Monday, November 24, 2008
An invaluable resource for both SPECT and planar gamma cameras is the article Routine Quality Control of Clinical Nuclear Medicine Instrumentation: A Brief Review in the Journal of Nuclear Medicine. It is written with an audience of technologists in mind.
Posted by David S. Graff PhD at 4:53 PM
Sunday, November 23, 2008
I put this at the bottom of the previous post, but you might have missed it.
Some of the material in my lecture is not in the book and won't be on the homework. Here is an additional homework problem to ensure that you understand it:
A radiologist reading an image and searching for skin cancer learns that the patient has a family history of skin cancer. How do you think this will affect her interpretation of a lesion which may or may not be skin cancer? Describe how this knowledge could increase or decrease her sensivity and selectivity and why. Show these changes in an R.O.C. graph.See also the Wikipedia pages on Sensitivity and Specificity and Receiver Operating Characteristic (R.O.C.) Function.
Posted by David S. Graff PhD at 7:47 AM
Friday, November 21, 2008
Gamma Camera Image Quality
A radiologist reading an image and searching for skin cancer learns that the patient has a family history of skin cancer. Describe how this knowledge could increase or decrease her sensivity and selectivity and why.
Posted by David S. Graff PhD at 6:55 PM
Thursday, November 20, 2008
- From the IAEA: Diagnostic Nuclear Medicine - Image Quality and Quality Control
- From Harvard: Physical Characteristics of Nuclear Medicine Images (more detail than IAEA, but still not too technical)
- A short course in image quality with applications to Nuclear Medicine (state of the art, but very technical)
- Wikipedia pages on MTF, PSF, Poisson statistics, shot noise, signal to noise ratio
Many of the terms that we use to describe image quality are quite general and can be used to describe the quality of any two-dimensional image, not just those from a gamma camera. The online book The Joy of Visual Perception discusses many of these functions. See especially the chapter on Point and Line spread functions and Modulation Transfer Functions and click through the links.
Posted by David S. Graff PhD at 8:54 AM
Here are some links that I use to look stuff up.
Nudat 2 is a compendium of facts about every isotope including half-lives, decay radiation and decay pathways.
Physics.nist.gov maintains tables of stopping power, X-ray attenuation coefficients, photon cross sections, and many other useful constants.
Posted by David S. Graff PhD at 7:38 AM
Tuesday, November 18, 2008
Posted by David S. Graff PhD at 2:46 PM