You are seeing a free-to-access but limited selection of the activity Altmetric has collected about this research output.
Click here to find out more.
Mendeley readers
| Title |
Measurement of Radiotracer Concentration in Brain Gray Matter Using Positron Emission Tomography: MRI-Based Correction for Partial Volume Effects
|
|---|---|
| Published in |
Cerebrovascular and Brain Metabolism Reviews, June 2016
|
| DOI | 10.1038/jcbfm.1992.81 |
| Pubmed ID | |
| Authors |
Hans W. Müller-Gärtner, Jonathan M. Links, Jerry L. Prince, R. Nick Bryan, Elliot McVeigh, Jeffrey P. Leal, Christos Davatzikos, J. James Frost |
| Abstract |
Accuracy in in vivo quantitation of brain function with positron emission tomography (PET) has often been limited by partial volume effects. This limitation becomes prominent in studies of aging and degenerative brain diseases where partial volume effects vary with different degrees of atrophy. The present study describes how the actual gray matter (GM) tracer concentration can be estimated using an algorithm that relates the regional fraction of GM to partial volume effects. The regional fraction of GM was determined by magnetic resonance imaging (MRI). The procedure is designated as GM PET. In computer simulations and phantom studies, the GM PET algorithm permitted a 100% recovery of the actual tracer concentration in neocortical GM and hippocampus, irrespective of the GM volume. GM PET was applied in a test case of temporal lobe epilepsy revealing an increase in radiotracer activity in GM that was undetected in the PET image before correction for partial volume effects. In computer simulations, errors in the segmentation of GM and errors in registration of PET and MRI images resulted in less than 15% inaccuracy in the GM PET image. In conclusion, GM PET permits accurate determination of the actual radiotracer concentration in human brain GM in vivo. The method differentiates whether a change in the apparent radiotracer concentration reflects solely an alteration in GM volume or rather a change in radiotracer concentration per unit volume of GM. |
Mendeley readers
The data shown below were compiled from readership statistics for 234 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 2% |
| Germany | 2 | <1% |
| Australia | 1 | <1% |
| Ireland | 1 | <1% |
| Canada | 1 | <1% |
| Sweden | 1 | <1% |
| Unknown | 223 | 95% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 60 | 26% |
| Student > Ph. D. Student | 59 | 25% |
| Student > Master | 26 | 11% |
| Student > Bachelor | 10 | 4% |
| Other | 10 | 4% |
| Other | 35 | 15% |
| Unknown | 34 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 47 | 20% |
| Neuroscience | 39 | 17% |
| Engineering | 31 | 13% |
| Physics and Astronomy | 23 | 10% |
| Computer Science | 15 | 6% |
| Other | 34 | 15% |
| Unknown | 45 | 19% |