Standard Study

 

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It is assumed that the standard QA checks have been carried out (daily flood, check on Tc99m and Kr81m windows, correct collimator etc) and a reservoir breathing system has been set up

Suggested Protocol
  1. Inject the patient with Tc99m MAA , (up to 100MBq in UK). We recommend this is carried out with the patient in the same orientation as the imaging

  2. If the patient is anxious or elderly then it may help before the study to get the patient to take a few breaths through the facemask (without Kr81m) so that they are aware of how it feels.

  3. Position the patient for a posterior view using the Tc99m window

  4. Collect 400k counts on128x128 image

  5. Without moving the patient, get the patient to firmly hold the face mask for Kr81m and remind them to breath normally in and out through their mouth. Visually check that the reservoir tubing and mask are out of the field of view of the camera and switch to the Kr81m window on the camera

  6.   Start the acquisition a few seconds before starting the generator flow and collect 400k counts on128x128 image

  7. switch off the generator and select the Tc99m window.

  8. repeat steps 3 -7 for left posterior oblique, right posterior oblique and anterior views

 

 

 

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Last modified: November 29, 2002