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Attenuation correction for three-dimensional PET using uncollimated flood-source transmission measurements
| Content Provider | Scilit |
|---|---|
| Author | McKee, B. T. A. Hiltz, L. G. |
| Copyright Year | 1994 |
| Description | Journal: Physics in Medicine & Biology An attenuation-correction method for three-dimensional PET imaging, which obtains attenuation-correction factors from transmission measurements using an uncollimated flood source, is described. This correction is demonstrated for two different phantoms using transmission data acquired with QPET, a rotating imaging system with two planar detectors developed for imaging small volumes. The scatter amplitude in the transmission projections was a maximum of 30%; to obtain accurate attenuation-correction factors the scatter distribution was first calculated and subtracted. The attenuation-corrected emission images for both phantoms indicate that their original uniform amplitudes have been restored. The attenuation correction adds only a small amount of noise to the emission images, as evaluated from the standard deviation over a central region. For the first phantom, with maximum attenuation of 48%, the noise added was 2.6%. The second phantom was attenuated by a maximum of 37%, and 1.9% noise was added. Because the transmission data are smoothed, some artifacts are visible at the edges of the phantom where the correction factors change abruptly within the emission image. |
| Related Links | http://iopscience.iop.org/article/10.1088/0031-9155/39/11/015/pdf |
| Ending Page | 2058 |
| Page Count | 16 |
| Starting Page | 2043 |
| ISSN | 00319155 |
| e-ISSN | 13616560 |
| DOI | 10.1088/0031-9155/39/11/015 |
| Journal | Physics in Medicine & Biology |
| Issue Number | 11 |
| Volume Number | 39 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1994-11-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Physics in Medicine & Biology Radiology, Nuclear Medicine and Imaging Attenuation Correction Uncollimated Flood Flood Source Dimensional Pet Transmission Measurements Correction Factors Scatter Amplitude |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology |
