Title |
A New Frontier in Temporal Bone Imaging: Photon-Counting Detector CT Demonstrates Superior Visualization of Critical Anatomic Structures at Reduced Radiation Dose
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Published in |
American Journal of Neuroradiology, March 2022
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DOI | 10.3174/ajnr.a7452 |
Pubmed ID | |
Authors |
J.C. Benson, K. Rajendran, J.I. Lane, F.E. Diehn, N.M. Weber, J.E. Thorne, N.B. Larson, J.G. Fletcher, C.H. McCollough, S. Leng |
Abstract |
Photon-counting detector CT is a new technology with a limiting spatial resolution of ≤150 μm. In vivo comparisons between photon-counting detector CT and conventional energy-integrating detector CT are needed to determine the clinical impact of photon counting-detector CT in temporal bone imaging. Prospectively recruited patients underwent temporal bone CT examinations on an investigational photon-counting detector CT system after clinically indicated temporal bone energy-integrating detector CT. Photon-counting detector CT images were obtained at an average 31% lower dose compared with those obtained on the energy-integrating detector CT scanner. Reconstructed images were evaluated in axial, coronal, and Pöschl planes using the smallest available section thickness on each system (0.4 mm on energy-integrating detector CT; 0.2 mm on photon-counting detector CT). Two blinded neuroradiologists compared images side-by-side and scored them using a 5-point Likert scale. A post hoc reassignment of readers' scores was performed so that the scores reflected photon-counting detector CT performance relative to energy-integrating detector CT. Thirteen patients were enrolled, resulting in 26 image sets (left and right sides). The average patient age was 63.6 [SD, 13.4] years; 7 were women. Images from the photon-counting detector CT scanner were significantly preferred by the readers in all reconstructed planes (P < .001). Photon-counting detector CT was rated superior for the evaluation of all individual anatomic structures, with the oval window (4.79) and incudostapedial joint (4.75) receiving the highest scores on a Likert scale of 1-5. Temporal bone CT images obtained on a photon-counting detector CT scanner were rated as having superior spatial resolution and better critical structure visualization than those obtained on a conventional energy-integrating detector scanner, even with a substantial dose reduction. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 4 | 33% |
Canada | 1 | 8% |
Mexico | 1 | 8% |
Japan | 1 | 8% |
Unknown | 5 | 42% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 7 | 58% |
Practitioners (doctors, other healthcare professionals) | 2 | 17% |
Scientists | 2 | 17% |
Science communicators (journalists, bloggers, editors) | 1 | 8% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 31 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 9 | 29% |
Student > Ph. D. Student | 3 | 10% |
Student > Master | 1 | 3% |
Professor > Associate Professor | 1 | 3% |
Student > Postgraduate | 1 | 3% |
Other | 0 | 0% |
Unknown | 16 | 52% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 8 | 26% |
Physics and Astronomy | 2 | 6% |
Computer Science | 1 | 3% |
Arts and Humanities | 1 | 3% |
Nursing and Health Professions | 1 | 3% |
Other | 1 | 3% |
Unknown | 17 | 55% |