Implementation of a combined X-ray CT-scintillation camera imaging system for localizing and measuring radionuclide uptake: experiments in phantoms and patients
| Autor: | A.J. Da Silva, J.K. Brown, H.R. Tang, Randy Hawkins, Bruce H. Hasegawa, John P. Huberty, Katherine K. Matthay, David C. Price |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Nuclear and High Energy Physics Scanner Accuracy and precision Scintillation medicine.medical_specialty Image registration Imaging phantom Nuclear Energy and Engineering Scintillation counter Medical imaging medicine Medical physics Electrical and Electronic Engineering Image resolution Biomedical engineering |
| Zdroj: | IEEE Transactions on Nuclear Science. 46:551-557 |
| ISSN: | 1558-1578 0018-9499 |
| DOI: | 10.1109/23.775578 |
| Popis: | We have developed and demonstrated an imaging system that couples an X-ray CT scanner to a scintillation camera for the localization and absolute measurement of radionuclide uptake. We use the registered CT images to provide physical information to overcome the quantitative errors in nuclear imaging due to attenuation, scatter, and limited spatial resolution. The registration accuracy and precision in phantom experiments was 0.0/spl plusmn/0.4 mm. Preliminary patient scans suggest that the registration techniques developed for phantom studies can be used. Conversion of X-ray CT image data to attenuation maps was accomplished by the scaling of calibration data and includes extensions to account for the presence of iodinated contrast agents. Experimental phantom studies show absolute quantitation with less than 10% error for up to 2:1 target:background activity concentration for objects as small as 2.7 ml. We are evaluating the localization and absolute quantitation of /sup 131/I-MIBG in neuroblastoma patients to determine if the techniques improve correlation between tumor dose and response. |
| Databáze: | OpenAIRE |
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