Digital Radiography in Equine Practice

Abstract

Digital radiography (DR) is a relatively new imaging modality that has recently become available for routine equine imaging. Like a digital camera, the image is visible within seconds of exposure without the need for chemical film processing or laser scanning a phosphor-based imaging cassette. The principal advantage of digital radiography over film/screen systems or computed radiography (CR) is the increased speed and efficiency of obtaining radiographs and immediate image preview. Two other general advantages are a wide exposure latitude as well as superior image quality from postprocessing, which primarily enhances spatial and contrast resolution. The ability to rapidly review, archive, and transmit digital images is also advantageous. Large studies can be displayed and organized by patient information and date with “the click of a mouse.” When displaying digital radiographs, a user can adjust the properties of an image to change parameters such as brightness, contrast, and magnification. The images and associated patient information can be securely archived with PACS (Picture Archiving and Communication System) or written to portable digital media such as CD-ROM or DVD. Digital radiographs can be sent electronically to other veterinarians for additional evaluation, which improves turnaround times for second opinions or prepurchase exams. However, the security of archiving and transmitting digital images needs serious consideration in equine practice and is best discussed with a computer security expert. The disadvantages of digital radiography are the initial cost and the potential risk of damage to expensive equipment. Nonetheless, some equine practices report that the increased efficiency of DR ultimately leads to greater revenue. In addition, extra care and common sense when handling an animal greatly reduce the risk of equipment damage. An equine practitioner considering DR needs to assess the advantages of increased efficiency and improved image quality against the considerable investment in new technology and the risk of equipment damage. Furthermore, the prospective buyer must carefully evaluate the different quality parameters, features, and ease of use.