Thesis

46 Part I Chapter 2 Table 2. (continued) Knee Static blood pool Static delayed‡ SPECT/CT§ Indication • Routinely recommended • Also consider early phase SPECT/CT might be helpful in inflammation and/or infection Indication Benign and malignant tumors, orthopedic (arthroplasty, osteoarthritis, etc), infection, inflammation, postoperative assessment, problem solving in equivocal conventional imaging Indication • If planar imaging is nondiagnostic, usually late phase SPECT/CT • Particularly useful for the evaluation of knee prosthesis Acquisition • Anterior and posterior images • 256 x 256 matrix • LEHR or LEGP collimators • 2-5 minutes per view Acquisition • Anterior and posterior images • Lateral images • 256 x 256 matrix • LEHR collimators • 5 minutes/ 500 kcts per view. This may depend on how full the bladder is for example. Acquisition SPECT • LEHR collimators, Matrix 128 x 128 • 128 angles, 20 seconds/angle • Step mode, Non-circular rotation Attenuation correction/ localization CT • 2.5 – 40 mA, 80 – 130 keV • 1 – 5 mm slice thickness Diagnostic CT • 40 – 335 mA, 80 – 130 keV • 0.33 – 2.0 mm slice thickness Spine Static blood pool Static delayed‡ SPECT/CT§ Indication • Radiological inconclusive result for fracture with red flags • Suspicion of infection, including spondylitis and spondylodiscitis • In case of likely fractures to discriminate recent from old fracture • In the post-surgery setting (with or without implants) Indication • Routinely recommended Indication • If planar imaging is nondiagnostic, usually late phase SPECT/CT • To help identify patients with LBP that would benefit from facet joint infiltration • In the post-surgery setting (with or without implants) Acquisition • Anterior and posterior images • 256 x 256 matrix • LEHR or LEGP collimators • 2-5 minutes per view Acquisition • Anterior/posterior images • 256 x 256 matrix • LEHR collimators • 5 minutes/500 kcts per view Acquisition SPECT • LEHR collimators, Matrix 128 x 128 • 60-128 angles, 15-20 seconds/ angle • Step mode, Non-circular rotation Attenuation correction/ localization CT • 2.5 – 40 mA, 80 – 130 keV • 1 – 5 mm slice thickness Diagnostic CT • 40 – 335 mA, 80 – 130 keV • 0.33 – 2.0 mm slice thickness

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