SPECT QC
Energy Peak rmity Resolution Linearity Center of Rotation COR high - count extrinsic flood field uniformity correction Jaszczak
Center of Rotation COR -
NTRADY12 COR reduces spatial resolution & blurring Image contrast a measure Performed to ensure center field of view of camera detect ...
NMTCB BOARD EXAM GUIDE 2024 SPECT QC Energy Peak 2.uniformity Resolution Linearity Center of Rotation COR high - count extrinsic flood field uniformity correction Jaszczak Center of Rotation COR - NTRADY12 COR reduces spatial resolution & blurring Image contrast a measure Performed to ensure center field of view of camera detect or matches computer software High count extrensic flood - field uniformity correction Performed directly by manufacturer used to ensure efficiency photon decfection is constant across an surface of collimated detector . -30-100 mil . counts defeciency causes ring artifact in SPECT Imaging Jaszczak SPECT Phantom test - Jaszczak determines 3D contrast , resolut von , & uniformity of SPECT camera . - 30mil.counts Combined SPECT CT QC Includes all QC + Registration attenuation correction accuracy or mis registration consequences SPECT QC NMTCB SPECT / CT QC 1. Peak 2. uniformity 3. Resolution 4. Untarity 5. High Count extrinsic floodfield uniformity Correction B 6 COR Dopamos 7. Jaszczak 8.Source strength 9.Transmission source mechanics Energy Peak confirm the camera is counting Photon in the Proper energy Windows . -Transmission source mechanics confirm operation of the source Shutter & translating mechanics , & reference blank transmission Scan should be acquired . Weekly ( preferably daily) SPECT / CT X - ray based NMTCB QC - all spect / CT QC including CT QC 1.Calibration 2.field uniformity Calibration CT number inserted Phantom L considerd not calibrated if error is greater than 5 Hounsfield units Field uniformity ensures uniform response throughout FOV - Brain Perfusion raphas Rapha Team Exametazine ECD , Dicisate , Cretec HMPAO Brain perfusion dose 10-20mCi Brain perfusion Indications 1. cerebrovascular disease - acute stroke transient ische - mic attacks 2. Dementia - Alzheimer's disease , multi - infarct dementia 3. Psychiatric disorder - affective disorder ( depre && Von Schizophrenia 4. Seizure disorder - idenification & location of focal epilepsy sites 5. Head Trauma ( cerebral brain death ) Brain perfusion imaging time 15-20min post injection (preferably @ 45min) Brain cross sections Mans axial Coronal sagital PET Oncology rapha F18- FDG FDG -F18 dose 5-20mCi intravenously FDG -F18 pt questions Pt History , surgenes , chemo radiation therapy , previous Imaging results , Pt . cooperation lying still for hrs & arms up . Laxative may given night before to prevent bowel inter ferring Blood Glucose Less than 200mcg Bone pain associated w / metastatic bone disease raphas Sr 89 Sm 153 P32 ST89 Chloride half life 50.5day ST89 Chloride analog -calcium analog cleared from blood stream & localizes in bont SR89 Chloride localization -localizes in areas of active osteogenesis in metastatic Sites longer than in normal bone -Sr 89 dose 40-60uCi & repeat dose @ 12 weeks Moving a pt from wheelchair to bed; wheelchair is in what degree 45° Filters that get rid of star artifact
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