Computed radiography (CR) sometimes called “film replacement technology” uses cassette-based phosphor storage plates (Imaging Plates or IP). When the IP is exposed to X-ray radiation the phosphor layer in the plate stores the image. The IP is then scanned and converted to a digital signal which is transferred to a computer for processing and display. Digital radiography (DR) systems use active matrix flat panel detectors based on direct or indirect conversions of X-rays to charge, the image is converted to digital data in real-time and is available for review within seconds.
While both CR and DR have a wider dose range and can be post processed to eliminate mistakes and avoid repeat examinations, DR has some significant advantages over CR.
DR improves workflow because more images can be taken and processed in the same amount of time, allowing imaging facilities to handle more patients in a given period of time and consequently lowers the cost per image. DR systems house all components together and do not require any transfer of film or cassette. The time needed to produce a final DR image is 10 seconds or less.
CR involves more steps because cassette processing takes longer. CR requires the cassette be removed from the X-ray machine and then placed into a reader. This is a labour-intensive and time-consuming step that requires the technician to leave the patient and workstation with each imaging procedure.
Both GOS (gadolinium oxysulfide) and CsI (cesium iodide) based DR detectors have higher dose efficiency than CR. When DR with CsI is used, DR systems are two to three times more efficient at converting dose to signal than CR. This increased dose utilization means that DR can produce the same image quality as CR at a lower dose or that DR can produce higher contrast resolution images than CR using the same dose.
IP plates used in CR have a lower efficiency of detection compared to DR detectors, thus a higher radiation dose is needed to obtain adequate image resolution resulting in longer exposure times and the need for more powerful x-ray generators.
Flexibility, Portability and Cost
DR detector panels are now equipped with a data processing engine and carry their own calibration files, which allows the images to be corrected on the panel. With the calibration data stored on the panel, the DR panels are more portable between equipment and rooms. On-panel image corrections decrease the image transmission time and improve the wireless link robustness by reducing the number of images transmitted with each image acquisition. State-of-the art DR panels are now also equipped with the most advanced wireless networking standards increasing transmission speed and reliability.
The initial cost of CR is lower, however maintenance costs on CR are 80% higher than on DR. Less real estate is required with DR as the full system only consists of a panel (460x460x15mm) and desk top computer, whereas a full CR system consists of the CR unit (560x540x392mm), cassettes and desktop computer.
More than 40% of the women who fail to re-attend screening mammography appointments confirm pain as the main cause for the non-attendance. Find out how Fujifilm’s proprietary “Fit Sweet” paddles system can improve patients’ experience. For most women pain is directly related to the compression which is applied to the breast during mammography examinations. However this procedure is essential to stabilize breast position during exposure (to prevent motion artifacts) and to reduce tissue thickness as much as possible (to improve image quality and to support a better visualization of the glandular content). The “Fit Sweet” paddles feature a flexible surface that flexes according to breast size and density, evenly distributing the compression force over the contact surface of the tissue with the paddle. The paddles take advantage of a smart combination of different construction materials, and of a flexible link with the gantry of the system. This advanced construction ensures an optimal stabilization of the breast thanks to a very wide area of contact, while reducing the pressure that is applied to the most sensitive area. The “Fit Sweet” paddle always adapts its shape to the breast, providing a personalized compression to each patient.
AMULET Innovality employs a direct-conversion flat panel detector made of Amorphous Selenium (a-Se) which exhibits excellent conversion efficiency in the mammographic X-ray spectrum. The new HCP (Hexagonal Close Pattern) detector efficiently collects electrical signal converted from X-rays to realize both high resolution and low noise. This unique design makes it possible to realize a higher DQE (Detective Quantum Efficiency) than with the square pixel array of conventional TFT panels. With the information collected by the HCP detector, AMULET Innovality creates high definition images with a pixel size of 50 μm; the finest available with a direct-conversion detector.
Tomosynthesis: making it possible to observe the internal structure of the breast
In breast tomosynthesis, the X-ray tube moves through an arc while acquiring a series of low-dose x-ray images. The images taken from different angles are reconstructed into a range of Tomosynthesis slices where the structure of interest is always in focus. The reconstructed tomographic images make it easier to identify lesions which might be difficult to visualize in routine mammography because of the presence of overlapping breast structures. The Tomosynthesis function on AMULET Innovality is suitable for a wide range of uses, offering two modes to cater for various clinical scenarios. Standard (ST) mode combines rapid exposure timing and efficient workflow with a low X-ray dose while High Resolution (HR) mode makes it possible to produce images with an even higher level of detail, allowing the region of interest to be brought into clearer focus.
On Tuesday 24 March 2020 the South African Government confirmed, that veterinary services will continue to operate during the 21 day lockdown period. Lomaen Medical want to reassure our veterinary customers, that we are here to support you in continuing to provide the best animal care in spite of the uncertain circumstances we face at present.
Service Support – Our service team are on hand to respond to emergency breakdowns. You can reach us at any time by calling 086 156 6236 / 011 608 3150 or email email@example.com
Technical Support – Our technical team are on hand to support you with your imaging needs. You can reach us at any time by calling 086 156 6236 / 011 608 3150 or emailing firstname.lastname@example.org
Installations – Emergency installations will still be carried out. You can reach us at any time by calling 011 608 3150 or emailing email@example.com
Equipment – You can still get in touch with your local Sales and Account Manager via email or telephonically if you want to purchase any equipment. Find our contact details here – https://www.lomaenmedical.co.za/contact/
Protection Measures – The health and safety of our customers and staff is our number one priority in the current situation. We have distributed guidelines to all staff on how to protect themselves and our customers at both Head Office and in the field in order to prevent of the spread of COVID-19
the last 25 years we have built long lasting relationships and we are dedicated to providing products and
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for our veterinary customers.
We know this is a difficult time for you and your
family and wish you all the best over the next few weeks.