title: Myocardial perfusion imaging parameters: IQ-SPECT and conventional SPET system comparison.
abstract: Technological advancement in hardware and software development in myocardial perfusion imaging (MPI) leads to the shortening of acquisition time and reduction of the radiation burden to patients. We compared semiquantitative perfusion results and functional parameters of the left ventricle between new dedicated cardiac system with astigmatic collimators called IQ-SPECT (Siemens Medical Solutions, USA) and conventional single photon emission tomography (SPET) system equipped with standard low energy high resolution collimators. A group of randomly selected 81 patients underwent consecutively the MPI procedure on IQ-SPECT and on conventional SPET systen, both without attenuation correction. The summed scores and the values of the functional parameters of the left ventricle: ejection fraction (EF), end-systolic and end-diastolic volumes (ESV, EDV) received from the automatic analysis software were compared and statistically analyzed. Our results showed that summed scores values were significantly higher for the IQ-SPECT system in comparison to the conventional one. Calculated EF were significantly lower for IQ-SPECT, whereas evaluated left ventricular volumes (LVV) were significantly higher for this system. In conclusion, we recorded significant differences in automatically calculated semiquantitative perfusion and functional parameters when compared uncorrected studies obtained by the IQ-SPECT with the conventional SPET system.
authors.affiliation: Department of Nuclear Medicine, University Hospital Ostrava, Ostrava, 708 52, Czech Republic. havel.martin@gmail.com.
authors.forename: Martin
authors.initials: M
authors.lastname: Havel
authors.forename: Michal
authors.initials: M
authors.lastname: Kolacek
authors.forename: Milan
authors.initials: M
authors.lastname: Kaminek
authors.forename: Vladimir
authors.initials: V
authors.lastname: Dedek
authors.forename: Otakar
authors.initials: O
authors.lastname: Kraft
authors.forename: Pavel
authors.initials: P
authors.lastname: Sirucek
mesh_terms: D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D003324:Coronary Artery Disease / Q000150:complications / Q000000981:diagnostic imaging*; D005080:Exercise Test; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male; D008875:Middle Aged; D055414:Myocardial Perfusion Imaging / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013318:Stroke Volume; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000209:etiology