Positron emission tomography | 合法醫療器材資訊網

Positronemissiontomography(PET)isamodernnon-invasiveimagingtechniqueforquantificationofradioactivityinvivo.Itinvolvestheintravenousinjectionof ...

Positron emission tomography (PET) is a modern non-invasive imaging technique for quantification of radioactivity in vivo. It involves the intravenous injection of a positron-emitting radiopharmaceutical, waiting to allow for systemic distribution, and then scanning for detection and quantification of patterns of radiopharmaceutical accumulation in the body.

As with SPECT[1] imaging, PET scan data can be reconstructed and displayed as a three-dimensional image. This is in contrast to scintigraphy[2], which yields planar data which can only be used to create a two-dimensional image.

Although the physiologic information afforded by PET and SPECT imaging is invaluable, the quality of obtained data is poor/noisy and limits imaging spatial resolution. For this reason, PET and SPECT scans are often combined with CT imaging, allowing correlation between functional and anatomical ...