b) Consider the thyroid uptake study shown below. 10 MBq of I-123 was administered to the patient at time tadm and the t

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B Consider The Thyroid Uptake Study Shown Below 10 Mbq Of I 123 Was Administered To The Patient At Time Tadm And The T 1 (192.23 KiB) Viewed 73 times

b) Consider the thyroid uptake study shown below. 10 MBq of I-123 was administered to the patient at time tadm and the thyroid was imaged for 10 minutes at time to. An aliquot containing 10 MB of l-123 at tadm was then imaged for 10 minutes, 2 hours later. Regions of interest (ROIS) were drawn around the thyroid and aliquot. Background regions were drawn on each image. (t1/2 l-123 = 13 hours). Calculate the percentage uptake of the thyroid. [7] Thyroid Aliquot Counts in ROI 33400 206700 Area of ROI 1933 1430 Counts in background region 1180 6530 Area of background region 794 794 c) Discuss the advantages of using an automated method for drawing regions of interest (ROIS) rather than a manual method. When might an automated method not work? [3] d) Describe, the image acquisition and processing techniques you would use to investigate the function of the kidneys from a dynamic series of gamma camera images following an injection of Tc-99m MAG3. What functional parameters can be derived from this study? [7] e) Name two other examples of dynamic studies used in gamma camera nuclear medicine. [1]