Uniformity Nuclear Medicine
ACR Nuclear MedicinePET Accreditation Program Requirements 3282008 1. In nuclear medicine the basis of image quality is the ability of the imaging device to detect differences in the uptake of a radiopharmaceutical in a lesion and its surroundings.
Sensitivity - verify that count rate per unit activity is satisfactory 5.
Uniformity nuclear medicine. Butterworth filters are the most commonly used for nuclear medicine procedures 1. Another method of uniformity correction-to use the complete capabilities of this tool-is discussed and evaluated in this article. It should be particularly useful for residents fellows and other trainees in nuclear medicine nuclear.
Department of Nuclear Medicine Academic Medical Centre Amsterdam The Netherlands e-mail. Nuclear Medicine Performance Tests. September 2012 - Volume 33 - Issue 9 - p 917-925.
When selecting a processing filter there is always a trade-off between image contrast and image uniformity. This article reviews routine quality-control QC procedures for current nuclear medicine instrumentation including the survey meter dose calibrator well counter intraoperative probe organ thyroid uptake probe γ-camera SPECT and SPECTCT scanner and PET and PETCT scanner. Płachcínska Department of Nuclear Medicine Medical University Łódz Poland A.
The aim of this study is to assess the reliability of Beth Israel Deaconess Medical Centers locally built centralized Web-based uniformity analysis system by examining the differences between manufacturer and Web-based National Electrical Manufacturers Association integral uniformity. System uniformity with all commonly used collimators for each gamma camera head. Nuclear MedicinePET Phantom Image Atlas.
All nuclear medicine imaging equipment must be tested upon installation and monitored at least annually by a. Intrinsic or System Spatial Resolution 3. We sought to determine the best parameters for rapid performance of daily quality control testing of intrinsic uniformity and relative sensitivity for the single-head gamma- camera system in our nuclear medicine departmentMethods.
Gamma source activity number of acquired counts for the flood. Images should be reviewed qualitatively andor quantitatively. Performed to ensure that the intrinsic detector integral and differential uniformity are sufficient to minimize the production of artifacts and ensure that patient abnormalities can be visualized without interference from the imaging system.
Affiliation 1 Clinical Imaging. Authors Jeffrey S Nelson 1 Olav I Christianson Beth A Harkness Mark T Madsen Eugene Mah Stephen R Thomas Habib Zaidi Ehsan Samei. Tc-99m or Co-57 Large rectangular FOV 5000K counts Large and small circular and small rectangular FOV 3000K counts 256 x 256 matrix.
The cut-off frequency is the frequency above which all data is removed. System Uniformity - check all collimators 4. The effects of the following parameters on intrinsic uniformity were studied.
Improved nuclear medicine uniformity assessment with noise texture analysis J Nucl Med. This study aimed to quantitatively evaluate population variability regional uniformity and repeatability of myocardial blood flow measurements using 13 N-ammonia and small animal PET. Epub 2013 Nov 8.
The goal of this project was to develop test and validate a new uniformity analysis metric capable of accurately identifying structures and patterns present in nuclear medicine flood-field uniformity images. Other degrading factors are dependent on the patient and organ localization. Georges Healthcare NHS Trust London UK M.
SPECT produces nuclear medicine images using a 3-dimensional diagnostic tool that eliminates the superimposition of adjacent structures thus providing improved disease localization. Nuclear Medicine Technologist Quality Control List. The ACR-approved SPECT phantom is commonly used for quality control in nuclear medicine.
Intrinsic uniformity for each camera head a. Given the transience of performance flood-field uniformity testing is an essential part of the assessment of nuclear medicine γ cameras Such testing is typically the first type of testing performed at acceptance and is considered the central element of quality control programsacquired and assessed on. 1-3 Currently one of the most valuable assessments is the uniformity evaluation routinely performed on a daily basis prior to patient imaging.
Count Rate Parameters 7. Uniformity must be checked every day that gamma camera is used before the first patient Uniformity flood image may be acquired with collimator on for system extrinsic uniformity or collimator off for intrinsic uniformity 5 million counts is adequate for daily QC for large FOV camera Check that photopeak is centered in energy window. Uniformity testing is performed daily to ensure adequate camera performance before clinical use.
For cameras that are used to perform planar and SPECT imaging studies an ACR-approved phantom must be used for evaluating planar and tomographic image qualityThe phantom is a cylinder with an internal diameter of 204 cm flangeless phantom. Overall System Performance for SPECT. In nuclear medicine NM a robust quality control QC program is essential for detecting detrimental changes in camera performance allowing for remediation prior to clinical involvement.
Britten Department of Medical Physics and Bioengineering St. Intrinsic or System Uniformity each day of use. Uniformity images must be acquired with 256x256 matrix and with 5 or 10 million counts depending on the scanner size unless your scanner does not have 256x256 matrix capability some cardiac scanners are only able to acquire 64x64 matrix.
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