(patient care chapter 8)
-the main power
-rotor exposure switch
the penetration power of an x ray bean is determined by its voltage and is expressed as kvp. Voltage in radiography can range from 30 to 150 KVp. The correct KVp can vary based on patient thickens, body part and examination type.
indicated the amount of current supplied to the x ray tube. most diagnostic radiography is done at 50 to 400 MA
the device that begins the exposure is called the rotor exposure switch, it cause the anode to rotate and prepares the x ray tube for the exposure factor that have been selected. manual exposure are typically used with tabletop.
has simplified exposure technique selection and improves the consistency of image quality, particularly between technologist and equipment
x ray tube support systems come into 2 distinct designs
-floor mounted tubestand
-ceiling suspended overhead tubercranes
consist of vertically column that runs along a longitudinal rail mounted floor
ovehead tubecrane (OTC)
are the most sophisticated designs and standard of care in hospital and large clinics. it include the capability of setting exposure factors at the tube head.
the purpose of an imagen receptor is to absorb the energies of the exray beam and convert this energy into a for that can be stored, processed and ultimately viewed by some for medical interpretation
as low reasonable achievable. over exposure that is 100 % about the optimum exposure should be considered a ALARA violation
photostimulable phosphor technology (PSP)
commonly referred to as computer radiography (CR). PSP imagen uses a reusable imaging plate, enclosed in a cassette. it cassette is inserted in a reader device .`
Digital radiography technology (DR)
the greatest advantage of DR technology are its lower dose and better spatial resolution.
the xray bean is directly converted intro electronic digital signalto be used by the computer
is the more popular in the market because is less expensive and manufacturing consistency and is the technology choose for flat panel fluoroscopy
for study of dynamic action of human body,real time images are created, showing internal activities and process. commonly referred as R/F system
THE tower of the fluoroscopy
consist of a sophisticated imagen intensifier tube attached to a spot film carriage platform.
is a complex computer network that is typically part of a larger hospital information system.
is a radiography procedure that acquire as many as 60 low dose projection images during a single x ray tube detector of "sweep" of the patient and with a single breath hold
Dual energy subtraction radiography
this feature will permit 2 exposure to be taken of a patients anatomy, one a very low kvp and the other at a high kvp