LANDAUER Medical Physics provides a comprehensive evaluation of the calibration and performance of all types of x-ray equipment, including radiographic and fluoroscopic X-ray, C-arms, CT units, Nuclear Medicine cameras, PET and PET/CT units, MRI units, mammography equipment, CR readers and PACS workstations, to ensure that your equipment is performing to manufacturer’s specifications and providing optimal image quality results. Technique charts, skin entrance exposures, and regulated parameters (state, FDA, MQSA, and JCAHO) as well as parameters essential to good quality control are assessed and documented. Specific requirements for these services are based on state regulations, but they are typically required annually or following any servicing or relocation of the equipment.
Equipment Performance Tests:
Radiology & Fluoroscopy (R/F): Performance tests, set by regulatory agencies, include: collimation, kVp accuracy, radiographic timer, mR/mAs linearity, tomography, fluoroscopic image quality, AEC performance, exposure switch, interlocks, half value layer, fluoroscopic timer, fluoroscopic exposure rates, and SID indicator accuracy.
Computed Radiography (CR): CR systems are tested for image quality and dose calibration. Parameters routinely evaluated include: image plate uniformity, dark noise, signal response for linearity, calibration and beam quality, laser beam function, high-contrast resolution, distortion, and throughput. Image workstation displays are monitored annually for proper brightness and contrast. Improperly calibrated displays can obscure subtle abnormalities.
Mammography (Mamo): We survey hundreds of mammography facilities each year – from large university and private practice centers to small hospitals and multi-specialty clinics. To meet MQSA standards, we incorporate the following tests: collimation assessment, system resolution, AEC assessment, screen speed uniformity. Artifact evaluation, image quality evaluation, kVp, HVL, breast entrance exposure, average glandular dose, radiation output rates. compression evaluation, viewbox luminance, and QC program review.
Nuclear Medicine / PET (NM): Nuclear medicine and PET departments are required by their radioactive material license to commit to a substantial list of activities, including camera quality control, survey meter calibrations, proper radioactive material handling, and many more. We have performed hundreds of on-site assessments to help clients ensure all regulatory commitments are being met. Our assessors have direct experience as Nuclear Medicine Technologists and state inspectors.
Computed Tomography (CT): Acceptance and annual surveys requirements are performed according to regulatory and manufacturer specification. These tests include: dose profile width, spatial resolution, low-contrast detectability, and patient dose. Since 2005, UMP has performed all routine CT testing using the ACR CT Accreditation program phantom and imaging standards. Whether accredited or not, our clients know how their systems perform against the ACR’s widely accepted benchmarks of image quality and dose.
Magnetic Resonance Imaging (MRI): The ACR MRAP Site Instructions recommend that facilities utilize their medical physicist to assist with the phantom imaging (acquisition and quantitative analysis) before these images are submitted to ACR. We have performed this service for many clients over the years, and have assisted with accreditation of MR scanners. Since the ACR issued their newest White Paper on MR Safety in June 2007, UMP has provided many facilities (and their architects and planners) with guidance in design of new MR scanning suites and recommendations for safety improvement for existing suites. UMP is ready to help you to assure image quality, safety and assist with MR Accreditation.