Diagnostic yield
Amount of clinically useful information on a diagnostic image. Must outweigh the input factors of the procedure ordered. (Is the correct test being ordered?)
Competent imaging professionals will strive to maximize diagnostic yield using a minimum of _________ factors.
input
Diagnostic efficacy
Accuracy of diagnostic information on a medical image. (Did the test provide the information that was needed?)
Any extraneous information on an image that does not reflect the patient's true medical condition _________ from diagnostic efficacy
detracts
What is included in the X-Ray Machine Design Features?
X-ray tube and x-ray tube support Collimator assembly Radiographic table X-ray generator and control Upright image receptor
Tube is inside the lead-lined tube housing. The X-Ray tube is made of ________ glass with high vacuum. The tube produces x-radiation when high-energy electricity passes through. Then X-radiation exits the tube through a window in the housing and is directed toward a patient.
Pyrex
The ___________ _______________ Projects a high-intensity light field on the patient, which represents the area of the x-ray field exposure.
Collimator Assembly
Collimation May be manual or automatic (PBL). What does PBL stand for?
Positive beam limitation
The radiographic Tabletop is highly ______________.
radiolucent
Tilting radiographic tables will tilt from __________ to __________ to __________. These tables typically do not have variable _________ capabilities.(used in fluroscopy)
Horizontal Vertical upright Trendelenburg Height
Within the tabletop, radiographic grid oscillates during exposure to blur out the ________ ________ ________.
lead grid lines
The interface between the radiographer and electronics of the x-ray machine
Control console
Three key factors for exposure technique.
kVp mA Time
Facilitate easy and efficient positioning of the x-ray tube assembly around the patient in any orientation.
X-Ray Tube Supports
Overhead Tubecrane (OTC) motions.
Longitudinally Vertically Transversely
Receives remnant radiation from patient and captures the x-ray energy for processing.
Image Receptor
Image Receptor technology is classified as __________ or __________.
Cassette-based (CR) Cassette-less (DR)
Cassette-based receptor systems.
Film-screen Computed radiography (CR)
Systems that use thin-film technology (TFTs).
DR systems (Referred to as flat panel technology)
Only radiation that is of any clinical value.
Radiation absorbed by detector Radiation able to be converted to an image
Converts x-ray to light before converting it to an electrical signal.
Indirect digital detector technology Photostimulable Phosphor (PSP) storage-phosphor technology computed radiography (CR)
CR plates are extra sensitive to ______ energy radiation after they have been exposed.
low
Technology that converts an x-ray into an electrical signal.
Direct digital detector technology
________ technology has improved spatial resolution and lower patient dose. It is more dose efficient.
DR
Provides live, real-time images of patients using x-rays.
Fluoroscopy
Fluoroscopy performed in surgery is typically accomplished with __________.
Portable C-arm system
Commonly referred to as a "portable"
Mobile X-Ray Imaging