Photon-counting detector computed tomography: A tribute to 125th anniversary of the X-rays discovery by Wilhelm Conrad Röntgen
Abstract
Aim: The aim of the study is to summarize the first experience with the imaging using prototype of single-source photon-counting-detector CT in clinically indicated examinations. Method: All examinations were performed using single-source CT equipped with photoncounting detector.
The sample of examinations in 50 patients were evaluated. There were 20 lung parenchyma examinations in diffuse lung diseases (including 10 with ultrahigh resolution mode with slice resolution 0.2 mm), 15 examinations of the abdomen in arterial and portal venous phase (incl. 5 ultrahigh resolution mode with slice resolution of 0.2 mm), 10 examinations of cervical and intracranial arteries, five brain examinations including ultrahigh resolution of the temporal bone.
The data acquisition was made using resolution of 0.4 mm for a standard mode and 0.2 mm for ultrahigh resolution. Results: In non-selected patients with the indication for a clinical imaging, there were obtained images fully useful for a clinical assessment.
Those images were minimally at the same level as made with conventional CT, or better. Thanks to the excellent resolution, it could be possible to visualize the tiny anatomical structures like bronchi on sub-segmental level of higher generation, the high quality display of vascular structures and articulations of middle ear ossicles.
The effective dose equivalent reaches value less than one mSv in all lung, cervical and intracranial arteries, brain and temporal bone, those examinations of the abdomen did not exceed the for conventional CT typical levels of mSv. Conclusion: The imaging using photoncounting-detector CT were acquired with full clinical usefulness, radiation doses burden to the scanned individual are lower than those in conventional CT in most of indication.
The subtle, submillimeter details of the anatomical structures could be visualized with the high certainty. (C) 2020, Galen s.r.o.. All rights reserved.