Transcript Technically Speaking

Technically Speaking – It’s All About
Quality
Gee Mom How Did You Get That
Artifact?
What’s It All About? Image Quality
As a technologist you are directly
responsible for all the technical
aspects
– Patient History
– Dose preparation/correct
radiopharmaceutical
– Defining the correct imaging parameters
– Image quantification
– End result = image quality
Show Me Fog!
• Dynamic images are
taken in a GI Reflux
exam
• Initial images show
the stomach
• Second set identifies
additional active
• Your thoughts?
What’s A Drift?
• Spot views of a bone scan
are taken two hours post
dose
• The upper set of images
identify abnormal
changes in intensity in the
spine that do not correlate
with one another
• The lower set has
corrected for this defect
• What’s cookin?
Its Not PE – So What Is It?
• LLAT indicates PE
• PE defect is not seen
in the LPO
• What might cause this
defect?
• Lesson - Always look
for the correlation in
an image
Does The Whole Body Bone
Have Multiple Hot Spots?
• Whole body bone scan
indicates metastatic
disease
• What if the flood
shows abnormalities?
• How would that effect
your image quality on
a WB Bone Scan?
• Next page
Take a Look At Your Flood !
• Intrinsic floods where
taken
• Could these floods
cause the poor image
quality seen the WB
Bone?
• Next page
Does This Image Look Normal?
• GI Bleeding study
• What’s wrong with
this image?
• And the lesson is?
What’s In The Photopenic Area?
• Spot views of a
delayed bone scan are
taken
• Huston – Is there a
problem?
• What is it?
Can You Even Tell What It Is?
• This is a 2 hour image
of the injection site in
a cisternogram
• In111DPTA is in the
spine
• So what ever
happened to image
qulaity?
High Energy And Too Much Activity
• This is a Whole Body
I131 scan
• 100 mCi and 72 hours
later revealed the
following image
• Image shows
– Biodistribution of I131
– Star artifact
• Ray of the star can
interfere with image
interpretation
• So what can you do about
it?
Urine In – Your Out
• It’s a bone scan
• What caused this
defect?
• How should this
situation be dealt
with?
Yet Another Few Hot Spots
• What are these hot
spots?
• Is it in the bone or
not?
• Do additional images
need to be taken?
It’s Suppose To Just Be a Lung Perfusion Scan
• 4 mCi of Tc99mMAA
was administered IV
• Is this normal
biodistribution?
• Is this particle
breakdown?
Aerosol Ventilation Lacks Quality
• Radioaerosol indicates
excessive background
• What might be the
cause?
• How can you prevent
this in the future?
Bone Scintigraphy – Lacks Uptake
• Patient has undergone
radiation therapy
• Can you find therapy
site?
• What do you know about
this phenomenon?
The Fliperizer
• Serial imaging is taken
of the hepatobiliary
system
• What might have
caused this
abnormality?
Radiopharmaceutical To
Pharmaceutical Interaction
• Patient was injected
with 20 mCi of
Tc99mMDP
• Hyperparathyroidism
• Lungs and stomach
uptake?
Gastric Reflux Abnormality
• 500 uCi of Tc99mSC
is administered IV
• Is there anything
abnormal noted in the
exam?
• What causes the
abnormality?
End of Lecture
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