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- Title
Upper reference limits of transient ischemic dilation ratio for different protocols on new-generation cadmium zinc telluride cameras: A report from REFINE SPECT registry.
- Authors
Hu, Lien-Hsin; Sharir, Tali; Miller, Robert J. H.; Einstein, Andrew J.; Fish, Mathews B.; Ruddy, Terrence D.; Dorbala, Sharmila; Di Carli, Marcelo; Kaufmann, Philipp A.; Sinusas, Albert J.; Miller, Edward J.; Bateman, Timothy M.; Betancur, Julian; Germano, Guido; Liang, Joanna X.; Commandeur, Frederic; Azadani, Peyman N.; Gransar, Heidi; Otaki, Yuka; Tamarappoo, Balaji K.
- Abstract
<bold>Background: </bold>Upper reference limits for transient ischemic dilation (TID) have not been rigorously established for cadmium-zinc-telluride (CZT) camera systems. We aimed to derive TID limits for common myocardial perfusion imaging protocols utilizing a large, multicenter registry (REFINE SPECT).<bold>Methods: </bold>One thousand six hundred and seventy-two patients with low likelihood of coronary artery disease with normal perfusion findings were identified. Images were processed with Quantitative Perfusion SPECT software (Cedars-Sinai Medical Center, Los Angeles, CA). Non-attenuation-corrected, camera-, radiotracer-, and stress protocol-specific TID limits in supine position were derived from 97.5th percentile and mean + 2 standard deviations (SD). Reference limits were compared for different solid-state cameras (D-SPECT vs. Discovery), radiotracers (technetium-99m-sestamibi vs. tetrofosmin), different types of stress (exercise vs. four different vasodilator-based protocols), and different vasodilator-based protocols.<bold>Results: </bold>TID measurements did not follow Gaussian distribution in six out of eight subgroups. TID limits ranged from 1.18 to 1.52 (97.5th percentile) and 1.18 to 1.39 (mean + 2SD). No difference was noted between D-SPECT and Discovery cameras (P = 0.71) while differences between exercise and vasodilator-based protocols (adenosine, regadenoson, or regadenoson-walk) were noted (all P < 0.05).<bold>Conclusions: </bold>We used a multicenter registry to establish camera-, radiotracer-, and protocol-specific upper reference limits of TID for supine position on CZT camera systems. Reference limits did not differ between D-SPECT and Discovery camera.
- Subjects
CADMIUM zinc telluride; MYOCARDIAL perfusion imaging; SINGLE-photon emission computed tomography; CAMERAS; SUPINE position; RADIOACTIVE tracers; CADMIUM zinc telluride detectors
- Publication
Journal of Nuclear Cardiology, 2020, Vol 27, Issue 4, p1180
- ISSN
1071-3581
- Publication type
journal article
- DOI
10.1007/s12350-019-01730-y