Tag Archives: uniformity

Phantom QA Kit
4
Feb

Overview

Phantom QA kits include objects to test resolution contrast uniformity and geometric accuracy across modalities. Regular phantom testing verifies system performance and detects degradation. QA kits support accreditation and regulatory compliance.

Modality Specific Phantoms

Different phantoms exist for CT MRI ultrasound and x ray testing. Each phantom targets modality specific metrics such as slice thickness or signal uniformity. Standardized phantoms enable benchmarking across sites.

Testing Frequency

Daily weekly and monthly tests are scheduled based on modality and clinical volume. Automated analysis tools streamline QA reporting and trend analysis. Immediate action is taken for out of tolerance results.

Documentation and Traceability

QA results are documented and trended to detect gradual performance changes. Calibration and corrective actions are recorded for audit readiness. Staff training ensures consistent test execution.

Gamma Camera
4
Feb

Overview

A gamma camera detects gamma rays emitted by radiopharmaceuticals to form functional images. It supports planar imaging and single photon emission computed tomography. Collimators shape the detected photon distribution for resolution and sensitivity tradeoffs.

Collimators

Collimator selection affects spatial resolution and sensitivity for specific studies. Low energy high resolution and high sensitivity collimators are chosen based on tracer and clinical need. Collimator integrity is checked during QC.

Energy Window and Calibration

Energy window settings optimize detection of specific photon energies. Daily calibration and uniformity checks ensure consistent performance. Quality control prevents artifacts and quantification errors.

Hybrid and SPECT CT

Many gamma cameras are combined with CT for anatomical correlation. SPECT CT improves localization and attenuation correction. Integration enhances diagnostic confidence and reporting.