Assessing the Accuracy of Region of Interest Drawing by Radiological Technology Students for Determining Left Ventricular Function Values in Nuclear Medicine
Accuracy of ROI Drawing for Left Ventricular Function Assessment
Keywords:
Left ventricular ejection fraction, Accuracy of ROI drawing, Radiological technology studentAbstract
Multiple-gated acquisition (MUGA) scans have been utilized to assess left ventricular ejection fraction (LVEF) values. Variations in region of interest (ROI) delineation by different technologists can impact LVEF results. This study investigated the intra-reliability and inter-reliability of ROI
delineation. The percentage of LVEF was calculated from the patient,s left ventricular function imaging using a semi-automated method. Means, standard deviations, intraclass correlation coefficients (ICC), and Bland-Altman plots were generated using SPSS software. Intraclass correlation for intra-rater reliability (ICC(3,1)) ranged from 0.94 to 0.95, and that for inter-rater reliability (ICC(2,1)) was 0.88 to 0.89. The Bland-Altman plots revealed mean differences in three ROI drawings: 0.84, 1.49, and 1.66. The calculated mean LVEF values obtained by radiological technology students were correlated with the standard values based on the ROI drawings, with correlation coefficients of 0.92 and 0.87. This study demonstrated that adequately trained radiological technology students could reliably draw ROIs for LVEF
calculation in patients undergoing MUGA scan. The acceptable inter-rater reliability between the two students and the LVEF values were similar to those of experts supported this conclusion. The findings suggested that well-trained new technologists or radiological technology students can effectively contribute to MUGA analysis, potentially alleviating workload pressures on expert technologists.
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