Turn on thread page Beta
    • Thread Starter
    Offline

    10
    ReputationRep:
    Explain why the speed of response of the detectors will affect the resolution of the image (i.e. the amount of detail that can be seen in the image).
    I have no idea on why the speed matters as long as their is a signal produced by the detectors.
    • Study Helper
    Online

    21
    ReputationRep:
    Study Helper
    (Original post by znx)
    Explain why the speed of response of the detectors will affect the resolution of the image (i.e. the amount of detail that can be seen in the image).
    I have no idea on why the speed matters as long as their is a signal produced by the detectors.
    Detection of emitted photons from the tracer-decay, must be localised by temporal-pairs of photons arriving at the detectors which are spatially displaced 1800 apart.

    The location of the decay is resolved by arrival of the photon pairs at the two detectors within a very tight time bounded window.

    Clearly, the tighter the time window, then the more accurate the location will be as well as improving the signal to noise of the image produced as a result of reducing false detections.

    The faster the detector can discriminate events, then the tighter the time window allowed to associate occurring pairs of photons, resulting in greater accuracy of imaging.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 22, 2018

University open days

  • University of Exeter
    Undergraduate Open Days - Exeter Campus Undergraduate
    Wed, 24 Oct '18
  • University of Bradford
    Faculty of Health Studies Postgraduate
    Wed, 24 Oct '18
  • Northumbria University
    All faculties Undergraduate
    Wed, 24 Oct '18
Poll
Who is most responsible for your success at university

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.