PET-imaging; it is synthesized through deuteron bombardment of nitrogen-14 using a cyclotron (Isotopes used in PET)
Oxygen-15
Machine that works by using a scanning device to detect positrons (subatomic particles) emitted by a radionuclide in the organ or tissue being examined
PET scanner
An apparatus in which charged atomic and subatomic particles are accelerated by an alternating electric field while following an outward spiral or circular path in a magnetic field
Cyclotron