Flashcards in Chapter 20 Deck (55):
Posteroanterior (PA) view
Most common chest x-ray, x-rays travel from a posteriorly places source to an anteriorly placed detector. Chest against the board.
Anteroposterior (AP) view
X-rays travel from an anteriorly placed sours to a posteriorly placed detector. Back against the board.
In a left lateral view, x-rays travel from a source located to the right of the patient t a detector placed to the left of the patient. Left side against the board.
X-rays travel in a slanting direction at an angle from the perpendicular plane. Oblique views show regions or structures ordinary hitting and superimposed in route PA and AP views.
Movement toward the middle of the body
Movement away from the middle of the body
Lengthening or straightening a flexed limb
Bending a part of the body
Laying down on the side (with the x-ray beam horizontally positioned).
Laying on the belly (face down)
Laying down (may be prone or supine)
Laying on the back (face up)
Computed tomography (CT)
Diagnostic x-ray procedure whereby a cross-sectional images of a specific body segment was produced. Newer CT scans can create 3-D images as well.
Radiopaque materials (contrast media) are injected to obtain contrast with surrounding tissue when shown on the x-ray film.
Machine to detect gamma rays emitted from radiopharmaceuticals during standing for diagnostic purposes.
Time required for radioactive substance to lose half its radioactivity by disintegration.
Therapeutic or diagnostic procedures performed by a radiologist. Examples are needle biopsy of the mass and drainage of an abscess, typically under the guidance of CT or fluoroscopy.
Process, test, or procedures performed, measured, or observed outside a living organism, often in a test tube.
Process, test, or procedure is performed, measured, or observed within a living organism.
Transformation of electrically neutral substances ino electrically charged particles. X-rays cause ionization of particles within tissues.
Magnetic resonance imaging (MRI)
Magnetic field and radio waves produced sagittal, coronal, and axial images of the body.
Medical specialty that uses radioactive substances in the diagnostics of disease
Positron emission tomography (PET)
Positron-emitting radioactive substances given intravenously create a cross-sectional images of cellular metabolism based on local concentration of the radioactive substance. PET scans give information about metabolic activity.
Test combines radioactive chemicals and antibodies to detect minute quantities of substances and patient's blood.
Radioactive form of an element substance; radionuclide.
Radiopharmaceutical; it was used in nuclear medicine studies.
Medical specialty concerned with the study of x-rays and their use in the diagnosis of disease. It includes other forms of energy, such as ultrasound in magnetic waves. Also called diagnostic radiology.
Permitting the passage of x-rays. Radiolucent structures appear black on x-ray images.
Radioactive form of an element that gives off energy in the form of radiation; radioisotope.
Obstructing the passage of x-rays. Radiopaque structures appear white on the x-ray images.
Radio active drug that is administrated safely for diagnostic and therapeutic purposes; a radiotracer. An example is technetium 99m, which combines with albumin (for lung perfusion) and DTPA (for renal imaging).
Image of an area, organ or tissue of the body obtained from ultrasonography, radioactive tracers studies, compute tomography or magnetic resonance imaging.
Diagnostic nuclear medicine test using radiopharmaceuticals and gamma cameras to create images.
Single photon emission computed tomography (SPECT)
Radioactive tracer is injected intravenously and computer reconstructs a 3-D image based on a composite of many views.
Radionuclides are used as tags, or labels, attached to chemicals and followed as they travel through the body.
Ultrasonography (US, U/S)
Diagnostic technique that projects in retrieves high-frequency sound waves as they echo all parts of the body.
Handheld device that sends and receives untrasound signals.
Rate of absorption of the radionuclide into an organ or tissue.
Ventilation perfusion studies
Radiopharmaceutical is inhaled and injected intravenously followed by an imaging in passage through the respiratory tract.
a repeated sound
process of recording