Dr T.B.S. Buxi , Chairman CT & MRI Departments , Sir Ganga Ram Hospital , New Delhi

"CT technology is expected to evolve into its next generations much faster given the faster innovation cycles. "

Due to its unmatched accessibility, high speed, and diagnostic accuracy, CT imaging is one of the most widely used modality in the diagnosis of different diseases and injuries, totaling more than 400 million imaging procedures globally per year.

Conventional CT scans could produce inaccurate data that can require additional testing. Thus to provide better analytical outcome proper examination needs to be instituted to come to the right diagnosis in the very first scan.

CT technology has evolved significantly from older generation to multislice CT with high diagnostic accuracy. For example, multislice CT offers advances in CT scanner design and technology to help give physicians the speed and performance to do more. The spectral-detector CT system is built such that it can capture the entire spectrum of emerging radiation from the patient. Segregation of various energies is the key. One is able to visualize the outcome of each energy separately titrating the remainder energies thus evaluation of various types of kidney stones and gall stones has become noteworthy. This is similar to the white light being made of a spectrum of colors. The development of a fundamentally new spectral detector system can help discriminate between X-ray photons of multiple high and low energies simultaneously.

Current spectral CT scanners add a new dimension to CT imaging, delivering not only anatomical information but also the ability to characterize structures based on their material makeup within a single scan. After a spectral CT examination, clinicians can interpret the conventional grey-scale anatomical images, and if necessary, access the spectral information that was acquired during the same scan. The spectral CT system's retrospective on-demand data analysis has made it possible, allowing clinicians to easily experience the benefits of spectral CT routinely within traditional radiology workflows. Spectral CT is a comprehensive CT diagnostic spectral solution for every patient, delivering valuable clinical insights such as improved tissue characterization and visualization for confident disease management. Fully integrated with your current workflow, this proprietary approach to CT delivers extraordinary diagnostic quality, with spectral results available as part of our routine CT scan.

Exam cards are evolving as the future of the scanning protocols. These can be used to perform axials, coronals, sagittals, MPRs, MIPs, and other examinations, all of which will be automatically reconstructed and can be sent to where they will be read with no additional work required by the operator.

Patient-dose optimization is getting further amplified with more R&D and innovations with iterative reconstruction technique setting a new direction in CT image quality with industry-leading low-contrast resolution and virtually noise-free images. Current technologies also offer fast reconstruction speed to support the most demanding studies. CT images can simultaneously lower radiation dose by 60–80 percent, with 43–80 percent improvement in low-contrast detectability and 70–83 percent less image noise, relative to standard reconstruction techniques. Patient radiation exposure has reduced.

Given the strategic importance of driving diagnostic outcomes further, CT technology is expected to evolve into its next generations much faster given the faster innovation cycles.

The need for noninvasive coronary angiography is now understood by the common man. More so, changes in assessment of the various lung diseases have also become more defined. Thus lung volume reduction surgery is possible by assessing volume of various lung segments. Cerebral perfusion imaging has reinforced early evaluation in patients regarding impending strokes. Evaluation of liver tumors, cancers has become relatively easy because of shortening of scan times. Thus liver transplant evaluation for donor and recipient has become easy. However, the need for radiologists asking for details of clinical history, review of previous records is re-emphasized to enable them to choose a proper scanning protocol.

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