Erschienen in:
01.12.2017 | Technologist Corner
Patient-specific activity or scan-time in SPECT myocardial perfusion imaging: A hands-on approach
verfasst von:
J. D. van Dijk, MSc, PhD, P. L. Jager, PhD, MD, J. A. van Dalen, PhD
Erschienen in:
Journal of Nuclear Cardiology
|
Ausgabe 6/2017
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Excerpt
SPECT myocardial perfusion imaging (MPI) is the most validated non-invasive method to test for ischemia, and this procedure is performed over 15 to 20 million times annually.
1,
2 However, concerns have been raised as SPECT MPI is the single largest contributor to the radiation burden from medical imaging.
3 Several approaches to reduce this burden have been studied: stress-only protocols, encouraging appropriate use of MPI, hardware advances, new reconstruction methods, and patient-specific protocols. In our previous studies, we showed that by implementing a patient-specific activity or scan-time protocol, one can drastically lower the tracer activity while image quality becomes less dependent of patients’ size.
4 We also showed that such a protocol reduces the radiation dose, while the percentage of scans interpreted as normal and the prognostic value of these patients remains the same.
5 However, multiple logistic adoptions are required in clinical practice to implement such a protocol. In this note, we explain how to derive a patient-specific activity or scan-time formula, discuss the pros and cons of several patient-specific protocols, and highlight the practical implications when implementing such a protocol in clinical practice. …