Medical Imaging Technology: Advances, Challenges, and Human Factors

Introduction to Medical Imaging Technology

Technology and its applications in medical fields are proliferating faster than proverbial rabbits. Advances in digital data transmission, combined with the application of MRI technology and microcircuitry, have created opportunities for the medical profession to gain more accurate information, analysis, and prognoses than ever before. MRI machines produce images that are clearer and virtually three-dimensional, giving medical staff richer diagnostic information to work with.

In previous decades, developing the skills to read imaging devices was folded into broader medical disciplines. Today, however, universities offer advanced bachelor's and master's degrees specifically in medical imaging technology, reflecting how far the field has matured as a distinct profession.

Like any emerging field, the perceived value and the actual value that medical imaging brings can differ significantly. Increasing technology is neither solely a problem for the medical community to solve nor the salvation of the entire field. Technology is a tool, and the most important factor determining a tool's usefulness is the relationship between the tool and those who use it. Too often, because of unexamined assumptions or poor training, that relationship is problematic. To address the challenge that technology poses, we must understand its limits and also recognize the human dynamics that cloud the judgment of those who adopt new tools. Much has been written about the "art" and the "science" of medical practice, and in regard to new and emerging technologies, the effectiveness of new devices is very much determined by both the science of the device and the artfulness with which it is used.

Human Factors Influencing Technology Use

There are five human characteristics that, like a handbill for a new theater show, entice the field to treat technology as the magic potion of the modern medical world. These factors are:

1. Wonder and wonderment: The first hold that technology has on us is wonder and wonderment. Everybody loves the new and the shiny, especially when it performs fantastic or seemingly inexplicable feats. Wonder is a state that throws people out of equilibrium.

2. The lure of the immediate: The second reason for technology's hold on physicians is that it roots us in the present moment. The numbers on a readout, images on film, the dexterity required for deployment, technical complexities, tubes, wires, plugs, valves, needles, gauges, mirrors, and focusing devices all exist in the here and now — the immediate moment.

3. Unambiguous values: The third aspect of technology — its unambiguous values — keeps it employed even when it is inappropriate. Virtually all technology is marked by similarly clear-cut outputs. In fact, a lack of ambiguity is essential to good medical science.

4. The avoidance of uncertainty: The central problem physicians confront is uncertainty, which is the next reason for the dominance of technology. It is doubt that grays hair. Uncertainty typically arises from two sources: defects in the knowledge of the individual physician, and inadequacies in the profession's collective knowledge.

The Promise of Medical Imaging

5. Human desire for power: The final reason for the inappropriate use of technology is the power it confers on physicians and their institutions (Cassell, 1993).

Medical imaging technology can play to all five of these human weaknesses. The power and promised convenience of new medical imaging devices have revolutionized the industry. In order to assess the likely changes in the medical imaging sector over the next five to ten years, it is necessary first to identify a goal: What is the promise of medical imaging technology? What contribution might it make to human health? Where are there definite advantages for the field, and where is the imaging technology simply "flash and glitter"?

At the core of the medical imaging opportunity are two potential benefits: greatly improving human health diagnosis while simultaneously offering much greater flexibility in the availability and method of its delivery. Between these two benefits lies the potential to control or reduce health costs while improving quality and accessibility. In combination with other medical disciplines — such as surgery — imaging also offers the potential to radically improve patient treatment through integrated image-guided therapy. The broadest benefits, however, are likely to be seen in improvements to diagnostic services: in both quality and accessibility.

Conclusion

The clear disadvantages to this mode of transmission include cost, time, and a lack of easy image duplication. As with storage and retrieval, the transmission of digital medical images draws upon technologies — such as telecommunications and networking — that are outside of medical imaging proper. The drivers for this technology also lie outside of medical imaging, although imaging will benefit from the inevitable fruits of lower-cost, higher-capacity transmission.

Medical imaging technology holds enormous promise for improving healthcare diagnostics and patient treatment, but realizing that promise requires more than technical innovation. It demands an honest awareness of the human tendencies that can lead clinicians to over-rely on or misuse powerful tools. At the same time, the practical challenges of integration and standards-setting must be resolved before the field can fully transition from a fragmented, equipment-driven model to a coherent, information-management-driven one. Technology, ultimately, is a tool — and its value will always depend on the wisdom and self-awareness of those who use it.