Reducing Bladder Artifacts in Clinical Pelvic SPECT Images
R. Glenn Wells, PhD1,2,3,
Troy Farncombe, PhD4,
Edward Chang, MD5 and
R. Larry Nicholson, MD1,2,3
1 Department of Nuclear Medicine, St. Joseph’s Health Care, London, Ontario, Canada
2 Department of Diagnostic Radiology and Nuclear Medicine, University of Western Ontario, London, Ontario, Canada
3 Lawson Health Research Institute, London, Ontario, Canada
4 Department of Nuclear Medicine, McMaster University, Hamilton, Ontario, Canada
5 Department of Nuclear Medicine, Hôtel Dieu-Grace Hospital, Windsor, Ontario, Canada
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FIGURE 1. Transaxial slices of an FBP-reconstructed image showing typical positions for the ROIs used to contrast the streak artifact (upper ROI) with the bone (lower ROI).
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FIGURE 2. Transaxial slices showing an asymptomatic patient with a 173% change in bladder activity. Reconstruction is with FBP (A), RBI no AC (B), RBI AC (C), and dSPECT (D).
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FIGURE 3. Transaxial slices showing a patient with left hip pain and a 77% change in bladder activity. Reconstruction is with FBP (A), RBI no AC (B), RBI AC (C), and dSPECT (D).
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FIGURE 4. Transaxial slices showing a patient with metastatic bone disease and an 88% change in bladder activity. Each row corresponds to 3 consecutive slices of a different reconstruction.
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FIGURE 5. Whole-body bone scan of the patient shown in Figure 4 indicating a bone lesion near the bladder. Anterior (A) and posterior (B) views are shown.
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FIGURE 6. Streak-to-bone contrast ranked according to the change in activity in the bladder seen during the data acquisition.
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Copyright © 2004 by the Society of Nuclear Medicine.
