I had an angiogram last month which showed a 70% occlusion in the mid LAD, at least according to the doctor who did it.
Giving the CDROM to a second cardiologist he said that "the occlusion is probably below 70%". A third one "felt the occlusion is much less". He even put the CDROM in a "new digital machine that estimates accurately and independent from the observer". The outcome was a 53% occlusion estimation!
Well, what is the truth? Are these discrepancies justified? Is there really a computer to do the estimation 'accurately' and independent of the human factor?
PA <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:
I had an angiogram last month which showed a 70% occlusion in the mid LAD, at least according to the doctor who did it.
Giving the CDROM to a second cardiologist he said that "the occlusion is probably below 70%". A third one "felt the occlusion is much less". He even put the CDROM in a "new digital machine that estimates accurately and independent from the observer". The outcome was a 53% occlusion estimation!
Well, what is the truth?
You got three different opinions.
The truth is that you have coronary disease that is occlusive enough to cause symptoms.
Quoted message said:
Are these discrepancies justified?
As justified as opinions.
Quoted message said:
Is there really a computer to do the estimation 'accurately' and independent of the human factor?
A human presumably wrote the program. The greatest source of error is picking the "normal" area to call 0% (no atheroclerosis). The programs that I am familiar with still require the operator pick out the place to call 0% which will be compared to the blockage that is of interest.
PA <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:
I had an angiogram last month which showed a 70% occlusion in the mid LAD, at least according to the doctor who did it.
Giving the CDROM to a second cardiologist he said that "the occlusion is probably below 70%". A third one "felt the occlusion is much less". He even put the CDROM in a "new digital machine that estimates accurately and independent from the observer". The outcome was a 53% occlusion estimation!
Well, what is the truth?
Quoted message said:
You got three different opinions.
Quoted message said:
The truth is that you have coronary disease that is occlusive enough to cause symptoms.
Quoted message said:
Quoted message said:
Are these discrepancies justified?
Quoted message said:
As justified as opinions.
Quoted message said:
Quoted message said:
Is there really a computer to do the estimation 'accurately' and independent of the human factor?
Quoted message said:
A human presumably wrote the program. The greatest source of error is picking the "normal" area to call 0% (no atheroclerosis). The programs that I am familiar with still require the operator pick out the place to call 0% which will be compared to the blockage that is of interest.
Does the program integrate images taken from various angles?
A plaque may build on on side of a vessel, and so depending on the angle of the x-ray it will appear more or less narrowing.
Does any software integrate calcium density measurement with angiogram?
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Why did you have the angiogram in the first place?
Colin Rose MD
PA said:
I had an angiogram last month which showed a 70% occlusion in the mid LAD, at least according to the doctor who did it.
Giving the CDROM to a second cardiologist he said that "the occlusion is probably below 70%". A third one "felt the occlusion is much less". He even put the CDROM in a "new digital machine that estimates accurately and independent from the observer". The outcome was a 53% occlusion estimation!
Well, what is the truth? Are these discrepancies justified? Is there really a computer to do the estimation 'accurately' and independent of the human factor?
Brian Sandle <[email hidden]> wrote in message news:<[email hidden]>...
Quoted message said:
Quoted message said:
A plaque may build on on side of a vessel, and so depending on the angle of the x-ray it will appear more or less narrowing.
Quoted message said:
Correct.
Quoted message said:
Does any software integrate calcium density measurement with angiogram?
Quoted message said:
No.
From ask.com
CORONARY ANGIOGRAMS CORONARY ANGIOGRAMS. APPENDIX X. READING CORONARY ANGIOGRAMS - A PRIMER. This short course is designed to orient you to read coronary angiograms. From:ctcc.cpmc.columbia.edu/cabgpatch/opman/app10.html
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