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When does a Medical Physicist need to become involved in Evaluations of Equipment Adjustments, Changes, or Repairs?

 

  • Newly Installed X-Ray unit (even if it is used equipment)

  • Newly Installed processor (even if it is used equipment)

  • X-ray unit or processor disassembled and reassembled at the same or new location

  • X-ray tube replacement

  • Collimator replacement

  • Filter replacement

  • AEC replacement

  • New Cassettes

Important Definitions:

MP Oversite= verification may be accomplished by a qualified individual other than the medical physicist. The medical physicist should be consulted as to whether an on-site visit is required or if other personnel can verify the standards are being met, with direction from the medical physicist via telephone or printed material from the physicist.

Qualified Individual = ie: radiolgic technologist or service representative with appropriate training/experience.

Adjustments, Changes, or Repairs

Major Adjustment?

Medical Physicist Involvement

AEC    
AEC Replacement  Y MP conducts evaluation in person
Thickness compensation internal adjustment  N MP Oversite
AEC Sensor Replacement  Y MP conducts evaluation in person
AEC Circuit board replacement  Y MP conducts evaluation in person
Density control-internam adjustment   N MP Oversite
Bucky (new to facility) Replacement    
AEC sensor also replaced  Y MP conducts evaluation in person
AEC sensor not replaced  N MP Oversite
Cassette Replacement    
Same screen speed  N MP Oversite
Different screen speed  N MP Oversite
Collimator    
Replacement  Y MP conducts evaluation in person
Reassembly with blade replacement   Y MP conducts evaluation in person
Adjustment  N MP Oversite
Compression Device    
Pressure adjustment  N MP Oversite
Thickness scale accuracy adjustment but only if it affects AEC performance N MP Oversite
Repair of auto decompression  N MP Oversite
Compression Paddle    
Paddle (new to facility) replacement   N MP Oversite
Deflection adjustment  N MP Oversite
Adjustment due to extension beyond allowable limit, or visibility on images N MP Oversite
Darkroom    
Repair of light leaks  N MP Oversite
Safe light change  N MP Oversite
Film type change N MP Oversite
Filter Replacement Y MP conducts evaluation in person
Processor    
Chemistry type change  N MP Oversite
Fixer/Developer replacement  N MP Oversite
Installation  Y MP conducts evaluation in person
Reassembly  Y MP conducts evaluation in person
Replenishment rate adjustment  N MP Oversite
Roller replacement  N MP Oversite
X-ray Unit    
kVp, mA or time internal adjustments   N MP Oversite
High voltage generator replacement   Y MP conducts evaluation in person
X-ray tube replacement  Y MP conducts evaluation in person
Installation  Y MP conducts evaluation in person
Reassembly  Y MP conducts evaluation in person
Manufacturer's software modifications   Y MP conducts evaluation in person

 

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