Types of Mobile Equipment Flashcards
What is a true portable unit?
- Truly portable, carry-able in two suitcases
- Separate parts to be rebuilt and reconnected
- Tube stand, base, rack and pinion, cross arm
- Tank construction of tube and HT circuit
- Control box, timer, meters, etc
- Low voltage multicore cabling
- Stationary anode tube, 1.5 mm focus
What are the advantages of a true portable unit?
- Cheap (appox. £5000) and simple
* Can be connected to a conventional 13A power supply
What are the disadvantages of a true portable unit?
- Long exposure times
* Time consuming to rebuild
What is a conventional mains dependent unit?
- 5 wheels, motor driven forward and reverse,
- Drive power from 12 V car batteries
- disc brakes
- antitamper lock and key
- weight 408 kg
- cable compartment with 10 m of mains cable
What are the advantages of a conventional mains dependent unit?
- High output
- Very flexible and manoeuvrable
- Motorised
What are the disadvantages of conventional mains dependent units?
- Limited to 30 A power outlets
* Expensive, approx £15,000
What are the advantages of a high frequency mains dependent mobile unit?
- Small, light and compact
- very manouverable
- very simple controls
- reasonable price £8,500
What are the disadvantages of a high frequency mains dependent mobile unit?
- middle range output at 5.6 kW
What are the advantages of a capacitor discharge mobile unit?
- Reasonable output
* usable with any old 13 A supply
What are the disadvantages of a capacitor discharge mobile unit?
- Discharge waveform means that the end of the exposure is at a lower potential
- Limitations in high mAs and techniques might have to be modified
- Expensive, approx £25,000
What are the advantages of a mains independent (battery) mobile unit?
- Total independence of power supply for daily working
* High exposure output
What are the disadvantages of a mains independent (battery) mobile unit?
- Expensive, approx £26,000
* Batteries don’t seem to last long, approx 18 months
What are the advantages of a digital mobile radiography system?
- Images can be evaluated immediately after exposure
- repeats can be instantly retaken
- Immediate information before taking next image or step
- Images can already be labelled to patient’s information
- Images can be quickly sent to PACS afterward