Audit report on Ida County, Iowa for the year ended June 30, 2006.

Audit report on Ida County, Iowa for the year ended June 30, 2006.

Audit report on Appanoose County, Iowa for the year ended June 30, 2006.

Audit report on Appanoose County, Iowa for the year ended June 30, 2006.

Audit report on Jasper County, Iowa for the year ended June 30, 2006.

Audit report on Jasper County, Iowa for the year ended June 30, 2006.

Audit report on Poweshiek County, Iowa for the year ended June 30, 2006.

Audit report on Poweshiek County, Iowa for the year ended June 30, 2006.

Audit report on the Hardin County Sanitary Solid Waste Disposal Commission for the year ended June 30, 2006.

Audit report on the Hardin County Sanitary Solid Waste Disposal Commission for the year ended June 30, 2006.

Audit report on the Westory Fire Agency for the year ended June 30, 2006.

Audit report on the Westory Fire Agency for the year ended June 30, 2006.

Audit report on Boone County, Iowa for the year ended June 30, 2006

Audit report on Boone County, Iowa for the year ended June 30, 2006.

Audit report on the City of Red Oak, Iowa for the year ended June 30, 2006

Audit report on the City of Red Oak, Iowa for the year ended June 30, 2006.

Audit report on the City of Elk Run Heights, Iowa for the year ended June 30, 2006

Audit report on the City of Elk Run Heights, Iowa for the year ended June 30, 2006.

Audit report on the Rural Iowa Waste Management Association for the year ended June 30, 2006

Audit report on the Rural Iowa Waste Management Association for the year ended June 30, 2006.

Influence of reconstruction parameters during filtered backprojection and ordered-subset expectation maximization in the measurement of the left-ventricular volumes and function during gated SPECT.

A crucial method for investigating patients with coronary artery disease (CAD) is the calculation of the left ventricular ejection fraction (LVEF). It is, consequently, imperative to precisely estimate the value of LVEF--a process that can be done with myocardial perfusion scintigraphy. Therefore, the present study aimed to establish and compare the estimation performance of the quantitative parameters of the reconstruction methods filtered backprojection (FBP) and ordered-subset expectation maximization (OSEM). METHODS: A beating-heart phantom with known values of end-diastolic volume, end-systolic volume, and LVEF was used. Quantitative gated SPECT/quantitative perfusion SPECT software was used to obtain these quantitative parameters in a semiautomatic mode. The Butterworth filter was used in FBP, with the cutoff frequencies between 0.2 and 0.8 cycles per pixel combined with the orders of 5, 10, 15, and 20. Sixty-three reconstructions were performed using 2, 4, 6, 8, 10, 12, and 16 OSEM subsets, combined with several iterations: 2, 4, 6, 8, 10, 12, 16, 32, and 64. RESULTS: With FBP, the values of end-diastolic, end-systolic, and the stroke volumes rise as the cutoff frequency increases, whereas the value of LVEF diminishes. This same pattern is verified with the OSEM reconstruction. However, with OSEM there is a more precise estimation of the quantitative parameters, especially with the combinations 2 iterations × 10 subsets and 2 iterations × 12 subsets. CONCLUSION: The OSEM reconstruction presents better estimations of the quantitative parameters than does FBP. This study recommends the use of 2 iterations with 10 or 12 subsets for OSEM and a cutoff frequency of 0.5 cycles per pixel with the orders 5, 10, or 15 for FBP as the best estimations for the left ventricular volumes and ejection fraction quantification in myocardial perfusion scintigraphy.

Audit report on the Black Hawk County Criminal Justice Information System for the year ended June 30, 2006

Audit report on the Black Hawk County Criminal Justice Information System for the year ended June 30, 2006

Audit report on the Northeast Iowa Schools Insurance Trust for the year ended June 30, 2006

Audit report on the Northeast Iowa Schools Insurance Trust for the year ended June 30, 2006

Audit report on the City of Denison, Iowa for the year ended June 30, 2006

Audit report on the City of Denison, Iowa for the year ended June 30, 2006

Audit report on the City of Dyersville, Iowa for the year ended June 30, 2006

Audit report on the City of Dyersville, Iowa for the year ended June 30, 2006