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001-es BibID:BIBFORM110191
035-os BibID:(cikkazonosító)24 (wos)000957376600001 (scopus)85150973802
Első szerző:Krizsán Áron Krisztián (fizikus)
Cím:Performance evaluation of a novel multi-pinhole collimator on triple-NaI-detector SPECT/CT for dedicated myocardial imaging / Krizsan Aron K., Kukuts Kornel, Al-Muhanna Walid, Szoboszlai Zoltan, Balazs Laszlo, Szabo Balazs, Kiss Janos, Nekolla Stephan, Barna Sandor, Garai Ildiko, Bukki Tamas, Forgacs Attila
Dátum:2023
ISSN:2197-7364
Megjegyzések:Background: In this study we evaluated the imaging capabilities of a novel Multipinhole collimator (MPH-Cardiac) specially designed for nuclear cardiology imaging on a Triple-NaI-detector based SPECT/CT system. Methods: 99mTc point source measurements covering the field of view (FOV) were used to determine tomographic sensitivity ( TSpointsource) and spatial resolution. Organsize tomographic sensitivity ( TSorgan) was measured with a left ventricle (LV) phantom filled with typical myocardial activity of a patient scan. Reconstructed image uniformity was measured with a 140 mm diameter uniform cylinder phantom. Using the LV phantom once filled with 99mTc and after with 123I, Contrast-to-noise ratio (CNR) was measured on the reconstructed images by ROI analysis on the myocardium activity and on the LV cavity. Furthermore, a polar map analysis was performed determining Spill-Over-Ratio in water ( SORwater) and image noise. The results were compared with that of a dual-head parallel-hole low energy high resolution (LEHR) collimator system. A patient with suspected coronary artery disease (CAD) was scanned on the LEHR system using local protocol of 16 min total acquisition time, followed by a 4-min MPH-Cardiac scan. Results: Peak TSpointsource was found to be 1013 cps/MBq in the axial center of the FOV while it was decreasing toward the radial edges. TSorgan in the CFOV was found to be 134 cps/MBq and 700 cps/MBq for the LEHR and MPH-Cardiac, respectively. Average spatial resolution throughout the FOV was 4.38 mm FWHM for the MPH-Cardiac collimator. Reconstructed image uniformity values were found to be 0.292% versus 0.214% for the LEHR and MPH-Cardiac measurements, respectively. CNR was found to be higher in case of MPH-Cardiac than for LEHR in case of 99mTc (15.5 vs. 11.7) as well as for 123I (13.5 vs. 8.3). SORwater values were found to be 28.83% and 21.1% for the 99mTc measurements, and 31.44% and 24.33% for the 123I measurements for LEHR and MPHCardiac, respectively. Pixel noise of the 99mTc polar maps resulted in values of 0.38% and 0.24% and of the 123I polar maps 0.62% and 0.21% for LEHR and MPH-Cardiac, respectively. Visually interpreting the patient scan images, MPH-Cardiac resulted in better image contrast compared to the LEHR technique with four times shorter scan duration.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:EJNMMI Physics. - 10 : 1 (2023), p. 1-16. -
További szerzők:Kukuts Kornél Al-Muhanna, Walid Szoboszlai Zoltán (1980-) (fizikus) Balázs László (fizikus) Szabó Balázs (1991-) (általános orvos) Kiss János (1992-) (fizikus) Nekolla, Stephan Barna Sándor (1982-) (kutató orvos) Garai Ildikó (1966-) (radiológus) Bükki Tamás Forgács Attila (1985-) (fizikus)
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